llc.cpp revision b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16
15b836c4a06c584544647d5b013b193510ac5ced5Chris Lattner//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===// 23da94aec4d429b2ba0f65fa040c33650cade196bMisha Brukman// 37c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// The LLVM Compiler Infrastructure 47c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// 521c62da287237d39d0d95004881ea4baae3be6daChris Lattner// This file is distributed under the University of Illinois Open Source 621c62da287237d39d0d95004881ea4baae3be6daChris Lattner// License. See LICENSE.TXT for details. 73da94aec4d429b2ba0f65fa040c33650cade196bMisha Brukman// 87c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell//===----------------------------------------------------------------------===// 9e737c7ac63f1e4359c508601d5be60f7551b076dChris Lattner// 10e40eae73705d2ea55dc50d664d1be3ea04c545c8Brian Gaeke// This is the llc code generator driver. It provides a convenient 113da94aec4d429b2ba0f65fa040c33650cade196bMisha Brukman// command-line interface for generating native assembly-language code 12a99be51bf5cdac1438069d4b01766c47704961c8Gabor Greif// or C code, given LLVM bitcode. 13e737c7ac63f1e4359c508601d5be60f7551b076dChris Lattner// 14b79757c621c83dc3f410aacdc6db7639f9e47c6eChris Lattner//===----------------------------------------------------------------------===// 15cb465fc71ecb64d3d168a0cf754fa442abb0f6f9Vikram S. Adve 168b477ed579794ba6d76915d56b3f448a7dd20120Owen Anderson#include "llvm/LLVMContext.h" 1746ac43c1bbdf010507f61750368297889ac1b6c6Chris Lattner#include "llvm/Module.h" 18cd50d3fafabec10c09f3ed0466924a951943d6d0Chris Lattner#include "llvm/PassManager.h" 197d0ba026401321be1645b4142abeb85e943d0577Vikram S. Adve#include "llvm/Pass.h" 203c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar#include "llvm/ADT/Triple.h" 21778b06bbcecbe52125dddcb06e898806b1e2b3c7Dan Gohman#include "llvm/Support/IRReader.h" 223c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar#include "llvm/CodeGen/LinkAllAsmWriterComponents.h" 233c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar#include "llvm/CodeGen/LinkAllCodegenComponents.h" 243c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar#include "llvm/Config/config.h" 25ab8be96fd30ca9396e6b84fdddf1ac6208984cadEvan Cheng#include "llvm/MC/SubtargetFeature.h" 26551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/Support/CommandLine.h" 27c58d01b235fb6aba9edb49f6dbe08edaa756a873David Greene#include "llvm/Support/Debug.h" 2871847813bc419f7a0667468136a07429c6d9f164David Greene#include "llvm/Support/FormattedStream.h" 29c30598bc3ad792eb8cc75b188eb872a28c62ab71Chris Lattner#include "llvm/Support/ManagedStatic.h" 30551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/Support/PluginLoader.h" 31cc14d25dd99e891c586bd56aa41796abbe4ac3d8Chris Lattner#include "llvm/Support/PrettyStackTrace.h" 32e4f1a9b8a272ff7452759019ee7774e9dbdf1568Dan Gohman#include "llvm/Support/ToolOutputFile.h" 331f6efa3996dd1929fbc129203ce5009b620e6969Michael J. Spencer#include "llvm/Support/Host.h" 341f6efa3996dd1929fbc129203ce5009b620e6969Michael J. Spencer#include "llvm/Support/Signals.h" 353e74d6fdd248e20a280f1dff3da9a6c689c2c4c3Evan Cheng#include "llvm/Support/TargetRegistry.h" 363e74d6fdd248e20a280f1dff3da9a6c689c2c4c3Evan Cheng#include "llvm/Support/TargetSelect.h" 373c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar#include "llvm/Target/TargetData.h" 383c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar#include "llvm/Target/TargetMachine.h" 3986f42bdad93677fa0ca33b27afb0f493028376cbReid Spencer#include <memory> 40d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekeusing namespace llvm; 41d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 427d0ba026401321be1645b4142abeb85e943d0577Vikram S. Adve// General options for llc. Other pass-specific options are specified 437d0ba026401321be1645b4142abeb85e943d0577Vikram S. Adve// within the corresponding llc passes, and target-specific options 447d0ba026401321be1645b4142abeb85e943d0577Vikram S. Adve// and back-end code generation options are specified with the target machine. 453da94aec4d429b2ba0f65fa040c33650cade196bMisha Brukman// 46b5881f126d4baab41dc7efb2824a53601ef167b0Chris Lattnerstatic cl::opt<std::string> 47a99be51bf5cdac1438069d4b01766c47704961c8Gabor GreifInputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); 485ff62e90d0bc321206023897edc1e2691cb0fbb6Chris Lattner 49b5881f126d4baab41dc7efb2824a53601ef167b0Chris Lattnerstatic cl::opt<std::string> 505ff62e90d0bc321206023897edc1e2691cb0fbb6Chris LattnerOutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename")); 515ff62e90d0bc321206023897edc1e2691cb0fbb6Chris Lattner 52712e80e188c306125e32e46e9ed5db9dfc2f7cc9Evan Cheng// Determine optimization level. 5398a366d547772010e94609e4584489b3e5ce0043Bill Wendlingstatic cl::opt<char> 54be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill WendlingOptLevel("O", 55712e80e188c306125e32e46e9ed5db9dfc2f7cc9Evan Cheng cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] " 56712e80e188c306125e32e46e9ed5db9dfc2f7cc9Evan Cheng "(default = '-O2')"), 57be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling cl::Prefix, 58be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling cl::ZeroOrMore, 5998a366d547772010e94609e4584489b3e5ce0043Bill Wendling cl::init(' ')); 60178e0c41ce22160e6a1005420a52c29162dd87d3Chris Lattner 61f33b8663bdd9056660c9e520f20d9a562cbcff0bChris Lattnerstatic cl::opt<std::string> 62be193839fa8650bc4f2974a82327543054202190Chris LattnerTargetTriple("mtriple", cl::desc("Override target triple for module")); 63178e0c41ce22160e6a1005420a52c29162dd87d3Chris Lattner 641d929216916dc992f8643dda971aac58d47c7765Daniel Dunbarstatic cl::opt<std::string> 651d929216916dc992f8643dda971aac58d47c7765Daniel DunbarMArch("march", cl::desc("Architecture to generate code for (see --version)")); 663da94aec4d429b2ba0f65fa040c33650cade196bMisha Brukman 67b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskeystatic cl::opt<std::string> 685c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail GlushenkovMCPU("mcpu", 697b7593c4815d95f53148d41b171580e8c88741b6Chris Lattner cl::desc("Target a specific cpu type (-mcpu=help for details)"), 70b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey cl::value_desc("cpu-name"), 71b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey cl::init("")); 72b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey 73b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskeystatic cl::list<std::string> 745c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail GlushenkovMAttrs("mattr", 75b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey cl::CommaSeparated, 767b7593c4815d95f53148d41b171580e8c88741b6Chris Lattner cl::desc("Target specific attributes (-mattr=help for details)"), 772094725532836da20db56412ad7f88bc8eb6e586Chris Lattner cl::value_desc("a1,+a2,-a3,...")); 78b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey 79439661395fd2a2a832dba01c65bc88718528313cEvan Chengstatic cl::opt<Reloc::Model> 80439661395fd2a2a832dba01c65bc88718528313cEvan ChengRelocModel("relocation-model", 81439661395fd2a2a832dba01c65bc88718528313cEvan Cheng cl::desc("Choose relocation model"), 82439661395fd2a2a832dba01c65bc88718528313cEvan Cheng cl::init(Reloc::Default), 83439661395fd2a2a832dba01c65bc88718528313cEvan Cheng cl::values( 84439661395fd2a2a832dba01c65bc88718528313cEvan Cheng clEnumValN(Reloc::Default, "default", 85439661395fd2a2a832dba01c65bc88718528313cEvan Cheng "Target default relocation model"), 86439661395fd2a2a832dba01c65bc88718528313cEvan Cheng clEnumValN(Reloc::Static, "static", 87439661395fd2a2a832dba01c65bc88718528313cEvan Cheng "Non-relocatable code"), 88439661395fd2a2a832dba01c65bc88718528313cEvan Cheng clEnumValN(Reloc::PIC_, "pic", 89439661395fd2a2a832dba01c65bc88718528313cEvan Cheng "Fully relocatable, position independent code"), 90439661395fd2a2a832dba01c65bc88718528313cEvan Cheng clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 91439661395fd2a2a832dba01c65bc88718528313cEvan Cheng "Relocatable external references, non-relocatable code"), 92439661395fd2a2a832dba01c65bc88718528313cEvan Cheng clEnumValEnd)); 93439661395fd2a2a832dba01c65bc88718528313cEvan Cheng 9434ad6db8b958fdc0d38e122edf753b5326e69b03Evan Chengstatic cl::opt<llvm::CodeModel::Model> 9534ad6db8b958fdc0d38e122edf753b5326e69b03Evan ChengCMModel("code-model", 9634ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng cl::desc("Choose code model"), 9734ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng cl::init(CodeModel::Default), 9834ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng cl::values(clEnumValN(CodeModel::Default, "default", 9934ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng "Target default code model"), 10034ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng clEnumValN(CodeModel::Small, "small", 10134ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng "Small code model"), 10234ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng clEnumValN(CodeModel::Kernel, "kernel", 10334ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng "Kernel code model"), 10434ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng clEnumValN(CodeModel::Medium, "medium", 10534ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng "Medium code model"), 10634ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng clEnumValN(CodeModel::Large, "large", 10734ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng "Large code model"), 10834ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng clEnumValEnd)); 10934ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng 1107c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencerstatic cl::opt<bool> 111e68cd267abab22cc81b97672bad0ec5e0751488bMichael J. SpencerRelaxAll("mc-relax-all", 112e68cd267abab22cc81b97672bad0ec5e0751488bMichael J. Spencer cl::desc("When used with filetype=obj, " 113c9234c583573cfc0b19a94ecd766e2521e75e91cMichael J. Spencer "relax all fixups in the emitted object file")); 1147c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer 115812125aea956d0c22d92b456dbc5030a1d2780efChris Lattnercl::opt<TargetMachine::CodeGenFileType> 116211edae4843f5c2ee9c376e88e4cf0ecc8745f03Chris LattnerFileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile), 117812125aea956d0c22d92b456dbc5030a1d2780efChris Lattner cl::desc("Choose a file type (not all types are supported by all targets):"), 118812125aea956d0c22d92b456dbc5030a1d2780efChris Lattner cl::values( 119211edae4843f5c2ee9c376e88e4cf0ecc8745f03Chris Lattner clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm", 120b8cab9227a0f6ffbdaae33e3c64268e265008a6aDan Gohman "Emit an assembly ('.s') file"), 121211edae4843f5c2ee9c376e88e4cf0ecc8745f03Chris Lattner clEnumValN(TargetMachine::CGFT_ObjectFile, "obj", 122b8cab9227a0f6ffbdaae33e3c64268e265008a6aDan Gohman "Emit a native object ('.o') file [experimental]"), 1235669e3009761dff20b67e18a382c334041887928Chris Lattner clEnumValN(TargetMachine::CGFT_Null, "null", 1245669e3009761dff20b67e18a382c334041887928Chris Lattner "Emit nothing, for performance testing"), 125812125aea956d0c22d92b456dbc5030a1d2780efChris Lattner clEnumValEnd)); 126812125aea956d0c22d92b456dbc5030a1d2780efChris Lattner 1274418c2b3acfcb6cdb05f133aef8eef74ed0d0566Reid Spencercl::opt<bool> NoVerify("disable-verify", cl::Hidden, 128d29b6aa608d69f19b57ebd2ae630b040b1c4951dJeff Cohen cl::desc("Do not verify input module")); 1294418c2b3acfcb6cdb05f133aef8eef74ed0d0566Reid Spencer 13075a08e6aac8e9e7bb24d34234b8bfaa512638b06Devang Patelcl::opt<bool> DisableDotLoc("disable-dot-loc", cl::Hidden, 13175a08e6aac8e9e7bb24d34234b8bfaa512638b06Devang Patel cl::desc("Do not use .loc entries")); 132812125aea956d0c22d92b456dbc5030a1d2780efChris Lattner 133f1a5c7ec04002769f1638e64f7439589f0f926e6Rafael Espindolacl::opt<bool> DisableCFI("disable-cfi", cl::Hidden, 134f1a5c7ec04002769f1638e64f7439589f0f926e6Rafael Espindola cl::desc("Do not use .cfi_* directives")); 135f1a5c7ec04002769f1638e64f7439589f0f926e6Rafael Espindola 1364e478fed1b8021150b1f2cec4e670068b6abd135Nick Lewyckycl::opt<bool> EnableDwarfDirectory("enable-dwarf-directory", cl::Hidden, 1374e478fed1b8021150b1f2cec4e670068b6abd135Nick Lewycky cl::desc("Use .file directives with an explicit directory.")); 13844d798d9763bc32aaf49fe7c10d604845f4b6685Nick Lewycky 139d18e31ae17390d9c6f6cf93d18badf962452031dDevang Patelstatic cl::opt<bool> 140d18e31ae17390d9c6f6cf93d18badf962452031dDevang PatelDisableRedZone("disable-red-zone", 141d18e31ae17390d9c6f6cf93d18badf962452031dDevang Patel cl::desc("Do not emit code that uses the red zone."), 142d18e31ae17390d9c6f6cf93d18badf962452031dDevang Patel cl::init(false)); 143d18e31ae17390d9c6f6cf93d18badf962452031dDevang Patel 144812125aea956d0c22d92b456dbc5030a1d2780efChris Lattner// GetFileNameRoot - Helper function to get the basename of a filename. 145b5881f126d4baab41dc7efb2824a53601ef167b0Chris Lattnerstatic inline std::string 146e45110e01282862e95c3d28c489dedd9a08ffa31Chris LattnerGetFileNameRoot(const std::string &InputFilename) { 147b5881f126d4baab41dc7efb2824a53601ef167b0Chris Lattner std::string IFN = InputFilename; 148b5881f126d4baab41dc7efb2824a53601ef167b0Chris Lattner std::string outputFilename; 1492f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve int Len = IFN.length(); 150b5d09bf4cc7769ccbd86a96fb8ea92e3c6e3bbc7John Criswell if ((Len > 2) && 151d81c450afcc0258586d677813c388b0c8f289887Dan Gohman IFN[Len-3] == '.' && 152d81c450afcc0258586d677813c388b0c8f289887Dan Gohman ((IFN[Len-2] == 'b' && IFN[Len-1] == 'c') || 153d81c450afcc0258586d677813c388b0c8f289887Dan Gohman (IFN[Len-2] == 'l' && IFN[Len-1] == 'l'))) { 154b5881f126d4baab41dc7efb2824a53601ef167b0Chris Lattner outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/ 1552f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve } else { 1563524fc2197c17edcea786a9bb0e00246438dba90Chris Lattner outputFilename = IFN; 1572f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve } 1582f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve return outputFilename; 1592f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve} 1602f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve 161d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohmanstatic tool_output_file *GetOutputStream(const char *TargetName, 162d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman Triple::OSType OS, 163d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman const char *ProgName) { 16418cde6df91a33d62a334002a7b608917c07791e8Dan Gohman // If we don't yet have an output filename, make one. 16518cde6df91a33d62a334002a7b608917c07791e8Dan Gohman if (OutputFilename.empty()) { 16618cde6df91a33d62a334002a7b608917c07791e8Dan Gohman if (InputFilename == "-") 16718cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename = "-"; 16818cde6df91a33d62a334002a7b608917c07791e8Dan Gohman else { 16918cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename = GetFileNameRoot(InputFilename); 17018cde6df91a33d62a334002a7b608917c07791e8Dan Gohman 17118cde6df91a33d62a334002a7b608917c07791e8Dan Gohman switch (FileType) { 17218cde6df91a33d62a334002a7b608917c07791e8Dan Gohman default: assert(0 && "Unknown file type"); 17318cde6df91a33d62a334002a7b608917c07791e8Dan Gohman case TargetMachine::CGFT_AssemblyFile: 17418cde6df91a33d62a334002a7b608917c07791e8Dan Gohman if (TargetName[0] == 'c') { 17518cde6df91a33d62a334002a7b608917c07791e8Dan Gohman if (TargetName[1] == 0) 17618cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".cbe.c"; 17718cde6df91a33d62a334002a7b608917c07791e8Dan Gohman else if (TargetName[1] == 'p' && TargetName[2] == 'p') 17818cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".cpp"; 17918cde6df91a33d62a334002a7b608917c07791e8Dan Gohman else 18018cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".s"; 18118cde6df91a33d62a334002a7b608917c07791e8Dan Gohman } else 18218cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".s"; 18318cde6df91a33d62a334002a7b608917c07791e8Dan Gohman break; 18418cde6df91a33d62a334002a7b608917c07791e8Dan Gohman case TargetMachine::CGFT_ObjectFile: 18518cde6df91a33d62a334002a7b608917c07791e8Dan Gohman if (OS == Triple::Win32) 18618cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".obj"; 18718cde6df91a33d62a334002a7b608917c07791e8Dan Gohman else 18818cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".o"; 18918cde6df91a33d62a334002a7b608917c07791e8Dan Gohman break; 19018cde6df91a33d62a334002a7b608917c07791e8Dan Gohman case TargetMachine::CGFT_Null: 19118cde6df91a33d62a334002a7b608917c07791e8Dan Gohman OutputFilename += ".null"; 19218cde6df91a33d62a334002a7b608917c07791e8Dan Gohman break; 19318cde6df91a33d62a334002a7b608917c07791e8Dan Gohman } 194ed3e8b4ed2a3ab44d316e16a54d963f8927c6783Dan Gohman } 1951911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner } 1961911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner 19718cde6df91a33d62a334002a7b608917c07791e8Dan Gohman // Decide if we need "binary" output. 1980d9eb9b4917340acbfc831890655b8e9724959f6Daniel Dunbar bool Binary = false; 1991911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner switch (FileType) { 200211edae4843f5c2ee9c376e88e4cf0ecc8745f03Chris Lattner default: assert(0 && "Unknown file type"); 201211edae4843f5c2ee9c376e88e4cf0ecc8745f03Chris Lattner case TargetMachine::CGFT_AssemblyFile: 2021911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner break; 203211edae4843f5c2ee9c376e88e4cf0ecc8745f03Chris Lattner case TargetMachine::CGFT_ObjectFile: 2045669e3009761dff20b67e18a382c334041887928Chris Lattner case TargetMachine::CGFT_Null: 2050d9eb9b4917340acbfc831890655b8e9724959f6Daniel Dunbar Binary = true; 2061911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner break; 2071911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner } 2085c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 20918cde6df91a33d62a334002a7b608917c07791e8Dan Gohman // Open the file. 210cb3718832375a581c5ea23f15918f3ea447a446cOwen Anderson std::string error; 21117e9edc4a7bbeadf756494cf39fcacc9eff72202Chris Lattner unsigned OpenFlags = 0; 21217e9edc4a7bbeadf756494cf39fcacc9eff72202Chris Lattner if (Binary) OpenFlags |= raw_fd_ostream::F_Binary; 213d5826a33a5a7c298a8934541d11cda042028be3bDan Gohman tool_output_file *FDOut = new tool_output_file(OutputFilename.c_str(), error, 214d5826a33a5a7c298a8934541d11cda042028be3bDan Gohman OpenFlags); 215cb3718832375a581c5ea23f15918f3ea447a446cOwen Anderson if (!error.empty()) { 21665f57c233cd4499e2e8b52a503201e64edfd6a9eDan Gohman errs() << error << '\n'; 217a1bdcedc3879510a874d24c450e07feb170d9cd6Dan Gohman delete FDOut; 2181911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner return 0; 2191911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner } 2205c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 221d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman return FDOut; 2221911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner} 223da784ee81f082781fb61258546fec7c82ba6a8f0Chris Lattner 2245b836c4a06c584544647d5b013b193510ac5ced5Chris Lattner// main - Entry point for the llc compiler. 2255b836c4a06c584544647d5b013b193510ac5ced5Chris Lattner// 2265b836c4a06c584544647d5b013b193510ac5ced5Chris Lattnerint main(int argc, char **argv) { 2271a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner sys::PrintStackTraceOnErrorSignal(); 228cc14d25dd99e891c586bd56aa41796abbe4ac3d8Chris Lattner PrettyStackTraceProgram X(argc, argv); 229c58d01b235fb6aba9edb49f6dbe08edaa756a873David Greene 230c58d01b235fb6aba9edb49f6dbe08edaa756a873David Greene // Enable debug stream buffering. 231c58d01b235fb6aba9edb49f6dbe08edaa756a873David Greene EnableDebugBuffering = true; 232c58d01b235fb6aba9edb49f6dbe08edaa756a873David Greene 2330d7c695c74ae6d5f68cc07378c17491915e607d3Owen Anderson LLVMContext &Context = getGlobalContext(); 234cc14d25dd99e891c586bd56aa41796abbe4ac3d8Chris Lattner llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 235e45110e01282862e95c3d28c489dedd9a08ffa31Chris Lattner 2362b991bbd9918d7ae67d3f6d9ae69cf15d929698bDaniel Dunbar // Initialize targets first, so that --version shows registered targets. 2372deb58f72ec6547a2f760fc48f86b4d95d0a4a02Chris Lattner InitializeAllTargets(); 238e78085a3c03de648a481e9751c3094c517bd7123Evan Cheng InitializeAllTargetMCs(); 2392deb58f72ec6547a2f760fc48f86b4d95d0a4a02Chris Lattner InitializeAllAsmPrinters(); 240af632c91a0090d8448dd10e48d8ce53f31be0a21Chris Lattner InitializeAllAsmParsers(); 241494d663175bbaa7db4743105d1efdf78be9cdb03Daniel Dunbar 2424039313b4c9796d194d90f88675ceb47a183696eChandler Carruth // Register the target printer for --version. 2434039313b4c9796d194d90f88675ceb47a183696eChandler Carruth cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 2444039313b4c9796d194d90f88675ceb47a183696eChandler Carruth 245494d663175bbaa7db4743105d1efdf78be9cdb03Daniel Dunbar cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); 246a41af7aeef953870da1cfeb59f7f3a34789dc8a5Andrew Trick 2471a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner // Load the module to be compiled... 248778b06bbcecbe52125dddcb06e898806b1e2b3c7Dan Gohman SMDiagnostic Err; 2491a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner std::auto_ptr<Module> M; 2505c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 251778b06bbcecbe52125dddcb06e898806b1e2b3c7Dan Gohman M.reset(ParseIRFile(InputFilename, Err, Context)); 2521a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner if (M.get() == 0) { 253d8b7aa26134d2abee777f745c32005e63dea2455Chris Lattner Err.print(argv[0], errs()); 2541a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner return 1; 2551a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner } 2561a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner Module &mod = *M.get(); 2575c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 2581a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner // If we are supposed to override the target triple, do so now. 2591a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner if (!TargetTriple.empty()) 26075ebbceeeda1e7a78efe1848bb90e034f0c6ba61Duncan Sands mod.setTargetTriple(Triple::normalize(TargetTriple)); 2615c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 2623c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar Triple TheTriple(mod.getTargetTriple()); 2633c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar if (TheTriple.getTriple().empty()) 2640173864d8a87d9243d304fbf91b556e20b5a32fcSebastian Pop TheTriple.setTriple(sys::getDefaultTargetTriple()); 2653c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar 2663c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar // Allocate target machine. First, check whether the user has explicitly 2673c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar // specified an architecture to compile for. If so we have to look it up by 2683c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar // name, because it might be a backend that has no mapping to a target triple. 2691d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar const Target *TheTarget = 0; 2701d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar if (!MArch.empty()) { 2711d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar for (TargetRegistry::iterator it = TargetRegistry::begin(), 2721d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar ie = TargetRegistry::end(); it != ie; ++it) { 2731d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar if (MArch == it->getName()) { 2741d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar TheTarget = &*it; 2751d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar break; 2761d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar } 2771d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar } 2781d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar 2791d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar if (!TheTarget) { 2801d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n"; 2811d929216916dc992f8643dda971aac58d47c7765Daniel Dunbar return 1; 2823c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar } 2833c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar 2843c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar // Adjust the triple to match (if known), otherwise stick with the 2853c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar // module/host triple. 2863c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch); 2873c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar if (Type != Triple::UnknownArch) 2883c2d4bf97fa96fe171883cd80e4ea93fc43563e6Daniel Dunbar TheTriple.setArch(Type); 28951b198af83cb0080c2709b04c129a3d774c07765Daniel Dunbar } else { 2901a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner std::string Err; 2914bd03abe593222b26e84066223feb321bf738625Daniel Dunbar TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err); 29251b198af83cb0080c2709b04c129a3d774c07765Daniel Dunbar if (TheTarget == 0) { 29365f57c233cd4499e2e8b52a503201e64edfd6a9eDan Gohman errs() << argv[0] << ": error auto-selecting target for module '" 29465f57c233cd4499e2e8b52a503201e64edfd6a9eDan Gohman << Err << "'. Please use the -march option to explicitly " 29565f57c233cd4499e2e8b52a503201e64edfd6a9eDan Gohman << "pick a target.\n"; 2961a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner return 1; 297b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey } 2981a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner } 299b1e1180ca0b32f37aa74d7ad703eeaf91e66c8faJim Laskey 3001a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner // Package up features to be passed to target/subtarget 3011a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner std::string FeaturesStr; 302276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng if (MAttrs.size()) { 3031a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner SubtargetFeatures Features; 3041a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner for (unsigned i = 0; i != MAttrs.size(); ++i) 3051a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner Features.AddFeature(MAttrs[i]); 3061a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner FeaturesStr = Features.getString(); 3071a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner } 3085c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 309b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng CodeGenOpt::Level OLvl = CodeGenOpt::Default; 310b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng switch (OptLevel) { 311b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng default: 312b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng errs() << argv[0] << ": invalid optimization level.\n"; 313b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng return 1; 314b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng case ' ': break; 315b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng case '0': OLvl = CodeGenOpt::None; break; 316b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng case '1': OLvl = CodeGenOpt::Less; break; 317b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng case '2': OLvl = CodeGenOpt::Default; break; 318b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng case '3': OLvl = CodeGenOpt::Aggressive; break; 319b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng } 320b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng 321a41af7aeef953870da1cfeb59f7f3a34789dc8a5Andrew Trick std::auto_ptr<TargetMachine> 32234ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng target(TheTarget->createTargetMachine(TheTriple.getTriple(), 32334ad6db8b958fdc0d38e122edf753b5326e69b03Evan Cheng MCPU, FeaturesStr, 324b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng RelocModel, CMModel, OLvl)); 3251a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner assert(target.get() && "Could not allocate target machine!"); 3261a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner TargetMachine &Target = *target.get(); 3271ef8bdaedbd98bee35a573b8bc87149f2182cb5eReid Spencer 32875a08e6aac8e9e7bb24d34234b8bfaa512638b06Devang Patel if (DisableDotLoc) 32975a08e6aac8e9e7bb24d34234b8bfaa512638b06Devang Patel Target.setMCUseLoc(false); 330d285139e0e1fc4a2253ebb18415e2abdf573e373Daniel Dunbar 331f1a5c7ec04002769f1638e64f7439589f0f926e6Rafael Espindola if (DisableCFI) 332f1a5c7ec04002769f1638e64f7439589f0f926e6Rafael Espindola Target.setMCUseCFI(false); 333f1a5c7ec04002769f1638e64f7439589f0f926e6Rafael Espindola 3344e478fed1b8021150b1f2cec4e670068b6abd135Nick Lewycky if (EnableDwarfDirectory) 3354e478fed1b8021150b1f2cec4e670068b6abd135Nick Lewycky Target.setMCUseDwarfDirectory(true); 33644d798d9763bc32aaf49fe7c10d604845f4b6685Nick Lewycky 337d285139e0e1fc4a2253ebb18415e2abdf573e373Daniel Dunbar // Disable .loc support for older OS X versions. 338558692fd0a31d4d3ae4fd09a3a02f80da2e44e5cDaniel Dunbar if (TheTriple.isMacOSX() && 3390ccc0dde33ee78003367cb41a05156c16429dc71Daniel Dunbar TheTriple.isMacOSXVersionLT(10, 6)) 340d285139e0e1fc4a2253ebb18415e2abdf573e373Daniel Dunbar Target.setMCUseLoc(false); 34175a08e6aac8e9e7bb24d34234b8bfaa512638b06Devang Patel 3421a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner // Figure out where we are going to send the output... 343d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman OwningPtr<tool_output_file> Out 344d5826a33a5a7c298a8934541d11cda042028be3bDan Gohman (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0])); 345d5826a33a5a7c298a8934541d11cda042028be3bDan Gohman if (!Out) return 1; 3465c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 34799dca4fde746eb76253e737cca166261c767412dDan Gohman // Build up all of the passes that we want to do to the module. 34899dca4fde746eb76253e737cca166261c767412dDan Gohman PassManager PM; 34999dca4fde746eb76253e737cca166261c767412dDan Gohman 35099dca4fde746eb76253e737cca166261c767412dDan Gohman // Add the target data from the target machine, if it exists, or the module. 35199dca4fde746eb76253e737cca166261c767412dDan Gohman if (const TargetData *TD = Target.getTargetData()) 35299dca4fde746eb76253e737cca166261c767412dDan Gohman PM.add(new TargetData(*TD)); 35399dca4fde746eb76253e737cca166261c767412dDan Gohman else 35499dca4fde746eb76253e737cca166261c767412dDan Gohman PM.add(new TargetData(&mod)); 35599dca4fde746eb76253e737cca166261c767412dDan Gohman 35699dca4fde746eb76253e737cca166261c767412dDan Gohman // Override default to generate verbose assembly. 35799dca4fde746eb76253e737cca166261c767412dDan Gohman Target.setAsmVerbosityDefault(true); 35899dca4fde746eb76253e737cca166261c767412dDan Gohman 3597c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer if (RelaxAll) { 3607c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer if (FileType != TargetMachine::CGFT_ObjectFile) 3617c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer errs() << argv[0] 3627c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer << ": warning: ignoring -mc-relax-all because filetype != obj"; 3637c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer else 3647c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer Target.setMCRelaxAll(true); 3657c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer } 3667c380eded54a19870bd5f4f076733d174f9aa582Michael J. Spencer 367d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman { 368d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman formatted_raw_ostream FOS(Out->os()); 3695c1799b29375fcd899f67a31fb4dda4ef3e2127fMikhail Glushenkov 370d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman // Ask the target to add backend passes as necessary. 371b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16Evan Cheng if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify)) { 372d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman errs() << argv[0] << ": target does not support generation of this" 373d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman << " file type!\n"; 374d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman return 1; 375d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman } 376d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman 377ce96902d88d473697f05c0465952dae374be564eAndrew Trick // Before executing passes, print the final values of the LLVM options. 378ce96902d88d473697f05c0465952dae374be564eAndrew Trick cl::PrintOptionValues(); 379ce96902d88d473697f05c0465952dae374be564eAndrew Trick 380d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman PM.run(mod); 381d4c454317a38d65957edebe62bfc69fc8d9885e8Dan Gohman } 38299dca4fde746eb76253e737cca166261c767412dDan Gohman 383d5826a33a5a7c298a8934541d11cda042028be3bDan Gohman // Declare success. 384d5826a33a5a7c298a8934541d11cda042028be3bDan Gohman Out->keep(); 38505e5e070ee73309025e11bea0c15d7fc9c25fea6Chris Lattner 3861a7354082ad62d9e31faf3d6ad15c39debc94fd6Chris Lattner return 0; 3872f64f9f264d30dd0ac4880eb16ba9eeac538e94cVikram S. Adve} 388