Miscompilation.cpp revision f4789e6d04c1fddb40092a1193c4a5eb67387acc
14a10645c70199c8d8567fbc46312158c419720abChris Lattner//===- Miscompilation.cpp - Debug program miscompilations -----------------===// 27c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// 37c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// The LLVM Compiler Infrastructure 47c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// 57c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// This file was developed by the LLVM research group and is distributed under 67c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// the University of Illinois Open Source License. See LICENSE.TXT for details. 77c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell// 87c0e022c5c4be4b11e199a53f73bbdd84e34aa80John Criswell//===----------------------------------------------------------------------===// 94a10645c70199c8d8567fbc46312158c419720abChris Lattner// 10a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner// This file implements optimizer and code generation miscompilation debugging 11a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner// support. 124a10645c70199c8d8567fbc46312158c419720abChris Lattner// 134a10645c70199c8d8567fbc46312158c419720abChris Lattner//===----------------------------------------------------------------------===// 144a10645c70199c8d8567fbc46312158c419720abChris Lattner 154a10645c70199c8d8567fbc46312158c419720abChris Lattner#include "BugDriver.h" 16126840f49e8d49156a342e836d4b2adca46dc3baChris Lattner#include "ListReducer.h" 17a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#include "llvm/Constants.h" 18a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#include "llvm/DerivedTypes.h" 19a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#include "llvm/Instructions.h" 204a10645c70199c8d8567fbc46312158c419720abChris Lattner#include "llvm/Module.h" 21e49603d79d220a795bd50684c8b1f503ee40f97fMisha Brukman#include "llvm/Pass.h" 22a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#include "llvm/Analysis/Verifier.h" 23a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#include "llvm/Support/Mangler.h" 24640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner#include "llvm/Transforms/Utils/Cloning.h" 25640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner#include "llvm/Transforms/Utils/Linker.h" 26a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#include "Support/CommandLine.h" 273d9cafa003a114bf9974bc80d5b69b0ed1d29290Misha Brukman#include "Support/FileUtilities.h" 28fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattnerusing namespace llvm; 294a10645c70199c8d8567fbc46312158c419720abChris Lattner 30a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattnernamespace llvm { 31a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner extern cl::list<std::string> InputArgv; 32a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner} 33a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 34efdc0b505712d1ca4460def27e51c430f033d58dChris Lattnernamespace { 35fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner class ReduceMiscompilingPasses : public ListReducer<const PassInfo*> { 36fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner BugDriver &BD; 37fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner public: 38fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner ReduceMiscompilingPasses(BugDriver &bd) : BD(bd) {} 39fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner 40fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner virtual TestResult doTest(std::vector<const PassInfo*> &Prefix, 41fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner std::vector<const PassInfo*> &Suffix); 42fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner }; 43fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner} 44640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 458c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// TestResult - After passes have been split into a test group and a control 468c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// group, see if they still break the program. 478c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 48640f22e66d90439857a97a83896ee68c4f7128c9Chris LattnerReduceMiscompilingPasses::TestResult 4939aebca3a2d1dd389a6d9cdfb51a53f625e244f0Chris LattnerReduceMiscompilingPasses::doTest(std::vector<const PassInfo*> &Prefix, 5006943add8b2b764e131979cca064eda9f28826c9Chris Lattner std::vector<const PassInfo*> &Suffix) { 5106943add8b2b764e131979cca064eda9f28826c9Chris Lattner // First, run the program with just the Suffix passes. If it is still broken 52640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // with JUST the kept passes, discard the prefix passes. 5306943add8b2b764e131979cca064eda9f28826c9Chris Lattner std::cout << "Checking to see if '" << getPassesString(Suffix) 54640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << "' compile correctly: "; 55640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 56640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner std::string BytecodeResult; 5706943add8b2b764e131979cca064eda9f28826c9Chris Lattner if (BD.runPasses(Suffix, BytecodeResult, false/*delete*/, true/*quiet*/)) { 589f71e799c3e6e4cc0c71de82bda81f8753e82942Chris Lattner std::cerr << " Error running this sequence of passes" 59640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << " on the input program!\n"; 605ef681c19de9c675a265211f8fb0ae49cc3a3a66Chris Lattner BD.setPassesToRun(Suffix); 615ef681c19de9c675a265211f8fb0ae49cc3a3a66Chris Lattner BD.EmitProgressBytecode("pass-error", false); 62025262692a6710de29a48e2b3905672cd12d13d2Chris Lattner exit(BD.debugOptimizerCrash()); 63640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 64640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 65640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Check to see if the finished program matches the reference output... 665073336cd4da5df4ae13a167582d1dc90f32e4e0Misha Brukman if (BD.diffProgram(BytecodeResult, "", true /*delete bytecode*/)) { 67123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman std::cout << " nope.\n"; 68123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman return KeepSuffix; // Miscompilation detected! 69640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 70123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman std::cout << " yup.\n"; // No miscompilation! 71640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 72640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner if (Prefix.empty()) return NoFailure; 73640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 7406943add8b2b764e131979cca064eda9f28826c9Chris Lattner // Next, see if the program is broken if we run the "prefix" passes first, 75bc0e998c497446f5448425b3cbd7f8f19a458764Misha Brukman // then separately run the "kept" passes. 76640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner std::cout << "Checking to see if '" << getPassesString(Prefix) 77640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << "' compile correctly: "; 78640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 79640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // If it is not broken with the kept passes, it's possible that the prefix 80640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // passes must be run before the kept passes to break it. If the program 81640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // WORKS after the prefix passes, but then fails if running the prefix AND 82640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // kept passes, we can update our bytecode file to include the result of the 83640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // prefix passes, then discard the prefix passes. 84640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // 85640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner if (BD.runPasses(Prefix, BytecodeResult, false/*delete*/, true/*quiet*/)) { 869f71e799c3e6e4cc0c71de82bda81f8753e82942Chris Lattner std::cerr << " Error running this sequence of passes" 87640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << " on the input program!\n"; 889c6cfe1bffd37f29a265457b7515839c445b3e6aChris Lattner BD.setPassesToRun(Prefix); 899c6cfe1bffd37f29a265457b7515839c445b3e6aChris Lattner BD.EmitProgressBytecode("pass-error", false); 90025262692a6710de29a48e2b3905672cd12d13d2Chris Lattner exit(BD.debugOptimizerCrash()); 91640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 92640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 93640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // If the prefix maintains the predicate by itself, only keep the prefix! 945073336cd4da5df4ae13a167582d1dc90f32e4e0Misha Brukman if (BD.diffProgram(BytecodeResult)) { 95123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman std::cout << " nope.\n"; 96640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner removeFile(BytecodeResult); 97640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner return KeepPrefix; 98640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 99123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman std::cout << " yup.\n"; // No miscompilation! 100640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 101640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Ok, so now we know that the prefix passes work, try running the suffix 102640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // passes on the result of the prefix passes. 103640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // 104efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *PrefixOutput = ParseInputFile(BytecodeResult); 105640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner if (PrefixOutput == 0) { 106640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner std::cerr << BD.getToolName() << ": Error reading bytecode file '" 107640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << BytecodeResult << "'!\n"; 108640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner exit(1); 109640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 110640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner removeFile(BytecodeResult); // No longer need the file on disk 111f4789e6d04c1fddb40092a1193c4a5eb67387accChris Lattner 112f4789e6d04c1fddb40092a1193c4a5eb67387accChris Lattner // Don't check if there are no passes in the suffix. 113f4789e6d04c1fddb40092a1193c4a5eb67387accChris Lattner if (Suffix.empty()) 114f4789e6d04c1fddb40092a1193c4a5eb67387accChris Lattner return NoFailure; 115f4789e6d04c1fddb40092a1193c4a5eb67387accChris Lattner 11606943add8b2b764e131979cca064eda9f28826c9Chris Lattner std::cout << "Checking to see if '" << getPassesString(Suffix) 117640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << "' passes compile correctly after the '" 118640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << getPassesString(Prefix) << "' passes: "; 119640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 120efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *OriginalInput = BD.swapProgramIn(PrefixOutput); 12106943add8b2b764e131979cca064eda9f28826c9Chris Lattner if (BD.runPasses(Suffix, BytecodeResult, false/*delete*/, true/*quiet*/)) { 1229f71e799c3e6e4cc0c71de82bda81f8753e82942Chris Lattner std::cerr << " Error running this sequence of passes" 123640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner << " on the input program!\n"; 1245ef681c19de9c675a265211f8fb0ae49cc3a3a66Chris Lattner BD.setPassesToRun(Suffix); 1259c6cfe1bffd37f29a265457b7515839c445b3e6aChris Lattner BD.EmitProgressBytecode("pass-error", false); 126025262692a6710de29a48e2b3905672cd12d13d2Chris Lattner exit(BD.debugOptimizerCrash()); 127640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 128640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 129640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Run the result... 1305073336cd4da5df4ae13a167582d1dc90f32e4e0Misha Brukman if (BD.diffProgram(BytecodeResult, "", true/*delete bytecode*/)) { 131123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman std::cout << " nope.\n"; 132640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner delete OriginalInput; // We pruned down the original input... 13306943add8b2b764e131979cca064eda9f28826c9Chris Lattner return KeepSuffix; 134640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner } 135640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 136640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Otherwise, we must not be running the bad pass anymore. 137123f8fec94d1f22d876382897231868c62f8eabbMisha Brukman std::cout << " yup.\n"; // No miscompilation! 138efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner delete BD.swapProgramIn(OriginalInput); // Restore orig program & free test 139640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner return NoFailure; 140640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner} 141640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 142efdc0b505712d1ca4460def27e51c430f033d58dChris Lattnernamespace { 143fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner class ReduceMiscompilingFunctions : public ListReducer<Function*> { 144fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner BugDriver &BD; 145b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner bool (*TestFn)(BugDriver &, Module *, Module *); 146fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner public: 147b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ReduceMiscompilingFunctions(BugDriver &bd, 148b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner bool (*F)(BugDriver &, Module *, Module *)) 149b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner : BD(bd), TestFn(F) {} 150fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner 151fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner virtual TestResult doTest(std::vector<Function*> &Prefix, 152fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner std::vector<Function*> &Suffix) { 153be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner if (!Suffix.empty() && TestFuncs(Suffix)) 154fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner return KeepSuffix; 155be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner if (!Prefix.empty() && TestFuncs(Prefix)) 156fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner return KeepPrefix; 157fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner return NoFailure; 158fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner } 159fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner 160be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner bool TestFuncs(const std::vector<Function*> &Prefix); 161fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner }; 162fa76183e8e28985dfd17b1d6291c939dab4cbe1dChris Lattner} 163640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 164efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner/// TestMergedProgram - Given two modules, link them together and run the 165efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner/// program, checking to see if the program matches the diff. If the diff 166a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner/// matches, return false, otherwise return true. If the DeleteInputs argument 167a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner/// is set to true then this function deletes both input modules before it 168a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner/// returns. 1698c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 170a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattnerstatic bool TestMergedProgram(BugDriver &BD, Module *M1, Module *M2, 171a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner bool DeleteInputs) { 172efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner // Link the two portions of the program back to together. 173efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner std::string ErrorMsg; 174a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner if (!DeleteInputs) M1 = CloneModule(M1); 175efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner if (LinkModules(M1, M2, &ErrorMsg)) { 176efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner std::cerr << BD.getToolName() << ": Error linking modules together:" 177efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner << ErrorMsg << "\n"; 178efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner exit(1); 179efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner } 180a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner if (DeleteInputs) delete M2; // We are done with this module... 181efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner 182efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *OldProgram = BD.swapProgramIn(M1); 183efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner 184efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner // Execute the program. If it does not match the expected output, we must 185efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner // return true. 186efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner bool Broken = BD.diffProgram(); 187efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner 188efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner // Delete the linked module & restore the original 189a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner BD.swapProgramIn(OldProgram); 1905313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner delete M1; 191efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner return Broken; 192efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner} 193efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner 1948c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// TestFuncs - split functions in a Module into two groups: those that are 1958c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// under consideration for miscompilation vs. those that are not, and test 1968c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// accordingly. Each group of functions becomes a separate Module. 1978c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 198be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattnerbool ReduceMiscompilingFunctions::TestFuncs(const std::vector<Function*>&Funcs){ 199640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Test to see if the function is misoptimized if we ONLY run it on the 200640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // functions listed in Funcs. 201be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner std::cout << "Checking to see if the program is misoptimized when " 202be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner << (Funcs.size()==1 ? "this function is" : "these functions are") 203be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner << " run through the pass" 204a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner << (BD.getPassesToRun().size() == 1 ? "" : "es") << ":"; 205efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner PrintFunctionList(Funcs); 206be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner std::cout << "\n"; 207640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 208be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner // Split the module into the two halves of the program we want. 209efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *ToNotOptimize = CloneModule(BD.getProgram()); 210efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize, Funcs); 211640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 212b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner // Run the predicate, not that the predicate will delete both input modules. 213b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner return TestFn(BD, ToOptimize, ToNotOptimize); 214640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner} 215640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 2168c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// DisambiguateGlobalSymbols - Mangle symbols to guarantee uniqueness by 2178c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// modifying predominantly internal symbols rather than external ones. 2188c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 21936ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattnerstatic void DisambiguateGlobalSymbols(Module *M) { 22036ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // Try not to cause collisions by minimizing chances of renaming an 22136ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // already-external symbol, so take in external globals and functions as-is. 22236ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // The code should work correctly without disambiguation (assuming the same 22336ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // mangler is used by the two code generators), but having symbols with the 22436ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // same name causes warnings to be emitted by the code generator. 22536ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner Mangler Mang(*M); 22636ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner for (Module::giterator I = M->gbegin(), E = M->gend(); I != E; ++I) 22736ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner I->setName(Mang.getValueName(I)); 22836ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I) 22936ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner I->setName(Mang.getValueName(I)); 23036ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner} 23136ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner 232a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner/// ExtractLoops - Given a reduced list of functions that still exposed the bug, 233a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner/// check to see if we can extract the loops in the region without obscuring the 234a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner/// bug. If so, it reduces the amount of code identified. 2358c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 236b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattnerstatic bool ExtractLoops(BugDriver &BD, 237b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner bool (*TestFn)(BugDriver &, Module *, Module *), 238a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::vector<Function*> &MiscompiledFunctions) { 239a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner bool MadeChange = false; 240a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner while (1) { 241a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner Module *ToNotOptimize = CloneModule(BD.getProgram()); 242a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize, 243a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner MiscompiledFunctions); 244a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner Module *ToOptimizeLoopExtracted = BD.ExtractLoop(ToOptimize); 245a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner if (!ToOptimizeLoopExtracted) { 246a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // If the loop extractor crashed or if there were no extractible loops, 247a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // then this chapter of our odyssey is over with. 248a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner delete ToNotOptimize; 249a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner delete ToOptimize; 250a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner return MadeChange; 251a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner } 252a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 253a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::cerr << "Extracted a loop from the breaking portion of the program.\n"; 254a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner delete ToOptimize; 255a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 256a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // Bugpoint is intentionally not very trusting of LLVM transformations. In 257a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // particular, we're not going to assume that the loop extractor works, so 258a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // we're going to test the newly loop extracted program to make sure nothing 259a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // has broken. If something broke, then we'll inform the user and stop 260a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // extraction. 261a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner AbstractInterpreter *AI = BD.switchToCBE(); 262a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner if (TestMergedProgram(BD, ToOptimizeLoopExtracted, ToNotOptimize, false)) { 263a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner BD.switchToInterpreter(AI); 264a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 265a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // Merged program doesn't work anymore! 266a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::cerr << " *** ERROR: Loop extraction broke the program. :(" 267a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner << " Please report a bug!\n"; 268a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::cerr << " Continuing on with un-loop-extracted version.\n"; 269a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner delete ToNotOptimize; 270a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner delete ToOptimizeLoopExtracted; 271a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner return MadeChange; 272a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner } 273a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner BD.switchToInterpreter(AI); 274a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 275b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << " Testing after loop extraction:\n"; 276b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner // Clone modules, the tester function will free them. 277b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner Module *TOLEBackup = CloneModule(ToOptimizeLoopExtracted); 278b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner Module *TNOBackup = CloneModule(ToNotOptimize); 279b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner if (!TestFn(BD, ToOptimizeLoopExtracted, ToNotOptimize)) { 280b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << "*** Loop extraction masked the problem. Undoing.\n"; 281a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // If the program is not still broken, then loop extraction did something 282a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // that masked the error. Stop loop extraction now. 283b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner delete TOLEBackup; 284b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner delete TNOBackup; 285a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner return MadeChange; 286a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner } 287b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ToOptimizeLoopExtracted = TOLEBackup; 288b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ToNotOptimize = TNOBackup; 289b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 290b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << "*** Loop extraction successful!\n"; 291a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 292a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // Okay, great! Now we know that we extracted a loop and that loop 293a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // extraction both didn't break the program, and didn't mask the problem. 294a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // Replace the current program with the loop extracted version, and try to 295a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // extract another loop. 296a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::string ErrorMsg; 297a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner if (LinkModules(ToNotOptimize, ToOptimizeLoopExtracted, &ErrorMsg)) { 298a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::cerr << BD.getToolName() << ": Error linking modules together:" 299a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner << ErrorMsg << "\n"; 300a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner exit(1); 301a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner } 302d3a533d94dae1e57194001af08763eb3ba199c8fChris Lattner 303d3a533d94dae1e57194001af08763eb3ba199c8fChris Lattner // All of the Function*'s in the MiscompiledFunctions list are in the old 3045313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner // module. Update this list to include all of the functions in the 3055313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner // optimized and loop extracted module. 3065313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner MiscompiledFunctions.clear(); 3075313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner for (Module::iterator I = ToOptimizeLoopExtracted->begin(), 3085313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner E = ToOptimizeLoopExtracted->end(); I != E; ++I) { 3095313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner if (!I->isExternal()) { 31002bb481881fe6aaa876f9bf79f38f40f56a35a01Chris Lattner Function *NewF = ToNotOptimize->getFunction(I->getName(), 31102bb481881fe6aaa876f9bf79f38f40f56a35a01Chris Lattner I->getFunctionType()); 3125313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner assert(NewF && "Function not found??"); 3135313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner MiscompiledFunctions.push_back(NewF); 3145313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner } 315d3a533d94dae1e57194001af08763eb3ba199c8fChris Lattner } 3165313f23b8c3d22a2028beb731c60fc1a25beb149Chris Lattner delete ToOptimizeLoopExtracted; 317d3a533d94dae1e57194001af08763eb3ba199c8fChris Lattner 318a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner BD.setNewProgram(ToNotOptimize); 319a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner MadeChange = true; 320a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner } 321a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner} 322a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 323b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner/// DebugAMiscompilation - This is a generic driver to narrow down 324b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner/// miscompilations, either in an optimization or a code generator. 3258c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 326b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattnerstatic std::vector<Function*> 327b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris LattnerDebugAMiscompilation(BugDriver &BD, 328b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner bool (*TestFn)(BugDriver &, Module *, Module *)) { 329640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Okay, now that we have reduced the list of passes which are causing the 330640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // failure, see if we can pin down which functions are being 331640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // miscompiled... first build a list of all of the non-external functions in 332640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // the program. 333640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner std::vector<Function*> MiscompiledFunctions; 334b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner Module *Prog = BD.getProgram(); 335b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner for (Module::iterator I = Prog->begin(), E = Prog->end(); I != E; ++I) 336640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner if (!I->isExternal()) 337640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner MiscompiledFunctions.push_back(I); 3384a10645c70199c8d8567fbc46312158c419720abChris Lattner 339640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Do the reduction... 340b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions); 341640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner 342de9750def7c5ca6cb789f3bba7c913e237cdf849Chris Lattner std::cout << "\n*** The following function" 343de9750def7c5ca6cb789f3bba7c913e237cdf849Chris Lattner << (MiscompiledFunctions.size() == 1 ? " is" : "s are") 344de9750def7c5ca6cb789f3bba7c913e237cdf849Chris Lattner << " being miscompiled: "; 345640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner PrintFunctionList(MiscompiledFunctions); 346640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner std::cout << "\n"; 3474a10645c70199c8d8567fbc46312158c419720abChris Lattner 348a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // See if we can rip any loops out of the miscompiled functions and still 349a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // trigger the problem. 350b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner if (ExtractLoops(BD, TestFn, MiscompiledFunctions)) { 351a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // Okay, we extracted some loops and the problem still appears. See if we 352a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // can eliminate some of the created functions from being candidates. 353a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 35436ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // Loop extraction can introduce functions with the same name (foo_code). 35536ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // Make sure to disambiguate the symbols so that when the program is split 35636ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner // apart that we can link it back together again. 35736ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner DisambiguateGlobalSymbols(BD.getProgram()); 35836ee07ff9d26a2c6ebf9faf9ba90923644db29c5Chris Lattner 359a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner // Do the reduction... 360b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions); 361a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 362a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::cout << "\n*** The following function" 363a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner << (MiscompiledFunctions.size() == 1 ? " is" : "s are") 364a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner << " being miscompiled: "; 365a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner PrintFunctionList(MiscompiledFunctions); 366a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner std::cout << "\n"; 367a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner } 368a1cf1c8c87f10f12343ff6ae75f332390e7205abChris Lattner 369b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner return MiscompiledFunctions; 370b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner} 371b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 372a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// TestOptimizer - This is the predicate function used to check to see if the 373a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// "Test" portion of the program is misoptimized. If so, return true. In any 374a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// case, both module arguments are deleted. 3758c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 376b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattnerstatic bool TestOptimizer(BugDriver &BD, Module *Test, Module *Safe) { 377b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner // Run the optimization passes on ToOptimize, producing a transformed version 378b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner // of the functions being tested. 379b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << " Optimizing functions being tested: "; 380b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner Module *Optimized = BD.runPassesOn(Test, BD.getPassesToRun(), 381b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner /*AutoDebugCrashes*/true); 382b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << "done.\n"; 383b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner delete Test; 384b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 385b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << " Checking to see if the merged program executes correctly: "; 3862423db0e8577e769ac5ad4e567808e43daf37945Chris Lattner bool Broken = TestMergedProgram(BD, Optimized, Safe, true); 387b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << (Broken ? " nope.\n" : " yup.\n"); 388b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner return Broken; 389b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner} 390b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 391b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 392b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner/// debugMiscompilation - This method is used when the passes selected are not 393b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner/// crashing, but the generated output is semantically different from the 394b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner/// input. 395b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner/// 396b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattnerbool BugDriver::debugMiscompilation() { 397b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner // Make sure something was miscompiled... 398b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner if (!ReduceMiscompilingPasses(*this).reduceList(PassesToRun)) { 399b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cerr << "*** Optimized program matches reference output! No problem " 400b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner << "detected...\nbugpoint can't help you with your problem!\n"; 401b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner return false; 402b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner } 403b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 404b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::cout << "\n*** Found miscompiling pass" 405b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner << (getPassesToRun().size() == 1 ? "" : "es") << ": " 406b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner << getPassesString(getPassesToRun()) << "\n"; 407b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner EmitProgressBytecode("passinput"); 408b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 409b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner std::vector<Function*> MiscompiledFunctions = 410b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner DebugAMiscompilation(*this, TestOptimizer); 411b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner 412640f22e66d90439857a97a83896ee68c4f7128c9Chris Lattner // Output a bunch of bytecode files for the user... 413be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner std::cout << "Outputting reduced bytecode files which expose the problem:\n"; 414efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *ToNotOptimize = CloneModule(getProgram()); 415efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize, 416efdc0b505712d1ca4460def27e51c430f033d58dChris Lattner MiscompiledFunctions); 417be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner 418be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner std::cout << " Non-optimized portion: "; 419b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ToNotOptimize = swapProgramIn(ToNotOptimize); 420be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner EmitProgressBytecode("tonotoptimize", true); 421be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner setNewProgram(ToNotOptimize); // Delete hacked module. 422be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner 423be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner std::cout << " Portion that is input to optimizer: "; 424b15825b0a29e527b361b63a6e41aff5fdb8fdd5aChris Lattner ToOptimize = swapProgramIn(ToOptimize); 425be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner EmitProgressBytecode("tooptimize"); 426be21ca54e08339ede5dd4bbb882182d22e274988Chris Lattner setNewProgram(ToOptimize); // Delete hacked module. 4274a10645c70199c8d8567fbc46312158c419720abChris Lattner 4284a10645c70199c8d8567fbc46312158c419720abChris Lattner return false; 4294a10645c70199c8d8567fbc46312158c419720abChris Lattner} 430d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 431a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// CleanupAndPrepareModules - Get the specified modules ready for code 432a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// generator testing. 4338c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 434a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattnerstatic void CleanupAndPrepareModules(BugDriver &BD, Module *&Test, 435a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Module *Safe) { 436a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Clean up the modules, removing extra cruft that we don't need anymore... 437a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Test = BD.performFinalCleanups(Test); 438a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 439a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // If we are executing the JIT, we have several nasty issues to take care of. 440a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (!BD.isExecutingJIT()) return; 441a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 442a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // First, if the main function is in the Safe module, we must add a stub to 443a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // the Test module to call into it. Thus, we create a new function `main' 444a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // which just calls the old one. 445a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (Function *oldMain = Safe->getNamedFunction("main")) 446a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (!oldMain->isExternal()) { 447a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Rename it 448a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner oldMain->setName("llvm_bugpoint_old_main"); 449a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Create a NEW `main' function with same type in the test module. 450a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Function *newMain = new Function(oldMain->getFunctionType(), 451a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner GlobalValue::ExternalLinkage, 452a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner "main", Test); 453a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Create an `oldmain' prototype in the test module, which will 454a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // corresponds to the real main function in the same module. 455a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Function *oldMainProto = new Function(oldMain->getFunctionType(), 456a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner GlobalValue::ExternalLinkage, 457a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner oldMain->getName(), Test); 458a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Set up and remember the argument list for the main function. 459a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::vector<Value*> args; 460a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner for (Function::aiterator I = newMain->abegin(), E = newMain->aend(), 461a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner OI = oldMain->abegin(); I != E; ++I, ++OI) { 462a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner I->setName(OI->getName()); // Copy argument names from oldMain 463a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner args.push_back(I); 464a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 465a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 466a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Call the old main function and return its result 467a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner BasicBlock *BB = new BasicBlock("entry", newMain); 468a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner CallInst *call = new CallInst(oldMainProto, args); 469a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner BB->getInstList().push_back(call); 470a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 471a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // If the type of old function wasn't void, return value of call 472a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner new ReturnInst(oldMain->getReturnType() != Type::VoidTy ? call : 0, BB); 473a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 474a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 475a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // The second nasty issue we must deal with in the JIT is that the Safe 476a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // module cannot directly reference any functions defined in the test 477a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // module. Instead, we use a JIT API call to dynamically resolve the 478a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // symbol. 479a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 480a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Add the resolver to the Safe module. 481a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Prototype: void *getPointerToNamedFunction(const char* Name) 482a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Function *resolverFunc = 483a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Safe->getOrInsertFunction("getPointerToNamedFunction", 484a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner PointerType::get(Type::SByteTy), 485a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner PointerType::get(Type::SByteTy), 0); 486a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 487a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Use the function we just added to get addresses of functions we need. 488dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman for (Module::iterator F = Safe->begin(), E = Safe->end(); F != E; ++F) { 489a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (F->isExternal() && !F->use_empty() && &*F != resolverFunc && 490a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner F->getIntrinsicID() == 0 /* ignore intrinsics */) { 491dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman Function *TestFn = Test->getFunction(F->getName(), F->getFunctionType()); 492a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 493a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Don't forward functions which are external in the test module too. 494a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (TestFn && !TestFn->isExternal()) { 495a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // 1. Add a string constant with its name to the global file 496a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Constant *InitArray = ConstantArray::get(F->getName()); 497a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner GlobalVariable *funcName = 498a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner new GlobalVariable(InitArray->getType(), true /*isConstant*/, 499a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner GlobalValue::InternalLinkage, InitArray, 500a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner F->getName() + "_name", Safe); 501a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 502a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // 2. Use `GetElementPtr *funcName, 0, 0' to convert the string to an 503a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // sbyte* so it matches the signature of the resolver function. 504a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 505a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // GetElementPtr *funcName, ulong 0, ulong 0 506a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::vector<Constant*> GEPargs(2,Constant::getNullValue(Type::IntTy)); 507a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Value *GEP = 508a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner ConstantExpr::getGetElementPtr(ConstantPointerRef::get(funcName), 509a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner GEPargs); 510a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::vector<Value*> ResolverArgs; 511a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner ResolverArgs.push_back(GEP); 512a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 513de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // Rewrite uses of F in global initializers, etc. to uses of a wrapper 514de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // function that dynamically resolves the calls to F via our JIT API 515de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman if (F->use_begin() != F->use_end()) { 516de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // Construct a new stub function that will re-route calls to F 517dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman const FunctionType *FuncTy = F->getFunctionType(); 518de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman Function *FuncWrapper = new Function(FuncTy, 519de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman GlobalValue::InternalLinkage, 520dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman F->getName() + "_wrapper", 521dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman F->getParent()); 522dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman BasicBlock *Header = new BasicBlock("header", FuncWrapper); 523dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman 524de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // Resolve the call to function F via the JIT API: 525de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // 526de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // call resolver(GetElementPtr...) 527de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman CallInst *resolve = new CallInst(resolverFunc, ResolverArgs, 528de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman "resolver"); 529de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman Header->getInstList().push_back(resolve); 530de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // cast the result from the resolver to correctly-typed function 531de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman CastInst *castResolver = 532de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman new CastInst(resolve, PointerType::get(F->getFunctionType()), 533de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman "resolverCast"); 534de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman Header->getInstList().push_back(castResolver); 535de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman 536dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman // Save the argument list 537dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman std::vector<Value*> Args; 538dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman for (Function::aiterator i = FuncWrapper->abegin(), 539dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman e = FuncWrapper->aend(); i != e; ++i) 540dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman Args.push_back(i); 541dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman 542dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman // Pass on the arguments to the real function, return its result 543dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman if (F->getReturnType() == Type::VoidTy) { 544de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman CallInst *Call = new CallInst(castResolver, Args); 545dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman Header->getInstList().push_back(Call); 546dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman ReturnInst *Ret = new ReturnInst(); 547dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman Header->getInstList().push_back(Ret); 548dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman } else { 549de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman CallInst *Call = new CallInst(castResolver, Args, "redir"); 550dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman Header->getInstList().push_back(Call); 551dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman ReturnInst *Ret = new ReturnInst(Call); 552dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman Header->getInstList().push_back(Ret); 553dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman } 554dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman 555de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman // Use the wrapper function instead of the old function 556de4803d0af6824a2d5da41fa09b512084c73ce34Misha Brukman F->replaceAllUsesWith(FuncWrapper); 557dc7fef83dcab053f86119d00478e6b008166fcf5Misha Brukman } 558a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 559a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 560a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 561a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 562a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (verifyModule(*Test) || verifyModule(*Safe)) { 563a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << "Bugpoint has a bug, which corrupted a module!!\n"; 564a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner abort(); 565a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 566a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner} 567a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 568a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 569a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 570a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// TestCodeGenerator - This is the predicate function used to check to see if 571a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// the "Test" portion of the program is miscompiled by the code generator under 572a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner/// test. If so, return true. In any case, both module arguments are deleted. 5738c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 574a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattnerstatic bool TestCodeGenerator(BugDriver &BD, Module *Test, Module *Safe) { 575a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner CleanupAndPrepareModules(BD, Test, Safe); 576a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 577a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string TestModuleBC = getUniqueFilename("bugpoint.test.bc"); 578a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (BD.writeProgramToFile(TestModuleBC, Test)) { 579a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << "Error writing bytecode to `" << TestModuleBC << "'\nExiting."; 580a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner exit(1); 581a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 582a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner delete Test; 583a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 584a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Make the shared library 585a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string SafeModuleBC = getUniqueFilename("bugpoint.safe.bc"); 586a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 587a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (BD.writeProgramToFile(SafeModuleBC, Safe)) { 588a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << "Error writing bytecode to `" << SafeModuleBC << "'\nExiting."; 589a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner exit(1); 590a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 591a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string SharedObject = BD.compileSharedObject(SafeModuleBC); 592a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner delete Safe; 593a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 594a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Run the code generator on the `Test' code, loading the shared library. 595a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // The function returns whether or not the new output differs from reference. 596a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner int Result = BD.diffProgram(TestModuleBC, SharedObject, false); 597a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 598a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (Result) 599a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << ": still failing!\n"; 600a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner else 601a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << ": didn't fail.\n"; 602a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner removeFile(TestModuleBC); 603a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner removeFile(SafeModuleBC); 604a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner removeFile(SharedObject); 605a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 606a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner return Result; 607a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner} 608a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 609a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 6108c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// debugCodeGenerator - debug errors in LLC, LLI, or CBE. 6118c194eaa0577a207bb1ea91bf2c2a5e664fce9eeMisha Brukman/// 612a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattnerbool BugDriver::debugCodeGenerator() { 613a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if ((void*)cbe == (void*)Interpreter) { 614a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string Result = executeProgramWithCBE("bugpoint.cbe.out"); 615a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << "\n*** The C backend cannot match the reference diff, but it " 616a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << "is used as the 'known good'\n code generator, so I can't" 617a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << " debug it. Perhaps you have a front-end problem?\n As a" 618a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << " sanity check, I left the result of executing the program " 619a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << "with the C backend\n in this file for you: '" 620a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << Result << "'.\n"; 621a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner return true; 622a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 623a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 624a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner DisambiguateGlobalSymbols(Program); 625a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 626a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::vector<Function*> Funcs = DebugAMiscompilation(*this, TestCodeGenerator); 627a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 628a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Split the module into the two halves of the program we want. 629a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Module *ToNotCodeGen = CloneModule(getProgram()); 630a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner Module *ToCodeGen = SplitFunctionsOutOfModule(ToNotCodeGen, Funcs); 631a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 632a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Condition the modules 633a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner CleanupAndPrepareModules(*this, ToCodeGen, ToNotCodeGen); 634a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 635a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string TestModuleBC = getUniqueFilename("bugpoint.test.bc"); 636a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (writeProgramToFile(TestModuleBC, ToCodeGen)) { 637a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << "Error writing bytecode to `" << TestModuleBC << "'\nExiting."; 638a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner exit(1); 639a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 640a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner delete ToCodeGen; 641a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 642a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner // Make the shared library 643a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string SafeModuleBC = getUniqueFilename("bugpoint.safe.bc"); 644a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (writeProgramToFile(SafeModuleBC, ToNotCodeGen)) { 645a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cerr << "Error writing bytecode to `" << SafeModuleBC << "'\nExiting."; 646a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner exit(1); 647a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 648a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::string SharedObject = compileSharedObject(SafeModuleBC); 649a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner delete ToNotCodeGen; 650a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 651a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << "You can reproduce the problem with the command line: \n"; 652a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner if (isExecutingJIT()) { 653a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << " lli -load " << SharedObject << " " << TestModuleBC; 654a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } else { 655a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << " llc " << TestModuleBC << " -o " << TestModuleBC << ".s\n"; 656a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << " gcc " << SharedObject << " " << TestModuleBC 657a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << ".s -o " << TestModuleBC << ".exe -Wl,-R.\n"; 658a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << " " << TestModuleBC << ".exe"; 659a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner } 660a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner for (unsigned i=0, e = InputArgv.size(); i != e; ++i) 661a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << " " << InputArgv[i]; 662a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << "\n"; 663a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner std::cout << "The shared object was created with:\n llc -march=c " 664a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << SafeModuleBC << " -o temporary.c\n" 665a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << " gcc -xc temporary.c -O2 -o " << SharedObject 666a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#if defined(sparc) || defined(__sparc__) || defined(__sparcv9) 667a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << " -G" // Compile a shared library, `-G' for Sparc 668a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#else 669a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << " -shared" // `-shared' for Linux/X86, maybe others 670a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner#endif 671a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner << " -fno-strict-aliasing\n"; 672a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner 673a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner return false; 674a57d86b436549503a7f96c5266444e022bdbaf55Chris Lattner} 675