SelectionDAGISel.cpp revision 23d564c11fbe628dbebd6d8f09d7d07fa862b719
11c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===-- SelectionDAGISel.cpp - Implement the SelectionDAGISel class -------===// 2edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 31c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// The LLVM Compiler Infrastructure 41c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 51c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// This file was developed by the LLVM research group and is distributed under 61c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// the University of Illinois Open Source License. See LICENSE.TXT for details. 7edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 81c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 91c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// This implements the SelectionDAGISel class. 111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define DEBUG_TYPE "isel" 151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAGISel.h" 16a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng#include "llvm/CodeGen/ScheduleDAG.h" 17adf6a965a321372c640845407195594835921eb4Chris Lattner#include "llvm/CallingConv.h" 181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Constants.h" 191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/DerivedTypes.h" 201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Function.h" 2136ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner#include "llvm/GlobalVariable.h" 22ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner#include "llvm/InlineAsm.h" 231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instructions.h" 241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Intrinsics.h" 25b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner#include "llvm/CodeGen/IntrinsicLowering.h" 26b2efb853f00d45b1c8d57f92acd0028fbdeffda6Jim Laskey#include "llvm/CodeGen/MachineDebugInfo.h" 271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFrameInfo.h" 291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineInstrBuilder.h" 301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAG.h" 311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SSARegMap.h" 32fa57702388f139e964befecb4b98c7dfe836945fChris Lattner#include "llvm/Target/MRegisterInfo.h" 331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetData.h" 341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetFrameInfo.h" 351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetInstrInfo.h" 361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetLowering.h" 371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetMachine.h" 38495a0b51915eb763576874f29192820b731edc22Chris Lattner#include "llvm/Transforms/Utils/BasicBlockUtils.h" 397944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#include "llvm/Support/CommandLine.h" 407c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner#include "llvm/Support/MathExtras.h" 411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Support/Debug.h" 421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <map> 434e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner#include <set> 441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <iostream> 457e88103cdea8c36b2229dae8c60def14e3816512Jeff Cohen#include <algorithm> 461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerusing namespace llvm; 471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 48da8abb02397d7cd62a1e16e7c534edd7096ac873Chris Lattner#ifndef NDEBUG 497944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattnerstatic cl::opt<bool> 50a9c2091cd38e401c846391c9951ff416e709b65eEvan ChengViewISelDAGs("view-isel-dags", cl::Hidden, 51a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng cl::desc("Pop up a window to show isel dags as they are selected")); 52a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic cl::opt<bool> 53a9c2091cd38e401c846391c9951ff416e709b65eEvan ChengViewSchedDAGs("view-sched-dags", cl::Hidden, 54a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng cl::desc("Pop up a window to show sched dags as they are processed")); 557944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#else 56a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic const bool ViewISelDAGs = 0; 57a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic const bool ViewSchedDAGs = 0; 587944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#endif 597944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner 6020a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner// Scheduling heuristics 6120a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattnerenum SchedHeuristics { 6220a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner defaultScheduling, // Let the target specify its preference. 6320a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner noScheduling, // No scheduling, emit breadth first sequence. 6420a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner simpleScheduling, // Two pass, min. critical path, max. utilization. 6520a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner simpleNoItinScheduling, // Same as above exact using generic latency. 6620a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner listSchedulingBURR, // Bottom up reg reduction list scheduling. 6720a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner listSchedulingTD // Top-down list scheduler. 6820a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner}; 6920a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner 704ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Chengnamespace { 714ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng cl::opt<SchedHeuristics> 724ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng ISHeuristic( 734ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "sched", 744ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng cl::desc("Choose scheduling style"), 753f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng cl::init(defaultScheduling), 764ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng cl::values( 773f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng clEnumValN(defaultScheduling, "default", 783f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng "Target preferred scheduling style"), 794ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValN(noScheduling, "none", 8017d52f723421ce28d1b9fe2fc058366ed43ec094Jim Laskey "No scheduling: breadth first sequencing"), 814ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValN(simpleScheduling, "simple", 824ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "Simple two pass scheduling: minimize critical path " 834ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "and maximize processor utilization"), 844ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValN(simpleNoItinScheduling, "simple-noitin", 854ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "Simple two pass scheduling: Same as simple " 864ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "except using generic latency"), 873f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng clEnumValN(listSchedulingBURR, "list-burr", 88f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng "Bottom up register reduction list scheduling"), 8903fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner clEnumValN(listSchedulingTD, "list-td", 9003fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner "Top-down list scheduler"), 914ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValEnd)); 924ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng} // namespace 934ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 94864635ad7b3046d3042311423071152c613961deChris Lattnernamespace { 95864635ad7b3046d3042311423071152c613961deChris Lattner /// RegsForValue - This struct represents the physical registers that a 96864635ad7b3046d3042311423071152c613961deChris Lattner /// particular value is assigned and the type information about the value. 97864635ad7b3046d3042311423071152c613961deChris Lattner /// This is needed because values can be promoted into larger registers and 98864635ad7b3046d3042311423071152c613961deChris Lattner /// expanded into multiple smaller registers than the value. 99864635ad7b3046d3042311423071152c613961deChris Lattner struct RegsForValue { 100864635ad7b3046d3042311423071152c613961deChris Lattner /// Regs - This list hold the register (for legal and promoted values) 101864635ad7b3046d3042311423071152c613961deChris Lattner /// or register set (for expanded values) that the value should be assigned 102864635ad7b3046d3042311423071152c613961deChris Lattner /// to. 103864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<unsigned> Regs; 104864635ad7b3046d3042311423071152c613961deChris Lattner 105864635ad7b3046d3042311423071152c613961deChris Lattner /// RegVT - The value type of each register. 106864635ad7b3046d3042311423071152c613961deChris Lattner /// 107864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType RegVT; 108864635ad7b3046d3042311423071152c613961deChris Lattner 109864635ad7b3046d3042311423071152c613961deChris Lattner /// ValueVT - The value type of the LLVM value, which may be promoted from 110864635ad7b3046d3042311423071152c613961deChris Lattner /// RegVT or made from merging the two expanded parts. 111864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType ValueVT; 112864635ad7b3046d3042311423071152c613961deChris Lattner 113864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue() : RegVT(MVT::Other), ValueVT(MVT::Other) {} 114864635ad7b3046d3042311423071152c613961deChris Lattner 115864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue(unsigned Reg, MVT::ValueType regvt, MVT::ValueType valuevt) 116864635ad7b3046d3042311423071152c613961deChris Lattner : RegVT(regvt), ValueVT(valuevt) { 117864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(Reg); 118864635ad7b3046d3042311423071152c613961deChris Lattner } 119864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue(const std::vector<unsigned> ®s, 120864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType regvt, MVT::ValueType valuevt) 121864635ad7b3046d3042311423071152c613961deChris Lattner : Regs(regs), RegVT(regvt), ValueVT(valuevt) { 122864635ad7b3046d3042311423071152c613961deChris Lattner } 123864635ad7b3046d3042311423071152c613961deChris Lattner 124864635ad7b3046d3042311423071152c613961deChris Lattner /// getCopyFromRegs - Emit a series of CopyFromReg nodes that copies from 125864635ad7b3046d3042311423071152c613961deChris Lattner /// this value and returns the result as a ValueVT value. This uses 126864635ad7b3046d3042311423071152c613961deChris Lattner /// Chain/Flag as the input and updates them for the output Chain/Flag. 127864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand getCopyFromRegs(SelectionDAG &DAG, 1289f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner SDOperand &Chain, SDOperand &Flag) const; 129c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 130c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner /// getCopyToRegs - Emit a series of CopyToReg nodes that copies the 131c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner /// specified value into the registers specified by this object. This uses 132c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner /// Chain/Flag as the input and updates them for the output Chain/Flag. 133c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner void getCopyToRegs(SDOperand Val, SelectionDAG &DAG, 1349f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner SDOperand &Chain, SDOperand &Flag) const; 135c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 136c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner /// AddInlineAsmOperands - Add this value to the specified inlineasm node 137c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner /// operand list. This adds the code marker and includes the number of 138c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner /// values added into it. 139c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner void AddInlineAsmOperands(unsigned Code, SelectionDAG &DAG, 1409f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::vector<SDOperand> &Ops) const; 141864635ad7b3046d3042311423071152c613961deChris Lattner }; 142864635ad7b3046d3042311423071152c613961deChris Lattner} 1434ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 1441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 1451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner //===--------------------------------------------------------------------===// 1461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FunctionLoweringInfo - This contains information that is global to a 1471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// function that is used when lowering a region of the function. 148f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner class FunctionLoweringInfo { 149f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner public: 1501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 1511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Function &Fn; 1521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF; 1531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SSARegMap *RegMap; 1541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo(TargetLowering &TLI, Function &Fn,MachineFunction &MF); 1561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// MBBMap - A mapping from LLVM basic blocks to their machine code entry. 1581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const BasicBlock*, MachineBasicBlock *> MBBMap; 1591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// ValueMap - Since we emit code for the function a basic block at a time, 1611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// we must remember which virtual registers hold the values for 1621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// cross-basic-block values. 1631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned> ValueMap; 1641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// StaticAllocaMap - Keep track of frame indices for fixed sized allocas in 1661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// the entry block. This allows the allocas to be efficiently referenced 1671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// anywhere in the function. 1681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int> StaticAllocaMap; 1691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned MakeReg(MVT::ValueType VT) { 1711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 1721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 173edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1743c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned CreateRegForValue(const Value *V); 1753c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 1761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned InitializeRegForValue(const Value *V) { 1771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned &R = ValueMap[V]; 1781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(R == 0 && "Already initialized this value register!"); 1791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R = CreateRegForValue(V); 1801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner }; 1821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// isUsedOutsideOfDefiningBlock - Return true if this instruction is used by 1851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// PHI nodes or outside of the basic block that defines it. 1861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerstatic bool isUsedOutsideOfDefiningBlock(Instruction *I) { 1871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (isa<PHINode>(I)) return true; 1881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *BB = I->getParent(); 1891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) 1901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (cast<Instruction>(*UI)->getParent() != BB || isa<PHINode>(*UI)) 1911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 1921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return false; 1931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 195bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// isOnlyUsedInEntryBlock - If the specified argument is only used in the 196bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// entry block, return true. 197bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattnerstatic bool isOnlyUsedInEntryBlock(Argument *A) { 198bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner BasicBlock *Entry = A->getParent()->begin(); 199bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Value::use_iterator UI = A->use_begin(), E = A->use_end(); UI != E; ++UI) 200bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (cast<Instruction>(*UI)->getParent() != Entry) 201bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return false; // Use not in entry block. 202bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return true; 203bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner} 204bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris LattnerFunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, 206edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman Function &fn, MachineFunction &mf) 2071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), Fn(fn), MF(mf), RegMap(MF.getSSARegMap()) { 2081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 209bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Create a vreg for each argument register that is not dead and is used 210bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // outside of the entry block for the function. 21116ce0df92717cd1474029d87efe596d000dc2caaChris Lattner for (Function::arg_iterator AI = Fn.arg_begin(), E = Fn.arg_end(); 21216ce0df92717cd1474029d87efe596d000dc2caaChris Lattner AI != E; ++AI) 213bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!isOnlyUsedInEntryBlock(AI)) 214bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner InitializeRegForValue(AI); 2151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 216bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Initialize the mapping of values to registers. This is only set up for 217bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // instruction values that are used outside of the block that defines 218bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // them. 2192aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen Function::iterator BB = Fn.begin(), EB = Fn.end(); 2201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 2211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) 2221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(AI->getArraySize())) { 2231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = AI->getAllocatedType(); 2241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 225ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = 226ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 227ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman AI->getAlignment()); 228a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner 229a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // If the alignment of the value is smaller than the size of the value, 230a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // and if the size of the value is particularly small (<= 8 bytes), 231a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // round up to the size of the value for potentially better performance. 232a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // 233a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // FIXME: This could be made better with a preferred alignment hook in 234a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // TargetData. It serves primarily to 8-byte align doubles for X86. 235a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner if (Align < TySize && TySize <= 8) Align = TySize; 2362dfa8192abaad8a3c29132dba50e8b85218e918cChris Lattner TySize *= CUI->getValue(); // Get total allocated size. 237d222f6ab67472fa2b2e211172a11b43905aa9445Chris Lattner if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects. 2381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner StaticAllocaMap[AI] = 239f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); 2401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2422aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (; BB != EB; ++BB) 2432aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 2441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!I->use_empty() && isUsedOutsideOfDefiningBlock(I)) 2451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!isa<AllocaInst>(I) || 2461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner !StaticAllocaMap.count(cast<AllocaInst>(I))) 2471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InitializeRegForValue(I); 2481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This 2501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // also creates the initial PHI MachineInstrs, though none of the input 2511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // operands are populated. 2522aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BB = Fn.begin(), EB = Fn.end(); BB != EB; ++BB) { 2531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *MBB = new MachineBasicBlock(BB); 2541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MBBMap[BB] = MBB; 2551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MF.getBasicBlockList().push_back(MBB); 2561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create Machine PHI nodes for LLVM PHI nodes, lowering them as 2581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // appropriate. 2591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 2601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(); 261f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 262f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 263f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 264f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 265f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned PHIReg = ValueMap[PN]; 266f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner assert(PHIReg &&"PHI node does not have an assigned virtual register!"); 267f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0; i != NumElements; ++i) 268f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner BuildMI(MBB, TargetInstrInfo::PHI, PN->getNumOperands(), PHIReg+i); 269f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2733c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner/// CreateRegForValue - Allocate the appropriate number of virtual registers of 2743c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner/// the correctly promoted or expanded types. Assign these registers 2753c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner/// consecutive vreg numbers and return the first assigned number. 2763c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattnerunsigned FunctionLoweringInfo::CreateRegForValue(const Value *V) { 2773c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 2783c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 2793c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // The number of multiples of registers that we need, to, e.g., split up 2803c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // a <2 x int64> -> 4 x i32 registers. 2813c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned NumVectorRegs = 1; 2823c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 2833c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // If this is a packed type, figure out what type it will decompose into 2843c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // and how many of the elements it will use. 2853c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner if (VT == MVT::Vector) { 2863c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner const PackedType *PTy = cast<PackedType>(V->getType()); 2873c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned NumElts = PTy->getNumElements(); 2883c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner MVT::ValueType EltTy = TLI.getValueType(PTy->getElementType()); 2893c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 2903c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // Divide the input until we get to a supported size. This will always 2913c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // end with a scalar if the target doesn't support vectors. 2923c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner while (NumElts > 1 && !TLI.isTypeLegal(getVectorType(EltTy, NumElts))) { 2933c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner NumElts >>= 1; 2943c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner NumVectorRegs <<= 1; 2953c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner } 2966cb7004c3499f07c034a01f6335b5058aa80a5ceChris Lattner if (NumElts == 1) 2976cb7004c3499f07c034a01f6335b5058aa80a5ceChris Lattner VT = EltTy; 2986cb7004c3499f07c034a01f6335b5058aa80a5ceChris Lattner else 2996cb7004c3499f07c034a01f6335b5058aa80a5ceChris Lattner VT = getVectorType(EltTy, NumElts); 3003c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner } 3013c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 3023c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // The common case is that we will only create one register for this 3033c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // value. If we have that case, create and return the virtual register. 3043c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned NV = TLI.getNumElements(VT); 3053c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner if (NV == 1) { 3063c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // If we are promoting this value, pick the next largest supported type. 3073c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner MVT::ValueType PromotedType = TLI.getTypeToTransformTo(VT); 3083c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned Reg = MakeReg(PromotedType); 3093c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // If this is a vector of supported or promoted types (e.g. 4 x i16), 3103c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // create all of the registers. 3113c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner for (unsigned i = 1; i != NumVectorRegs; ++i) 3123c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner MakeReg(PromotedType); 3133c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner return Reg; 3143c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner } 3153c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 3163c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // If this value is represented with multiple target registers, make sure 3173c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner // to create enough consecutive registers of the right (smaller) type. 3183c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned NT = VT-1; // Find the type to use. 3193c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner while (TLI.getNumElements((MVT::ValueType)NT) != 1) 3203c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner --NT; 3213c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner 3223c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner unsigned R = MakeReg((MVT::ValueType)NT); 3233c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner for (unsigned i = 1; i != NV*NumVectorRegs; ++i) 3243c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner MakeReg((MVT::ValueType)NT); 3253c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner return R; 3263c38449be6371d53a58d0df80ecf3772a2f9a79fChris Lattner} 3271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 3291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// SelectionDAGLowering - This is the common target-independent lowering 3301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// implementation that is parameterized by a TargetLowering object. 3311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// Also, targets can overload any lowering method. 3321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// 3331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 3341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerclass SelectionDAGLowering { 3351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *CurMBB; 3361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, SDOperand> NodeMap; 3381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 339d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// PendingLoads - Loads are not emitted to the program immediately. We bunch 340d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// them up and then emit token factor nodes when possible. This allows us to 341d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// get simple disambiguation between loads without worrying about alias 342d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// analysis. 343d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner std::vector<SDOperand> PendingLoads; 344d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 3451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerpublic: 3461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // TLI - This is information that describes the available target features we 3471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // need for lowering. This indicates when operations are unavailable, 3481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // implemented with a libcall, etc. 3491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 3501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAG &DAG; 3511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const TargetData &TD; 3521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FuncInfo - Information about the function as a whole. 3541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// 3551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo; 3561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli, 358edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman FunctionLoweringInfo &funcinfo) 3591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()), 3601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo(funcinfo) { 3611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 363a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// getRoot - Return the current virtual root of the Selection DAG. 364a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// 365a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner SDOperand getRoot() { 366d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.empty()) 367d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return DAG.getRoot(); 368edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 369d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.size() == 1) { 370d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = PendingLoads[0]; 371d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 372d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 373d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 374d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 375d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 376d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Otherwise, we have to make a token factor node. 377d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = DAG.getNode(ISD::TokenFactor, MVT::Other, PendingLoads); 378d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 379d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 380d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 381a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner } 382a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 3831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(Instruction &I) { visit(I.getOpcode(), I); } 3841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(unsigned Opcode, User &I) { 3861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Opcode) { 3871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown instruction type encountered!"); 3881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 3891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Build the switch statement using the Instruction.def file. 3901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define HANDLE_INST(NUM, OPCODE, CLASS) \ 3911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case Instruction::OPCODE:return visit##OPCODE((CLASS&)I); 3921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instruction.def" 3931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void setCurrentBasicBlock(MachineBasicBlock *MBB) { CurMBB = MBB; } 3971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 39828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand getLoadFrom(const Type *Ty, SDOperand Ptr, 39928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand SrcValue, SDOperand Root, 40028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner bool isVolatile); 4011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getIntPtrConstant(uint64_t Val) { 4031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getConstant(Val, TLI.getPointerTy()); 4041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 406199862b74973198c2ab5a139f664c86713e7b579Chris Lattner SDOperand getValue(const Value *V); 4071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const SDOperand &setValue(const Value *V, SDOperand NewN) { 4091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 4101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val == 0 && "Already set a value for this node!"); 4111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = NewN; 4121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4134e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 414864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue GetRegistersForValue(const std::string &ConstrCode, 415864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType VT, 416864635ad7b3046d3042311423071152c613961deChris Lattner bool OutReg, bool InReg, 417864635ad7b3046d3042311423071152c613961deChris Lattner std::set<unsigned> &OutputRegs, 418864635ad7b3046d3042311423071152c613961deChris Lattner std::set<unsigned> &InputRegs); 419864635ad7b3046d3042311423071152c613961deChris Lattner 4201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Terminator instructions. 4211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRet(ReturnInst &I); 4221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitBr(BranchInst &I); 4231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnreachable(UnreachableInst &I) { /* noop */ } 4241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // These all get lowered before this pass. 4261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSwitch(SwitchInst &I) { assert(0 && "TODO"); } 4271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitInvoke(InvokeInst &I) { assert(0 && "TODO"); } 4281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnwind(UnwindInst &I) { assert(0 && "TODO"); } 4291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 4315fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitBinary(User &I, unsigned IntOp, unsigned FPOp, unsigned VecOp); 432e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShift(User &I, unsigned Opcode); 4335fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitAdd(User &I) { 4345fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::ADD, ISD::FADD, ISD::VADD); 43501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 436b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner void visitSub(User &I); 4375fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitMul(User &I) { 4385fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::MUL, ISD::FMUL, ISD::VMUL); 43901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 4401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitDiv(User &I) { 44101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 4423e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng visitBinary(I, 4433e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng Ty->isSigned() ? ISD::SDIV : ISD::UDIV, ISD::FDIV, 4443e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng Ty->isSigned() ? ISD::VSDIV : ISD::VUDIV); 4451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRem(User &I) { 44701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 4485fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, Ty->isSigned() ? ISD::SREM : ISD::UREM, ISD::FREM, 0); 4491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4503e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng void visitAnd(User &I) { visitBinary(I, ISD::AND, 0, ISD::VAND); } 4513e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng void visitOr (User &I) { visitBinary(I, ISD::OR, 0, ISD::VOR); } 4523e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng void visitXor(User &I) { visitBinary(I, ISD::XOR, 0, ISD::VXOR); } 453e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShl(User &I) { visitShift(I, ISD::SHL); } 454e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShr(User &I) { 455e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman visitShift(I, I.getType()->isUnsigned() ? ISD::SRL : ISD::SRA); 4561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetCC(User &I, ISD::CondCode SignedOpc, ISD::CondCode UnsignedOpc); 4591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetEQ(User &I) { visitSetCC(I, ISD::SETEQ, ISD::SETEQ); } 4601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetNE(User &I) { visitSetCC(I, ISD::SETNE, ISD::SETNE); } 4611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLE(User &I) { visitSetCC(I, ISD::SETLE, ISD::SETULE); } 4621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGE(User &I) { visitSetCC(I, ISD::SETGE, ISD::SETUGE); } 4631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLT(User &I) { visitSetCC(I, ISD::SETLT, ISD::SETULT); } 4641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGT(User &I) { visitSetCC(I, ISD::SETGT, ISD::SETUGT); } 4651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 466c7029805ef35ce9805931067b841e6af11db382eChris Lattner void visitExtractElement(ExtractElementInst &I) { assert(0 && "TODO"); } 467c7029805ef35ce9805931067b841e6af11db382eChris Lattner void visitInsertElement(InsertElementInst &I); 468c7029805ef35ce9805931067b841e6af11db382eChris Lattner 4691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitGetElementPtr(User &I); 4701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCast(User &I); 4711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSelect(User &I); 4721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 4731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitMalloc(MallocInst &I); 4751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitFree(FreeInst &I); 4761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAlloca(AllocaInst &I); 4771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitLoad(LoadInst &I); 4781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitStore(StoreInst &I); 4791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitPHI(PHINode &I) { } // PHI nodes are handled specially. 4801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCall(CallInst &I); 481ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner void visitInlineAsm(CallInst &I); 482c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner const char *visitIntrinsicCall(CallInst &I, unsigned Intrinsic); 4831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAStart(CallInst &I); 4851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAArg(VAArgInst &I); 4861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAEnd(CallInst &I); 4871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVACopy(CallInst &I); 48839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner void visitFrameReturnAddress(CallInst &I, bool isFrameAddress); 4891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4907041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner void visitMemIntrinsic(CallInst &I, unsigned Op); 4911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp1(Instruction &I) { 4931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp1 should not exist at instruction selection time!"); 4941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp2(Instruction &I) { 4971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp2 should not exist at instruction selection time!"); 4981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner}; 5011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} // end namespace llvm 5021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 503199862b74973198c2ab5a139f664c86713e7b579Chris LattnerSDOperand SelectionDAGLowering::getValue(const Value *V) { 504199862b74973198c2ab5a139f664c86713e7b579Chris Lattner SDOperand &N = NodeMap[V]; 505199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (N.Val) return N; 506199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 507199862b74973198c2ab5a139f664c86713e7b579Chris Lattner const Type *VTy = V->getType(); 508199862b74973198c2ab5a139f664c86713e7b579Chris Lattner MVT::ValueType VT = TLI.getValueType(VTy); 509199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) { 510199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 511199862b74973198c2ab5a139f664c86713e7b579Chris Lattner visit(CE->getOpcode(), *CE); 512199862b74973198c2ab5a139f664c86713e7b579Chris Lattner assert(N.Val && "visit didn't populate the ValueMap!"); 513199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return N; 514199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) { 515199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return N = DAG.getGlobalAddress(GV, VT); 516199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else if (isa<ConstantPointerNull>(C)) { 517199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return N = DAG.getConstant(0, TLI.getPointerTy()); 518199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else if (isa<UndefValue>(C)) { 51923d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner if (!isa<PackedType>(VTy)) 52023d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner return N = DAG.getNode(ISD::UNDEF, VT); 52123d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner 52223d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner // Create a VConstant of undef nodes. 52323d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner const PackedType *PTy = cast<PackedType>(VTy); 52423d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner unsigned NumElements = PTy->getNumElements(); 52523d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 52623d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner 52723d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner std::vector<SDOperand> Ops; 52823d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner Ops.assign(NumElements, DAG.getNode(ISD::UNDEF, PVT)); 52923d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner 53023d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner // Create a VConstant node with generic Vector type. 53123d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner Ops.push_back(DAG.getConstant(NumElements, MVT::i32)); 53223d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner Ops.push_back(DAG.getValueType(PVT)); 53323d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner return N = DAG.getNode(ISD::VConstant, MVT::Vector, Ops); 534199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 535199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return N = DAG.getConstantFP(CFP->getValue(), VT); 536199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else if (const PackedType *PTy = dyn_cast<PackedType>(VTy)) { 537199862b74973198c2ab5a139f664c86713e7b579Chris Lattner unsigned NumElements = PTy->getNumElements(); 538199862b74973198c2ab5a139f664c86713e7b579Chris Lattner MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 539199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 540199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // Now that we know the number and type of the elements, push a 541199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // Constant or ConstantFP node onto the ops list for each element of 542199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // the packed constant. 543199862b74973198c2ab5a139f664c86713e7b579Chris Lattner std::vector<SDOperand> Ops; 544199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) { 545199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (MVT::isFloatingPoint(PVT)) { 546199862b74973198c2ab5a139f664c86713e7b579Chris Lattner for (unsigned i = 0; i != NumElements; ++i) { 547199862b74973198c2ab5a139f664c86713e7b579Chris Lattner const ConstantFP *El = cast<ConstantFP>(CP->getOperand(i)); 548199862b74973198c2ab5a139f664c86713e7b579Chris Lattner Ops.push_back(DAG.getConstantFP(El->getValue(), PVT)); 549199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 550199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else { 551199862b74973198c2ab5a139f664c86713e7b579Chris Lattner for (unsigned i = 0; i != NumElements; ++i) { 552199862b74973198c2ab5a139f664c86713e7b579Chris Lattner const ConstantIntegral *El = 553199862b74973198c2ab5a139f664c86713e7b579Chris Lattner cast<ConstantIntegral>(CP->getOperand(i)); 554199862b74973198c2ab5a139f664c86713e7b579Chris Lattner Ops.push_back(DAG.getConstant(El->getRawValue(), PVT)); 555199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 556199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 557199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else { 558199862b74973198c2ab5a139f664c86713e7b579Chris Lattner assert(isa<ConstantAggregateZero>(C) && "Unknown packed constant!"); 559199862b74973198c2ab5a139f664c86713e7b579Chris Lattner SDOperand Op; 560199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (MVT::isFloatingPoint(PVT)) 561199862b74973198c2ab5a139f664c86713e7b579Chris Lattner Op = DAG.getConstantFP(0, PVT); 562199862b74973198c2ab5a139f664c86713e7b579Chris Lattner else 563199862b74973198c2ab5a139f664c86713e7b579Chris Lattner Op = DAG.getConstant(0, PVT); 564199862b74973198c2ab5a139f664c86713e7b579Chris Lattner Ops.assign(NumElements, Op); 565199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 566199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 56723d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner // Create a VConstant node with generic Vector type. 56823d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner Ops.push_back(DAG.getConstant(NumElements, MVT::i32)); 56923d564c11fbe628dbebd6d8f09d7d07fa862b719Chris Lattner Ops.push_back(DAG.getValueType(PVT)); 570c7029805ef35ce9805931067b841e6af11db382eChris Lattner return N = DAG.getNode(ISD::VConstant, MVT::Vector, Ops); 571199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else { 572199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // Canonicalize all constant ints to be unsigned. 573199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT); 574199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 575199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 576199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 577199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) { 578199862b74973198c2ab5a139f664c86713e7b579Chris Lattner std::map<const AllocaInst*, int>::iterator SI = 579199862b74973198c2ab5a139f664c86713e7b579Chris Lattner FuncInfo.StaticAllocaMap.find(AI); 580199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (SI != FuncInfo.StaticAllocaMap.end()) 581199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return DAG.getFrameIndex(SI->second, TLI.getPointerTy()); 582199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 583199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 584199862b74973198c2ab5a139f664c86713e7b579Chris Lattner std::map<const Value*, unsigned>::const_iterator VMI = 585199862b74973198c2ab5a139f664c86713e7b579Chris Lattner FuncInfo.ValueMap.find(V); 586199862b74973198c2ab5a139f664c86713e7b579Chris Lattner assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!"); 587199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 588199862b74973198c2ab5a139f664c86713e7b579Chris Lattner unsigned InReg = VMI->second; 589199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 590199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // If this type is not legal, make it so now. 591199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (VT == MVT::Vector) { 592199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // FIXME: We only handle legal vectors right now. We need a VBUILD_VECTOR 593199862b74973198c2ab5a139f664c86713e7b579Chris Lattner const PackedType *PTy = cast<PackedType>(VTy); 594199862b74973198c2ab5a139f664c86713e7b579Chris Lattner unsigned NumElements = PTy->getNumElements(); 595199862b74973198c2ab5a139f664c86713e7b579Chris Lattner MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 596199862b74973198c2ab5a139f664c86713e7b579Chris Lattner MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 597199862b74973198c2ab5a139f664c86713e7b579Chris Lattner assert(TLI.isTypeLegal(TVT) && 598199862b74973198c2ab5a139f664c86713e7b579Chris Lattner "FIXME: Cannot handle illegal vector types here yet!"); 599199862b74973198c2ab5a139f664c86713e7b579Chris Lattner VT = TVT; 600199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 601199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 602199862b74973198c2ab5a139f664c86713e7b579Chris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT); 603199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 604199862b74973198c2ab5a139f664c86713e7b579Chris Lattner N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT); 605199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (DestVT < VT) { 606199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // Source must be expanded. This input value is actually coming from the 607199862b74973198c2ab5a139f664c86713e7b579Chris Lattner // register pair VMI->second and VMI->second+1. 608199862b74973198c2ab5a139f664c86713e7b579Chris Lattner N = DAG.getNode(ISD::BUILD_PAIR, VT, N, 609199862b74973198c2ab5a139f664c86713e7b579Chris Lattner DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT)); 610199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } else { 611199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (DestVT > VT) { // Promotion case 612199862b74973198c2ab5a139f664c86713e7b579Chris Lattner if (MVT::isFloatingPoint(VT)) 613199862b74973198c2ab5a139f664c86713e7b579Chris Lattner N = DAG.getNode(ISD::FP_ROUND, VT, N); 614199862b74973198c2ab5a139f664c86713e7b579Chris Lattner else 615199862b74973198c2ab5a139f664c86713e7b579Chris Lattner N = DAG.getNode(ISD::TRUNCATE, VT, N); 616199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 617199862b74973198c2ab5a139f664c86713e7b579Chris Lattner } 618199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 619199862b74973198c2ab5a139f664c86713e7b579Chris Lattner return N; 620199862b74973198c2ab5a139f664c86713e7b579Chris Lattner} 621199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 622199862b74973198c2ab5a139f664c86713e7b579Chris Lattner 6231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitRet(ReturnInst &I) { 6241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getNumOperands() == 0) { 625a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot())); 6261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; 6271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 628ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman std::vector<SDOperand> NewValues; 629ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman NewValues.push_back(getRoot()); 630ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) { 631ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman SDOperand RetOp = getValue(I.getOperand(i)); 632ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman 633ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // If this is an integer return value, we need to promote it ourselves to 634ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // the full width of a register, since LegalizeOp will use ANY_EXTEND rather 635ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // than sign/zero. 636ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (MVT::isInteger(RetOp.getValueType()) && 637ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp.getValueType() < MVT::i64) { 638ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman MVT::ValueType TmpVT; 639ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (TLI.getTypeAction(MVT::i32) == TargetLowering::Promote) 640ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman TmpVT = TLI.getTypeToTransformTo(MVT::i32); 641ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman else 642ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman TmpVT = MVT::i32; 6431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 644ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (I.getOperand(i)->getType()->isSigned()) 645ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp = DAG.getNode(ISD::SIGN_EXTEND, TmpVT, RetOp); 646ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman else 647ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp = DAG.getNode(ISD::ZERO_EXTEND, TmpVT, RetOp); 648ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman } 649ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman NewValues.push_back(RetOp); 6501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 651ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, NewValues)); 6521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitBr(BranchInst &I) { 6551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Update machine-CFG edges. 6561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[I.getSuccessor(0)]; 6571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Figure out which block is immediately after the current one. 6591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *NextBlock = 0; 6601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction::iterator BBI = CurMBB; 6611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (++BBI != CurMBB->getParent()->end()) 6621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner NextBlock = BBI; 6631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.isUnconditional()) { 6651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is not a fall-through branch, emit the branch. 6661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ0MBB != NextBlock) 667a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, getRoot(), 668dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman DAG.getBasicBlock(Succ0MBB))); 6691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 6701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; 6711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getCondition()); 6731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ1MBB == NextBlock) { 6741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is false, fall through. This means we should branch 6751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // if the condition is true to Succ #0. 676a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 677dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ0MBB))); 6781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (Succ0MBB == NextBlock) { 6791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is true, fall through. This means we should branch if 6801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the condition is false to Succ #1. Invert the condition first. 6811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand True = DAG.getConstant(1, Cond.getValueType()); 6821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 683a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 684dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ1MBB))); 6851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 686e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner std::vector<SDOperand> Ops; 687e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(getRoot()); 688298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // If the false case is the current basic block, then this is a self 689298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // loop. We do not want to emit "Loop: ... brcond Out; br Loop", as it 690298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // adds an extra instruction in the loop. Instead, invert the 691298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // condition and emit "Loop: ... br!cond Loop; br Out. 692298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng if (CurMBB == Succ1MBB) { 693298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng std::swap(Succ0MBB, Succ1MBB); 694298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng SDOperand True = DAG.getConstant(1, Cond.getValueType()); 695298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 696298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng } 69781e8097377529dc3b666f33bb525c49cfbac3f51Nate Begeman SDOperand True = DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), Cond, 69881e8097377529dc3b666f33bb525c49cfbac3f51Nate Begeman DAG.getBasicBlock(Succ0MBB)); 69981e8097377529dc3b666f33bb525c49cfbac3f51Nate Begeman DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, True, 70081e8097377529dc3b666f33bb525c49cfbac3f51Nate Begeman DAG.getBasicBlock(Succ1MBB))); 7011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 705b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattnervoid SelectionDAGLowering::visitSub(User &I) { 706b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner // -0.0 - X --> fneg 70701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (I.getType()->isFloatingPoint()) { 70801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0))) 70901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (CFP->isExactlyValue(-0.0)) { 71001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 71101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2)); 71201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner return; 71301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 71401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 7155fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::SUB, ISD::FSUB, ISD::VSUB); 716b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner} 717b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner 7185fbb5d2459a5410590f285250faa604576308a93Nate Begemanvoid SelectionDAGLowering::visitBinary(User &I, unsigned IntOp, unsigned FPOp, 7195fbb5d2459a5410590f285250faa604576308a93Nate Begeman unsigned VecOp) { 7205fbb5d2459a5410590f285250faa604576308a93Nate Begeman const Type *Ty = I.getType(); 7211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 7221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 7232c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 724b67eb9131c5c04d2e55c6b587fde954619feceafChris Lattner if (Ty->isIntegral()) { 7255fbb5d2459a5410590f285250faa604576308a93Nate Begeman setValue(&I, DAG.getNode(IntOp, Op1.getValueType(), Op1, Op2)); 7265fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else if (Ty->isFloatingPoint()) { 7275fbb5d2459a5410590f285250faa604576308a93Nate Begeman setValue(&I, DAG.getNode(FPOp, Op1.getValueType(), Op1, Op2)); 7285fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else { 7295fbb5d2459a5410590f285250faa604576308a93Nate Begeman const PackedType *PTy = cast<PackedType>(Ty); 730c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand Num = DAG.getConstant(PTy->getNumElements(), MVT::i32); 731c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand Typ = DAG.getValueType(TLI.getValueType(PTy->getElementType())); 732c7029805ef35ce9805931067b841e6af11db382eChris Lattner setValue(&I, DAG.getNode(VecOp, MVT::Vector, Op1, Op2, Num, Typ)); 7335fbb5d2459a5410590f285250faa604576308a93Nate Begeman } 734e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman} 7352c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 736e21ea61588996609f827213a2701a204f2f13fb3Nate Begemanvoid SelectionDAGLowering::visitShift(User &I, unsigned Opcode) { 737e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman SDOperand Op1 = getValue(I.getOperand(0)); 738e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman SDOperand Op2 = getValue(I.getOperand(1)); 739e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman 740e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman Op2 = DAG.getNode(ISD::ANY_EXTEND, TLI.getShiftAmountTy(), Op2); 741e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman 7421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(Opcode, Op1.getValueType(), Op1, Op2)); 7431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSetCC(User &I,ISD::CondCode SignedOpcode, 7461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode UnsignedOpcode) { 7471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 7481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 7491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode Opcode = SignedOpcode; 7501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isUnsigned()) 7511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Opcode = UnsignedOpcode; 7527cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, Op1, Op2, Opcode)); 7531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSelect(User &I) { 7561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getOperand(0)); 7571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand TrueVal = getValue(I.getOperand(1)); 7581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand FalseVal = getValue(I.getOperand(2)); 7591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(ISD::SELECT, TrueVal.getValueType(), Cond, 7601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TrueVal, FalseVal)); 7611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCast(User &I) { 7641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 76528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MVT::ValueType SrcVT = TLI.getValueType(I.getOperand(0)->getType()); 76628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MVT::ValueType DestVT = TLI.getValueType(I.getType()); 7671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 76828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (N.getValueType() == DestVT) { 7691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); // noop cast. 77028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner } else if (DestVT == MVT::i1) { 771ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner // Cast to bool is a comparison against zero, not truncation to zero. 77228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand Zero = isInteger(SrcVT) ? DAG.getConstant(0, N.getValueType()) : 773ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner DAG.getConstantFP(0.0, N.getValueType()); 7747cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, N, Zero, ISD::SETNE)); 77528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner } else if (isInteger(SrcVT)) { 77628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (isInteger(DestVT)) { // Int -> Int cast 77728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (DestVT < SrcVT) // Truncating cast? 77828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::TRUNCATE, DestVT, N)); 779ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else if (I.getOperand(0)->getType()->isSigned()) 78028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::SIGN_EXTEND, DestVT, N)); 781ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 78228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, DestVT, N)); 783ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // Int -> FP cast 784ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getOperand(0)->getType()->isSigned()) 78528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::SINT_TO_FP, DestVT, N)); 786ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 78728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::UINT_TO_FP, DestVT, N)); 788ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 78928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner } else if (isFloatingPoint(SrcVT)) { 79028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (isFloatingPoint(DestVT)) { // FP -> FP cast 79128b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (DestVT < SrcVT) // Rounding cast? 79228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::FP_ROUND, DestVT, N)); 793ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 79428b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::FP_EXTEND, DestVT, N)); 795ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // FP -> Int cast. 796ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getType()->isSigned()) 79728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_SINT, DestVT, N)); 798ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 79928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_UINT, DestVT, N)); 80028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner } 80128b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner } else { 802c7029805ef35ce9805931067b841e6af11db382eChris Lattner assert(0 && "Cannot bitconvert vectors yet!"); 803c7029805ef35ce9805931067b841e6af11db382eChris Lattner#if 0 80428b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner const PackedType *SrcTy = cast<PackedType>(I.getOperand(0)->getType()); 80528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner const PackedType *DstTy = cast<PackedType>(I.getType()); 80628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 80728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner unsigned SrcNumElements = SrcTy->getNumElements(); 80828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MVT::ValueType SrcPVT = TLI.getValueType(SrcTy->getElementType()); 80928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MVT::ValueType SrcTVT = MVT::getVectorType(SrcPVT, SrcNumElements); 81028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 81128b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner unsigned DstNumElements = DstTy->getNumElements(); 81228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MVT::ValueType DstPVT = TLI.getValueType(DstTy->getElementType()); 81328b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MVT::ValueType DstTVT = MVT::getVectorType(DstPVT, DstNumElements); 81428b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 81528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // If the input and output type are legal, convert this to a bit convert of 81628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // the SrcTVT/DstTVT types. 81728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (SrcTVT != MVT::Other && DstTVT != MVT::Other && 81828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner TLI.isTypeLegal(SrcTVT) && TLI.isTypeLegal(DstTVT)) { 81928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner assert(N.getValueType() == SrcTVT); 82028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, DAG.getNode(ISD::BIT_CONVERT, DstTVT, N)); 82128b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner } else { 82228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // Otherwise, convert this directly into a store/load. 82328b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // FIXME: add a VBIT_CONVERT node that we could use to automatically turn 82428b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // 8xFloat -> 8xInt casts into two 4xFloat -> 4xInt casts. 82528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // Create the stack frame object. 82628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner uint64_t ByteSize = TD.getTypeSize(SrcTy); 82728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner assert(ByteSize == TD.getTypeSize(DstTy) && "Not a bit_convert!"); 82828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo(); 82928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner int FrameIdx = FrameInfo->CreateStackObject(ByteSize, ByteSize); 83028b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, TLI.getPointerTy()); 83128b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 83228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // Emit a store to the stack slot. 83328b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(), 83428b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner N, FIPtr, DAG.getSrcValue(NULL)); 83528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner // Result is a load from the stack slot. 83628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand Val = 83728b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner getLoadFrom(DstTy, FIPtr, DAG.getSrcValue(NULL), Store, false); 83828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, Val); 839ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 840c7029805ef35ce9805931067b841e6af11db382eChris Lattner#endif 8411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 844c7029805ef35ce9805931067b841e6af11db382eChris Lattnervoid SelectionDAGLowering::visitInsertElement(InsertElementInst &I) { 845c7029805ef35ce9805931067b841e6af11db382eChris Lattner const PackedType *Ty = cast<PackedType>(I.getType()); 846c7029805ef35ce9805931067b841e6af11db382eChris Lattner unsigned NumElements = Ty->getNumElements(); 847c7029805ef35ce9805931067b841e6af11db382eChris Lattner MVT::ValueType PVT = TLI.getValueType(Ty->getElementType()); 848c7029805ef35ce9805931067b841e6af11db382eChris Lattner MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 849c7029805ef35ce9805931067b841e6af11db382eChris Lattner 850c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand InVec = getValue(I.getOperand(0)); 851c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand InVal = getValue(I.getOperand(1)); 852c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand InIdx = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), 853c7029805ef35ce9805931067b841e6af11db382eChris Lattner getValue(I.getOperand(2))); 854c7029805ef35ce9805931067b841e6af11db382eChris Lattner 855c7029805ef35ce9805931067b841e6af11db382eChris Lattner // Immediately scalarize packed types containing only one element, so that 856c7029805ef35ce9805931067b841e6af11db382eChris Lattner // the Legalize pass does not have to deal with them. Similarly, if the 857c7029805ef35ce9805931067b841e6af11db382eChris Lattner // abstract vector is going to turn into one that the target natively 858c7029805ef35ce9805931067b841e6af11db382eChris Lattner // supports, generate that type now so that Legalize doesn't have to deal 859c7029805ef35ce9805931067b841e6af11db382eChris Lattner // with that either. These steps ensure that Legalize only has to handle 860c7029805ef35ce9805931067b841e6af11db382eChris Lattner // vector types in its Expand case. 861c7029805ef35ce9805931067b841e6af11db382eChris Lattner if (NumElements == 1) { 862c7029805ef35ce9805931067b841e6af11db382eChris Lattner setValue(&I, InVal); // Must be insertelt(Vec, InVal, 0) -> InVal 863c7029805ef35ce9805931067b841e6af11db382eChris Lattner } else if (TVT != MVT::Other && TLI.isTypeLegal(TVT) && 864c7029805ef35ce9805931067b841e6af11db382eChris Lattner TLI.isOperationLegal(ISD::INSERT_VECTOR_ELT, TVT)) { 865c7029805ef35ce9805931067b841e6af11db382eChris Lattner setValue(&I, DAG.getNode(ISD::INSERT_VECTOR_ELT, TVT, InVec, InVal, InIdx)); 866c7029805ef35ce9805931067b841e6af11db382eChris Lattner } else { 867c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand Num = DAG.getConstant(NumElements, MVT::i32); 868c7029805ef35ce9805931067b841e6af11db382eChris Lattner SDOperand Typ = DAG.getValueType(PVT); 869c7029805ef35ce9805931067b841e6af11db382eChris Lattner setValue(&I, DAG.getNode(ISD::VINSERT_VECTOR_ELT, MVT::Vector, 870c7029805ef35ce9805931067b841e6af11db382eChris Lattner InVec, InVal, InIdx, Num, Typ)); 871c7029805ef35ce9805931067b841e6af11db382eChris Lattner } 872c7029805ef35ce9805931067b841e6af11db382eChris Lattner} 873c7029805ef35ce9805931067b841e6af11db382eChris Lattner 874c7029805ef35ce9805931067b841e6af11db382eChris Lattner 8751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitGetElementPtr(User &I) { 8761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 8771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getOperand(0)->getType(); 8781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 8791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (GetElementPtrInst::op_iterator OI = I.op_begin()+1, E = I.op_end(); 8811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner OI != E; ++OI) { 8821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Idx = *OI; 883c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 8841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 8851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Field) { 8861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // N = N + Offset 8871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t Offset = TD.getStructLayout(StTy)->MemberOffsets[Field]; 8881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, 889dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman getIntPtrConstant(Offset)); 8901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = StTy->getElementType(Field); 8921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 8931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 8947c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 8957c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a constant subscript, handle it quickly. 8967c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 8977c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (CI->getRawValue() == 0) continue; 8987c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 8997c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t Offs; 9007c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 9017c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 9027c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 9037c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 9047c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, getIntPtrConstant(Offs)); 9057c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 9067c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } 9077c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 9087c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // N = N + Idx * ElementSize; 9097c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 9107c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand IdxN = getValue(Idx); 9117c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 9127c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If the index is smaller or larger than intptr_t, truncate or extend 9137c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // it. 9147c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (IdxN.getValueType() < N.getValueType()) { 9157c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (Idx->getType()->isSigned()) 9167c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SIGN_EXTEND, N.getValueType(), IdxN); 9177c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 9187c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::ZERO_EXTEND, N.getValueType(), IdxN); 9197c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } else if (IdxN.getValueType() > N.getValueType()) 9207c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::TRUNCATE, N.getValueType(), IdxN); 9217c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 9227c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a multiply by a power of two, turn it into a shl 9237c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // immediately. This is a very common case. 9247c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (isPowerOf2_64(ElementSize)) { 9257c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner unsigned Amt = Log2_64(ElementSize); 9267c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SHL, N.getValueType(), IdxN, 9276b2d69655ace2788b244c8a4ebcfb6f2a926ad92Chris Lattner DAG.getConstant(Amt, TLI.getShiftAmountTy())); 9281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 9297c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 9301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 9317c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 9327c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand Scale = getIntPtrConstant(ElementSize); 9337c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale); 9347c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 9351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 9361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 9371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); 9381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitAlloca(AllocaInst &I) { 9411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is a fixed sized alloca in the entry block of the function, 9421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // allocate it statically on the stack. 9431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (FuncInfo.StaticAllocaMap.count(&I)) 9441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; // getValue will auto-populate this. 9451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getAllocatedType(); 9471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 948ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 949ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman I.getAlignment()); 9501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand AllocSize = getValue(I.getArraySize()); 95268cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 95368cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < AllocSize.getValueType()) 95468cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::TRUNCATE, IntPtr, AllocSize); 95568cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > AllocSize.getValueType()) 95668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, AllocSize); 9571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 95868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::MUL, IntPtr, AllocSize, 9591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(TySize)); 9601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle alignment. If the requested alignment is less than or equal to the 9621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment, ignore it and round the size of the allocation up to the 9631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment size. If the size is greater than the stack alignment, we 9641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // note this in the DYNAMIC_STACKALLOC node. 9651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned StackAlign = 9661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetMachine().getFrameInfo()->getStackAlignment(); 9671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Align <= StackAlign) { 9681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Align = 0; 9691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Add SA-1 to the size. 9701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::ADD, AllocSize.getValueType(), AllocSize, 9711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(StackAlign-1)); 9721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Mask out the low bits for alignment purposes. 9731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::AND, AllocSize.getValueType(), AllocSize, 9741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(~(uint64_t)(StackAlign-1))); 9751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 9761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 977adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<MVT::ValueType> VTs; 978adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(AllocSize.getValueType()); 979adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(MVT::Other); 980adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<SDOperand> Ops; 981adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getRoot()); 982adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(AllocSize); 983adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getIntPtrConstant(Align)); 984adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops); 9851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DAG.setRoot(setValue(&I, DSA).getValue(1)); 9861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Inform the Frame Information that we have just allocated a variable-sized 9881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // object. 9891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurMBB->getParent()->getFrameInfo()->CreateVariableSizedObject(); 9901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitLoad(LoadInst &I) { 9931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(0)); 994edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 995d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root; 996d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 997d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = getRoot(); 998d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else { 999d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Do not serialize non-volatile loads against each other. 1000d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = DAG.getRoot(); 1001d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 100228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 100328b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner setValue(&I, getLoadFrom(I.getType(), Ptr, DAG.getSrcValue(I.getOperand(0)), 100428b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner Root, I.isVolatile())); 100528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner} 100628b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 100728b5b1c7b54c2065882b98af2406c38a3bcee802Chris LattnerSDOperand SelectionDAGLowering::getLoadFrom(const Type *Ty, SDOperand Ptr, 100828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner SDOperand SrcValue, SDOperand Root, 100928b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner bool isVolatile) { 10105fbb5d2459a5410590f285250faa604576308a93Nate Begeman SDOperand L; 10118cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman if (const PackedType *PTy = dyn_cast<PackedType>(Ty)) { 10124ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 1013c7029805ef35ce9805931067b841e6af11db382eChris Lattner L = DAG.getVecLoad(PTy->getNumElements(), PVT, Root, Ptr, SrcValue); 10145fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else { 101528b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner L = DAG.getLoad(TLI.getValueType(Ty), Root, Ptr, SrcValue); 10165fbb5d2459a5410590f285250faa604576308a93Nate Begeman } 1017d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 101828b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner if (isVolatile) 1019d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(L.getValue(1)); 1020d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else 1021d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.push_back(L.getValue(1)); 102228b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner 102328b5b1c7b54c2065882b98af2406c38a3bcee802Chris Lattner return L; 10241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitStore(StoreInst &I) { 10281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *SrcV = I.getOperand(0); 10291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(SrcV); 10301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(1)); 1031369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner DAG.setRoot(DAG.getNode(ISD::STORE, MVT::Other, getRoot(), Src, Ptr, 103206ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(1)))); 10331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1035c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// visitIntrinsicCall - Lower the call to the specified intrinsic function. If 1036c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// we want to emit this as a call to a named external function, return the name 1037c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// otherwise lower it and return null. 1038c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattnerconst char * 1039c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris LattnerSelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { 1040c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner switch (Intrinsic) { 1041c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vastart: visitVAStart(I); return 0; 1042c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vaend: visitVAEnd(I); return 0; 1043c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vacopy: visitVACopy(I); return 0; 1044c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::returnaddress: visitFrameReturnAddress(I, false); return 0; 1045c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::frameaddress: visitFrameReturnAddress(I, true); return 0; 1046c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::setjmp: 1047c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return "_setjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 1048c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner break; 1049c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::longjmp: 1050c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return "_longjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 1051c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner break; 105203dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memcpy_i32: 105303dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memcpy_i64: 105403dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner visitMemIntrinsic(I, ISD::MEMCPY); 105503dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner return 0; 105603dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memset_i32: 105703dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memset_i64: 105803dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner visitMemIntrinsic(I, ISD::MEMSET); 105903dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner return 0; 106003dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memmove_i32: 106103dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memmove_i64: 106203dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner visitMemIntrinsic(I, ISD::MEMMOVE); 106303dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner return 0; 1064c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 106586cb643801be1308ba1da7db774b64852a119e94Chris Lattner case Intrinsic::dbg_stoppoint: { 1066ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey MachineDebugInfo *DebugInfo = DAG.getMachineDebugInfo(); 1067f4321a3a438833dade457e24da6e1e6907cabcd5Jim Laskey if (DebugInfo && DebugInfo->Verify(I.getOperand(3))) { 1068ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey std::vector<SDOperand> Ops; 106936ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner 1070ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // Input Chain 1071ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getRoot()); 1072ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 1073ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // line number 1074f4321a3a438833dade457e24da6e1e6907cabcd5Jim Laskey Ops.push_back(getValue(I.getOperand(1))); 1075ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 1076ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // column 1077f4321a3a438833dade457e24da6e1e6907cabcd5Jim Laskey Ops.push_back(getValue(I.getOperand(2))); 1078ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 1079f4321a3a438833dade457e24da6e1e6907cabcd5Jim Laskey DebugInfoDesc *DD = DebugInfo->getDescFor(I.getOperand(3)); 1080ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey assert(DD && "Not a debug information descriptor"); 1081ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey CompileUnitDesc *CompileUnit = dyn_cast<CompileUnitDesc>(DD); 1082ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey assert(CompileUnit && "Not a compile unit"); 1083ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(DAG.getString(CompileUnit->getFileName())); 1084ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(DAG.getString(CompileUnit->getDirectory())); 1085ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 1086ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey if (Ops.size() == 5) // Found filename/workingdir. 1087ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey DAG.setRoot(DAG.getNode(ISD::LOCATION, MVT::Other, Ops)); 108886cb643801be1308ba1da7db774b64852a119e94Chris Lattner } 108986cb643801be1308ba1da7db774b64852a119e94Chris Lattner 1090d67b3a8bf75d4d3c50263960a9375e6856588f2cChris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1091b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 109236ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner } 1093c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_region_start: 1094b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 1095b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1096b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 1097c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_region_end: 1098b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 1099b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1100b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 1101c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_func_start: 1102b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 1103b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1104b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 1105c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 11060b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::isunordered_f32: 11070b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::isunordered_f64: 1108c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1,getValue(I.getOperand(1)), 1109c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(2)), ISD::SETUO)); 1110c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1111c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 11120b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::sqrt_f32: 11130b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::sqrt_f64: 1114c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::FSQRT, 1115c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1116c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1117c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1118c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::pcmarker: { 1119c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1120c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner DAG.setRoot(DAG.getNode(ISD::PCMARKER, MVT::Other, getRoot(), Tmp)); 1121c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1122c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 11238b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth case Intrinsic::readcyclecounter: { 11248b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth std::vector<MVT::ValueType> VTs; 11258b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth VTs.push_back(MVT::i64); 11268b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth VTs.push_back(MVT::Other); 11278b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth std::vector<SDOperand> Ops; 11288b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth Ops.push_back(getRoot()); 11298b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth SDOperand Tmp = DAG.getNode(ISD::READCYCLECOUNTER, VTs, Ops); 11308b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth setValue(&I, Tmp); 11318b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth DAG.setRoot(Tmp.getValue(1)); 113251b8d54922350b7e1c2cd5a5183ef2c5f5d1b1d5Andrew Lenharth return 0; 11338b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth } 1134d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i16: 1135d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i32: 1136d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i64: 1137d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman setValue(&I, DAG.getNode(ISD::BSWAP, 1138d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman getValue(I.getOperand(1)).getValueType(), 1139d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman getValue(I.getOperand(1)))); 1140d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman return 0; 11410b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i8: 11420b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i16: 11430b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i32: 11440b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i64: 1145c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTTZ, 1146c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1147c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1148c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 11490b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i8: 11500b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i16: 11510b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i32: 11520b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i64: 1153c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTLZ, 1154c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1155c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1156c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 11570b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i8: 11580b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i16: 11590b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i32: 11600b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i64: 1161c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTPOP, 1162c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1163c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1164c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1165140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner case Intrinsic::stacksave: { 1166140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner std::vector<MVT::ValueType> VTs; 1167140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner VTs.push_back(TLI.getPointerTy()); 1168140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner VTs.push_back(MVT::Other); 1169140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner std::vector<SDOperand> Ops; 1170140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner Ops.push_back(getRoot()); 1171140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner SDOperand Tmp = DAG.getNode(ISD::STACKSAVE, VTs, Ops); 1172140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner setValue(&I, Tmp); 1173140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner DAG.setRoot(Tmp.getValue(1)); 1174140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner return 0; 1175140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner } 117639a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner case Intrinsic::stackrestore: { 117739a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 117839a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner DAG.setRoot(DAG.getNode(ISD::STACKRESTORE, MVT::Other, getRoot(), Tmp)); 1179140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner return 0; 118039a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner } 1181ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner case Intrinsic::prefetch: 1182ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner // FIXME: Currently discarding prefetches. 1183ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner return 0; 1184c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner default: 1185c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner std::cerr << I; 1186c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner assert(0 && "This intrinsic is not implemented yet!"); 1187c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1188c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 1189c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner} 1190c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 1191c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 11921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCall(CallInst &I) { 119364e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner const char *RenameFn = 0; 1194c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (Function *F = I.getCalledFunction()) { 1195c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->isExternal()) 1196c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (unsigned IID = F->getIntrinsicID()) { 1197c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner RenameFn = visitIntrinsicCall(I, IID); 1198c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (!RenameFn) 1199c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return; 1200c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else { // Not an LLVM intrinsic. 1201c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner const std::string &Name = F->getName(); 1202a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner if (Name[0] == 'c' && (Name == "copysign" || Name == "copysignf")) { 1203a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner if (I.getNumOperands() == 3 && // Basic sanity checks. 1204a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 1205a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner I.getType() == I.getOperand(1)->getType() && 1206a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner I.getType() == I.getOperand(2)->getType()) { 1207a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner SDOperand LHS = getValue(I.getOperand(1)); 1208a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner SDOperand RHS = getValue(I.getOperand(2)); 1209a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner setValue(&I, DAG.getNode(ISD::FCOPYSIGN, LHS.getValueType(), 1210a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner LHS, RHS)); 1211a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner return; 1212a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner } 1213a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner } else if (Name[0] == 'f' && (Name == "fabs" || Name == "fabsf")) { 1214c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1215c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 1216c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1217c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1218c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner setValue(&I, DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp)); 1219c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 1220c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 1221c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else if (Name[0] == 's' && (Name == "sin" || Name == "sinf")) { 1222f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1223f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 122406a248c9b398049d41cf6dd1a3f9eecc75603401Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1225c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1226f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSIN, Tmp.getValueType(), Tmp)); 1227f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 1228f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1229c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else if (Name[0] == 'c' && (Name == "cos" || Name == "cosf")) { 1230f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1231f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 123206a248c9b398049d41cf6dd1a3f9eecc75603401Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1233c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1234f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FCOS, Tmp.getValueType(), Tmp)); 1235f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 1236f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1237f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1238c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 1239ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner } else if (isa<InlineAsm>(I.getOperand(0))) { 1240ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner visitInlineAsm(I); 1241ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner return; 1242c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 1243edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 124464e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner SDOperand Callee; 124564e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner if (!RenameFn) 124664e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = getValue(I.getOperand(0)); 124764e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner else 124864e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = DAG.getExternalSymbol(RenameFn, TLI.getPointerTy()); 12491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 1250c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner Args.reserve(I.getNumOperands()); 12511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i) { 12521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Arg = I.getOperand(i); 12531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand ArgNode = getValue(Arg); 12541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(ArgNode, Arg->getType())); 12551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1256edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 12578e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const PointerType *PT = cast<PointerType>(I.getCalledValue()->getType()); 12588e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const FunctionType *FTy = cast<FunctionType>(PT->getElementType()); 1259edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1260cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 12619092fa310c8b2b1645b0d448c4c34b1e8ddc131dChris Lattner TLI.LowerCallTo(getRoot(), I.getType(), FTy->isVarArg(), I.getCallingConv(), 1262adf6a965a321372c640845407195594835921eb4Chris Lattner I.isTailCall(), Callee, Args, DAG); 12631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getType() != Type::VoidTy) 1264cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); 1265cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 12661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 12671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1268864635ad7b3046d3042311423071152c613961deChris LattnerSDOperand RegsForValue::getCopyFromRegs(SelectionDAG &DAG, 12699f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner SDOperand &Chain, SDOperand &Flag)const{ 1270864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand Val = DAG.getCopyFromReg(Chain, Regs[0], RegVT, Flag); 1271864635ad7b3046d3042311423071152c613961deChris Lattner Chain = Val.getValue(1); 1272864635ad7b3046d3042311423071152c613961deChris Lattner Flag = Val.getValue(2); 1273864635ad7b3046d3042311423071152c613961deChris Lattner 1274864635ad7b3046d3042311423071152c613961deChris Lattner // If the result was expanded, copy from the top part. 1275864635ad7b3046d3042311423071152c613961deChris Lattner if (Regs.size() > 1) { 1276864635ad7b3046d3042311423071152c613961deChris Lattner assert(Regs.size() == 2 && 1277864635ad7b3046d3042311423071152c613961deChris Lattner "Cannot expand to more than 2 elts yet!"); 1278864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand Hi = DAG.getCopyFromReg(Chain, Regs[1], RegVT, Flag); 1279864635ad7b3046d3042311423071152c613961deChris Lattner Chain = Val.getValue(1); 1280864635ad7b3046d3042311423071152c613961deChris Lattner Flag = Val.getValue(2); 12819f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner if (DAG.getTargetLoweringInfo().isLittleEndian()) 12829f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner return DAG.getNode(ISD::BUILD_PAIR, ValueVT, Val, Hi); 12839f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner else 12849f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner return DAG.getNode(ISD::BUILD_PAIR, ValueVT, Hi, Val); 1285864635ad7b3046d3042311423071152c613961deChris Lattner } 1286864635ad7b3046d3042311423071152c613961deChris Lattner 1287864635ad7b3046d3042311423071152c613961deChris Lattner // Otherwise, if the return value was promoted, truncate it to the 1288864635ad7b3046d3042311423071152c613961deChris Lattner // appropriate type. 1289864635ad7b3046d3042311423071152c613961deChris Lattner if (RegVT == ValueVT) 1290864635ad7b3046d3042311423071152c613961deChris Lattner return Val; 1291864635ad7b3046d3042311423071152c613961deChris Lattner 1292864635ad7b3046d3042311423071152c613961deChris Lattner if (MVT::isInteger(RegVT)) 1293864635ad7b3046d3042311423071152c613961deChris Lattner return DAG.getNode(ISD::TRUNCATE, ValueVT, Val); 1294864635ad7b3046d3042311423071152c613961deChris Lattner else 1295864635ad7b3046d3042311423071152c613961deChris Lattner return DAG.getNode(ISD::FP_ROUND, ValueVT, Val); 1296864635ad7b3046d3042311423071152c613961deChris Lattner} 1297864635ad7b3046d3042311423071152c613961deChris Lattner 1298c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// getCopyToRegs - Emit a series of CopyToReg nodes that copies the 1299c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// specified value into the registers specified by this object. This uses 1300c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// Chain/Flag as the input and updates them for the output Chain/Flag. 1301c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattnervoid RegsForValue::getCopyToRegs(SDOperand Val, SelectionDAG &DAG, 13029f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner SDOperand &Chain, SDOperand &Flag) const { 1303c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (Regs.size() == 1) { 1304c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // If there is a single register and the types differ, this must be 1305c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // a promotion. 1306c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (RegVT != ValueVT) { 1307c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (MVT::isInteger(RegVT)) 1308c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Val = DAG.getNode(ISD::ANY_EXTEND, RegVT, Val); 1309c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner else 1310c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Val = DAG.getNode(ISD::FP_EXTEND, RegVT, Val); 1311c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1312c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Chain = DAG.getCopyToReg(Chain, Regs[0], Val, Flag); 1313c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Flag = Chain.getValue(1); 1314c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } else { 13159f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::vector<unsigned> R(Regs); 13169f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner if (!DAG.getTargetLoweringInfo().isLittleEndian()) 13179f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::reverse(R.begin(), R.end()); 13189f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner 13199f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner for (unsigned i = 0, e = R.size(); i != e; ++i) { 1320c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner SDOperand Part = DAG.getNode(ISD::EXTRACT_ELEMENT, RegVT, Val, 1321c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner DAG.getConstant(i, MVT::i32)); 13229f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner Chain = DAG.getCopyToReg(Chain, R[i], Part, Flag); 1323c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Flag = Chain.getValue(1); 1324c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1325c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1326c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner} 1327864635ad7b3046d3042311423071152c613961deChris Lattner 1328c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// AddInlineAsmOperands - Add this value to the specified inlineasm node 1329c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// operand list. This adds the code marker and includes the number of 1330c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// values added into it. 1331c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattnervoid RegsForValue::AddInlineAsmOperands(unsigned Code, SelectionDAG &DAG, 13329f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::vector<SDOperand> &Ops) const { 1333c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Ops.push_back(DAG.getConstant(Code | (Regs.size() << 3), MVT::i32)); 1334c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner for (unsigned i = 0, e = Regs.size(); i != e; ++i) 1335c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Ops.push_back(DAG.getRegister(Regs[i], RegVT)); 1336c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner} 1337864635ad7b3046d3042311423071152c613961deChris Lattner 1338864635ad7b3046d3042311423071152c613961deChris Lattner/// isAllocatableRegister - If the specified register is safe to allocate, 1339864635ad7b3046d3042311423071152c613961deChris Lattner/// i.e. it isn't a stack pointer or some other special register, return the 1340864635ad7b3046d3042311423071152c613961deChris Lattner/// register class for the register. Otherwise, return null. 1341864635ad7b3046d3042311423071152c613961deChris Lattnerstatic const TargetRegisterClass * 13429b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris LattnerisAllocatableRegister(unsigned Reg, MachineFunction &MF, 13439b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner const TargetLowering &TLI, const MRegisterInfo *MRI) { 13449b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner for (MRegisterInfo::regclass_iterator RCI = MRI->regclass_begin(), 13459b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner E = MRI->regclass_end(); RCI != E; ++RCI) { 13469b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner const TargetRegisterClass *RC = *RCI; 13479b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner // If none of the the value types for this register class are valid, we 13489b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner // can't use it. For example, 64-bit reg classes on 32-bit targets. 13499b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner bool isLegal = false; 13509b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner for (TargetRegisterClass::vt_iterator I = RC->vt_begin(), E = RC->vt_end(); 13519b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner I != E; ++I) { 13529b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner if (TLI.isTypeLegal(*I)) { 13539b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner isLegal = true; 13549b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner break; 13559b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner } 13569b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner } 13579b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner 13589b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner if (!isLegal) continue; 13599b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner 1360864635ad7b3046d3042311423071152c613961deChris Lattner // NOTE: This isn't ideal. In particular, this might allocate the 1361864635ad7b3046d3042311423071152c613961deChris Lattner // frame pointer in functions that need it (due to them not being taken 1362864635ad7b3046d3042311423071152c613961deChris Lattner // out of allocation, because a variable sized allocation hasn't been seen 1363864635ad7b3046d3042311423071152c613961deChris Lattner // yet). This is a slight code pessimization, but should still work. 13649b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner for (TargetRegisterClass::iterator I = RC->allocation_order_begin(MF), 13659b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner E = RC->allocation_order_end(MF); I != E; ++I) 1366864635ad7b3046d3042311423071152c613961deChris Lattner if (*I == Reg) 13679b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner return RC; 1368864635ad7b3046d3042311423071152c613961deChris Lattner } 1369864635ad7b3046d3042311423071152c613961deChris Lattner return 0; 1370864635ad7b3046d3042311423071152c613961deChris Lattner} 1371864635ad7b3046d3042311423071152c613961deChris Lattner 1372864635ad7b3046d3042311423071152c613961deChris LattnerRegsForValue SelectionDAGLowering:: 1373864635ad7b3046d3042311423071152c613961deChris LattnerGetRegistersForValue(const std::string &ConstrCode, 1374864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType VT, bool isOutReg, bool isInReg, 1375864635ad7b3046d3042311423071152c613961deChris Lattner std::set<unsigned> &OutputRegs, 13764e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> &InputRegs) { 1377864635ad7b3046d3042311423071152c613961deChris Lattner std::pair<unsigned, const TargetRegisterClass*> PhysReg = 1378864635ad7b3046d3042311423071152c613961deChris Lattner TLI.getRegForInlineAsmConstraint(ConstrCode, VT); 1379864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<unsigned> Regs; 1380864635ad7b3046d3042311423071152c613961deChris Lattner 1381864635ad7b3046d3042311423071152c613961deChris Lattner unsigned NumRegs = VT != MVT::Other ? TLI.getNumElements(VT) : 1; 1382864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType RegVT; 1383864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType ValueVT = VT; 1384864635ad7b3046d3042311423071152c613961deChris Lattner 1385864635ad7b3046d3042311423071152c613961deChris Lattner if (PhysReg.first) { 1386864635ad7b3046d3042311423071152c613961deChris Lattner if (VT == MVT::Other) 1387864635ad7b3046d3042311423071152c613961deChris Lattner ValueVT = *PhysReg.second->vt_begin(); 1388864635ad7b3046d3042311423071152c613961deChris Lattner RegVT = VT; 1389864635ad7b3046d3042311423071152c613961deChris Lattner 1390864635ad7b3046d3042311423071152c613961deChris Lattner // This is a explicit reference to a physical register. 1391864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(PhysReg.first); 1392864635ad7b3046d3042311423071152c613961deChris Lattner 1393864635ad7b3046d3042311423071152c613961deChris Lattner // If this is an expanded reference, add the rest of the regs to Regs. 1394864635ad7b3046d3042311423071152c613961deChris Lattner if (NumRegs != 1) { 1395864635ad7b3046d3042311423071152c613961deChris Lattner RegVT = *PhysReg.second->vt_begin(); 1396864635ad7b3046d3042311423071152c613961deChris Lattner TargetRegisterClass::iterator I = PhysReg.second->begin(); 1397864635ad7b3046d3042311423071152c613961deChris Lattner TargetRegisterClass::iterator E = PhysReg.second->end(); 1398864635ad7b3046d3042311423071152c613961deChris Lattner for (; *I != PhysReg.first; ++I) 1399864635ad7b3046d3042311423071152c613961deChris Lattner assert(I != E && "Didn't find reg!"); 1400864635ad7b3046d3042311423071152c613961deChris Lattner 1401864635ad7b3046d3042311423071152c613961deChris Lattner // Already added the first reg. 1402864635ad7b3046d3042311423071152c613961deChris Lattner --NumRegs; ++I; 1403864635ad7b3046d3042311423071152c613961deChris Lattner for (; NumRegs; --NumRegs, ++I) { 1404864635ad7b3046d3042311423071152c613961deChris Lattner assert(I != E && "Ran out of registers to allocate!"); 1405864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(*I); 1406864635ad7b3046d3042311423071152c613961deChris Lattner } 1407864635ad7b3046d3042311423071152c613961deChris Lattner } 1408864635ad7b3046d3042311423071152c613961deChris Lattner return RegsForValue(Regs, RegVT, ValueVT); 1409864635ad7b3046d3042311423071152c613961deChris Lattner } 1410864635ad7b3046d3042311423071152c613961deChris Lattner 1411864635ad7b3046d3042311423071152c613961deChris Lattner // This is a reference to a register class. Allocate NumRegs consecutive, 1412864635ad7b3046d3042311423071152c613961deChris Lattner // available, registers from the class. 1413864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<unsigned> RegClassRegs = 1414864635ad7b3046d3042311423071152c613961deChris Lattner TLI.getRegClassForInlineAsmConstraint(ConstrCode, VT); 1415864635ad7b3046d3042311423071152c613961deChris Lattner 14164e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner const MRegisterInfo *MRI = DAG.getTarget().getRegisterInfo(); 14174e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner MachineFunction &MF = *CurMBB->getParent(); 1418864635ad7b3046d3042311423071152c613961deChris Lattner unsigned NumAllocated = 0; 1419864635ad7b3046d3042311423071152c613961deChris Lattner for (unsigned i = 0, e = RegClassRegs.size(); i != e; ++i) { 1420864635ad7b3046d3042311423071152c613961deChris Lattner unsigned Reg = RegClassRegs[i]; 14214e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // See if this register is available. 1422864635ad7b3046d3042311423071152c613961deChris Lattner if ((isOutReg && OutputRegs.count(Reg)) || // Already used. 1423864635ad7b3046d3042311423071152c613961deChris Lattner (isInReg && InputRegs.count(Reg))) { // Already used. 1424864635ad7b3046d3042311423071152c613961deChris Lattner // Make sure we find consecutive registers. 1425864635ad7b3046d3042311423071152c613961deChris Lattner NumAllocated = 0; 1426864635ad7b3046d3042311423071152c613961deChris Lattner continue; 1427864635ad7b3046d3042311423071152c613961deChris Lattner } 1428864635ad7b3046d3042311423071152c613961deChris Lattner 14294e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Check to see if this register is allocatable (i.e. don't give out the 14304e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // stack pointer). 14319b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner const TargetRegisterClass *RC = isAllocatableRegister(Reg, MF, TLI, MRI); 1432864635ad7b3046d3042311423071152c613961deChris Lattner if (!RC) { 1433864635ad7b3046d3042311423071152c613961deChris Lattner // Make sure we find consecutive registers. 1434864635ad7b3046d3042311423071152c613961deChris Lattner NumAllocated = 0; 1435864635ad7b3046d3042311423071152c613961deChris Lattner continue; 14364e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 14374e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 1438864635ad7b3046d3042311423071152c613961deChris Lattner // Okay, this register is good, we can use it. 1439864635ad7b3046d3042311423071152c613961deChris Lattner ++NumAllocated; 1440864635ad7b3046d3042311423071152c613961deChris Lattner 1441864635ad7b3046d3042311423071152c613961deChris Lattner // If we allocated enough consecutive 1442864635ad7b3046d3042311423071152c613961deChris Lattner if (NumAllocated == NumRegs) { 1443864635ad7b3046d3042311423071152c613961deChris Lattner unsigned RegStart = (i-NumAllocated)+1; 1444864635ad7b3046d3042311423071152c613961deChris Lattner unsigned RegEnd = i+1; 1445864635ad7b3046d3042311423071152c613961deChris Lattner // Mark all of the allocated registers used. 1446864635ad7b3046d3042311423071152c613961deChris Lattner for (unsigned i = RegStart; i != RegEnd; ++i) { 1447864635ad7b3046d3042311423071152c613961deChris Lattner unsigned Reg = RegClassRegs[i]; 1448864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(Reg); 1449864635ad7b3046d3042311423071152c613961deChris Lattner if (isOutReg) OutputRegs.insert(Reg); // Mark reg used. 1450864635ad7b3046d3042311423071152c613961deChris Lattner if (isInReg) InputRegs.insert(Reg); // Mark reg used. 1451864635ad7b3046d3042311423071152c613961deChris Lattner } 1452864635ad7b3046d3042311423071152c613961deChris Lattner 1453864635ad7b3046d3042311423071152c613961deChris Lattner return RegsForValue(Regs, *RC->vt_begin(), VT); 1454864635ad7b3046d3042311423071152c613961deChris Lattner } 14554e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 1456864635ad7b3046d3042311423071152c613961deChris Lattner 1457864635ad7b3046d3042311423071152c613961deChris Lattner // Otherwise, we couldn't allocate enough registers for this. 1458864635ad7b3046d3042311423071152c613961deChris Lattner return RegsForValue(); 14594e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner} 14604e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 1461864635ad7b3046d3042311423071152c613961deChris Lattner 1462ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner/// visitInlineAsm - Handle a call to an InlineAsm object. 1463ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner/// 1464ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattnervoid SelectionDAGLowering::visitInlineAsm(CallInst &I) { 1465ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner InlineAsm *IA = cast<InlineAsm>(I.getOperand(0)); 1466ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1467ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand AsmStr = DAG.getTargetExternalSymbol(IA->getAsmString().c_str(), 1468ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner MVT::Other); 1469ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1470ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // Note, we treat inline asms both with and without side-effects as the same. 1471ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // If an inline asm doesn't have side effects and doesn't access memory, we 1472ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // could not choose to not chain it. 1473ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner bool hasSideEffects = IA->hasSideEffects(); 1474ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 14752cc2f66c25d9576743026688fdae5ed402726532Chris Lattner std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints(); 14761efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner std::vector<MVT::ValueType> ConstraintVTs; 1477ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1478ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// AsmNodeOperands - A list of pairs. The first element is a register, the 1479ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// second is a bitfield where bit #0 is set if it is a use and bit #1 is set 1480ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// if it is a def of that register. 1481ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner std::vector<SDOperand> AsmNodeOperands; 1482ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands.push_back(SDOperand()); // reserve space for input chain 1483ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands.push_back(AsmStr); 1484ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1485ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand Chain = getRoot(); 1486ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand Flag; 1487ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 14884e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We fully assign registers here at isel time. This is not optimal, but 14894e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // should work. For register classes that correspond to LLVM classes, we 14904e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // could let the LLVM RA do its thing, but we currently don't. Do a prepass 14914e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // over the constraints, collecting fixed registers that we know we can't use. 14924e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> OutputRegs, InputRegs; 14931efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner unsigned OpNum = 1; 14944e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner for (unsigned i = 0, e = Constraints.size(); i != e; ++i) { 14954e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner assert(Constraints[i].Codes.size() == 1 && "Only handles one code so far!"); 14964e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::string &ConstraintCode = Constraints[i].Codes[0]; 14972223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 14981efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner MVT::ValueType OpVT; 14991efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 15001efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner // Compute the value type for each operand and add it to ConstraintVTs. 15011efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner switch (Constraints[i].Type) { 15021efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isOutput: 15031efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner if (!Constraints[i].isIndirectOutput) { 15041efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner assert(I.getType() != Type::VoidTy && "Bad inline asm!"); 15051efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = TLI.getValueType(I.getType()); 15061efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner } else { 150722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner const Type *OpTy = I.getOperand(OpNum)->getType(); 15081efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = TLI.getValueType(cast<PointerType>(OpTy)->getElementType()); 15091efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpNum++; // Consumes a call operand. 15101efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner } 15111efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 15121efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isInput: 15131efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = TLI.getValueType(I.getOperand(OpNum)->getType()); 15141efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpNum++; // Consumes a call operand. 15151efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 15161efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isClobber: 15171efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = MVT::Other; 15181efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 15191efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner } 15201efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 15211efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner ConstraintVTs.push_back(OpVT); 15221efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 1523864635ad7b3046d3042311423071152c613961deChris Lattner if (TLI.getRegForInlineAsmConstraint(ConstraintCode, OpVT).first == 0) 1524864635ad7b3046d3042311423071152c613961deChris Lattner continue; // Not assigned a fixed reg. 15251efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 1526864635ad7b3046d3042311423071152c613961deChris Lattner // Build a list of regs that this operand uses. This always has a single 1527864635ad7b3046d3042311423071152c613961deChris Lattner // element for promoted/expanded operands. 1528864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue Regs = GetRegistersForValue(ConstraintCode, OpVT, 1529864635ad7b3046d3042311423071152c613961deChris Lattner false, false, 1530864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs, InputRegs); 15314e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 15324e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner switch (Constraints[i].Type) { 15334e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isOutput: 15344e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We can't assign any other output to this register. 1535864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 15364e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // If this is an early-clobber output, it cannot be assigned to the same 15374e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // value as the input reg. 15382223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (Constraints[i].isEarlyClobber || Constraints[i].hasMatchingInput) 1539864635ad7b3046d3042311423071152c613961deChris Lattner InputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 15404e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 15411efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isInput: 15421efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner // We can't assign any other input to this register. 1543864635ad7b3046d3042311423071152c613961deChris Lattner InputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 15441efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 15454e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isClobber: 15464e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Clobbered regs cannot be used as inputs or outputs. 1547864635ad7b3046d3042311423071152c613961deChris Lattner InputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 1548864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 15494e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 15504e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 15514e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 15522cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 15530f0b7d4927e56e622cf43da0db56f3e0d40b8aafChris Lattner // Loop over all of the inputs, copying the operand values into the 15540f0b7d4927e56e622cf43da0db56f3e0d40b8aafChris Lattner // appropriate registers and processing the output regs. 1555864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue RetValRegs; 1556864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<std::pair<RegsForValue, Value*> > IndirectStoresToEmit; 15571efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpNum = 1; 15580f0b7d4927e56e622cf43da0db56f3e0d40b8aafChris Lattner 15596656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = Constraints.size(); i != e; ++i) { 15602cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(Constraints[i].Codes.size() == 1 && "Only handles one code so far!"); 15612cc2f66c25d9576743026688fdae5ed402726532Chris Lattner std::string &ConstraintCode = Constraints[i].Codes[0]; 15621efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 15632cc2f66c25d9576743026688fdae5ed402726532Chris Lattner switch (Constraints[i].Type) { 15642cc2f66c25d9576743026688fdae5ed402726532Chris Lattner case InlineAsm::isOutput: { 156522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner TargetLowering::ConstraintType CTy = TargetLowering::C_RegisterClass; 156622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (ConstraintCode.size() == 1) // not a physreg name. 156722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner CTy = TLI.getConstraintType(ConstraintCode[0]); 156822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 156922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (CTy == TargetLowering::C_Memory) { 157022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Memory output. 157122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner SDOperand InOperandVal = getValue(I.getOperand(OpNum)); 157222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 157322873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Check that the operand (the address to store to) isn't a float. 157422873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (!MVT::isInteger(InOperandVal.getValueType())) 157522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner assert(0 && "MATCH FAIL!"); 157622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 157722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (!Constraints[i].isIndirectOutput) 157822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner assert(0 && "MATCH FAIL!"); 157922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 158022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner OpNum++; // Consumes a call operand. 158122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 158222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Extend/truncate to the right pointer type if needed. 158322873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner MVT::ValueType PtrType = TLI.getPointerTy(); 158422873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (InOperandVal.getValueType() < PtrType) 158522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner InOperandVal = DAG.getNode(ISD::ZERO_EXTEND, PtrType, InOperandVal); 158622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner else if (InOperandVal.getValueType() > PtrType) 158722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner InOperandVal = DAG.getNode(ISD::TRUNCATE, PtrType, InOperandVal); 158822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 158922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Add information to the INLINEASM node to know about this output. 159022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner unsigned ResOpType = 4/*MEM*/ | (1 << 3); 159122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 159222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner AsmNodeOperands.push_back(InOperandVal); 159322873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner break; 159422873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner } 159522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 159622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Otherwise, this is a register output. 159722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner assert(CTy == TargetLowering::C_RegisterClass && "Unknown op type!"); 159822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 1599864635ad7b3046d3042311423071152c613961deChris Lattner // If this is an early-clobber output, or if there is an input 1600864635ad7b3046d3042311423071152c613961deChris Lattner // constraint that matches this, we need to reserve the input register 1601864635ad7b3046d3042311423071152c613961deChris Lattner // so no other inputs allocate to it. 1602864635ad7b3046d3042311423071152c613961deChris Lattner bool UsesInputRegister = false; 1603864635ad7b3046d3042311423071152c613961deChris Lattner if (Constraints[i].isEarlyClobber || Constraints[i].hasMatchingInput) 1604864635ad7b3046d3042311423071152c613961deChris Lattner UsesInputRegister = true; 16052223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 1606864635ad7b3046d3042311423071152c613961deChris Lattner // Copy the output from the appropriate register. Find a register that 1607864635ad7b3046d3042311423071152c613961deChris Lattner // we can use. 1608864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue Regs = 1609864635ad7b3046d3042311423071152c613961deChris Lattner GetRegistersForValue(ConstraintCode, ConstraintVTs[i], 1610864635ad7b3046d3042311423071152c613961deChris Lattner true, UsesInputRegister, 1611864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs, InputRegs); 1612864635ad7b3046d3042311423071152c613961deChris Lattner assert(!Regs.Regs.empty() && "Couldn't allocate output reg!"); 16132cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 16142cc2f66c25d9576743026688fdae5ed402726532Chris Lattner if (!Constraints[i].isIndirectOutput) { 1615864635ad7b3046d3042311423071152c613961deChris Lattner assert(RetValRegs.Regs.empty() && 16162cc2f66c25d9576743026688fdae5ed402726532Chris Lattner "Cannot have multiple output constraints yet!"); 16172cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(I.getType() != Type::VoidTy && "Bad inline asm!"); 1618864635ad7b3046d3042311423071152c613961deChris Lattner RetValRegs = Regs; 16192cc2f66c25d9576743026688fdae5ed402726532Chris Lattner } else { 162022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner IndirectStoresToEmit.push_back(std::make_pair(Regs, 162122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner I.getOperand(OpNum))); 16222cc2f66c25d9576743026688fdae5ed402726532Chris Lattner OpNum++; // Consumes a call operand. 16232cc2f66c25d9576743026688fdae5ed402726532Chris Lattner } 16246656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 16256656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Add information to the INLINEASM node to know that this register is 16266656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // set. 1627c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Regs.AddInlineAsmOperands(2 /*REGDEF*/, DAG, AsmNodeOperands); 16286656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 16296656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 16306656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner case InlineAsm::isInput: { 163122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner SDOperand InOperandVal = getValue(I.getOperand(OpNum)); 16324e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner OpNum++; // Consumes a call operand. 16333d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 16342223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (isdigit(ConstraintCode[0])) { // Matching constraint? 16352223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // If this is required to match an output register we have already set, 16362223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // just use its register. 16372223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner unsigned OperandNo = atoi(ConstraintCode.c_str()); 16383d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 1639c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Scan until we find the definition we already emitted of this operand. 1640c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // When we find it, create a RegsForValue operand. 1641c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned CurOp = 2; // The first operand. 1642c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner for (; OperandNo; --OperandNo) { 1643c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Advance to the next operand. 1644c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned NumOps = 1645c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner cast<ConstantSDNode>(AsmNodeOperands[CurOp])->getValue(); 1646c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner assert((NumOps & 7) == 2 /*REGDEF*/ && 1647c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner "Skipped past definitions?"); 1648c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner CurOp += (NumOps>>3)+1; 1649c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1650c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 1651c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned NumOps = 1652c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner cast<ConstantSDNode>(AsmNodeOperands[CurOp])->getValue(); 1653c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner assert((NumOps & 7) == 2 /*REGDEF*/ && 1654c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner "Skipped past definitions?"); 1655c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 1656c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Add NumOps>>3 registers to MatchedRegs. 1657c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner RegsForValue MatchedRegs; 1658c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.ValueVT = InOperandVal.getValueType(); 1659c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.RegVT = AsmNodeOperands[CurOp+1].getValueType(); 1660c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner for (unsigned i = 0, e = NumOps>>3; i != e; ++i) { 1661c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned Reg=cast<RegisterSDNode>(AsmNodeOperands[++CurOp])->getReg(); 1662c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.Regs.push_back(Reg); 1663c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1664c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 1665c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Use the produced MatchedRegs object to 1666c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.getCopyToRegs(InOperandVal, DAG, Chain, Flag); 1667c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.AddInlineAsmOperands(1 /*REGUSE*/, DAG, AsmNodeOperands); 166887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner break; 166987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner } 167087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 167187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner TargetLowering::ConstraintType CTy = TargetLowering::C_RegisterClass; 167287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (ConstraintCode.size() == 1) // not a physreg name. 167387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner CTy = TLI.getConstraintType(ConstraintCode[0]); 16743d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 167587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (CTy == TargetLowering::C_Other) { 167687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (!TLI.isOperandValidForConstraint(InOperandVal, ConstraintCode[0])) 167787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(0 && "MATCH FAIL!"); 1678c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 167987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Add information to the INLINEASM node to know about this input. 168087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner unsigned ResOpType = 3 /*IMM*/ | (1 << 3); 168187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 168287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(InOperandVal); 168387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner break; 168487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner } else if (CTy == TargetLowering::C_Memory) { 168587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Memory input. 168687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 168787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Check that the operand isn't a float. 168887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (!MVT::isInteger(InOperandVal.getValueType())) 168987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(0 && "MATCH FAIL!"); 1690c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 169187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Extend/truncate to the right pointer type if needed. 169287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner MVT::ValueType PtrType = TLI.getPointerTy(); 169387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (InOperandVal.getValueType() < PtrType) 169487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InOperandVal = DAG.getNode(ISD::ZERO_EXTEND, PtrType, InOperandVal); 169587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner else if (InOperandVal.getValueType() > PtrType) 169687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InOperandVal = DAG.getNode(ISD::TRUNCATE, PtrType, InOperandVal); 169787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 169887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Add information to the INLINEASM node to know about this input. 169987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner unsigned ResOpType = 4/*MEM*/ | (1 << 3); 170087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 170187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(InOperandVal); 1702c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner break; 17032223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner } 170487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 170587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(CTy == TargetLowering::C_RegisterClass && "Unknown op type!"); 170687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 170787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Copy the input into the appropriate registers. 170887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner RegsForValue InRegs = 170987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner GetRegistersForValue(ConstraintCode, ConstraintVTs[i], 171087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner false, true, OutputRegs, InputRegs); 171187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // FIXME: should be match fail. 171287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(!InRegs.Regs.empty() && "Couldn't allocate input reg!"); 171387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 171487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InRegs.getCopyToRegs(InOperandVal, DAG, Chain, Flag); 171587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 171687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InRegs.AddInlineAsmOperands(1/*REGUSE*/, DAG, AsmNodeOperands); 17176656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 17186656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1719c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner case InlineAsm::isClobber: { 1720c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner RegsForValue ClobberedRegs = 1721c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner GetRegistersForValue(ConstraintCode, MVT::Other, false, false, 1722c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner OutputRegs, InputRegs); 1723c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Add the clobbered value to the operand list, so that the register 1724c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // allocator is aware that the physreg got clobbered. 1725c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (!ClobberedRegs.Regs.empty()) 1726c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner ClobberedRegs.AddInlineAsmOperands(2/*REGDEF*/, DAG, AsmNodeOperands); 17276656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 17286656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1729c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 17306656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1731ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1732ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // Finish up input operands. 1733ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands[0] = Chain; 1734ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner if (Flag.Val) AsmNodeOperands.push_back(Flag); 1735ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1736ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner std::vector<MVT::ValueType> VTs; 1737ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner VTs.push_back(MVT::Other); 1738ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner VTs.push_back(MVT::Flag); 1739ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner Chain = DAG.getNode(ISD::INLINEASM, VTs, AsmNodeOperands); 1740ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner Flag = Chain.getValue(1); 1741ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 17426656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // If this asm returns a register value, copy the result from that register 17436656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // and set it as the value of the call. 1744864635ad7b3046d3042311423071152c613961deChris Lattner if (!RetValRegs.Regs.empty()) 1745864635ad7b3046d3042311423071152c613961deChris Lattner setValue(&I, RetValRegs.getCopyFromRegs(DAG, Chain, Flag)); 17466656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 17476656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<std::pair<SDOperand, Value*> > StoresToEmit; 17486656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 17496656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Process indirect outputs, first output all of the flagged copies out of 17506656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // physregs. 17516656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = IndirectStoresToEmit.size(); i != e; ++i) { 1752864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue &OutRegs = IndirectStoresToEmit[i].first; 17536656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Value *Ptr = IndirectStoresToEmit[i].second; 1754864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand OutVal = OutRegs.getCopyFromRegs(DAG, Chain, Flag); 1755864635ad7b3046d3042311423071152c613961deChris Lattner StoresToEmit.push_back(std::make_pair(OutVal, Ptr)); 17566656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1757ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 17586656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Emit the non-flagged stores from the physregs. 17596656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<SDOperand> OutChains; 17606656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = StoresToEmit.size(); i != e; ++i) 17616656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner OutChains.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, 17626656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner StoresToEmit[i].first, 17636656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner getValue(StoresToEmit[i].second), 17646656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner DAG.getSrcValue(StoresToEmit[i].second))); 17656656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner if (!OutChains.empty()) 17666656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains); 1767ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner DAG.setRoot(Chain); 1768ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner} 1769ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1770ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 17711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitMalloc(MallocInst &I) { 17721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(I.getOperand(0)); 17731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 177568cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner 177668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < Src.getValueType()) 177768cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::TRUNCATE, IntPtr, Src); 177868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > Src.getValueType()) 177968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Src); 17801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Scale the source by the type size. 17821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t ElementSize = TD.getTypeSize(I.getType()->getElementType()); 17831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src = DAG.getNode(ISD::MUL, Src.getValueType(), 17841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src, getIntPtrConstant(ElementSize)); 17851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 17871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(Src, TLI.getTargetData().getIntPtrType())); 1788cf5734dddd66af9388a171b44996505ede47feedChris Lattner 1789cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 1790adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), I.getType(), false, CallingConv::C, true, 1791cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("malloc", IntPtr), 1792cf5734dddd66af9388a171b44996505ede47feedChris Lattner Args, DAG); 1793cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); // Pointers always fit in registers 1794cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 17951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitFree(FreeInst &I) { 17981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 17991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(getValue(I.getOperand(0)), 18001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetData().getIntPtrType())); 18011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 1802cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 1803adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), Type::VoidTy, false, CallingConv::C, true, 1804cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("free", IntPtr), Args, DAG); 1805cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 18061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 18071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1808025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// InsertAtEndOfBasicBlock - This method should be implemented by targets that 1809025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// mark instructions with the 'usesCustomDAGSchedInserter' flag. These 1810025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// instructions are special in various ways, which require special support to 1811025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// insert. The specified MachineInstr is created but not inserted into any 1812025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// basic blocks, and the scheduler passes ownership of it to this method. 1813025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris LattnerMachineBasicBlock *TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI, 1814025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner MachineBasicBlock *MBB) { 1815025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner std::cerr << "If a target marks an instruction with " 1816025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "'usesCustomDAGSchedInserter', it must implement " 1817025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "TargetLowering::InsertAtEndOfBasicBlock!\n"; 1818025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner abort(); 1819025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner return 0; 1820025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner} 1821025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner 182239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitVAStart(CallInst &I) { 1823acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VASTART, MVT::Other, getRoot(), 1824acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1825acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)))); 182639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 182739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 18281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAArg(VAArgInst &I) { 1829acc398c195a697795bff3245943d104eb19192b9Nate Begeman SDOperand V = DAG.getVAArg(TLI.getValueType(I.getType()), getRoot(), 1830acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(0)), 1831acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(0))); 1832acc398c195a697795bff3245943d104eb19192b9Nate Begeman setValue(&I, V); 1833acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(V.getValue(1)); 18341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 18351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 18361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAEnd(CallInst &I) { 1837acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VAEND, MVT::Other, getRoot(), 1838acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1839acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)))); 18401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 18411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 18421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVACopy(CallInst &I) { 1843acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VACOPY, MVT::Other, getRoot(), 1844acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1845acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(2)), 1846acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)), 1847acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(2)))); 18481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 18491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 185039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// It is always conservatively correct for llvm.returnaddress and 185139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// llvm.frameaddress to return 0. 185239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand, SDOperand> 185339ae3622791986a0232f7e4797b633f8fa9e54d2Chris LattnerTargetLowering::LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, 185439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth, SelectionDAG &DAG) { 185539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return std::make_pair(DAG.getConstant(0, getPointerTy()), Chain); 18561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 18571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 185850381b6c4180e9a2b983d4623da2e485cd768632Chris LattnerSDOperand TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { 1859171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner assert(0 && "LowerOperation not implemented for this target!"); 1860171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner abort(); 1861d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return SDOperand(); 1862171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner} 1863171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner 18640aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate BegemanSDOperand TargetLowering::CustomPromoteOperation(SDOperand Op, 18650aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman SelectionDAG &DAG) { 18660aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman assert(0 && "CustomPromoteOperation not implemented for this target!"); 18670aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman abort(); 18680aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman return SDOperand(); 18690aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman} 18700aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman 187139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitFrameReturnAddress(CallInst &I, bool isFrame) { 187239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth = (unsigned)cast<ConstantUInt>(I.getOperand(1))->getValue(); 187339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 1874a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner TLI.LowerFrameReturnAddress(isFrame, getRoot(), Depth, DAG); 187539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 187639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 187739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 18781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 187974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// getMemsetValue - Vectorized representation of the memset value 18801db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng/// operand. 18811db92f947cc600dee5edb9305a4e0f1c5c872965Evan Chengstatic SDOperand getMemsetValue(SDOperand Value, MVT::ValueType VT, 1882a47876d87a84fa94bf9f09cfef6756223575611dEvan Cheng SelectionDAG &DAG) { 18831db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType CurVT = VT; 18841db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Value)) { 18851db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng uint64_t Val = C->getValue() & 255; 18861db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Shift = 8; 18871db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (CurVT != MVT::i8) { 18881db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Val = (Val << Shift) | Val; 18891db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Shift <<= 1; 18901db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng CurVT = (MVT::ValueType)((unsigned)CurVT - 1); 18911db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 18921db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return DAG.getConstant(Val, VT); 18931db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } else { 18941db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Value = DAG.getNode(ISD::ZERO_EXTEND, VT, Value); 18951db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Shift = 8; 18961db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (CurVT != MVT::i8) { 18971db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Value = 18981db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getNode(ISD::OR, VT, 18991db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getNode(ISD::SHL, VT, Value, 19001db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getConstant(Shift, MVT::i8)), Value); 19011db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Shift <<= 1; 19021db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng CurVT = (MVT::ValueType)((unsigned)CurVT - 1); 19031db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19041db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19051db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return Value; 19061db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19071db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 19081db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 190974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// getMemsetStringVal - Similar to getMemsetValue. Except this is only 191074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// used when a memcpy is turned into a memset when the source is a constant 191174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// string ptr. 191274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Chengstatic SDOperand getMemsetStringVal(MVT::ValueType VT, 191374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SelectionDAG &DAG, TargetLowering &TLI, 191474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string &Str, unsigned Offset) { 191574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng MVT::ValueType CurVT = VT; 191674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng uint64_t Val = 0; 191774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng unsigned MSB = getSizeInBits(VT) / 8; 191874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (TLI.isLittleEndian()) 191974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Offset = Offset + MSB - 1; 192074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng for (unsigned i = 0; i != MSB; ++i) { 192174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Val = (Val << 8) | Str[Offset]; 192274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Offset += TLI.isLittleEndian() ? -1 : 1; 192374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 192474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng return DAG.getConstant(Val, VT); 192574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng} 192674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 19271db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng/// getMemBasePlusOffset - Returns base and offset node for the 19281db92f947cc600dee5edb9305a4e0f1c5c872965Evan Chengstatic SDOperand getMemBasePlusOffset(SDOperand Base, unsigned Offset, 19291db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SelectionDAG &DAG, TargetLowering &TLI) { 19301db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT = Base.getValueType(); 19311db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return DAG.getNode(ISD::ADD, VT, Base, DAG.getConstant(Offset, VT)); 19321db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 19331db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 1934c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng/// MeetsMaxMemopRequirement - Determines if the number of memory ops required 193580e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng/// to replace the memset / memcpy is below the threshold. It also returns the 193680e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng/// types of the sequence of memory ops to perform memset / memcpy. 1937c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Chengstatic bool MeetsMaxMemopRequirement(std::vector<MVT::ValueType> &MemOps, 1938c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng unsigned Limit, uint64_t Size, 1939c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng unsigned Align, TargetLowering &TLI) { 19401db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT; 19411db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19421db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (TLI.allowsUnalignedMemoryAccesses()) { 19431db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i64; 19441db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } else { 19451db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng switch (Align & 7) { 19461db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 0: 19471db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i64; 19481db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 19491db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 4: 19501db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i32; 19511db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 19521db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 2: 19531db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i16; 19541db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 19551db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng default: 19561db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i8; 19571db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 19581db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19591db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19601db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 196180e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng MVT::ValueType LVT = MVT::i64; 196280e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng while (!TLI.isTypeLegal(LVT)) 196380e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng LVT = (MVT::ValueType)((unsigned)LVT - 1); 196480e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng assert(MVT::isInteger(LVT)); 19651db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 196680e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng if (VT > LVT) 196780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng VT = LVT; 196880e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 1969dea7245997f37972ed2f94d4ca1ec50c5af5000aEvan Cheng unsigned NumMemOps = 0; 19701db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (Size != 0) { 19711db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 19721db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (VTSize > Size) { 19731db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = (MVT::ValueType)((unsigned)VT - 1); 19741db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VTSize >>= 1; 19751db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 197680e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng assert(MVT::isInteger(VT)); 197780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 197880e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng if (++NumMemOps > Limit) 197980e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng return false; 19801db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MemOps.push_back(VT); 19811db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Size -= VTSize; 19821db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 198380e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 198480e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng return true; 19851db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 19861db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19877041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattnervoid SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) { 19881db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op1 = getValue(I.getOperand(1)); 19891db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op2 = getValue(I.getOperand(2)); 19901db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op3 = getValue(I.getOperand(3)); 19911db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op4 = getValue(I.getOperand(4)); 19921db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Align = (unsigned)cast<ConstantSDNode>(Op4)->getValue(); 19931db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (Align == 0) Align = 1; 19941db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19951db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (ConstantSDNode *Size = dyn_cast<ConstantSDNode>(Op3)) { 19961db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng std::vector<MVT::ValueType> MemOps; 19971db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19981db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng // Expand memset / memcpy to a series of load / store ops 19991db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng // if the size operand falls below a certain threshold. 20001db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng std::vector<SDOperand> OutChains; 20011db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng switch (Op) { 2002ac940ab1bf21be40f74a83b202419a20ad2e279fEvan Cheng default: break; // Do nothing for now. 20031db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case ISD::MEMSET: { 2004c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemset(), 2005c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng Size->getValue(), Align, TLI)) { 200680e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng unsigned NumMemOps = MemOps.size(); 20071db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Offset = 0; 20081db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng for (unsigned i = 0; i < NumMemOps; i++) { 20091db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT = MemOps[i]; 20101db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 2011a47876d87a84fa94bf9f09cfef6756223575611dEvan Cheng SDOperand Value = getMemsetValue(Op2, VT, DAG); 2012c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, getRoot(), 2013c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Value, 2014864635ad7b3046d3042311423071152c613961deChris Lattner getMemBasePlusOffset(Op1, Offset, DAG, TLI), 2015864635ad7b3046d3042311423071152c613961deChris Lattner DAG.getSrcValue(I.getOperand(1), Offset)); 2016c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng OutChains.push_back(Store); 2017c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Offset += VTSize; 2018c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 2019c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 2020c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng break; 2021c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 2022c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng case ISD::MEMCPY: { 2023c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemcpy(), 2024c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Size->getValue(), Align, TLI)) { 2025c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng unsigned NumMemOps = MemOps.size(); 2026cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng unsigned SrcOff = 0, DstOff = 0, SrcDelta = 0; 202774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng GlobalAddressSDNode *G = NULL; 202874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string Str; 2029cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng bool CopyFromStr = false; 203074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 203174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (Op2.getOpcode() == ISD::GlobalAddress) 203274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng G = cast<GlobalAddressSDNode>(Op2); 203374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng else if (Op2.getOpcode() == ISD::ADD && 203474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Op2.getOperand(0).getOpcode() == ISD::GlobalAddress && 203574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Op2.getOperand(1).getOpcode() == ISD::Constant) { 203674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng G = cast<GlobalAddressSDNode>(Op2.getOperand(0)); 2037cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng SrcDelta = cast<ConstantSDNode>(Op2.getOperand(1))->getValue(); 203874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 203974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (G) { 204074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng GlobalVariable *GV = dyn_cast<GlobalVariable>(G->getGlobal()); 2041cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng if (GV) { 20420937103368992af8d3d8032d31a7d152aeae32d5Evan Cheng Str = GV->getStringValue(false); 2043cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng if (!Str.empty()) { 2044cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng CopyFromStr = true; 2045cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng SrcOff += SrcDelta; 2046cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng } 2047cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng } 204874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 204974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 2050c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng for (unsigned i = 0; i < NumMemOps; i++) { 2051c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng MVT::ValueType VT = MemOps[i]; 2052c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 205374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SDOperand Value, Chain, Store; 205474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 2055cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng if (CopyFromStr) { 205674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Value = getMemsetStringVal(VT, DAG, TLI, Str, SrcOff); 205774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Chain = getRoot(); 205874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Store = 205974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, 206074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op1, DstOff, DAG, TLI), 206174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(1), DstOff)); 206274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } else { 206374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Value = DAG.getLoad(VT, getRoot(), 206474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op2, SrcOff, DAG, TLI), 206574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(2), SrcOff)); 206674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Chain = Value.getValue(1); 206774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Store = 206874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, 206974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op1, DstOff, DAG, TLI), 207074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(1), DstOff)); 207174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 2072c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng OutChains.push_back(Store); 207374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SrcOff += VTSize; 207474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DstOff += VTSize; 20751db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 20761db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 2077c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng break; 20781db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 20791db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 2080c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng 2081c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng if (!OutChains.empty()) { 2082c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains)); 2083c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng return; 2084c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 20851db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 20861db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 20877041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner std::vector<SDOperand> Ops; 2088a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner Ops.push_back(getRoot()); 20891db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op1); 20901db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op2); 20911db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op3); 20921db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op4); 20937041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner DAG.setRoot(DAG.getNode(Op, MVT::Other, Ops)); 20941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 20951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20967041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 20977041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner// SelectionDAGISel code 20987041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 20991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerunsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) { 21011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 21021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 21031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2104495a0b51915eb763576874f29192820b731edc22Chris Lattnervoid SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const { 210536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // FIXME: we only modify the CFG to split critical edges. This 210636b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // updates dom and loop info. 2107495a0b51915eb763576874f29192820b731edc22Chris Lattner} 21081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2109c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2110c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// InsertGEPComputeCode - Insert code into BB to compute Ptr+PtrOffset, 2111c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// casting to the type of GEPI. 2112c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattnerstatic Value *InsertGEPComputeCode(Value *&V, BasicBlock *BB, Instruction *GEPI, 2113c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Ptr, Value *PtrOffset) { 2114c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (V) return V; // Already computed. 2115c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2116c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock::iterator InsertPt; 2117c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (BB == GEPI->getParent()) { 2118c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If insert into the GEP's block, insert right after the GEP. 2119c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner InsertPt = GEPI; 2120c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ++InsertPt; 2121c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } else { 2122c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Otherwise, insert at the top of BB, after any PHI nodes 2123c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner InsertPt = BB->begin(); 2124c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner while (isa<PHINode>(InsertPt)) ++InsertPt; 2125c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2126c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2127c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // If Ptr is itself a cast, but in some other BB, emit a copy of the cast into 2128c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // BB so that there is only one value live across basic blocks (the cast 2129c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // operand). 2130c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (CastInst *CI = dyn_cast<CastInst>(Ptr)) 2131c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (CI->getParent() != BB && isa<PointerType>(CI->getOperand(0)->getType())) 2132c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Ptr = new CastInst(CI->getOperand(0), CI->getType(), "", InsertPt); 2133c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 2134c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Add the offset, cast it to the right type. 2135c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = BinaryOperator::createAdd(Ptr, PtrOffset, "", InsertPt); 2136c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = new CastInst(Ptr, GEPI->getType(), "", InsertPt); 2137c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner return V = Ptr; 2138c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner} 2139c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2140c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2141c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// OptimizeGEPExpression - Since we are doing basic-block-at-a-time instruction 2142c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// selection, we want to be a bit careful about some things. In particular, if 2143c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// we have a GEP instruction that is used in a different block than it is 2144c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// defined, the addressing expression of the GEP cannot be folded into loads or 2145c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// stores that use it. In this case, decompose the GEP and move constant 2146c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// indices into blocks that use it. 2147c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattnerstatic void OptimizeGEPExpression(GetElementPtrInst *GEPI, 2148c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const TargetData &TD) { 2149c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If this GEP is only used inside the block it is defined in, there is no 2150c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // need to rewrite it. 2151c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner bool isUsedOutsideDefBB = false; 2152c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock *DefBB = GEPI->getParent(); 2153c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (Value::use_iterator UI = GEPI->use_begin(), E = GEPI->use_end(); 2154c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner UI != E; ++UI) { 2155c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (cast<Instruction>(*UI)->getParent() != DefBB) { 2156c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner isUsedOutsideDefBB = true; 2157c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner break; 2158c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2159c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2160c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (!isUsedOutsideDefBB) return; 2161c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2162c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If this GEP has no non-zero constant indices, there is nothing we can do, 2163c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // ignore it. 2164c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner bool hasConstantIndex = false; 2165c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (GetElementPtrInst::op_iterator OI = GEPI->op_begin()+1, 2166c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner E = GEPI->op_end(); OI != E; ++OI) { 2167c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(*OI)) 2168c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (CI->getRawValue()) { 2169c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner hasConstantIndex = true; 2170c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner break; 2171c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2172c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 21733802c2552fe4475418db3c948e7601d7259f996dChris Lattner // If this is a GEP &Alloca, 0, 0, forward subst the frame index into uses. 21743802c2552fe4475418db3c948e7601d7259f996dChris Lattner if (!hasConstantIndex && !isa<AllocaInst>(GEPI->getOperand(0))) return; 2175c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2176c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Otherwise, decompose the GEP instruction into multiplies and adds. Sum the 2177c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // constant offset (which we now know is non-zero) and deal with it later. 2178c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner uint64_t ConstantOffset = 0; 2179c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 2180c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Ptr = new CastInst(GEPI->getOperand(0), UIntPtrTy, "", GEPI); 2181c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const Type *Ty = GEPI->getOperand(0)->getType(); 2182c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2183c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (GetElementPtrInst::op_iterator OI = GEPI->op_begin()+1, 2184c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner E = GEPI->op_end(); OI != E; ++OI) { 2185c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Idx = *OI; 2186c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 2187c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 2188c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (Field) 2189c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset += TD.getStructLayout(StTy)->MemberOffsets[Field]; 2190c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ty = StTy->getElementType(Field); 2191c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } else { 2192c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 2193c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2194c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Handle constant subscripts. 2195c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 2196c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (CI->getRawValue() == 0) continue; 2197c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2198c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 2199c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset += (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 2200c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner else 2201c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset+=TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 2202c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner continue; 2203c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2204c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2205c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Ptr = Ptr + Idx * ElementSize; 2206c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2207c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Cast Idx to UIntPtrTy if needed. 2208c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Idx = new CastInst(Idx, UIntPtrTy, "", GEPI); 2209c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2210c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 2211c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Mask off bits that should not be set. 2212c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ElementSize &= ~0ULL >> (64-UIntPtrTy->getPrimitiveSizeInBits()); 2213c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Constant *SizeCst = ConstantUInt::get(UIntPtrTy, ElementSize); 2214c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2215c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Multiply by the element size and add to the base. 2216c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Idx = BinaryOperator::createMul(Idx, SizeCst, "", GEPI); 2217c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = BinaryOperator::createAdd(Ptr, Idx, "", GEPI); 2218c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2219c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2220c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2221c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Make sure that the offset fits in uintptr_t. 2222c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset &= ~0ULL >> (64-UIntPtrTy->getPrimitiveSizeInBits()); 2223c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Constant *PtrOffset = ConstantUInt::get(UIntPtrTy, ConstantOffset); 2224c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2225c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Okay, we have now emitted all of the variable index parts to the BB that 2226c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // the GEP is defined in. Loop over all of the using instructions, inserting 2227c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // an "add Ptr, ConstantOffset" into each block that uses it and update the 2228c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // instruction to use the newly computed value, making GEPI dead. When the 2229c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // user is a load or store instruction address, we emit the add into the user 2230c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // block, otherwise we use a canonical version right next to the gep (these 2231c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // won't be foldable as addresses, so we might as well share the computation). 2232c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 2233c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner std::map<BasicBlock*,Value*> InsertedExprs; 2234c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner while (!GEPI->use_empty()) { 2235c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Instruction *User = cast<Instruction>(GEPI->use_back()); 2236c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 2237c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // If this use is not foldable into the addressing mode, use a version 2238c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // emitted in the GEP block. 2239c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Value *NewVal; 2240c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (!isa<LoadInst>(User) && 2241c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner (!isa<StoreInst>(User) || User->getOperand(0) == GEPI)) { 2242c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner NewVal = InsertGEPComputeCode(InsertedExprs[DefBB], DefBB, GEPI, 2243c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Ptr, PtrOffset); 2244c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner } else { 2245c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // Otherwise, insert the code in the User's block so it can be folded into 2246c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // any users in that block. 2247c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner NewVal = InsertGEPComputeCode(InsertedExprs[User->getParent()], 2248c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner User->getParent(), GEPI, 2249c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr, PtrOffset); 2250c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2251c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner User->replaceUsesOfWith(GEPI, NewVal); 2252c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner } 2253c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2254c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Finally, the GEP is dead, remove it. 2255c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner GEPI->eraseFromParent(); 2256c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner} 2257c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 22581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerbool SelectionDAGISel::runOnFunction(Function &Fn) { 22591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF = MachineFunction::construct(&Fn, TLI.getTargetMachine()); 22601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner RegMap = MF.getSSARegMap(); 22611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "\n\n\n=== " << Fn.getName() << "\n"); 22621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2263c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // First, split all critical edges for PHI nodes with incoming values that are 2264c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // constants, this way the load of the constant into a vreg will not be placed 2265c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // into MBBs that are used some other way. 2266c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // 2267c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // In this pass we also look for GEP instructions that are used across basic 2268c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // blocks and rewrites them to improve basic-block-at-a-time selection. 2269c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // 227036b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (Function::iterator BB = Fn.begin(), E = Fn.end(); BB != E; ++BB) { 227136b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner PHINode *PN; 2272c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock::iterator BBI; 2273c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (BBI = BB->begin(); (PN = dyn_cast<PHINode>(BBI)); ++BBI) 227436b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) 227536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner if (isa<Constant>(PN->getIncomingValue(i))) 227636b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner SplitCriticalEdge(PN->getIncomingBlock(i), BB); 2277c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2278c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (BasicBlock::iterator E = BB->end(); BBI != E; ) 2279c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (GetElementPtrInst *GEPI = dyn_cast<GetElementPtrInst>(BBI++)) 2280c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner OptimizeGEPExpression(GEPI, TLI.getTargetData()); 228136b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner } 2282c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 22831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo FuncInfo(TLI, Fn, MF); 22841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 22851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) 22861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectBasicBlock(I, MF, FuncInfo); 2287edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 22881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 22891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 22901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 22911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2292ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerSDOperand SelectionDAGISel:: 2293ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerCopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) { 2294f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner SDOperand Op = SDL.getValue(V); 229518c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner assert((Op.getOpcode() != ISD::CopyFromReg || 2296d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && 229718c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner "Copy from a reg to the same reg!"); 2298d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 2299d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, we must make sure to not create an invalid 2300d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register use. 2301d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType SrcVT = Op.getValueType(); 2302d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(SrcVT); 2303d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SelectionDAG &DAG = SDL.DAG; 2304d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (SrcVT == DestVT) { 2305d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 2306d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else if (SrcVT < DestVT) { 2307d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is promoted to the register. 2308fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner if (MVT::isFloatingPoint(SrcVT)) 2309fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner Op = DAG.getNode(ISD::FP_EXTEND, DestVT, Op); 2310fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner else 2311fab08875b73656f373b10a59aad475615df82bafChris Lattner Op = DAG.getNode(ISD::ANY_EXTEND, DestVT, Op); 2312d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 2313d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 2314d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is expanded into multiple registers. 2315d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 2316d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(0, MVT::i32)); 2317d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 2318d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(1, MVT::i32)); 2319d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op = DAG.getCopyToReg(SDL.getRoot(), Reg, Lo); 2320d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(Op, Reg+1, Hi); 2321d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 23221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 23231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2324068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel:: 2325068a81e9fca511b9a3b3a0f28a8988a57f994652Chris LattnerLowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL, 2326068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> &UnorderedChains) { 23271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is the entry block, emit arguments. 2328068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner Function &F = *BB->getParent(); 23290afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FunctionLoweringInfo &FuncInfo = SDL.FuncInfo; 2330bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand OldRoot = SDL.DAG.getRoot(); 2331bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG); 2332bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2333bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner unsigned a = 0; 2334bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 2335bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner AI != E; ++AI, ++a) 2336bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!AI->use_empty()) { 2337bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDL.setValue(AI, Args[a]); 2338fa57702388f139e964befecb4b98c7dfe836945fChris Lattner 2339bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // If this argument is live outside of the entry block, insert a copy from 2340bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // whereever we got it to the vreg that other BB's will reference it as. 2341bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (FuncInfo.ValueMap.count(AI)) { 2342bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand Copy = 2343bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]); 2344bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner UnorderedChains.push_back(Copy); 2345bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner } 23460afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 2347bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2348bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Next, if the function has live ins that need to be copied into vregs, 2349bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // emit the copies now, into the top of the block. 2350bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MachineFunction &MF = SDL.DAG.getMachineFunction(); 2351bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (MF.livein_begin() != MF.livein_end()) { 2352bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SSARegMap *RegMap = MF.getSSARegMap(); 2353bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo(); 2354bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (MachineFunction::livein_iterator LI = MF.livein_begin(), 2355bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner E = MF.livein_end(); LI != E; ++LI) 2356bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LI->second) 2357bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MRI.copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second, 2358bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LI->first, RegMap->getRegClass(LI->second)); 23591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2360bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2361bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Finally, if the target has anything special to do, allow it to do so. 2362bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner EmitFunctionEntryCode(F, SDL.DAG.getMachineFunction()); 2363068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner} 2364068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2365068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2366068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB, 2367068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate, 2368068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner FunctionLoweringInfo &FuncInfo) { 2369068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner SelectionDAGLowering SDL(DAG, TLI, FuncInfo); 2370068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2371068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> UnorderedChains; 2372edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 2373bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Lower any arguments needed in this block if this is the entry block. 2374bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LLVMBB == &LLVMBB->getParent()->front()) 2375bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LowerArguments(LLVMBB, SDL, UnorderedChains); 23761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BB = FuncInfo.MBBMap[LLVMBB]; 23781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.setCurrentBasicBlock(BB); 23791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower all of the non-terminator instructions. 23811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = --LLVMBB->end(); 23821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner I != E; ++I) 23831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*I); 23841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Ensure that all instructions which are used outside of their defining 23861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // blocks are available as virtual registers. 23871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = LLVMBB->end(); I != E;++I) 2388f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner if (!I->use_empty() && !isa<PHINode>(I)) { 2389ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner std::map<const Value*, unsigned>::iterator VMI =FuncInfo.ValueMap.find(I); 23901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (VMI != FuncInfo.ValueMap.end()) 2391ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2392ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, I, VMI->second)); 23931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 23941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle PHI nodes in successor blocks. Emit code into the SelectionDAG to 23961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // ensure constants are generated when needed. Remember the virtual registers 23971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // that need to be added to the Machine PHI nodes as input. We cannot just 23981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // directly add them, because expansion might result in multiple MBB's for one 23991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // BB. As such, the start of the BB might correspond to a different MBB than 24001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the end. 2401edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman // 24021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Emit constants only once even if used by multiple PHI nodes. 24041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<Constant*, unsigned> ConstantsOut; 24051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Check successor nodes PHI nodes that expect a constant to be available from 24071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // this block. 24081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 24091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 24101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *SuccBB = TI->getSuccessor(succ); 24111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock::iterator MBBI = FuncInfo.MBBMap[SuccBB]->begin(); 24121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 24131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // At this point we know that there is a 1-1 correspondence between LLVM PHI 24151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // nodes and Machine PHI nodes, but the incoming operands have not been 24161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // emitted yet. 24171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = SuccBB->begin(); 2418f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 2419f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 2420f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned Reg; 2421f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 2422f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (Constant *C = dyn_cast<Constant>(PHIOp)) { 2423f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned &RegOut = ConstantsOut[C]; 2424f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (RegOut == 0) { 2425f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner RegOut = FuncInfo.CreateRegForValue(C); 2426ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2427ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, C, RegOut)); 2428f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2429f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = RegOut; 2430f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } else { 2431f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = FuncInfo.ValueMap[PHIOp]; 2432ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner if (Reg == 0) { 2433edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman assert(isa<AllocaInst>(PHIOp) && 2434ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && 2435ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner "Didn't codegen value into a register!??"); 2436ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner Reg = FuncInfo.CreateRegForValue(PHIOp); 2437ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2438ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, PHIOp, Reg)); 2439ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner } 24401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2441edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 2442f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // Remember that this register needs to added to the machine PHI node as 2443f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // the input for this MBB. 2444f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 2445f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 2446f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0, e = NumElements; i != e; ++i) 2447f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg+i)); 24481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 24491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 24501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ConstantsOut.clear(); 24511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2452ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner // Turn all of the unordered chains into one factored node. 24535a6c6d98d561df671350a56c8031a3611f1c46faChris Lattner if (!UnorderedChains.empty()) { 24547436b57de32333cc337b8c7cea208c8863eee793Chris Lattner SDOperand Root = SDL.getRoot(); 24557436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (Root.getOpcode() != ISD::EntryToken) { 24567436b57de32333cc337b8c7cea208c8863eee793Chris Lattner unsigned i = 0, e = UnorderedChains.size(); 24577436b57de32333cc337b8c7cea208c8863eee793Chris Lattner for (; i != e; ++i) { 24587436b57de32333cc337b8c7cea208c8863eee793Chris Lattner assert(UnorderedChains[i].Val->getNumOperands() > 1); 24597436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (UnorderedChains[i].Val->getOperand(0) == Root) 24607436b57de32333cc337b8c7cea208c8863eee793Chris Lattner break; // Don't add the root if we already indirectly depend on it. 24617436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 24627436b57de32333cc337b8c7cea208c8863eee793Chris Lattner 24637436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (i == e) 24647436b57de32333cc337b8c7cea208c8863eee793Chris Lattner UnorderedChains.push_back(Root); 24657436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 2466ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, UnorderedChains)); 2467ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner } 2468ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner 24691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower the terminator after the copies are emitted. 24701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*LLVMBB->getTerminator()); 2471a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 2472a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner // Make sure the root of the DAG is up-to-date. 2473a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(SDL.getRoot()); 24741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 24751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF, 24771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo) { 2478b2efb853f00d45b1c8d57f92acd0028fbdeffda6Jim Laskey SelectionDAG DAG(TLI, MF, getAnalysisToUpdate<MachineDebugInfo>()); 24791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurDAG = &DAG; 24801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate; 24811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // First step, lower LLVM code to some DAG. This DAG may use operations and 24831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // types that are not supported by the target. 24841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BuildSelectionDAG(DAG, LLVMBB, PHINodesToUpdate, FuncInfo); 24851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2486af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in pre-legalize mode. 2487af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(false); 24882300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 24891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Lowered selection DAG:\n"); 24901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 24911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Second step, hack on the DAG until it only uses operations and types that 24931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the target supports. 2494ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner DAG.Legalize(); 24951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Legalized selection DAG:\n"); 24971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 24981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2499af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in post-legalize mode. 2500af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(true); 25012300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 2502a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng if (ViewISelDAGs) DAG.viewGraph(); 2503d48050aa1509130871b8bb2453270c92b969c2e7Chris Lattner 2504a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Third, instruction select all of the operations to machine code, adding the 2505a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // code to the MachineBasicBlock. 25061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InstructionSelectBasicBlock(DAG); 25071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 25081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Selected machine code:\n"); 25091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(BB->dump()); 25101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2511a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Next, now that we know what the last MBB the LLVM BB expanded is, update 25121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // PHI nodes in successors. 25131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 0, e = PHINodesToUpdate.size(); i != e; ++i) { 25141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineInstr *PHI = PHINodesToUpdate[i].first; 25151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(PHI->getOpcode() == TargetInstrInfo::PHI && 25161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner "This is not a machine PHI node that we are updating!"); 25171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addRegOperand(PHINodesToUpdate[i].second); 25181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addMachineBasicBlockOperand(BB); 25191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2520a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner 2521a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Finally, add the CFG edges from the last selected MBB to the successor 2522a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // MBBs. 2523a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 2524a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i) { 2525a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[TI->getSuccessor(i)]; 2526a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner BB->addSuccessor(Succ0MBB); 2527a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner } 25281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2529a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng 2530a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng//===----------------------------------------------------------------------===// 2531a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng/// ScheduleAndEmitDAG - Pick a safe ordering and emit instructions for each 2532a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng/// target node in the graph. 2533a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengvoid SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &DAG) { 2534a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng if (ViewSchedDAGs) DAG.viewGraph(); 25354ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng ScheduleDAG *SL = NULL; 25364ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 25374ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng switch (ISHeuristic) { 25384ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng default: assert(0 && "Unrecognized scheduling heuristic"); 25393f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng case defaultScheduling: 25403f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency) 25413f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng SL = createSimpleDAGScheduler(noScheduling, DAG, BB); 25423f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng else /* TargetLowering::SchedulingForRegPressure */ 25433f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng SL = createBURRListDAGScheduler(DAG, BB); 25443f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng break; 25454ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case noScheduling: 254620a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner SL = createBFS_DAGScheduler(DAG, BB); 254720a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner break; 25484ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case simpleScheduling: 254920a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner SL = createSimpleDAGScheduler(false, DAG, BB); 255020a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner break; 25514ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case simpleNoItinScheduling: 255220a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner SL = createSimpleDAGScheduler(true, DAG, BB); 25534ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng break; 2554f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng case listSchedulingBURR: 2555f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng SL = createBURRListDAGScheduler(DAG, BB); 2556a5de484bc7c8f896b5903999797c4d57f4e45185Chris Lattner break; 255703fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner case listSchedulingTD: 2558b0d21ef20c29f4ea46d21b488f17feaa6a8760e1Chris Lattner SL = createTDListDAGScheduler(DAG, BB, CreateTargetHazardRecognizer()); 2559a5de484bc7c8f896b5903999797c4d57f4e45185Chris Lattner break; 25604ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng } 2561a3818e6f9a62db0c5b6aee28e44c30d5f96c9fa4Chris Lattner BB = SL->Run(); 2562cccf1232a69e2d78516c61a97e7bfa26acefb714Evan Cheng delete SL; 2563a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng} 25640e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 2565b0d21ef20c29f4ea46d21b488f17feaa6a8760e1Chris LattnerHazardRecognizer *SelectionDAGISel::CreateTargetHazardRecognizer() { 2566b0d21ef20c29f4ea46d21b488f17feaa6a8760e1Chris Lattner return new HazardRecognizer(); 256703fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner} 256803fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner 25690e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner/// SelectInlineAsmMemoryOperands - Calls to this are automatically generated 25700e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner/// by tblgen. Others should not call it. 25710e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattnervoid SelectionDAGISel:: 25720e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris LattnerSelectInlineAsmMemoryOperands(std::vector<SDOperand> &Ops, SelectionDAG &DAG) { 25730e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::vector<SDOperand> InOps; 25740e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::swap(InOps, Ops); 25750e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 25760e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps[0]); // input chain. 25770e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps[1]); // input asm string. 25780e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 25790e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner const char *AsmStr = cast<ExternalSymbolSDNode>(InOps[1])->getSymbol(); 25800e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner unsigned i = 2, e = InOps.size(); 25810e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (InOps[e-1].getValueType() == MVT::Flag) 25820e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner --e; // Don't process a flag operand if it is here. 25830e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 25840e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner while (i != e) { 25850e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner unsigned Flags = cast<ConstantSDNode>(InOps[i])->getValue(); 25860e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if ((Flags & 7) != 4 /*MEM*/) { 25870e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Just skip over this operand, copying the operands verbatim. 25880e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.insert(Ops.end(), InOps.begin()+i, InOps.begin()+i+(Flags >> 3) + 1); 25890e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner i += (Flags >> 3) + 1; 25900e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } else { 25910e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner assert((Flags >> 3) == 1 && "Memory operand with multiple values?"); 25920e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Otherwise, this is a memory operand. Ask the target to select it. 25930e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::vector<SDOperand> SelOps; 25940e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (SelectInlineAsmMemoryOperand(InOps[i+1], 'm', SelOps, DAG)) { 25950e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::cerr << "Could not match memory address. Inline asm failure!\n"; 25960e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner exit(1); 25970e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 25980e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 25990e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Add this to the output node. 26000e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(DAG.getConstant(4/*MEM*/ | (SelOps.size() << 3), MVT::i32)); 26010e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.insert(Ops.end(), SelOps.begin(), SelOps.end()); 26020e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner i += 2; 26030e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 26040e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 26050e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 26060e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Add the flag input back if present. 26070e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (e != InOps.size()) 26080e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps.back()); 26090e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner} 2610