SelectionDAGISel.cpp revision 20a4921791eafc0cce00fb01dcacfcfc15a0d0fc
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 1741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned CreateRegForValue(const Value *V) { 1751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 1761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // The common case is that we will only create one register for this 1771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // value. If we have that case, create and return the virtual register. 1781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NV = TLI.getNumElements(VT); 179fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner if (NV == 1) { 180fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner // If we are promoting this value, pick the next largest supported type. 18198e5c0e5e4c5be1b531d287d0a1373a62fe562e2Chris Lattner return MakeReg(TLI.getTypeToTransformTo(VT)); 182fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner } 183edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this value is represented with multiple target registers, make sure 185864635ad7b3046d3042311423071152c613961deChris Lattner // to create enough consecutive registers of the right (smaller) type. 1861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NT = VT-1; // Find the type to use. 1871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner while (TLI.getNumElements((MVT::ValueType)NT) != 1) 1881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner --NT; 189edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned R = MakeReg((MVT::ValueType)NT); 1911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1; i != NV; ++i) 1921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MakeReg((MVT::ValueType)NT); 1931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R; 1941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 195edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned InitializeRegForValue(const Value *V) { 1971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned &R = ValueMap[V]; 1981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(R == 0 && "Already initialized this value register!"); 1991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R = CreateRegForValue(V); 2001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner }; 2021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// isUsedOutsideOfDefiningBlock - Return true if this instruction is used by 2051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// PHI nodes or outside of the basic block that defines it. 2061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerstatic bool isUsedOutsideOfDefiningBlock(Instruction *I) { 2071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (isa<PHINode>(I)) return true; 2081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *BB = I->getParent(); 2091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) 2101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (cast<Instruction>(*UI)->getParent() != BB || isa<PHINode>(*UI)) 2111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 2121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return false; 2131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 215bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// isOnlyUsedInEntryBlock - If the specified argument is only used in the 216bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// entry block, return true. 217bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattnerstatic bool isOnlyUsedInEntryBlock(Argument *A) { 218bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner BasicBlock *Entry = A->getParent()->begin(); 219bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Value::use_iterator UI = A->use_begin(), E = A->use_end(); UI != E; ++UI) 220bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (cast<Instruction>(*UI)->getParent() != Entry) 221bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return false; // Use not in entry block. 222bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return true; 223bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner} 224bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris LattnerFunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, 226edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman Function &fn, MachineFunction &mf) 2271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), Fn(fn), MF(mf), RegMap(MF.getSSARegMap()) { 2281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 229bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Create a vreg for each argument register that is not dead and is used 230bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // outside of the entry block for the function. 23116ce0df92717cd1474029d87efe596d000dc2caaChris Lattner for (Function::arg_iterator AI = Fn.arg_begin(), E = Fn.arg_end(); 23216ce0df92717cd1474029d87efe596d000dc2caaChris Lattner AI != E; ++AI) 233bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!isOnlyUsedInEntryBlock(AI)) 234bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner InitializeRegForValue(AI); 2351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 236bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Initialize the mapping of values to registers. This is only set up for 237bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // instruction values that are used outside of the block that defines 238bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // them. 2392aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen Function::iterator BB = Fn.begin(), EB = Fn.end(); 2401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 2411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) 2421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(AI->getArraySize())) { 2431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = AI->getAllocatedType(); 2441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 245ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = 246ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 247ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman AI->getAlignment()); 248a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner 249a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // If the alignment of the value is smaller than the size of the value, 250a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // and if the size of the value is particularly small (<= 8 bytes), 251a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // round up to the size of the value for potentially better performance. 252a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // 253a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // FIXME: This could be made better with a preferred alignment hook in 254a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // TargetData. It serves primarily to 8-byte align doubles for X86. 255a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner if (Align < TySize && TySize <= 8) Align = TySize; 2562dfa8192abaad8a3c29132dba50e8b85218e918cChris Lattner TySize *= CUI->getValue(); // Get total allocated size. 257d222f6ab67472fa2b2e211172a11b43905aa9445Chris Lattner if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects. 2581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner StaticAllocaMap[AI] = 259f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); 2601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2622aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (; BB != EB; ++BB) 2632aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 2641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!I->use_empty() && isUsedOutsideOfDefiningBlock(I)) 2651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!isa<AllocaInst>(I) || 2661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner !StaticAllocaMap.count(cast<AllocaInst>(I))) 2671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InitializeRegForValue(I); 2681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This 2701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // also creates the initial PHI MachineInstrs, though none of the input 2711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // operands are populated. 2722aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BB = Fn.begin(), EB = Fn.end(); BB != EB; ++BB) { 2731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *MBB = new MachineBasicBlock(BB); 2741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MBBMap[BB] = MBB; 2751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MF.getBasicBlockList().push_back(MBB); 2761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create Machine PHI nodes for LLVM PHI nodes, lowering them as 2781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // appropriate. 2791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 2801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(); 281f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 282f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 283f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 284f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 285f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned PHIReg = ValueMap[PN]; 286f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner assert(PHIReg &&"PHI node does not have an assigned virtual register!"); 287f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0; i != NumElements; ++i) 288f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner BuildMI(MBB, TargetInstrInfo::PHI, PN->getNumOperands(), PHIReg+i); 289f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 2961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// SelectionDAGLowering - This is the common target-independent lowering 2971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// implementation that is parameterized by a TargetLowering object. 2981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// Also, targets can overload any lowering method. 2991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// 3001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 3011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerclass SelectionDAGLowering { 3021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *CurMBB; 3031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, SDOperand> NodeMap; 3051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 306d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// PendingLoads - Loads are not emitted to the program immediately. We bunch 307d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// them up and then emit token factor nodes when possible. This allows us to 308d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// get simple disambiguation between loads without worrying about alias 309d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// analysis. 310d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner std::vector<SDOperand> PendingLoads; 311d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 3121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerpublic: 3131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // TLI - This is information that describes the available target features we 3141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // need for lowering. This indicates when operations are unavailable, 3151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // implemented with a libcall, etc. 3161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 3171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAG &DAG; 3181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const TargetData &TD; 3191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FuncInfo - Information about the function as a whole. 3211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// 3221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo; 3231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli, 325edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman FunctionLoweringInfo &funcinfo) 3261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()), 3271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo(funcinfo) { 3281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 330a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// getRoot - Return the current virtual root of the Selection DAG. 331a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// 332a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner SDOperand getRoot() { 333d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.empty()) 334d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return DAG.getRoot(); 335edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 336d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.size() == 1) { 337d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = PendingLoads[0]; 338d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 339d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 340d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 341d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 342d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 343d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Otherwise, we have to make a token factor node. 344d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = DAG.getNode(ISD::TokenFactor, MVT::Other, PendingLoads); 345d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 346d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 347d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 348a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner } 349a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 3501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(Instruction &I) { visit(I.getOpcode(), I); } 3511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(unsigned Opcode, User &I) { 3531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Opcode) { 3541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown instruction type encountered!"); 3551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 3561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Build the switch statement using the Instruction.def file. 3571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define HANDLE_INST(NUM, OPCODE, CLASS) \ 3581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case Instruction::OPCODE:return visit##OPCODE((CLASS&)I); 3591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instruction.def" 3601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void setCurrentBasicBlock(MachineBasicBlock *MBB) { CurMBB = MBB; } 3641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getIntPtrConstant(uint64_t Val) { 3671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getConstant(Val, TLI.getPointerTy()); 3681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getValue(const Value *V) { 3711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 3721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.Val) return N; 3731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3748cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman const Type *VTy = V->getType(); 3758cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman MVT::ValueType VT = TLI.getValueType(VTy); 3761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) 3771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 3781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner visit(CE->getOpcode(), *CE); 3791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val && "visit didn't populate the ValueMap!"); 3801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N; 3811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) { 3821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getGlobalAddress(GV, VT); 3831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<ConstantPointerNull>(C)) { 3841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(0, TLI.getPointerTy()); 3851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<UndefValue>(C)) { 386b882752bd04602249d391699dc7183de007f8964Nate Begeman return N = DAG.getNode(ISD::UNDEF, VT); 3871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 3881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstantFP(CFP->getValue(), VT); 3898cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman } else if (const PackedType *PTy = dyn_cast<PackedType>(VTy)) { 3908cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman unsigned NumElements = PTy->getNumElements(); 3918cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 3928cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 3938cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman 3948cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // Now that we know the number and type of the elements, push a 3958cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // Constant or ConstantFP node onto the ops list for each element of 3968cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // the packed constant. 3978cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman std::vector<SDOperand> Ops; 3983b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) { 3993b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner if (MVT::isFloatingPoint(PVT)) { 4003b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner for (unsigned i = 0; i != NumElements; ++i) { 4013b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner const ConstantFP *El = cast<ConstantFP>(CP->getOperand(i)); 4023b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Ops.push_back(DAG.getConstantFP(El->getValue(), PVT)); 4033b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } 4043b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } else { 4053b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner for (unsigned i = 0; i != NumElements; ++i) { 4063b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner const ConstantIntegral *El = 4073b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner cast<ConstantIntegral>(CP->getOperand(i)); 4083b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Ops.push_back(DAG.getConstant(El->getRawValue(), PVT)); 4093b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } 4103b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } 4113b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } else { 4123b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner assert(isa<ConstantAggregateZero>(C) && "Unknown packed constant!"); 4133b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner SDOperand Op; 4148cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman if (MVT::isFloatingPoint(PVT)) 4153b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Op = DAG.getConstantFP(0, PVT); 4168cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman else 4173b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Op = DAG.getConstant(0, PVT); 4183b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Ops.assign(NumElements, Op); 4198cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman } 4203b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner 4218cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // Handle the case where we have a 1-element vector, in which 4228cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // case we want to immediately turn it into a scalar constant. 423cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman if (Ops.size() == 1) { 4248cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman return N = Ops[0]; 425cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman } else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) { 426cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman return N = DAG.getNode(ISD::ConstantVec, TVT, Ops); 427cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman } else { 428cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman // If the packed type isn't legal, then create a ConstantVec node with 429cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman // generic Vector type instead. 430860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng SDOperand Num = DAG.getConstant(NumElements, MVT::i32); 431860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng SDOperand Typ = DAG.getValueType(PVT); 432860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng Ops.insert(Ops.begin(), Typ); 433860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng Ops.insert(Ops.begin(), Num); 434860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng return N = DAG.getNode(ISD::VConstant, MVT::Vector, Ops); 435cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman } 4361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 4371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Canonicalize all constant ints to be unsigned. 4381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT); 4391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) { 4421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int>::iterator SI = 4431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.StaticAllocaMap.find(AI); 4441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (SI != FuncInfo.StaticAllocaMap.end()) 4451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getFrameIndex(SI->second, TLI.getPointerTy()); 4461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned>::const_iterator VMI = 4491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.ValueMap.find(V); 4501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!"); 451c8ea3c47103656a0924909f41651bf5d396c26cdChris Lattner 452d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner unsigned InReg = VMI->second; 453d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 454d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, make it so now. 455d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT); 456d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 457d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT); 458d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT < VT) { 459d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // Source must be expanded. This input value is actually coming from the 460d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register pair VMI->second and VMI->second+1. 461d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::BUILD_PAIR, VT, N, 462d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT)); 463d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 464d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT > VT) { // Promotion case 465d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (MVT::isFloatingPoint(VT)) 466d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::FP_ROUND, VT, N); 467d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner else 468d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::TRUNCATE, VT, N); 469d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 470d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 471d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 472d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return N; 4731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const SDOperand &setValue(const Value *V, SDOperand NewN) { 4761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 4771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val == 0 && "Already set a value for this node!"); 4781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = NewN; 4791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4804e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 481864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue GetRegistersForValue(const std::string &ConstrCode, 482864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType VT, 483864635ad7b3046d3042311423071152c613961deChris Lattner bool OutReg, bool InReg, 484864635ad7b3046d3042311423071152c613961deChris Lattner std::set<unsigned> &OutputRegs, 485864635ad7b3046d3042311423071152c613961deChris Lattner std::set<unsigned> &InputRegs); 486864635ad7b3046d3042311423071152c613961deChris Lattner 4871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Terminator instructions. 4881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRet(ReturnInst &I); 4891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitBr(BranchInst &I); 4901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnreachable(UnreachableInst &I) { /* noop */ } 4911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // These all get lowered before this pass. 493c0f4cd99316b0b9ae10b5774d1036d74d838f0afRobert Bocchino void visitExtractElement(ExtractElementInst &I) { assert(0 && "TODO"); } 4944eb2e3a6f45e6f0a4a8f0002918f8d14c34169c1Robert Bocchino void visitInsertElement(InsertElementInst &I) { assert(0 && "TODO"); } 4951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSwitch(SwitchInst &I) { assert(0 && "TODO"); } 4961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitInvoke(InvokeInst &I) { assert(0 && "TODO"); } 4971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnwind(UnwindInst &I) { assert(0 && "TODO"); } 4981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 5005fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitBinary(User &I, unsigned IntOp, unsigned FPOp, unsigned VecOp); 501e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShift(User &I, unsigned Opcode); 5025fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitAdd(User &I) { 5035fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::ADD, ISD::FADD, ISD::VADD); 50401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 505b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner void visitSub(User &I); 5065fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitMul(User &I) { 5075fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::MUL, ISD::FMUL, ISD::VMUL); 50801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 5091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitDiv(User &I) { 51001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 5113e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng visitBinary(I, 5123e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng Ty->isSigned() ? ISD::SDIV : ISD::UDIV, ISD::FDIV, 5133e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng Ty->isSigned() ? ISD::VSDIV : ISD::VUDIV); 5141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRem(User &I) { 51601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 5175fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, Ty->isSigned() ? ISD::SREM : ISD::UREM, ISD::FREM, 0); 5181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5193e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng void visitAnd(User &I) { visitBinary(I, ISD::AND, 0, ISD::VAND); } 5203e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng void visitOr (User &I) { visitBinary(I, ISD::OR, 0, ISD::VOR); } 5213e1ce5a44d3d59b2b9ca68a21261f0f487d69269Evan Cheng void visitXor(User &I) { visitBinary(I, ISD::XOR, 0, ISD::VXOR); } 522e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShl(User &I) { visitShift(I, ISD::SHL); } 523e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShr(User &I) { 524e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman visitShift(I, I.getType()->isUnsigned() ? ISD::SRL : ISD::SRA); 5251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetCC(User &I, ISD::CondCode SignedOpc, ISD::CondCode UnsignedOpc); 5281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetEQ(User &I) { visitSetCC(I, ISD::SETEQ, ISD::SETEQ); } 5291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetNE(User &I) { visitSetCC(I, ISD::SETNE, ISD::SETNE); } 5301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLE(User &I) { visitSetCC(I, ISD::SETLE, ISD::SETULE); } 5311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGE(User &I) { visitSetCC(I, ISD::SETGE, ISD::SETUGE); } 5321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLT(User &I) { visitSetCC(I, ISD::SETLT, ISD::SETULT); } 5331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGT(User &I) { visitSetCC(I, ISD::SETGT, ISD::SETUGT); } 5341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitGetElementPtr(User &I); 5361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCast(User &I); 5371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSelect(User &I); 5381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 5391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitMalloc(MallocInst &I); 5411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitFree(FreeInst &I); 5421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAlloca(AllocaInst &I); 5431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitLoad(LoadInst &I); 5441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitStore(StoreInst &I); 5451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitPHI(PHINode &I) { } // PHI nodes are handled specially. 5461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCall(CallInst &I); 547ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner void visitInlineAsm(CallInst &I); 548c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner const char *visitIntrinsicCall(CallInst &I, unsigned Intrinsic); 5491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAStart(CallInst &I); 5511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAArg(VAArgInst &I); 5521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAEnd(CallInst &I); 5531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVACopy(CallInst &I); 55439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner void visitFrameReturnAddress(CallInst &I, bool isFrameAddress); 5551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5567041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner void visitMemIntrinsic(CallInst &I, unsigned Op); 5571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp1(Instruction &I) { 5591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp1 should not exist at instruction selection time!"); 5601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 5611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp2(Instruction &I) { 5631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp2 should not exist at instruction selection time!"); 5641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 5651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner}; 5671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} // end namespace llvm 5681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitRet(ReturnInst &I) { 5701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getNumOperands() == 0) { 571a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot())); 5721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; 5731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 574ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman std::vector<SDOperand> NewValues; 575ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman NewValues.push_back(getRoot()); 576ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) { 577ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman SDOperand RetOp = getValue(I.getOperand(i)); 578ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman 579ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // If this is an integer return value, we need to promote it ourselves to 580ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // the full width of a register, since LegalizeOp will use ANY_EXTEND rather 581ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // than sign/zero. 582ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (MVT::isInteger(RetOp.getValueType()) && 583ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp.getValueType() < MVT::i64) { 584ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman MVT::ValueType TmpVT; 585ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (TLI.getTypeAction(MVT::i32) == TargetLowering::Promote) 586ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman TmpVT = TLI.getTypeToTransformTo(MVT::i32); 587ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman else 588ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman TmpVT = MVT::i32; 5891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 590ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (I.getOperand(i)->getType()->isSigned()) 591ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp = DAG.getNode(ISD::SIGN_EXTEND, TmpVT, RetOp); 592ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman else 593ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp = DAG.getNode(ISD::ZERO_EXTEND, TmpVT, RetOp); 594ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman } 595ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman NewValues.push_back(RetOp); 5961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 597ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, NewValues)); 5981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitBr(BranchInst &I) { 6011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Update machine-CFG edges. 6021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[I.getSuccessor(0)]; 6031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Figure out which block is immediately after the current one. 6051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *NextBlock = 0; 6061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction::iterator BBI = CurMBB; 6071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (++BBI != CurMBB->getParent()->end()) 6081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner NextBlock = BBI; 6091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.isUnconditional()) { 6111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is not a fall-through branch, emit the branch. 6121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ0MBB != NextBlock) 613a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, getRoot(), 614dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman DAG.getBasicBlock(Succ0MBB))); 6151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 6161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; 6171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getCondition()); 6191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ1MBB == NextBlock) { 6201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is false, fall through. This means we should branch 6211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // if the condition is true to Succ #0. 622a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 623dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ0MBB))); 6241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (Succ0MBB == NextBlock) { 6251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is true, fall through. This means we should branch if 6261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the condition is false to Succ #1. Invert the condition first. 6271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand True = DAG.getConstant(1, Cond.getValueType()); 6281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 629a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 630dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ1MBB))); 6311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 632e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner std::vector<SDOperand> Ops; 633e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(getRoot()); 634298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // If the false case is the current basic block, then this is a self 635298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // loop. We do not want to emit "Loop: ... brcond Out; br Loop", as it 636298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // adds an extra instruction in the loop. Instead, invert the 637298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // condition and emit "Loop: ... br!cond Loop; br Out. 638298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng if (CurMBB == Succ1MBB) { 639298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng std::swap(Succ0MBB, Succ1MBB); 640298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng SDOperand True = DAG.getConstant(1, Cond.getValueType()); 641298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 642298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng } 643e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(Cond); 644e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ0MBB)); 645e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ1MBB)); 646e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCONDTWOWAY, MVT::Other, Ops)); 6471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 651b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattnervoid SelectionDAGLowering::visitSub(User &I) { 652b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner // -0.0 - X --> fneg 65301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (I.getType()->isFloatingPoint()) { 65401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0))) 65501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (CFP->isExactlyValue(-0.0)) { 65601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 65701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2)); 65801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner return; 65901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 66001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 6615fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::SUB, ISD::FSUB, ISD::VSUB); 662b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner} 663b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner 6645fbb5d2459a5410590f285250faa604576308a93Nate Begemanvoid SelectionDAGLowering::visitBinary(User &I, unsigned IntOp, unsigned FPOp, 6655fbb5d2459a5410590f285250faa604576308a93Nate Begeman unsigned VecOp) { 6665fbb5d2459a5410590f285250faa604576308a93Nate Begeman const Type *Ty = I.getType(); 6671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 6681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 6692c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 670b67eb9131c5c04d2e55c6b587fde954619feceafChris Lattner if (Ty->isIntegral()) { 6715fbb5d2459a5410590f285250faa604576308a93Nate Begeman setValue(&I, DAG.getNode(IntOp, Op1.getValueType(), Op1, Op2)); 6725fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else if (Ty->isFloatingPoint()) { 6735fbb5d2459a5410590f285250faa604576308a93Nate Begeman setValue(&I, DAG.getNode(FPOp, Op1.getValueType(), Op1, Op2)); 6745fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else { 6755fbb5d2459a5410590f285250faa604576308a93Nate Begeman const PackedType *PTy = cast<PackedType>(Ty); 6764ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman unsigned NumElements = PTy->getNumElements(); 6774ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 678f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 6794ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman 6804ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman // Immediately scalarize packed types containing only one element, so that 681f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // the Legalize pass does not have to deal with them. Similarly, if the 682f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // abstract vector is going to turn into one that the target natively 683f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // supports, generate that type now so that Legalize doesn't have to deal 684f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // with that either. These steps ensure that Legalize only has to handle 685f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // vector types in its Expand case. 686f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman unsigned Opc = MVT::isFloatingPoint(PVT) ? FPOp : IntOp; 6874ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman if (NumElements == 1) { 6884ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman setValue(&I, DAG.getNode(Opc, PVT, Op1, Op2)); 689860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng } else if (TVT != MVT::Other && 690860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng TLI.isTypeLegal(TVT) && TLI.isOperationLegal(Opc, TVT)) { 691f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman setValue(&I, DAG.getNode(Opc, TVT, Op1, Op2)); 6924ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } else { 6934ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman SDOperand Num = DAG.getConstant(NumElements, MVT::i32); 6944ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman SDOperand Typ = DAG.getValueType(PVT); 695860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng setValue(&I, DAG.getNode(VecOp, MVT::Vector, Num, Typ, Op1, Op2)); 6964ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } 6975fbb5d2459a5410590f285250faa604576308a93Nate Begeman } 698e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman} 6992c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 700e21ea61588996609f827213a2701a204f2f13fb3Nate Begemanvoid SelectionDAGLowering::visitShift(User &I, unsigned Opcode) { 701e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman SDOperand Op1 = getValue(I.getOperand(0)); 702e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman SDOperand Op2 = getValue(I.getOperand(1)); 703e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman 704e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman Op2 = DAG.getNode(ISD::ANY_EXTEND, TLI.getShiftAmountTy(), Op2); 705e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman 7061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(Opcode, Op1.getValueType(), Op1, Op2)); 7071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSetCC(User &I,ISD::CondCode SignedOpcode, 7101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode UnsignedOpcode) { 7111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 7121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 7131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode Opcode = SignedOpcode; 7141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isUnsigned()) 7151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Opcode = UnsignedOpcode; 7167cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, Op1, Op2, Opcode)); 7171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSelect(User &I) { 7201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getOperand(0)); 7211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand TrueVal = getValue(I.getOperand(1)); 7221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand FalseVal = getValue(I.getOperand(2)); 7231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(ISD::SELECT, TrueVal.getValueType(), Cond, 7241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TrueVal, FalseVal)); 7251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCast(User &I) { 7281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 7291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType SrcTy = TLI.getValueType(I.getOperand(0)->getType()); 7301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType DestTy = TLI.getValueType(I.getType()); 7311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.getValueType() == DestTy) { 7331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); // noop cast. 734ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner } else if (DestTy == MVT::i1) { 735ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner // Cast to bool is a comparison against zero, not truncation to zero. 736ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner SDOperand Zero = isInteger(SrcTy) ? DAG.getConstant(0, N.getValueType()) : 737ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner DAG.getConstantFP(0.0, N.getValueType()); 7387cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, N, Zero, ISD::SETNE)); 739ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else if (isInteger(SrcTy)) { 740ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isInteger(DestTy)) { // Int -> Int cast 741ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Truncating cast? 742ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::TRUNCATE, DestTy, N)); 743ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else if (I.getOperand(0)->getType()->isSigned()) 744ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SIGN_EXTEND, DestTy, N)); 745ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 746ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, DestTy, N)); 747ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // Int -> FP cast 748ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getOperand(0)->getType()->isSigned()) 749ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SINT_TO_FP, DestTy, N)); 750ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 751ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::UINT_TO_FP, DestTy, N)); 752ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 7531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 754ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner assert(isFloatingPoint(SrcTy) && "Unknown value type!"); 755ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isFloatingPoint(DestTy)) { // FP -> FP cast 756ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Rounding cast? 757ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_ROUND, DestTy, N)); 758ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 759ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_EXTEND, DestTy, N)); 760ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // FP -> Int cast. 761ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getType()->isSigned()) 762ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_SINT, DestTy, N)); 763ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 764ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_UINT, DestTy, N)); 765ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 7661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitGetElementPtr(User &I) { 7701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 7711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getOperand(0)->getType(); 7721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 7731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (GetElementPtrInst::op_iterator OI = I.op_begin()+1, E = I.op_end(); 7751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner OI != E; ++OI) { 7761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Idx = *OI; 777c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 7781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 7791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Field) { 7801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // N = N + Offset 7811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t Offset = TD.getStructLayout(StTy)->MemberOffsets[Field]; 7821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, 783dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman getIntPtrConstant(Offset)); 7841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = StTy->getElementType(Field); 7861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 7871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 7887c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7897c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a constant subscript, handle it quickly. 7907c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 7917c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (CI->getRawValue() == 0) continue; 7927c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7937c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t Offs; 7947c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 7957c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 7967c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 7977c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 7987c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, getIntPtrConstant(Offs)); 7997c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 8007c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } 8017c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 8027c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // N = N + Idx * ElementSize; 8037c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 8047c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand IdxN = getValue(Idx); 8057c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 8067c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If the index is smaller or larger than intptr_t, truncate or extend 8077c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // it. 8087c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (IdxN.getValueType() < N.getValueType()) { 8097c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (Idx->getType()->isSigned()) 8107c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SIGN_EXTEND, N.getValueType(), IdxN); 8117c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 8127c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::ZERO_EXTEND, N.getValueType(), IdxN); 8137c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } else if (IdxN.getValueType() > N.getValueType()) 8147c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::TRUNCATE, N.getValueType(), IdxN); 8157c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 8167c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a multiply by a power of two, turn it into a shl 8177c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // immediately. This is a very common case. 8187c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (isPowerOf2_64(ElementSize)) { 8197c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner unsigned Amt = Log2_64(ElementSize); 8207c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SHL, N.getValueType(), IdxN, 8216b2d69655ace2788b244c8a4ebcfb6f2a926ad92Chris Lattner DAG.getConstant(Amt, TLI.getShiftAmountTy())); 8221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 8237c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 8241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8257c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 8267c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand Scale = getIntPtrConstant(ElementSize); 8277c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale); 8287c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 8291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); 8321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitAlloca(AllocaInst &I) { 8351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is a fixed sized alloca in the entry block of the function, 8361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // allocate it statically on the stack. 8371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (FuncInfo.StaticAllocaMap.count(&I)) 8381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; // getValue will auto-populate this. 8391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getAllocatedType(); 8411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 842ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 843ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman I.getAlignment()); 8441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand AllocSize = getValue(I.getArraySize()); 84668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 84768cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < AllocSize.getValueType()) 84868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::TRUNCATE, IntPtr, AllocSize); 84968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > AllocSize.getValueType()) 85068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, AllocSize); 8511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 85268cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::MUL, IntPtr, AllocSize, 8531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(TySize)); 8541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle alignment. If the requested alignment is less than or equal to the 8561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment, ignore it and round the size of the allocation up to the 8571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment size. If the size is greater than the stack alignment, we 8581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // note this in the DYNAMIC_STACKALLOC node. 8591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned StackAlign = 8601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetMachine().getFrameInfo()->getStackAlignment(); 8611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Align <= StackAlign) { 8621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Align = 0; 8631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Add SA-1 to the size. 8641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::ADD, AllocSize.getValueType(), AllocSize, 8651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(StackAlign-1)); 8661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Mask out the low bits for alignment purposes. 8671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::AND, AllocSize.getValueType(), AllocSize, 8681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(~(uint64_t)(StackAlign-1))); 8691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 871adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<MVT::ValueType> VTs; 872adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(AllocSize.getValueType()); 873adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(MVT::Other); 874adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<SDOperand> Ops; 875adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getRoot()); 876adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(AllocSize); 877adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getIntPtrConstant(Align)); 878adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops); 8791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DAG.setRoot(setValue(&I, DSA).getValue(1)); 8801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Inform the Frame Information that we have just allocated a variable-sized 8821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // object. 8831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurMBB->getParent()->getFrameInfo()->CreateVariableSizedObject(); 8841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitLoad(LoadInst &I) { 8871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(0)); 888edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 889d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root; 890d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 891d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = getRoot(); 892d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else { 893d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Do not serialize non-volatile loads against each other. 894d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = DAG.getRoot(); 895d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 8965fbb5d2459a5410590f285250faa604576308a93Nate Begeman 8975fbb5d2459a5410590f285250faa604576308a93Nate Begeman const Type *Ty = I.getType(); 8985fbb5d2459a5410590f285250faa604576308a93Nate Begeman SDOperand L; 8995fbb5d2459a5410590f285250faa604576308a93Nate Begeman 9008cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman if (const PackedType *PTy = dyn_cast<PackedType>(Ty)) { 9014ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman unsigned NumElements = PTy->getNumElements(); 9024ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 903f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 9044ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman 9054ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman // Immediately scalarize packed types containing only one element, so that 9064ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman // the Legalize pass does not have to deal with them. 9074ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman if (NumElements == 1) { 9084ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman L = DAG.getLoad(PVT, Root, Ptr, DAG.getSrcValue(I.getOperand(0))); 909860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng } else if (TVT != MVT::Other && 910860771d2d86243b65ec16fac6cc57b285078f138Evan Cheng TLI.isTypeLegal(TVT) && TLI.isOperationLegal(ISD::LOAD, TVT)) { 911f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman L = DAG.getLoad(TVT, Root, Ptr, DAG.getSrcValue(I.getOperand(0))); 9124ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } else { 9134ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman L = DAG.getVecLoad(NumElements, PVT, Root, Ptr, 9144ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman DAG.getSrcValue(I.getOperand(0))); 9154ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } 9165fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else { 9175fbb5d2459a5410590f285250faa604576308a93Nate Begeman L = DAG.getLoad(TLI.getValueType(Ty), Root, Ptr, 9185fbb5d2459a5410590f285250faa604576308a93Nate Begeman DAG.getSrcValue(I.getOperand(0))); 9195fbb5d2459a5410590f285250faa604576308a93Nate Begeman } 920d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner setValue(&I, L); 921d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 922d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 923d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(L.getValue(1)); 924d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else 925d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.push_back(L.getValue(1)); 9261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitStore(StoreInst &I) { 9301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *SrcV = I.getOperand(0); 9311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(SrcV); 9321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(1)); 933369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner DAG.setRoot(DAG.getNode(ISD::STORE, MVT::Other, getRoot(), Src, Ptr, 93406ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(1)))); 9351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 937c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// visitIntrinsicCall - Lower the call to the specified intrinsic function. If 938c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// we want to emit this as a call to a named external function, return the name 939c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// otherwise lower it and return null. 940c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattnerconst char * 941c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris LattnerSelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { 942c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner switch (Intrinsic) { 943c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vastart: visitVAStart(I); return 0; 944c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vaend: visitVAEnd(I); return 0; 945c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vacopy: visitVACopy(I); return 0; 946c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::returnaddress: visitFrameReturnAddress(I, false); return 0; 947c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::frameaddress: visitFrameReturnAddress(I, true); return 0; 948c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::setjmp: 949c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return "_setjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 950c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner break; 951c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::longjmp: 952c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return "_longjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 953c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner break; 95403dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memcpy_i32: 95503dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memcpy_i64: 95603dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner visitMemIntrinsic(I, ISD::MEMCPY); 95703dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner return 0; 95803dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memset_i32: 95903dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memset_i64: 96003dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner visitMemIntrinsic(I, ISD::MEMSET); 96103dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner return 0; 96203dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memmove_i32: 96303dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner case Intrinsic::memmove_i64: 96403dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner visitMemIntrinsic(I, ISD::MEMMOVE); 96503dd4652158f8a4c1db65f066195342d4a3695a7Chris Lattner return 0; 966c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 96786cb643801be1308ba1da7db774b64852a119e94Chris Lattner case Intrinsic::dbg_stoppoint: { 968b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 969b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_debugger_stop"; 97036ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner 971ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey MachineDebugInfo *DebugInfo = DAG.getMachineDebugInfo(); 972ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey if (DebugInfo && DebugInfo->Verify(I.getOperand(4))) { 973ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey std::vector<SDOperand> Ops; 97436ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner 975ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // Input Chain 976ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getRoot()); 977ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 978ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // line number 979ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getValue(I.getOperand(2))); 980ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 981ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // column 982ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getValue(I.getOperand(3))); 983ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 984d96185aa62dacf5c75d889231a8ab2e0f1ceb073Jim Laskey DebugInfoDesc *DD = DebugInfo->getDescFor(I.getOperand(4)); 985ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey assert(DD && "Not a debug information descriptor"); 986ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey CompileUnitDesc *CompileUnit = dyn_cast<CompileUnitDesc>(DD); 987ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey assert(CompileUnit && "Not a compile unit"); 988ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(DAG.getString(CompileUnit->getFileName())); 989ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(DAG.getString(CompileUnit->getDirectory())); 990ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 991ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey if (Ops.size() == 5) // Found filename/workingdir. 992ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey DAG.setRoot(DAG.getNode(ISD::LOCATION, MVT::Other, Ops)); 99386cb643801be1308ba1da7db774b64852a119e94Chris Lattner } 99486cb643801be1308ba1da7db774b64852a119e94Chris Lattner 995d67b3a8bf75d4d3c50263960a9375e6856588f2cChris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 996b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 99736ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner } 998c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_region_start: 999b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 1000b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_dbg_region_start"; 1001b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 1002b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1003b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 1004c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_region_end: 1005b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 1006b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_dbg_region_end"; 1007b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 1008b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1009b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 1010c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_func_start: 1011b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 1012b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_dbg_subprogram"; 1013b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 1014b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 1015b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 1016c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 10170b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::isunordered_f32: 10180b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::isunordered_f64: 1019c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1,getValue(I.getOperand(1)), 1020c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(2)), ISD::SETUO)); 1021c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1022c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 10230b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::sqrt_f32: 10240b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::sqrt_f64: 1025c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::FSQRT, 1026c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1027c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1028c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1029c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::pcmarker: { 1030c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1031c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner DAG.setRoot(DAG.getNode(ISD::PCMARKER, MVT::Other, getRoot(), Tmp)); 1032c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1033c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 10348b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth case Intrinsic::readcyclecounter: { 10358b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth std::vector<MVT::ValueType> VTs; 10368b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth VTs.push_back(MVT::i64); 10378b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth VTs.push_back(MVT::Other); 10388b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth std::vector<SDOperand> Ops; 10398b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth Ops.push_back(getRoot()); 10408b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth SDOperand Tmp = DAG.getNode(ISD::READCYCLECOUNTER, VTs, Ops); 10418b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth setValue(&I, Tmp); 10428b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth DAG.setRoot(Tmp.getValue(1)); 104351b8d54922350b7e1c2cd5a5183ef2c5f5d1b1d5Andrew Lenharth return 0; 10448b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth } 1045d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i16: 1046d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i32: 1047d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i64: 1048d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman setValue(&I, DAG.getNode(ISD::BSWAP, 1049d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman getValue(I.getOperand(1)).getValueType(), 1050d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman getValue(I.getOperand(1)))); 1051d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman return 0; 10520b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i8: 10530b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i16: 10540b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i32: 10550b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i64: 1056c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTTZ, 1057c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1058c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1059c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 10600b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i8: 10610b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i16: 10620b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i32: 10630b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i64: 1064c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTLZ, 1065c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1066c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1067c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 10680b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i8: 10690b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i16: 10700b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i32: 10710b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i64: 1072c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTPOP, 1073c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1074c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1075c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1076140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner case Intrinsic::stacksave: { 1077140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner std::vector<MVT::ValueType> VTs; 1078140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner VTs.push_back(TLI.getPointerTy()); 1079140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner VTs.push_back(MVT::Other); 1080140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner std::vector<SDOperand> Ops; 1081140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner Ops.push_back(getRoot()); 1082140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner SDOperand Tmp = DAG.getNode(ISD::STACKSAVE, VTs, Ops); 1083140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner setValue(&I, Tmp); 1084140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner DAG.setRoot(Tmp.getValue(1)); 1085140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner return 0; 1086140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner } 108739a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner case Intrinsic::stackrestore: { 108839a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 108939a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner DAG.setRoot(DAG.getNode(ISD::STACKRESTORE, MVT::Other, getRoot(), Tmp)); 1090140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner return 0; 109139a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner } 1092ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner case Intrinsic::prefetch: 1093ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner // FIXME: Currently discarding prefetches. 1094ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner return 0; 1095c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner default: 1096c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner std::cerr << I; 1097c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner assert(0 && "This intrinsic is not implemented yet!"); 1098c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1099c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 1100c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner} 1101c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 1102c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 11031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCall(CallInst &I) { 110464e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner const char *RenameFn = 0; 1105c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (Function *F = I.getCalledFunction()) { 1106c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->isExternal()) 1107c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (unsigned IID = F->getIntrinsicID()) { 1108c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner RenameFn = visitIntrinsicCall(I, IID); 1109c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (!RenameFn) 1110c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return; 1111c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else { // Not an LLVM intrinsic. 1112c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner const std::string &Name = F->getName(); 1113a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner if (Name[0] == 'c' && (Name == "copysign" || Name == "copysignf")) { 1114a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner if (I.getNumOperands() == 3 && // Basic sanity checks. 1115a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 1116a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner I.getType() == I.getOperand(1)->getType() && 1117a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner I.getType() == I.getOperand(2)->getType()) { 1118a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner SDOperand LHS = getValue(I.getOperand(1)); 1119a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner SDOperand RHS = getValue(I.getOperand(2)); 1120a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner setValue(&I, DAG.getNode(ISD::FCOPYSIGN, LHS.getValueType(), 1121a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner LHS, RHS)); 1122a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner return; 1123a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner } 1124a09f848c11c9db3c2614e0275a3256310ac26653Chris Lattner } else if (Name[0] == 'f' && (Name == "fabs" || Name == "fabsf")) { 1125c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1126c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 1127c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1128c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1129c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner setValue(&I, DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp)); 1130c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 1131c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 1132c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else if (Name[0] == 's' && (Name == "sin" || Name == "sinf")) { 1133f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1134f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 113506a248c9b398049d41cf6dd1a3f9eecc75603401Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1136c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1137f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSIN, Tmp.getValueType(), Tmp)); 1138f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 1139f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1140c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else if (Name[0] == 'c' && (Name == "cos" || Name == "cosf")) { 1141f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1142f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 114306a248c9b398049d41cf6dd1a3f9eecc75603401Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1144c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1145f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FCOS, Tmp.getValueType(), Tmp)); 1146f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 1147f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1148f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1149c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 1150ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner } else if (isa<InlineAsm>(I.getOperand(0))) { 1151ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner visitInlineAsm(I); 1152ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner return; 1153c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 1154edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 115564e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner SDOperand Callee; 115664e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner if (!RenameFn) 115764e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = getValue(I.getOperand(0)); 115864e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner else 115964e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = DAG.getExternalSymbol(RenameFn, TLI.getPointerTy()); 11601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 1161c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner Args.reserve(I.getNumOperands()); 11621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i) { 11631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Arg = I.getOperand(i); 11641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand ArgNode = getValue(Arg); 11651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(ArgNode, Arg->getType())); 11661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1167edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 11688e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const PointerType *PT = cast<PointerType>(I.getCalledValue()->getType()); 11698e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const FunctionType *FTy = cast<FunctionType>(PT->getElementType()); 1170edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1171cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 11729092fa310c8b2b1645b0d448c4c34b1e8ddc131dChris Lattner TLI.LowerCallTo(getRoot(), I.getType(), FTy->isVarArg(), I.getCallingConv(), 1173adf6a965a321372c640845407195594835921eb4Chris Lattner I.isTailCall(), Callee, Args, DAG); 11741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getType() != Type::VoidTy) 1175cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); 1176cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 11771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 11781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1179864635ad7b3046d3042311423071152c613961deChris LattnerSDOperand RegsForValue::getCopyFromRegs(SelectionDAG &DAG, 11809f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner SDOperand &Chain, SDOperand &Flag)const{ 1181864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand Val = DAG.getCopyFromReg(Chain, Regs[0], RegVT, Flag); 1182864635ad7b3046d3042311423071152c613961deChris Lattner Chain = Val.getValue(1); 1183864635ad7b3046d3042311423071152c613961deChris Lattner Flag = Val.getValue(2); 1184864635ad7b3046d3042311423071152c613961deChris Lattner 1185864635ad7b3046d3042311423071152c613961deChris Lattner // If the result was expanded, copy from the top part. 1186864635ad7b3046d3042311423071152c613961deChris Lattner if (Regs.size() > 1) { 1187864635ad7b3046d3042311423071152c613961deChris Lattner assert(Regs.size() == 2 && 1188864635ad7b3046d3042311423071152c613961deChris Lattner "Cannot expand to more than 2 elts yet!"); 1189864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand Hi = DAG.getCopyFromReg(Chain, Regs[1], RegVT, Flag); 1190864635ad7b3046d3042311423071152c613961deChris Lattner Chain = Val.getValue(1); 1191864635ad7b3046d3042311423071152c613961deChris Lattner Flag = Val.getValue(2); 11929f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner if (DAG.getTargetLoweringInfo().isLittleEndian()) 11939f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner return DAG.getNode(ISD::BUILD_PAIR, ValueVT, Val, Hi); 11949f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner else 11959f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner return DAG.getNode(ISD::BUILD_PAIR, ValueVT, Hi, Val); 1196864635ad7b3046d3042311423071152c613961deChris Lattner } 1197864635ad7b3046d3042311423071152c613961deChris Lattner 1198864635ad7b3046d3042311423071152c613961deChris Lattner // Otherwise, if the return value was promoted, truncate it to the 1199864635ad7b3046d3042311423071152c613961deChris Lattner // appropriate type. 1200864635ad7b3046d3042311423071152c613961deChris Lattner if (RegVT == ValueVT) 1201864635ad7b3046d3042311423071152c613961deChris Lattner return Val; 1202864635ad7b3046d3042311423071152c613961deChris Lattner 1203864635ad7b3046d3042311423071152c613961deChris Lattner if (MVT::isInteger(RegVT)) 1204864635ad7b3046d3042311423071152c613961deChris Lattner return DAG.getNode(ISD::TRUNCATE, ValueVT, Val); 1205864635ad7b3046d3042311423071152c613961deChris Lattner else 1206864635ad7b3046d3042311423071152c613961deChris Lattner return DAG.getNode(ISD::FP_ROUND, ValueVT, Val); 1207864635ad7b3046d3042311423071152c613961deChris Lattner} 1208864635ad7b3046d3042311423071152c613961deChris Lattner 1209c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// getCopyToRegs - Emit a series of CopyToReg nodes that copies the 1210c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// specified value into the registers specified by this object. This uses 1211c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// Chain/Flag as the input and updates them for the output Chain/Flag. 1212c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattnervoid RegsForValue::getCopyToRegs(SDOperand Val, SelectionDAG &DAG, 12139f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner SDOperand &Chain, SDOperand &Flag) const { 1214c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (Regs.size() == 1) { 1215c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // If there is a single register and the types differ, this must be 1216c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // a promotion. 1217c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (RegVT != ValueVT) { 1218c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (MVT::isInteger(RegVT)) 1219c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Val = DAG.getNode(ISD::ANY_EXTEND, RegVT, Val); 1220c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner else 1221c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Val = DAG.getNode(ISD::FP_EXTEND, RegVT, Val); 1222c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1223c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Chain = DAG.getCopyToReg(Chain, Regs[0], Val, Flag); 1224c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Flag = Chain.getValue(1); 1225c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } else { 12269f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::vector<unsigned> R(Regs); 12279f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner if (!DAG.getTargetLoweringInfo().isLittleEndian()) 12289f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::reverse(R.begin(), R.end()); 12299f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner 12309f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner for (unsigned i = 0, e = R.size(); i != e; ++i) { 1231c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner SDOperand Part = DAG.getNode(ISD::EXTRACT_ELEMENT, RegVT, Val, 1232c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner DAG.getConstant(i, MVT::i32)); 12339f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner Chain = DAG.getCopyToReg(Chain, R[i], Part, Flag); 1234c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Flag = Chain.getValue(1); 1235c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1236c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1237c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner} 1238864635ad7b3046d3042311423071152c613961deChris Lattner 1239c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// AddInlineAsmOperands - Add this value to the specified inlineasm node 1240c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// operand list. This adds the code marker and includes the number of 1241c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner/// values added into it. 1242c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattnervoid RegsForValue::AddInlineAsmOperands(unsigned Code, SelectionDAG &DAG, 12439f6637db10642fae51fa3628b7833c6999f7fdb3Chris Lattner std::vector<SDOperand> &Ops) const { 1244c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Ops.push_back(DAG.getConstant(Code | (Regs.size() << 3), MVT::i32)); 1245c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner for (unsigned i = 0, e = Regs.size(); i != e; ++i) 1246c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Ops.push_back(DAG.getRegister(Regs[i], RegVT)); 1247c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner} 1248864635ad7b3046d3042311423071152c613961deChris Lattner 1249864635ad7b3046d3042311423071152c613961deChris Lattner/// isAllocatableRegister - If the specified register is safe to allocate, 1250864635ad7b3046d3042311423071152c613961deChris Lattner/// i.e. it isn't a stack pointer or some other special register, return the 1251864635ad7b3046d3042311423071152c613961deChris Lattner/// register class for the register. Otherwise, return null. 1252864635ad7b3046d3042311423071152c613961deChris Lattnerstatic const TargetRegisterClass * 12539b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris LattnerisAllocatableRegister(unsigned Reg, MachineFunction &MF, 12549b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner const TargetLowering &TLI, const MRegisterInfo *MRI) { 12559b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner for (MRegisterInfo::regclass_iterator RCI = MRI->regclass_begin(), 12569b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner E = MRI->regclass_end(); RCI != E; ++RCI) { 12579b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner const TargetRegisterClass *RC = *RCI; 12589b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner // If none of the the value types for this register class are valid, we 12599b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner // can't use it. For example, 64-bit reg classes on 32-bit targets. 12609b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner bool isLegal = false; 12619b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner for (TargetRegisterClass::vt_iterator I = RC->vt_begin(), E = RC->vt_end(); 12629b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner I != E; ++I) { 12639b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner if (TLI.isTypeLegal(*I)) { 12649b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner isLegal = true; 12659b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner break; 12669b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner } 12679b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner } 12689b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner 12699b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner if (!isLegal) continue; 12709b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner 1271864635ad7b3046d3042311423071152c613961deChris Lattner // NOTE: This isn't ideal. In particular, this might allocate the 1272864635ad7b3046d3042311423071152c613961deChris Lattner // frame pointer in functions that need it (due to them not being taken 1273864635ad7b3046d3042311423071152c613961deChris Lattner // out of allocation, because a variable sized allocation hasn't been seen 1274864635ad7b3046d3042311423071152c613961deChris Lattner // yet). This is a slight code pessimization, but should still work. 12759b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner for (TargetRegisterClass::iterator I = RC->allocation_order_begin(MF), 12769b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner E = RC->allocation_order_end(MF); I != E; ++I) 1277864635ad7b3046d3042311423071152c613961deChris Lattner if (*I == Reg) 12789b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner return RC; 1279864635ad7b3046d3042311423071152c613961deChris Lattner } 1280864635ad7b3046d3042311423071152c613961deChris Lattner return 0; 1281864635ad7b3046d3042311423071152c613961deChris Lattner} 1282864635ad7b3046d3042311423071152c613961deChris Lattner 1283864635ad7b3046d3042311423071152c613961deChris LattnerRegsForValue SelectionDAGLowering:: 1284864635ad7b3046d3042311423071152c613961deChris LattnerGetRegistersForValue(const std::string &ConstrCode, 1285864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType VT, bool isOutReg, bool isInReg, 1286864635ad7b3046d3042311423071152c613961deChris Lattner std::set<unsigned> &OutputRegs, 12874e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> &InputRegs) { 1288864635ad7b3046d3042311423071152c613961deChris Lattner std::pair<unsigned, const TargetRegisterClass*> PhysReg = 1289864635ad7b3046d3042311423071152c613961deChris Lattner TLI.getRegForInlineAsmConstraint(ConstrCode, VT); 1290864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<unsigned> Regs; 1291864635ad7b3046d3042311423071152c613961deChris Lattner 1292864635ad7b3046d3042311423071152c613961deChris Lattner unsigned NumRegs = VT != MVT::Other ? TLI.getNumElements(VT) : 1; 1293864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType RegVT; 1294864635ad7b3046d3042311423071152c613961deChris Lattner MVT::ValueType ValueVT = VT; 1295864635ad7b3046d3042311423071152c613961deChris Lattner 1296864635ad7b3046d3042311423071152c613961deChris Lattner if (PhysReg.first) { 1297864635ad7b3046d3042311423071152c613961deChris Lattner if (VT == MVT::Other) 1298864635ad7b3046d3042311423071152c613961deChris Lattner ValueVT = *PhysReg.second->vt_begin(); 1299864635ad7b3046d3042311423071152c613961deChris Lattner RegVT = VT; 1300864635ad7b3046d3042311423071152c613961deChris Lattner 1301864635ad7b3046d3042311423071152c613961deChris Lattner // This is a explicit reference to a physical register. 1302864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(PhysReg.first); 1303864635ad7b3046d3042311423071152c613961deChris Lattner 1304864635ad7b3046d3042311423071152c613961deChris Lattner // If this is an expanded reference, add the rest of the regs to Regs. 1305864635ad7b3046d3042311423071152c613961deChris Lattner if (NumRegs != 1) { 1306864635ad7b3046d3042311423071152c613961deChris Lattner RegVT = *PhysReg.second->vt_begin(); 1307864635ad7b3046d3042311423071152c613961deChris Lattner TargetRegisterClass::iterator I = PhysReg.second->begin(); 1308864635ad7b3046d3042311423071152c613961deChris Lattner TargetRegisterClass::iterator E = PhysReg.second->end(); 1309864635ad7b3046d3042311423071152c613961deChris Lattner for (; *I != PhysReg.first; ++I) 1310864635ad7b3046d3042311423071152c613961deChris Lattner assert(I != E && "Didn't find reg!"); 1311864635ad7b3046d3042311423071152c613961deChris Lattner 1312864635ad7b3046d3042311423071152c613961deChris Lattner // Already added the first reg. 1313864635ad7b3046d3042311423071152c613961deChris Lattner --NumRegs; ++I; 1314864635ad7b3046d3042311423071152c613961deChris Lattner for (; NumRegs; --NumRegs, ++I) { 1315864635ad7b3046d3042311423071152c613961deChris Lattner assert(I != E && "Ran out of registers to allocate!"); 1316864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(*I); 1317864635ad7b3046d3042311423071152c613961deChris Lattner } 1318864635ad7b3046d3042311423071152c613961deChris Lattner } 1319864635ad7b3046d3042311423071152c613961deChris Lattner return RegsForValue(Regs, RegVT, ValueVT); 1320864635ad7b3046d3042311423071152c613961deChris Lattner } 1321864635ad7b3046d3042311423071152c613961deChris Lattner 1322864635ad7b3046d3042311423071152c613961deChris Lattner // This is a reference to a register class. Allocate NumRegs consecutive, 1323864635ad7b3046d3042311423071152c613961deChris Lattner // available, registers from the class. 1324864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<unsigned> RegClassRegs = 1325864635ad7b3046d3042311423071152c613961deChris Lattner TLI.getRegClassForInlineAsmConstraint(ConstrCode, VT); 1326864635ad7b3046d3042311423071152c613961deChris Lattner 13274e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner const MRegisterInfo *MRI = DAG.getTarget().getRegisterInfo(); 13284e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner MachineFunction &MF = *CurMBB->getParent(); 1329864635ad7b3046d3042311423071152c613961deChris Lattner unsigned NumAllocated = 0; 1330864635ad7b3046d3042311423071152c613961deChris Lattner for (unsigned i = 0, e = RegClassRegs.size(); i != e; ++i) { 1331864635ad7b3046d3042311423071152c613961deChris Lattner unsigned Reg = RegClassRegs[i]; 13324e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // See if this register is available. 1333864635ad7b3046d3042311423071152c613961deChris Lattner if ((isOutReg && OutputRegs.count(Reg)) || // Already used. 1334864635ad7b3046d3042311423071152c613961deChris Lattner (isInReg && InputRegs.count(Reg))) { // Already used. 1335864635ad7b3046d3042311423071152c613961deChris Lattner // Make sure we find consecutive registers. 1336864635ad7b3046d3042311423071152c613961deChris Lattner NumAllocated = 0; 1337864635ad7b3046d3042311423071152c613961deChris Lattner continue; 1338864635ad7b3046d3042311423071152c613961deChris Lattner } 1339864635ad7b3046d3042311423071152c613961deChris Lattner 13404e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Check to see if this register is allocatable (i.e. don't give out the 13414e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // stack pointer). 13429b6fb5de49f30d03b3e3f2fcb99e777b3149b783Chris Lattner const TargetRegisterClass *RC = isAllocatableRegister(Reg, MF, TLI, MRI); 1343864635ad7b3046d3042311423071152c613961deChris Lattner if (!RC) { 1344864635ad7b3046d3042311423071152c613961deChris Lattner // Make sure we find consecutive registers. 1345864635ad7b3046d3042311423071152c613961deChris Lattner NumAllocated = 0; 1346864635ad7b3046d3042311423071152c613961deChris Lattner continue; 13474e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 13484e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 1349864635ad7b3046d3042311423071152c613961deChris Lattner // Okay, this register is good, we can use it. 1350864635ad7b3046d3042311423071152c613961deChris Lattner ++NumAllocated; 1351864635ad7b3046d3042311423071152c613961deChris Lattner 1352864635ad7b3046d3042311423071152c613961deChris Lattner // If we allocated enough consecutive 1353864635ad7b3046d3042311423071152c613961deChris Lattner if (NumAllocated == NumRegs) { 1354864635ad7b3046d3042311423071152c613961deChris Lattner unsigned RegStart = (i-NumAllocated)+1; 1355864635ad7b3046d3042311423071152c613961deChris Lattner unsigned RegEnd = i+1; 1356864635ad7b3046d3042311423071152c613961deChris Lattner // Mark all of the allocated registers used. 1357864635ad7b3046d3042311423071152c613961deChris Lattner for (unsigned i = RegStart; i != RegEnd; ++i) { 1358864635ad7b3046d3042311423071152c613961deChris Lattner unsigned Reg = RegClassRegs[i]; 1359864635ad7b3046d3042311423071152c613961deChris Lattner Regs.push_back(Reg); 1360864635ad7b3046d3042311423071152c613961deChris Lattner if (isOutReg) OutputRegs.insert(Reg); // Mark reg used. 1361864635ad7b3046d3042311423071152c613961deChris Lattner if (isInReg) InputRegs.insert(Reg); // Mark reg used. 1362864635ad7b3046d3042311423071152c613961deChris Lattner } 1363864635ad7b3046d3042311423071152c613961deChris Lattner 1364864635ad7b3046d3042311423071152c613961deChris Lattner return RegsForValue(Regs, *RC->vt_begin(), VT); 1365864635ad7b3046d3042311423071152c613961deChris Lattner } 13664e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 1367864635ad7b3046d3042311423071152c613961deChris Lattner 1368864635ad7b3046d3042311423071152c613961deChris Lattner // Otherwise, we couldn't allocate enough registers for this. 1369864635ad7b3046d3042311423071152c613961deChris Lattner return RegsForValue(); 13704e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner} 13714e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 1372864635ad7b3046d3042311423071152c613961deChris Lattner 1373ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner/// visitInlineAsm - Handle a call to an InlineAsm object. 1374ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner/// 1375ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattnervoid SelectionDAGLowering::visitInlineAsm(CallInst &I) { 1376ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner InlineAsm *IA = cast<InlineAsm>(I.getOperand(0)); 1377ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1378ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand AsmStr = DAG.getTargetExternalSymbol(IA->getAsmString().c_str(), 1379ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner MVT::Other); 1380ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1381ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // Note, we treat inline asms both with and without side-effects as the same. 1382ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // If an inline asm doesn't have side effects and doesn't access memory, we 1383ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // could not choose to not chain it. 1384ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner bool hasSideEffects = IA->hasSideEffects(); 1385ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 13862cc2f66c25d9576743026688fdae5ed402726532Chris Lattner std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints(); 13871efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner std::vector<MVT::ValueType> ConstraintVTs; 1388ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1389ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// AsmNodeOperands - A list of pairs. The first element is a register, the 1390ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// second is a bitfield where bit #0 is set if it is a use and bit #1 is set 1391ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// if it is a def of that register. 1392ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner std::vector<SDOperand> AsmNodeOperands; 1393ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands.push_back(SDOperand()); // reserve space for input chain 1394ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands.push_back(AsmStr); 1395ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1396ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand Chain = getRoot(); 1397ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand Flag; 1398ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 13994e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We fully assign registers here at isel time. This is not optimal, but 14004e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // should work. For register classes that correspond to LLVM classes, we 14014e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // could let the LLVM RA do its thing, but we currently don't. Do a prepass 14024e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // over the constraints, collecting fixed registers that we know we can't use. 14034e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> OutputRegs, InputRegs; 14041efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner unsigned OpNum = 1; 14054e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner for (unsigned i = 0, e = Constraints.size(); i != e; ++i) { 14064e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner assert(Constraints[i].Codes.size() == 1 && "Only handles one code so far!"); 14074e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::string &ConstraintCode = Constraints[i].Codes[0]; 14082223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 14091efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner MVT::ValueType OpVT; 14101efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 14111efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner // Compute the value type for each operand and add it to ConstraintVTs. 14121efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner switch (Constraints[i].Type) { 14131efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isOutput: 14141efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner if (!Constraints[i].isIndirectOutput) { 14151efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner assert(I.getType() != Type::VoidTy && "Bad inline asm!"); 14161efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = TLI.getValueType(I.getType()); 14171efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner } else { 141822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner const Type *OpTy = I.getOperand(OpNum)->getType(); 14191efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = TLI.getValueType(cast<PointerType>(OpTy)->getElementType()); 14201efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpNum++; // Consumes a call operand. 14211efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner } 14221efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 14231efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isInput: 14241efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = TLI.getValueType(I.getOperand(OpNum)->getType()); 14251efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpNum++; // Consumes a call operand. 14261efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 14271efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isClobber: 14281efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpVT = MVT::Other; 14291efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 14301efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner } 14311efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 14321efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner ConstraintVTs.push_back(OpVT); 14331efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 1434864635ad7b3046d3042311423071152c613961deChris Lattner if (TLI.getRegForInlineAsmConstraint(ConstraintCode, OpVT).first == 0) 1435864635ad7b3046d3042311423071152c613961deChris Lattner continue; // Not assigned a fixed reg. 14361efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 1437864635ad7b3046d3042311423071152c613961deChris Lattner // Build a list of regs that this operand uses. This always has a single 1438864635ad7b3046d3042311423071152c613961deChris Lattner // element for promoted/expanded operands. 1439864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue Regs = GetRegistersForValue(ConstraintCode, OpVT, 1440864635ad7b3046d3042311423071152c613961deChris Lattner false, false, 1441864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs, InputRegs); 14424e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 14434e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner switch (Constraints[i].Type) { 14444e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isOutput: 14454e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We can't assign any other output to this register. 1446864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 14474e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // If this is an early-clobber output, it cannot be assigned to the same 14484e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // value as the input reg. 14492223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (Constraints[i].isEarlyClobber || Constraints[i].hasMatchingInput) 1450864635ad7b3046d3042311423071152c613961deChris Lattner InputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 14514e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 14521efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner case InlineAsm::isInput: 14531efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner // We can't assign any other input to this register. 1454864635ad7b3046d3042311423071152c613961deChris Lattner InputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 14551efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner break; 14564e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isClobber: 14574e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Clobbered regs cannot be used as inputs or outputs. 1458864635ad7b3046d3042311423071152c613961deChris Lattner InputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 1459864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs.insert(Regs.Regs.begin(), Regs.Regs.end()); 14604e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 14614e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 14624e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 14632cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 14640f0b7d4927e56e622cf43da0db56f3e0d40b8aafChris Lattner // Loop over all of the inputs, copying the operand values into the 14650f0b7d4927e56e622cf43da0db56f3e0d40b8aafChris Lattner // appropriate registers and processing the output regs. 1466864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue RetValRegs; 1467864635ad7b3046d3042311423071152c613961deChris Lattner std::vector<std::pair<RegsForValue, Value*> > IndirectStoresToEmit; 14681efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner OpNum = 1; 14690f0b7d4927e56e622cf43da0db56f3e0d40b8aafChris Lattner 14706656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = Constraints.size(); i != e; ++i) { 14712cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(Constraints[i].Codes.size() == 1 && "Only handles one code so far!"); 14722cc2f66c25d9576743026688fdae5ed402726532Chris Lattner std::string &ConstraintCode = Constraints[i].Codes[0]; 14731efa40f6a4b561cf8f80fe018684236010645cd0Chris Lattner 14742cc2f66c25d9576743026688fdae5ed402726532Chris Lattner switch (Constraints[i].Type) { 14752cc2f66c25d9576743026688fdae5ed402726532Chris Lattner case InlineAsm::isOutput: { 147622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner TargetLowering::ConstraintType CTy = TargetLowering::C_RegisterClass; 147722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (ConstraintCode.size() == 1) // not a physreg name. 147822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner CTy = TLI.getConstraintType(ConstraintCode[0]); 147922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 148022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (CTy == TargetLowering::C_Memory) { 148122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Memory output. 148222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner SDOperand InOperandVal = getValue(I.getOperand(OpNum)); 148322873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 148422873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Check that the operand (the address to store to) isn't a float. 148522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (!MVT::isInteger(InOperandVal.getValueType())) 148622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner assert(0 && "MATCH FAIL!"); 148722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 148822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (!Constraints[i].isIndirectOutput) 148922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner assert(0 && "MATCH FAIL!"); 149022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 149122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner OpNum++; // Consumes a call operand. 149222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 149322873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Extend/truncate to the right pointer type if needed. 149422873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner MVT::ValueType PtrType = TLI.getPointerTy(); 149522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner if (InOperandVal.getValueType() < PtrType) 149622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner InOperandVal = DAG.getNode(ISD::ZERO_EXTEND, PtrType, InOperandVal); 149722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner else if (InOperandVal.getValueType() > PtrType) 149822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner InOperandVal = DAG.getNode(ISD::TRUNCATE, PtrType, InOperandVal); 149922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 150022873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Add information to the INLINEASM node to know about this output. 150122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner unsigned ResOpType = 4/*MEM*/ | (1 << 3); 150222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 150322873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner AsmNodeOperands.push_back(InOperandVal); 150422873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner break; 150522873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner } 150622873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 150722873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner // Otherwise, this is a register output. 150822873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner assert(CTy == TargetLowering::C_RegisterClass && "Unknown op type!"); 150922873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner 1510864635ad7b3046d3042311423071152c613961deChris Lattner // If this is an early-clobber output, or if there is an input 1511864635ad7b3046d3042311423071152c613961deChris Lattner // constraint that matches this, we need to reserve the input register 1512864635ad7b3046d3042311423071152c613961deChris Lattner // so no other inputs allocate to it. 1513864635ad7b3046d3042311423071152c613961deChris Lattner bool UsesInputRegister = false; 1514864635ad7b3046d3042311423071152c613961deChris Lattner if (Constraints[i].isEarlyClobber || Constraints[i].hasMatchingInput) 1515864635ad7b3046d3042311423071152c613961deChris Lattner UsesInputRegister = true; 15162223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 1517864635ad7b3046d3042311423071152c613961deChris Lattner // Copy the output from the appropriate register. Find a register that 1518864635ad7b3046d3042311423071152c613961deChris Lattner // we can use. 1519864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue Regs = 1520864635ad7b3046d3042311423071152c613961deChris Lattner GetRegistersForValue(ConstraintCode, ConstraintVTs[i], 1521864635ad7b3046d3042311423071152c613961deChris Lattner true, UsesInputRegister, 1522864635ad7b3046d3042311423071152c613961deChris Lattner OutputRegs, InputRegs); 1523864635ad7b3046d3042311423071152c613961deChris Lattner assert(!Regs.Regs.empty() && "Couldn't allocate output reg!"); 15242cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 15252cc2f66c25d9576743026688fdae5ed402726532Chris Lattner if (!Constraints[i].isIndirectOutput) { 1526864635ad7b3046d3042311423071152c613961deChris Lattner assert(RetValRegs.Regs.empty() && 15272cc2f66c25d9576743026688fdae5ed402726532Chris Lattner "Cannot have multiple output constraints yet!"); 15282cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(I.getType() != Type::VoidTy && "Bad inline asm!"); 1529864635ad7b3046d3042311423071152c613961deChris Lattner RetValRegs = Regs; 15302cc2f66c25d9576743026688fdae5ed402726532Chris Lattner } else { 153122873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner IndirectStoresToEmit.push_back(std::make_pair(Regs, 153222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner I.getOperand(OpNum))); 15332cc2f66c25d9576743026688fdae5ed402726532Chris Lattner OpNum++; // Consumes a call operand. 15342cc2f66c25d9576743026688fdae5ed402726532Chris Lattner } 15356656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 15366656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Add information to the INLINEASM node to know that this register is 15376656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // set. 1538c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner Regs.AddInlineAsmOperands(2 /*REGDEF*/, DAG, AsmNodeOperands); 15396656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 15406656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 15416656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner case InlineAsm::isInput: { 154222873462c965a57664c4e375aa6e8bf02c9c6ad8Chris Lattner SDOperand InOperandVal = getValue(I.getOperand(OpNum)); 15434e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner OpNum++; // Consumes a call operand. 15443d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 15452223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (isdigit(ConstraintCode[0])) { // Matching constraint? 15462223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // If this is required to match an output register we have already set, 15472223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // just use its register. 15482223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner unsigned OperandNo = atoi(ConstraintCode.c_str()); 15493d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 1550c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Scan until we find the definition we already emitted of this operand. 1551c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // When we find it, create a RegsForValue operand. 1552c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned CurOp = 2; // The first operand. 1553c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner for (; OperandNo; --OperandNo) { 1554c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Advance to the next operand. 1555c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned NumOps = 1556c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner cast<ConstantSDNode>(AsmNodeOperands[CurOp])->getValue(); 1557c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner assert((NumOps & 7) == 2 /*REGDEF*/ && 1558c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner "Skipped past definitions?"); 1559c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner CurOp += (NumOps>>3)+1; 1560c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1561c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 1562c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned NumOps = 1563c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner cast<ConstantSDNode>(AsmNodeOperands[CurOp])->getValue(); 1564c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner assert((NumOps & 7) == 2 /*REGDEF*/ && 1565c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner "Skipped past definitions?"); 1566c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 1567c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Add NumOps>>3 registers to MatchedRegs. 1568c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner RegsForValue MatchedRegs; 1569c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.ValueVT = InOperandVal.getValueType(); 1570c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.RegVT = AsmNodeOperands[CurOp+1].getValueType(); 1571c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner for (unsigned i = 0, e = NumOps>>3; i != e; ++i) { 1572c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner unsigned Reg=cast<RegisterSDNode>(AsmNodeOperands[++CurOp])->getReg(); 1573c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.Regs.push_back(Reg); 1574c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 1575c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 1576c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Use the produced MatchedRegs object to 1577c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.getCopyToRegs(InOperandVal, DAG, Chain, Flag); 1578c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner MatchedRegs.AddInlineAsmOperands(1 /*REGUSE*/, DAG, AsmNodeOperands); 157987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner break; 158087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner } 158187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 158287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner TargetLowering::ConstraintType CTy = TargetLowering::C_RegisterClass; 158387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (ConstraintCode.size() == 1) // not a physreg name. 158487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner CTy = TLI.getConstraintType(ConstraintCode[0]); 15853d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 158687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (CTy == TargetLowering::C_Other) { 158787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (!TLI.isOperandValidForConstraint(InOperandVal, ConstraintCode[0])) 158887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(0 && "MATCH FAIL!"); 1589c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 159087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Add information to the INLINEASM node to know about this input. 159187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner unsigned ResOpType = 3 /*IMM*/ | (1 << 3); 159287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 159387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(InOperandVal); 159487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner break; 159587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner } else if (CTy == TargetLowering::C_Memory) { 159687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Memory input. 159787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 159887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Check that the operand isn't a float. 159987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (!MVT::isInteger(InOperandVal.getValueType())) 160087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(0 && "MATCH FAIL!"); 1601c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner 160287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Extend/truncate to the right pointer type if needed. 160387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner MVT::ValueType PtrType = TLI.getPointerTy(); 160487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner if (InOperandVal.getValueType() < PtrType) 160587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InOperandVal = DAG.getNode(ISD::ZERO_EXTEND, PtrType, InOperandVal); 160687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner else if (InOperandVal.getValueType() > PtrType) 160787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InOperandVal = DAG.getNode(ISD::TRUNCATE, PtrType, InOperandVal); 160887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 160987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Add information to the INLINEASM node to know about this input. 161087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner unsigned ResOpType = 4/*MEM*/ | (1 << 3); 161187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 161287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner AsmNodeOperands.push_back(InOperandVal); 1613c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner break; 16142223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner } 161587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 161687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(CTy == TargetLowering::C_RegisterClass && "Unknown op type!"); 161787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 161887bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // Copy the input into the appropriate registers. 161987bc3bd1213ced06eade93e3267178198d41a381Chris Lattner RegsForValue InRegs = 162087bc3bd1213ced06eade93e3267178198d41a381Chris Lattner GetRegistersForValue(ConstraintCode, ConstraintVTs[i], 162187bc3bd1213ced06eade93e3267178198d41a381Chris Lattner false, true, OutputRegs, InputRegs); 162287bc3bd1213ced06eade93e3267178198d41a381Chris Lattner // FIXME: should be match fail. 162387bc3bd1213ced06eade93e3267178198d41a381Chris Lattner assert(!InRegs.Regs.empty() && "Couldn't allocate input reg!"); 162487bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 162587bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InRegs.getCopyToRegs(InOperandVal, DAG, Chain, Flag); 162687bc3bd1213ced06eade93e3267178198d41a381Chris Lattner 162787bc3bd1213ced06eade93e3267178198d41a381Chris Lattner InRegs.AddInlineAsmOperands(1/*REGUSE*/, DAG, AsmNodeOperands); 16286656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 16296656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1630c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner case InlineAsm::isClobber: { 1631c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner RegsForValue ClobberedRegs = 1632c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner GetRegistersForValue(ConstraintCode, MVT::Other, false, false, 1633c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner OutputRegs, InputRegs); 1634c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // Add the clobbered value to the operand list, so that the register 1635c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner // allocator is aware that the physreg got clobbered. 1636c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner if (!ClobberedRegs.Regs.empty()) 1637c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner ClobberedRegs.AddInlineAsmOperands(2/*REGDEF*/, DAG, AsmNodeOperands); 16386656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 16396656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1640c3a9f8d31ce93ba384bd2bbdd55c757b06600a15Chris Lattner } 16416656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1642ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1643ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // Finish up input operands. 1644ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands[0] = Chain; 1645ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner if (Flag.Val) AsmNodeOperands.push_back(Flag); 1646ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1647ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner std::vector<MVT::ValueType> VTs; 1648ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner VTs.push_back(MVT::Other); 1649ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner VTs.push_back(MVT::Flag); 1650ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner Chain = DAG.getNode(ISD::INLINEASM, VTs, AsmNodeOperands); 1651ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner Flag = Chain.getValue(1); 1652ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 16536656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // If this asm returns a register value, copy the result from that register 16546656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // and set it as the value of the call. 1655864635ad7b3046d3042311423071152c613961deChris Lattner if (!RetValRegs.Regs.empty()) 1656864635ad7b3046d3042311423071152c613961deChris Lattner setValue(&I, RetValRegs.getCopyFromRegs(DAG, Chain, Flag)); 16576656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 16586656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<std::pair<SDOperand, Value*> > StoresToEmit; 16596656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 16606656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Process indirect outputs, first output all of the flagged copies out of 16616656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // physregs. 16626656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = IndirectStoresToEmit.size(); i != e; ++i) { 1663864635ad7b3046d3042311423071152c613961deChris Lattner RegsForValue &OutRegs = IndirectStoresToEmit[i].first; 16646656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Value *Ptr = IndirectStoresToEmit[i].second; 1665864635ad7b3046d3042311423071152c613961deChris Lattner SDOperand OutVal = OutRegs.getCopyFromRegs(DAG, Chain, Flag); 1666864635ad7b3046d3042311423071152c613961deChris Lattner StoresToEmit.push_back(std::make_pair(OutVal, Ptr)); 16676656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1668ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 16696656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Emit the non-flagged stores from the physregs. 16706656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<SDOperand> OutChains; 16716656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = StoresToEmit.size(); i != e; ++i) 16726656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner OutChains.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, 16736656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner StoresToEmit[i].first, 16746656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner getValue(StoresToEmit[i].second), 16756656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner DAG.getSrcValue(StoresToEmit[i].second))); 16766656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner if (!OutChains.empty()) 16776656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains); 1678ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner DAG.setRoot(Chain); 1679ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner} 1680ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1681ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 16821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitMalloc(MallocInst &I) { 16831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(I.getOperand(0)); 16841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 16851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 168668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner 168768cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < Src.getValueType()) 168868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::TRUNCATE, IntPtr, Src); 168968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > Src.getValueType()) 169068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Src); 16911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 16921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Scale the source by the type size. 16931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t ElementSize = TD.getTypeSize(I.getType()->getElementType()); 16941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src = DAG.getNode(ISD::MUL, Src.getValueType(), 16951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src, getIntPtrConstant(ElementSize)); 16961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 16971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 16981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(Src, TLI.getTargetData().getIntPtrType())); 1699cf5734dddd66af9388a171b44996505ede47feedChris Lattner 1700cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 1701adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), I.getType(), false, CallingConv::C, true, 1702cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("malloc", IntPtr), 1703cf5734dddd66af9388a171b44996505ede47feedChris Lattner Args, DAG); 1704cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); // Pointers always fit in registers 1705cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 17061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitFree(FreeInst &I) { 17091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 17101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(getValue(I.getOperand(0)), 17111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetData().getIntPtrType())); 17121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 1713cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 1714adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), Type::VoidTy, false, CallingConv::C, true, 1715cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("free", IntPtr), Args, DAG); 1716cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 17171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1719025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// InsertAtEndOfBasicBlock - This method should be implemented by targets that 1720025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// mark instructions with the 'usesCustomDAGSchedInserter' flag. These 1721025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// instructions are special in various ways, which require special support to 1722025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// insert. The specified MachineInstr is created but not inserted into any 1723025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// basic blocks, and the scheduler passes ownership of it to this method. 1724025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris LattnerMachineBasicBlock *TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI, 1725025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner MachineBasicBlock *MBB) { 1726025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner std::cerr << "If a target marks an instruction with " 1727025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "'usesCustomDAGSchedInserter', it must implement " 1728025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "TargetLowering::InsertAtEndOfBasicBlock!\n"; 1729025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner abort(); 1730025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner return 0; 1731025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner} 1732025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner 173339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitVAStart(CallInst &I) { 1734acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VASTART, MVT::Other, getRoot(), 1735acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1736acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)))); 173739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 173839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 17391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAArg(VAArgInst &I) { 1740acc398c195a697795bff3245943d104eb19192b9Nate Begeman SDOperand V = DAG.getVAArg(TLI.getValueType(I.getType()), getRoot(), 1741acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(0)), 1742acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(0))); 1743acc398c195a697795bff3245943d104eb19192b9Nate Begeman setValue(&I, V); 1744acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(V.getValue(1)); 17451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAEnd(CallInst &I) { 1748acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VAEND, MVT::Other, getRoot(), 1749acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1750acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)))); 17511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVACopy(CallInst &I) { 1754acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VACOPY, MVT::Other, getRoot(), 1755acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1756acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(2)), 1757acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)), 1758acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(2)))); 17591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 176139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// It is always conservatively correct for llvm.returnaddress and 176239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// llvm.frameaddress to return 0. 176339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand, SDOperand> 176439ae3622791986a0232f7e4797b633f8fa9e54d2Chris LattnerTargetLowering::LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, 176539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth, SelectionDAG &DAG) { 176639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return std::make_pair(DAG.getConstant(0, getPointerTy()), Chain); 17671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 176950381b6c4180e9a2b983d4623da2e485cd768632Chris LattnerSDOperand TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { 1770171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner assert(0 && "LowerOperation not implemented for this target!"); 1771171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner abort(); 1772d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return SDOperand(); 1773171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner} 1774171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner 17750aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate BegemanSDOperand TargetLowering::CustomPromoteOperation(SDOperand Op, 17760aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman SelectionDAG &DAG) { 17770aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman assert(0 && "CustomPromoteOperation not implemented for this target!"); 17780aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman abort(); 17790aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman return SDOperand(); 17800aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman} 17810aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman 178239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitFrameReturnAddress(CallInst &I, bool isFrame) { 178339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth = (unsigned)cast<ConstantUInt>(I.getOperand(1))->getValue(); 178439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 1785a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner TLI.LowerFrameReturnAddress(isFrame, getRoot(), Depth, DAG); 178639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 178739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 178839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 17891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 179074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// getMemsetValue - Vectorized representation of the memset value 17911db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng/// operand. 17921db92f947cc600dee5edb9305a4e0f1c5c872965Evan Chengstatic SDOperand getMemsetValue(SDOperand Value, MVT::ValueType VT, 1793a47876d87a84fa94bf9f09cfef6756223575611dEvan Cheng SelectionDAG &DAG) { 17941db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType CurVT = VT; 17951db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Value)) { 17961db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng uint64_t Val = C->getValue() & 255; 17971db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Shift = 8; 17981db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (CurVT != MVT::i8) { 17991db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Val = (Val << Shift) | Val; 18001db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Shift <<= 1; 18011db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng CurVT = (MVT::ValueType)((unsigned)CurVT - 1); 18021db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 18031db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return DAG.getConstant(Val, VT); 18041db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } else { 18051db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Value = DAG.getNode(ISD::ZERO_EXTEND, VT, Value); 18061db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Shift = 8; 18071db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (CurVT != MVT::i8) { 18081db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Value = 18091db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getNode(ISD::OR, VT, 18101db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getNode(ISD::SHL, VT, Value, 18111db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getConstant(Shift, MVT::i8)), Value); 18121db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Shift <<= 1; 18131db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng CurVT = (MVT::ValueType)((unsigned)CurVT - 1); 18141db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 18151db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 18161db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return Value; 18171db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 18181db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 18191db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 182074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// getMemsetStringVal - Similar to getMemsetValue. Except this is only 182174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// used when a memcpy is turned into a memset when the source is a constant 182274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// string ptr. 182374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Chengstatic SDOperand getMemsetStringVal(MVT::ValueType VT, 182474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SelectionDAG &DAG, TargetLowering &TLI, 182574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string &Str, unsigned Offset) { 182674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng MVT::ValueType CurVT = VT; 182774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng uint64_t Val = 0; 182874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng unsigned MSB = getSizeInBits(VT) / 8; 182974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (TLI.isLittleEndian()) 183074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Offset = Offset + MSB - 1; 183174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng for (unsigned i = 0; i != MSB; ++i) { 183274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Val = (Val << 8) | Str[Offset]; 183374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Offset += TLI.isLittleEndian() ? -1 : 1; 183474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 183574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng return DAG.getConstant(Val, VT); 183674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng} 183774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 18381db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng/// getMemBasePlusOffset - Returns base and offset node for the 18391db92f947cc600dee5edb9305a4e0f1c5c872965Evan Chengstatic SDOperand getMemBasePlusOffset(SDOperand Base, unsigned Offset, 18401db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SelectionDAG &DAG, TargetLowering &TLI) { 18411db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT = Base.getValueType(); 18421db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return DAG.getNode(ISD::ADD, VT, Base, DAG.getConstant(Offset, VT)); 18431db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 18441db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 1845c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng/// MeetsMaxMemopRequirement - Determines if the number of memory ops required 184680e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng/// to replace the memset / memcpy is below the threshold. It also returns the 184780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng/// types of the sequence of memory ops to perform memset / memcpy. 1848c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Chengstatic bool MeetsMaxMemopRequirement(std::vector<MVT::ValueType> &MemOps, 1849c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng unsigned Limit, uint64_t Size, 1850c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng unsigned Align, TargetLowering &TLI) { 18511db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT; 18521db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 18531db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (TLI.allowsUnalignedMemoryAccesses()) { 18541db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i64; 18551db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } else { 18561db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng switch (Align & 7) { 18571db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 0: 18581db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i64; 18591db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 18601db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 4: 18611db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i32; 18621db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 18631db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 2: 18641db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i16; 18651db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 18661db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng default: 18671db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i8; 18681db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 18691db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 18701db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 18711db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 187280e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng MVT::ValueType LVT = MVT::i64; 187380e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng while (!TLI.isTypeLegal(LVT)) 187480e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng LVT = (MVT::ValueType)((unsigned)LVT - 1); 187580e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng assert(MVT::isInteger(LVT)); 18761db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 187780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng if (VT > LVT) 187880e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng VT = LVT; 187980e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 1880dea7245997f37972ed2f94d4ca1ec50c5af5000aEvan Cheng unsigned NumMemOps = 0; 18811db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (Size != 0) { 18821db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 18831db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (VTSize > Size) { 18841db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = (MVT::ValueType)((unsigned)VT - 1); 18851db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VTSize >>= 1; 18861db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 188780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng assert(MVT::isInteger(VT)); 188880e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 188980e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng if (++NumMemOps > Limit) 189080e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng return false; 18911db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MemOps.push_back(VT); 18921db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Size -= VTSize; 18931db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 189480e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 189580e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng return true; 18961db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 18971db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 18987041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattnervoid SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) { 18991db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op1 = getValue(I.getOperand(1)); 19001db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op2 = getValue(I.getOperand(2)); 19011db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op3 = getValue(I.getOperand(3)); 19021db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op4 = getValue(I.getOperand(4)); 19031db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Align = (unsigned)cast<ConstantSDNode>(Op4)->getValue(); 19041db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (Align == 0) Align = 1; 19051db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19061db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (ConstantSDNode *Size = dyn_cast<ConstantSDNode>(Op3)) { 19071db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng std::vector<MVT::ValueType> MemOps; 19081db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19091db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng // Expand memset / memcpy to a series of load / store ops 19101db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng // if the size operand falls below a certain threshold. 19111db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng std::vector<SDOperand> OutChains; 19121db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng switch (Op) { 1913ac940ab1bf21be40f74a83b202419a20ad2e279fEvan Cheng default: break; // Do nothing for now. 19141db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case ISD::MEMSET: { 1915c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemset(), 1916c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng Size->getValue(), Align, TLI)) { 191780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng unsigned NumMemOps = MemOps.size(); 19181db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Offset = 0; 19191db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng for (unsigned i = 0; i < NumMemOps; i++) { 19201db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT = MemOps[i]; 19211db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 1922a47876d87a84fa94bf9f09cfef6756223575611dEvan Cheng SDOperand Value = getMemsetValue(Op2, VT, DAG); 1923c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, getRoot(), 1924c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Value, 1925864635ad7b3046d3042311423071152c613961deChris Lattner getMemBasePlusOffset(Op1, Offset, DAG, TLI), 1926864635ad7b3046d3042311423071152c613961deChris Lattner DAG.getSrcValue(I.getOperand(1), Offset)); 1927c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng OutChains.push_back(Store); 1928c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Offset += VTSize; 1929c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 1930c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 1931c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng break; 1932c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 1933c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng case ISD::MEMCPY: { 1934c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemcpy(), 1935c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Size->getValue(), Align, TLI)) { 1936c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng unsigned NumMemOps = MemOps.size(); 1937cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng unsigned SrcOff = 0, DstOff = 0, SrcDelta = 0; 193874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng GlobalAddressSDNode *G = NULL; 193974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string Str; 1940cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng bool CopyFromStr = false; 194174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 194274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (Op2.getOpcode() == ISD::GlobalAddress) 194374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng G = cast<GlobalAddressSDNode>(Op2); 194474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng else if (Op2.getOpcode() == ISD::ADD && 194574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Op2.getOperand(0).getOpcode() == ISD::GlobalAddress && 194674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Op2.getOperand(1).getOpcode() == ISD::Constant) { 194774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng G = cast<GlobalAddressSDNode>(Op2.getOperand(0)); 1948cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng SrcDelta = cast<ConstantSDNode>(Op2.getOperand(1))->getValue(); 194974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 195074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (G) { 195174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng GlobalVariable *GV = dyn_cast<GlobalVariable>(G->getGlobal()); 1952cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng if (GV) { 195321b6c9d6477c8df3f884c3f1ebeaaa44dd53aafeJim Laskey Str = GV->getStringValue(); 1954cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng if (!Str.empty()) { 1955cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng CopyFromStr = true; 1956cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng SrcOff += SrcDelta; 1957cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng } 1958cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng } 195974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 196074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 1961c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng for (unsigned i = 0; i < NumMemOps; i++) { 1962c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng MVT::ValueType VT = MemOps[i]; 1963c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 196474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SDOperand Value, Chain, Store; 196574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 1966cffbb5174f283d123d6bfc582292f4a9c84cb3edEvan Cheng if (CopyFromStr) { 196774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Value = getMemsetStringVal(VT, DAG, TLI, Str, SrcOff); 196874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Chain = getRoot(); 196974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Store = 197074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, 197174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op1, DstOff, DAG, TLI), 197274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(1), DstOff)); 197374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } else { 197474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Value = DAG.getLoad(VT, getRoot(), 197574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op2, SrcOff, DAG, TLI), 197674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(2), SrcOff)); 197774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Chain = Value.getValue(1); 197874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Store = 197974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, 198074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op1, DstOff, DAG, TLI), 198174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(1), DstOff)); 198274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 1983c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng OutChains.push_back(Store); 198474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SrcOff += VTSize; 198574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DstOff += VTSize; 19861db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19871db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 1988c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng break; 19891db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19901db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 1991c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng 1992c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng if (!OutChains.empty()) { 1993c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains)); 1994c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng return; 1995c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 19961db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 19971db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 19987041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner std::vector<SDOperand> Ops; 1999a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner Ops.push_back(getRoot()); 20001db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op1); 20011db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op2); 20021db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op3); 20031db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op4); 20047041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner DAG.setRoot(DAG.getNode(Op, MVT::Other, Ops)); 20051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 20061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20077041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 20087041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner// SelectionDAGISel code 20097041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 20101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerunsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) { 20121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 20131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 20141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2015495a0b51915eb763576874f29192820b731edc22Chris Lattnervoid SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const { 201636b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // FIXME: we only modify the CFG to split critical edges. This 201736b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // updates dom and loop info. 2018495a0b51915eb763576874f29192820b731edc22Chris Lattner} 20191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2020c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2021c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// InsertGEPComputeCode - Insert code into BB to compute Ptr+PtrOffset, 2022c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// casting to the type of GEPI. 2023c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattnerstatic Value *InsertGEPComputeCode(Value *&V, BasicBlock *BB, Instruction *GEPI, 2024c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Ptr, Value *PtrOffset) { 2025c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (V) return V; // Already computed. 2026c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2027c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock::iterator InsertPt; 2028c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (BB == GEPI->getParent()) { 2029c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If insert into the GEP's block, insert right after the GEP. 2030c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner InsertPt = GEPI; 2031c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ++InsertPt; 2032c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } else { 2033c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Otherwise, insert at the top of BB, after any PHI nodes 2034c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner InsertPt = BB->begin(); 2035c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner while (isa<PHINode>(InsertPt)) ++InsertPt; 2036c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2037c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2038c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // If Ptr is itself a cast, but in some other BB, emit a copy of the cast into 2039c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // BB so that there is only one value live across basic blocks (the cast 2040c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // operand). 2041c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (CastInst *CI = dyn_cast<CastInst>(Ptr)) 2042c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (CI->getParent() != BB && isa<PointerType>(CI->getOperand(0)->getType())) 2043c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Ptr = new CastInst(CI->getOperand(0), CI->getType(), "", InsertPt); 2044c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 2045c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Add the offset, cast it to the right type. 2046c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = BinaryOperator::createAdd(Ptr, PtrOffset, "", InsertPt); 2047c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = new CastInst(Ptr, GEPI->getType(), "", InsertPt); 2048c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner return V = Ptr; 2049c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner} 2050c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2051c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2052c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// OptimizeGEPExpression - Since we are doing basic-block-at-a-time instruction 2053c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// selection, we want to be a bit careful about some things. In particular, if 2054c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// we have a GEP instruction that is used in a different block than it is 2055c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// defined, the addressing expression of the GEP cannot be folded into loads or 2056c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// stores that use it. In this case, decompose the GEP and move constant 2057c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// indices into blocks that use it. 2058c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattnerstatic void OptimizeGEPExpression(GetElementPtrInst *GEPI, 2059c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const TargetData &TD) { 2060c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If this GEP is only used inside the block it is defined in, there is no 2061c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // need to rewrite it. 2062c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner bool isUsedOutsideDefBB = false; 2063c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock *DefBB = GEPI->getParent(); 2064c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (Value::use_iterator UI = GEPI->use_begin(), E = GEPI->use_end(); 2065c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner UI != E; ++UI) { 2066c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (cast<Instruction>(*UI)->getParent() != DefBB) { 2067c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner isUsedOutsideDefBB = true; 2068c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner break; 2069c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2070c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2071c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (!isUsedOutsideDefBB) return; 2072c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2073c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If this GEP has no non-zero constant indices, there is nothing we can do, 2074c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // ignore it. 2075c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner bool hasConstantIndex = false; 2076c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (GetElementPtrInst::op_iterator OI = GEPI->op_begin()+1, 2077c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner E = GEPI->op_end(); OI != E; ++OI) { 2078c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(*OI)) 2079c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (CI->getRawValue()) { 2080c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner hasConstantIndex = true; 2081c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner break; 2082c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2083c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 20843802c2552fe4475418db3c948e7601d7259f996dChris Lattner // If this is a GEP &Alloca, 0, 0, forward subst the frame index into uses. 20853802c2552fe4475418db3c948e7601d7259f996dChris Lattner if (!hasConstantIndex && !isa<AllocaInst>(GEPI->getOperand(0))) return; 2086c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2087c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Otherwise, decompose the GEP instruction into multiplies and adds. Sum the 2088c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // constant offset (which we now know is non-zero) and deal with it later. 2089c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner uint64_t ConstantOffset = 0; 2090c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 2091c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Ptr = new CastInst(GEPI->getOperand(0), UIntPtrTy, "", GEPI); 2092c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const Type *Ty = GEPI->getOperand(0)->getType(); 2093c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2094c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (GetElementPtrInst::op_iterator OI = GEPI->op_begin()+1, 2095c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner E = GEPI->op_end(); OI != E; ++OI) { 2096c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Idx = *OI; 2097c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 2098c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 2099c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (Field) 2100c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset += TD.getStructLayout(StTy)->MemberOffsets[Field]; 2101c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ty = StTy->getElementType(Field); 2102c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } else { 2103c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 2104c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2105c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Handle constant subscripts. 2106c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 2107c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (CI->getRawValue() == 0) continue; 2108c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2109c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 2110c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset += (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 2111c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner else 2112c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset+=TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 2113c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner continue; 2114c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2115c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2116c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Ptr = Ptr + Idx * ElementSize; 2117c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2118c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Cast Idx to UIntPtrTy if needed. 2119c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Idx = new CastInst(Idx, UIntPtrTy, "", GEPI); 2120c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2121c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 2122c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Mask off bits that should not be set. 2123c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ElementSize &= ~0ULL >> (64-UIntPtrTy->getPrimitiveSizeInBits()); 2124c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Constant *SizeCst = ConstantUInt::get(UIntPtrTy, ElementSize); 2125c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2126c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Multiply by the element size and add to the base. 2127c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Idx = BinaryOperator::createMul(Idx, SizeCst, "", GEPI); 2128c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = BinaryOperator::createAdd(Ptr, Idx, "", GEPI); 2129c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2130c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2131c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2132c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Make sure that the offset fits in uintptr_t. 2133c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset &= ~0ULL >> (64-UIntPtrTy->getPrimitiveSizeInBits()); 2134c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Constant *PtrOffset = ConstantUInt::get(UIntPtrTy, ConstantOffset); 2135c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2136c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Okay, we have now emitted all of the variable index parts to the BB that 2137c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // the GEP is defined in. Loop over all of the using instructions, inserting 2138c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // an "add Ptr, ConstantOffset" into each block that uses it and update the 2139c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // instruction to use the newly computed value, making GEPI dead. When the 2140c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // user is a load or store instruction address, we emit the add into the user 2141c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // block, otherwise we use a canonical version right next to the gep (these 2142c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // won't be foldable as addresses, so we might as well share the computation). 2143c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 2144c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner std::map<BasicBlock*,Value*> InsertedExprs; 2145c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner while (!GEPI->use_empty()) { 2146c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Instruction *User = cast<Instruction>(GEPI->use_back()); 2147c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 2148c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // If this use is not foldable into the addressing mode, use a version 2149c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // emitted in the GEP block. 2150c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Value *NewVal; 2151c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (!isa<LoadInst>(User) && 2152c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner (!isa<StoreInst>(User) || User->getOperand(0) == GEPI)) { 2153c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner NewVal = InsertGEPComputeCode(InsertedExprs[DefBB], DefBB, GEPI, 2154c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Ptr, PtrOffset); 2155c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner } else { 2156c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // Otherwise, insert the code in the User's block so it can be folded into 2157c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // any users in that block. 2158c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner NewVal = InsertGEPComputeCode(InsertedExprs[User->getParent()], 2159c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner User->getParent(), GEPI, 2160c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr, PtrOffset); 2161c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 2162c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner User->replaceUsesOfWith(GEPI, NewVal); 2163c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner } 2164c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2165c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Finally, the GEP is dead, remove it. 2166c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner GEPI->eraseFromParent(); 2167c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner} 2168c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 21691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerbool SelectionDAGISel::runOnFunction(Function &Fn) { 21701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF = MachineFunction::construct(&Fn, TLI.getTargetMachine()); 21711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner RegMap = MF.getSSARegMap(); 21721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "\n\n\n=== " << Fn.getName() << "\n"); 21731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2174c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // First, split all critical edges for PHI nodes with incoming values that are 2175c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // constants, this way the load of the constant into a vreg will not be placed 2176c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // into MBBs that are used some other way. 2177c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // 2178c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // In this pass we also look for GEP instructions that are used across basic 2179c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // blocks and rewrites them to improve basic-block-at-a-time selection. 2180c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // 218136b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (Function::iterator BB = Fn.begin(), E = Fn.end(); BB != E; ++BB) { 218236b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner PHINode *PN; 2183c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock::iterator BBI; 2184c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (BBI = BB->begin(); (PN = dyn_cast<PHINode>(BBI)); ++BBI) 218536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) 218636b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner if (isa<Constant>(PN->getIncomingValue(i))) 218736b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner SplitCriticalEdge(PN->getIncomingBlock(i), BB); 2188c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 2189c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (BasicBlock::iterator E = BB->end(); BBI != E; ) 2190c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (GetElementPtrInst *GEPI = dyn_cast<GetElementPtrInst>(BBI++)) 2191c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner OptimizeGEPExpression(GEPI, TLI.getTargetData()); 219236b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner } 2193c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 21941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo FuncInfo(TLI, Fn, MF); 21951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) 21971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectBasicBlock(I, MF, FuncInfo); 2198edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 21991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 22001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 22011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 22021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2203ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerSDOperand SelectionDAGISel:: 2204ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerCopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) { 2205f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner SDOperand Op = SDL.getValue(V); 220618c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner assert((Op.getOpcode() != ISD::CopyFromReg || 2207d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && 220818c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner "Copy from a reg to the same reg!"); 2209d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 2210d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, we must make sure to not create an invalid 2211d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register use. 2212d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType SrcVT = Op.getValueType(); 2213d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(SrcVT); 2214d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SelectionDAG &DAG = SDL.DAG; 2215d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (SrcVT == DestVT) { 2216d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 2217d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else if (SrcVT < DestVT) { 2218d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is promoted to the register. 2219fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner if (MVT::isFloatingPoint(SrcVT)) 2220fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner Op = DAG.getNode(ISD::FP_EXTEND, DestVT, Op); 2221fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner else 2222fab08875b73656f373b10a59aad475615df82bafChris Lattner Op = DAG.getNode(ISD::ANY_EXTEND, DestVT, Op); 2223d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 2224d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 2225d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is expanded into multiple registers. 2226d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 2227d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(0, MVT::i32)); 2228d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 2229d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(1, MVT::i32)); 2230d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op = DAG.getCopyToReg(SDL.getRoot(), Reg, Lo); 2231d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(Op, Reg+1, Hi); 2232d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 22331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 22341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2235068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel:: 2236068a81e9fca511b9a3b3a0f28a8988a57f994652Chris LattnerLowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL, 2237068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> &UnorderedChains) { 22381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is the entry block, emit arguments. 2239068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner Function &F = *BB->getParent(); 22400afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FunctionLoweringInfo &FuncInfo = SDL.FuncInfo; 2241bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand OldRoot = SDL.DAG.getRoot(); 2242bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG); 2243bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2244bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner unsigned a = 0; 2245bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 2246bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner AI != E; ++AI, ++a) 2247bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!AI->use_empty()) { 2248bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDL.setValue(AI, Args[a]); 2249fa57702388f139e964befecb4b98c7dfe836945fChris Lattner 2250bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // If this argument is live outside of the entry block, insert a copy from 2251bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // whereever we got it to the vreg that other BB's will reference it as. 2252bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (FuncInfo.ValueMap.count(AI)) { 2253bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand Copy = 2254bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]); 2255bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner UnorderedChains.push_back(Copy); 2256bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner } 22570afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 2258bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2259bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Next, if the function has live ins that need to be copied into vregs, 2260bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // emit the copies now, into the top of the block. 2261bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MachineFunction &MF = SDL.DAG.getMachineFunction(); 2262bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (MF.livein_begin() != MF.livein_end()) { 2263bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SSARegMap *RegMap = MF.getSSARegMap(); 2264bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo(); 2265bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (MachineFunction::livein_iterator LI = MF.livein_begin(), 2266bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner E = MF.livein_end(); LI != E; ++LI) 2267bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LI->second) 2268bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MRI.copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second, 2269bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LI->first, RegMap->getRegClass(LI->second)); 22701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2271bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 2272bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Finally, if the target has anything special to do, allow it to do so. 2273bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner EmitFunctionEntryCode(F, SDL.DAG.getMachineFunction()); 2274068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner} 2275068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2276068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2277068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB, 2278068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate, 2279068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner FunctionLoweringInfo &FuncInfo) { 2280068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner SelectionDAGLowering SDL(DAG, TLI, FuncInfo); 2281068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2282068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> UnorderedChains; 2283edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 2284bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Lower any arguments needed in this block if this is the entry block. 2285bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LLVMBB == &LLVMBB->getParent()->front()) 2286bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LowerArguments(LLVMBB, SDL, UnorderedChains); 22871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 22881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BB = FuncInfo.MBBMap[LLVMBB]; 22891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.setCurrentBasicBlock(BB); 22901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 22911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower all of the non-terminator instructions. 22921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = --LLVMBB->end(); 22931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner I != E; ++I) 22941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*I); 22951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 22961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Ensure that all instructions which are used outside of their defining 22971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // blocks are available as virtual registers. 22981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = LLVMBB->end(); I != E;++I) 2299f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner if (!I->use_empty() && !isa<PHINode>(I)) { 2300ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner std::map<const Value*, unsigned>::iterator VMI =FuncInfo.ValueMap.find(I); 23011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (VMI != FuncInfo.ValueMap.end()) 2302ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2303ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, I, VMI->second)); 23041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 23051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle PHI nodes in successor blocks. Emit code into the SelectionDAG to 23071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // ensure constants are generated when needed. Remember the virtual registers 23081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // that need to be added to the Machine PHI nodes as input. We cannot just 23091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // directly add them, because expansion might result in multiple MBB's for one 23101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // BB. As such, the start of the BB might correspond to a different MBB than 23111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the end. 2312edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman // 23131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Emit constants only once even if used by multiple PHI nodes. 23151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<Constant*, unsigned> ConstantsOut; 23161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Check successor nodes PHI nodes that expect a constant to be available from 23181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // this block. 23191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 23201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 23211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *SuccBB = TI->getSuccessor(succ); 23221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock::iterator MBBI = FuncInfo.MBBMap[SuccBB]->begin(); 23231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 23241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // At this point we know that there is a 1-1 correspondence between LLVM PHI 23261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // nodes and Machine PHI nodes, but the incoming operands have not been 23271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // emitted yet. 23281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = SuccBB->begin(); 2329f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 2330f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 2331f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned Reg; 2332f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 2333f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (Constant *C = dyn_cast<Constant>(PHIOp)) { 2334f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned &RegOut = ConstantsOut[C]; 2335f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (RegOut == 0) { 2336f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner RegOut = FuncInfo.CreateRegForValue(C); 2337ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2338ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, C, RegOut)); 2339f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2340f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = RegOut; 2341f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } else { 2342f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = FuncInfo.ValueMap[PHIOp]; 2343ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner if (Reg == 0) { 2344edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman assert(isa<AllocaInst>(PHIOp) && 2345ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && 2346ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner "Didn't codegen value into a register!??"); 2347ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner Reg = FuncInfo.CreateRegForValue(PHIOp); 2348ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2349ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, PHIOp, Reg)); 2350ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner } 23511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2352edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 2353f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // Remember that this register needs to added to the machine PHI node as 2354f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // the input for this MBB. 2355f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 2356f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 2357f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0, e = NumElements; i != e; ++i) 2358f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg+i)); 23591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 23601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 23611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ConstantsOut.clear(); 23621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2363ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner // Turn all of the unordered chains into one factored node. 23645a6c6d98d561df671350a56c8031a3611f1c46faChris Lattner if (!UnorderedChains.empty()) { 23657436b57de32333cc337b8c7cea208c8863eee793Chris Lattner SDOperand Root = SDL.getRoot(); 23667436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (Root.getOpcode() != ISD::EntryToken) { 23677436b57de32333cc337b8c7cea208c8863eee793Chris Lattner unsigned i = 0, e = UnorderedChains.size(); 23687436b57de32333cc337b8c7cea208c8863eee793Chris Lattner for (; i != e; ++i) { 23697436b57de32333cc337b8c7cea208c8863eee793Chris Lattner assert(UnorderedChains[i].Val->getNumOperands() > 1); 23707436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (UnorderedChains[i].Val->getOperand(0) == Root) 23717436b57de32333cc337b8c7cea208c8863eee793Chris Lattner break; // Don't add the root if we already indirectly depend on it. 23727436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 23737436b57de32333cc337b8c7cea208c8863eee793Chris Lattner 23747436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (i == e) 23757436b57de32333cc337b8c7cea208c8863eee793Chris Lattner UnorderedChains.push_back(Root); 23767436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 2377ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, UnorderedChains)); 2378ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner } 2379ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner 23801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower the terminator after the copies are emitted. 23811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*LLVMBB->getTerminator()); 2382a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 2383a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner // Make sure the root of the DAG is up-to-date. 2384a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(SDL.getRoot()); 23851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 23861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF, 23881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo) { 2389b2efb853f00d45b1c8d57f92acd0028fbdeffda6Jim Laskey SelectionDAG DAG(TLI, MF, getAnalysisToUpdate<MachineDebugInfo>()); 23901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurDAG = &DAG; 23911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate; 23921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 23931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // First step, lower LLVM code to some DAG. This DAG may use operations and 23941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // types that are not supported by the target. 23951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BuildSelectionDAG(DAG, LLVMBB, PHINodesToUpdate, FuncInfo); 23961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2397af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in pre-legalize mode. 2398af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(false); 23992300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 24001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Lowered selection DAG:\n"); 24011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 24021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Second step, hack on the DAG until it only uses operations and types that 24041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the target supports. 2405ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner DAG.Legalize(); 24061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Legalized selection DAG:\n"); 24081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 24091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2410af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in post-legalize mode. 2411af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(true); 24122300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 2413a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng if (ViewISelDAGs) DAG.viewGraph(); 2414d48050aa1509130871b8bb2453270c92b969c2e7Chris Lattner 2415a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Third, instruction select all of the operations to machine code, adding the 2416a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // code to the MachineBasicBlock. 24171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InstructionSelectBasicBlock(DAG); 24181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 24191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Selected machine code:\n"); 24201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(BB->dump()); 24211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2422a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Next, now that we know what the last MBB the LLVM BB expanded is, update 24231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // PHI nodes in successors. 24241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 0, e = PHINodesToUpdate.size(); i != e; ++i) { 24251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineInstr *PHI = PHINodesToUpdate[i].first; 24261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(PHI->getOpcode() == TargetInstrInfo::PHI && 24271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner "This is not a machine PHI node that we are updating!"); 24281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addRegOperand(PHINodesToUpdate[i].second); 24291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addMachineBasicBlockOperand(BB); 24301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2431a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner 2432a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Finally, add the CFG edges from the last selected MBB to the successor 2433a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // MBBs. 2434a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 2435a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i) { 2436a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[TI->getSuccessor(i)]; 2437a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner BB->addSuccessor(Succ0MBB); 2438a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner } 24391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2440a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng 2441a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng//===----------------------------------------------------------------------===// 2442a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng/// ScheduleAndEmitDAG - Pick a safe ordering and emit instructions for each 2443a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng/// target node in the graph. 2444a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengvoid SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &DAG) { 2445a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng if (ViewSchedDAGs) DAG.viewGraph(); 24464ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng ScheduleDAG *SL = NULL; 24474ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 24484ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng switch (ISHeuristic) { 24494ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng default: assert(0 && "Unrecognized scheduling heuristic"); 24503f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng case defaultScheduling: 24513f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency) 24523f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng SL = createSimpleDAGScheduler(noScheduling, DAG, BB); 24533f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng else /* TargetLowering::SchedulingForRegPressure */ 24543f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng SL = createBURRListDAGScheduler(DAG, BB); 24553f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng break; 24564ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case noScheduling: 245720a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner SL = createBFS_DAGScheduler(DAG, BB); 245820a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner break; 24594ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case simpleScheduling: 246020a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner SL = createSimpleDAGScheduler(false, DAG, BB); 246120a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner break; 24624ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case simpleNoItinScheduling: 246320a4921791eafc0cce00fb01dcacfcfc15a0d0fcChris Lattner SL = createSimpleDAGScheduler(true, DAG, BB); 24644ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng break; 2465f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng case listSchedulingBURR: 2466f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng SL = createBURRListDAGScheduler(DAG, BB); 2467a5de484bc7c8f896b5903999797c4d57f4e45185Chris Lattner break; 246803fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner case listSchedulingTD: 2469b0d21ef20c29f4ea46d21b488f17feaa6a8760e1Chris Lattner SL = createTDListDAGScheduler(DAG, BB, CreateTargetHazardRecognizer()); 2470a5de484bc7c8f896b5903999797c4d57f4e45185Chris Lattner break; 24714ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng } 2472a3818e6f9a62db0c5b6aee28e44c30d5f96c9fa4Chris Lattner BB = SL->Run(); 2473cccf1232a69e2d78516c61a97e7bfa26acefb714Evan Cheng delete SL; 2474a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng} 24750e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 2476b0d21ef20c29f4ea46d21b488f17feaa6a8760e1Chris LattnerHazardRecognizer *SelectionDAGISel::CreateTargetHazardRecognizer() { 2477b0d21ef20c29f4ea46d21b488f17feaa6a8760e1Chris Lattner return new HazardRecognizer(); 247803fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner} 247903fc53c174e654adae4e42a0c352c7937de2cd87Chris Lattner 24800e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner/// SelectInlineAsmMemoryOperands - Calls to this are automatically generated 24810e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner/// by tblgen. Others should not call it. 24820e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattnervoid SelectionDAGISel:: 24830e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris LattnerSelectInlineAsmMemoryOperands(std::vector<SDOperand> &Ops, SelectionDAG &DAG) { 24840e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::vector<SDOperand> InOps; 24850e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::swap(InOps, Ops); 24860e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 24870e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps[0]); // input chain. 24880e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps[1]); // input asm string. 24890e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 24900e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner const char *AsmStr = cast<ExternalSymbolSDNode>(InOps[1])->getSymbol(); 24910e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner unsigned i = 2, e = InOps.size(); 24920e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (InOps[e-1].getValueType() == MVT::Flag) 24930e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner --e; // Don't process a flag operand if it is here. 24940e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 24950e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner while (i != e) { 24960e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner unsigned Flags = cast<ConstantSDNode>(InOps[i])->getValue(); 24970e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if ((Flags & 7) != 4 /*MEM*/) { 24980e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Just skip over this operand, copying the operands verbatim. 24990e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.insert(Ops.end(), InOps.begin()+i, InOps.begin()+i+(Flags >> 3) + 1); 25000e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner i += (Flags >> 3) + 1; 25010e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } else { 25020e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner assert((Flags >> 3) == 1 && "Memory operand with multiple values?"); 25030e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Otherwise, this is a memory operand. Ask the target to select it. 25040e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::vector<SDOperand> SelOps; 25050e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (SelectInlineAsmMemoryOperand(InOps[i+1], 'm', SelOps, DAG)) { 25060e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::cerr << "Could not match memory address. Inline asm failure!\n"; 25070e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner exit(1); 25080e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 25090e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 25100e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Add this to the output node. 25110e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(DAG.getConstant(4/*MEM*/ | (SelOps.size() << 3), MVT::i32)); 25120e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.insert(Ops.end(), SelOps.begin(), SelOps.end()); 25130e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner i += 2; 25140e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 25150e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 25160e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 25170e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Add the flag input back if present. 25180e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (e != InOps.size()) 25190e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps.back()); 25200e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner} 2521