#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/Analysis/Verifier.h"
-#include "llvm/Support/Mangler.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileUtilities.h"
using namespace llvm;
namespace llvm {
+ extern cl::opt<std::string> OutputPrefix;
extern cl::list<std::string> InputArgv;
}
ReduceMiscompilingPasses(BugDriver &bd) : BD(bd) {}
virtual TestResult doTest(std::vector<const PassInfo*> &Prefix,
- std::vector<const PassInfo*> &Suffix);
+ std::vector<const PassInfo*> &Suffix,
+ std::string &Error);
};
}
///
ReduceMiscompilingPasses::TestResult
ReduceMiscompilingPasses::doTest(std::vector<const PassInfo*> &Prefix,
- std::vector<const PassInfo*> &Suffix) {
+ std::vector<const PassInfo*> &Suffix,
+ std::string &Error) {
// First, run the program with just the Suffix passes. If it is still broken
// with JUST the kept passes, discard the prefix passes.
outs() << "Checking to see if '" << getPassesString(Suffix)
<< "' compiles correctly: ";
std::string BitcodeResult;
- if (BD.runPasses(Suffix, BitcodeResult, false/*delete*/, true/*quiet*/)) {
+ if (BD.runPasses(BD.getProgram(), Suffix, BitcodeResult, false/*delete*/,
+ true/*quiet*/)) {
errs() << " Error running this sequence of passes"
<< " on the input program!\n";
BD.setPassesToRun(Suffix);
- BD.EmitProgressBitcode("pass-error", false);
+ BD.EmitProgressBitcode(BD.getProgram(), "pass-error", false);
exit(BD.debugOptimizerCrash());
}
// Check to see if the finished program matches the reference output...
- if (BD.diffProgram(BitcodeResult, "", true /*delete bitcode*/)) {
+ bool Diff = BD.diffProgram(BD.getProgram(), BitcodeResult, "",
+ true /*delete bitcode*/, &Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Diff) {
outs() << " nope.\n";
if (Suffix.empty()) {
errs() << BD.getToolName() << ": I'm confused: the test fails when "
// kept passes, we can update our bitcode file to include the result of the
// prefix passes, then discard the prefix passes.
//
- if (BD.runPasses(Prefix, BitcodeResult, false/*delete*/, true/*quiet*/)) {
+ if (BD.runPasses(BD.getProgram(), Prefix, BitcodeResult, false/*delete*/,
+ true/*quiet*/)) {
errs() << " Error running this sequence of passes"
<< " on the input program!\n";
BD.setPassesToRun(Prefix);
- BD.EmitProgressBitcode("pass-error", false);
+ BD.EmitProgressBitcode(BD.getProgram(), "pass-error", false);
exit(BD.debugOptimizerCrash());
}
// If the prefix maintains the predicate by itself, only keep the prefix!
- if (BD.diffProgram(BitcodeResult)) {
+ Diff = BD.diffProgram(BD.getProgram(), BitcodeResult, "", false, &Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Diff) {
outs() << " nope.\n";
sys::Path(BitcodeResult).eraseFromDisk();
return KeepPrefix;
// Ok, so now we know that the prefix passes work, try running the suffix
// passes on the result of the prefix passes.
//
- Module *PrefixOutput = ParseInputFile(BitcodeResult, BD.getContext());
+ OwningPtr<Module> PrefixOutput(ParseInputFile(BitcodeResult,
+ BD.getContext()));
if (PrefixOutput == 0) {
errs() << BD.getToolName() << ": Error reading bitcode file '"
<< BitcodeResult << "'!\n";
<< "' passes compile correctly after the '"
<< getPassesString(Prefix) << "' passes: ";
- Module *OriginalInput = BD.swapProgramIn(PrefixOutput);
- if (BD.runPasses(Suffix, BitcodeResult, false/*delete*/, true/*quiet*/)) {
+ OwningPtr<Module> OriginalInput(BD.swapProgramIn(PrefixOutput.take()));
+ if (BD.runPasses(BD.getProgram(), Suffix, BitcodeResult, false/*delete*/,
+ true/*quiet*/)) {
errs() << " Error running this sequence of passes"
<< " on the input program!\n";
BD.setPassesToRun(Suffix);
- BD.EmitProgressBitcode("pass-error", false);
+ BD.EmitProgressBitcode(BD.getProgram(), "pass-error", false);
exit(BD.debugOptimizerCrash());
}
// Run the result...
- if (BD.diffProgram(BitcodeResult, "", true/*delete bitcode*/)) {
+ Diff = BD.diffProgram(BD.getProgram(), BitcodeResult, "",
+ true /*delete bitcode*/, &Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Diff) {
outs() << " nope.\n";
- delete OriginalInput; // We pruned down the original input...
return KeepSuffix;
}
// Otherwise, we must not be running the bad pass anymore.
outs() << " yup.\n"; // No miscompilation!
- delete BD.swapProgramIn(OriginalInput); // Restore orig program & free test
+ // Restore orig program & free test.
+ delete BD.swapProgramIn(OriginalInput.take());
return NoFailure;
}
namespace {
class ReduceMiscompilingFunctions : public ListReducer<Function*> {
BugDriver &BD;
- bool (*TestFn)(BugDriver &, Module *, Module *);
+ bool (*TestFn)(BugDriver &, Module *, Module *, std::string &);
public:
ReduceMiscompilingFunctions(BugDriver &bd,
- bool (*F)(BugDriver &, Module *, Module *))
+ bool (*F)(BugDriver &, Module *, Module *,
+ std::string &))
: BD(bd), TestFn(F) {}
virtual TestResult doTest(std::vector<Function*> &Prefix,
- std::vector<Function*> &Suffix) {
- if (!Suffix.empty() && TestFuncs(Suffix))
- return KeepSuffix;
- if (!Prefix.empty() && TestFuncs(Prefix))
- return KeepPrefix;
+ std::vector<Function*> &Suffix,
+ std::string &Error) {
+ if (!Suffix.empty()) {
+ bool Ret = TestFuncs(Suffix, Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Ret)
+ return KeepSuffix;
+ }
+ if (!Prefix.empty()) {
+ bool Ret = TestFuncs(Prefix, Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Ret)
+ return KeepPrefix;
+ }
return NoFailure;
}
- bool TestFuncs(const std::vector<Function*> &Prefix);
+ bool TestFuncs(const std::vector<Function*> &Prefix, std::string &Error);
};
}
/// TestMergedProgram - Given two modules, link them together and run the
-/// program, checking to see if the program matches the diff. If the diff
-/// matches, return false, otherwise return true. If the DeleteInputs argument
-/// is set to true then this function deletes both input modules before it
-/// returns.
+/// program, checking to see if the program matches the diff. If there is
+/// an error, return NULL. If not, return the merged module. The Broken argument
+/// will be set to true if the output is different. If the DeleteInputs
+/// argument is set to true then this function deletes both input
+/// modules before it returns.
///
-static bool TestMergedProgram(BugDriver &BD, Module *M1, Module *M2,
- bool DeleteInputs) {
+static Module *TestMergedProgram(const BugDriver &BD, Module *M1, Module *M2,
+ bool DeleteInputs, std::string &Error,
+ bool &Broken) {
// Link the two portions of the program back to together.
std::string ErrorMsg;
if (!DeleteInputs) {
}
delete M2; // We are done with this module.
- Module *OldProgram = BD.swapProgramIn(M1);
-
- // Execute the program. If it does not match the expected output, we must
- // return true.
- bool Broken = BD.diffProgram();
-
- // Delete the linked module & restore the original
- BD.swapProgramIn(OldProgram);
- delete M1;
- return Broken;
+ // Execute the program.
+ Broken = BD.diffProgram(M1, "", "", false, &Error);
+ if (!Error.empty()) {
+ // Delete the linked module
+ delete M1;
+ return NULL;
+ }
+ return M1;
}
/// TestFuncs - split functions in a Module into two groups: those that are
/// under consideration for miscompilation vs. those that are not, and test
/// accordingly. Each group of functions becomes a separate Module.
///
-bool ReduceMiscompilingFunctions::TestFuncs(const std::vector<Function*>&Funcs){
+bool ReduceMiscompilingFunctions::TestFuncs(const std::vector<Function*> &Funcs,
+ std::string &Error) {
// Test to see if the function is misoptimized if we ONLY run it on the
// functions listed in Funcs.
outs() << "Checking to see if the program is misoptimized when "
PrintFunctionList(Funcs);
outs() << '\n';
+ // Create a clone for two reasons:
+ // * If the optimization passes delete any function, the deleted function
+ // will be in the clone and Funcs will still point to valid memory
+ // * If the optimization passes use interprocedural information to break
+ // a function, we want to continue with the original function. Otherwise
+ // we can conclude that a function triggers the bug when in fact one
+ // needs a larger set of original functions to do so.
+ ValueMap<const Value*, Value*> VMap;
+ Module *Clone = CloneModule(BD.getProgram(), VMap);
+ Module *Orig = BD.swapProgramIn(Clone);
+
+ std::vector<Function*> FuncsOnClone;
+ for (unsigned i = 0, e = Funcs.size(); i != e; ++i) {
+ Function *F = cast<Function>(VMap[Funcs[i]]);
+ FuncsOnClone.push_back(F);
+ }
+
// Split the module into the two halves of the program we want.
- DenseMap<const Value*, Value*> ValueMap;
- Module *ToNotOptimize = CloneModule(BD.getProgram(), ValueMap);
- Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize, Funcs,
- ValueMap);
+ VMap.clear();
+ Module *ToNotOptimize = CloneModule(BD.getProgram(), VMap);
+ Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize, FuncsOnClone,
+ VMap);
// Run the predicate, note that the predicate will delete both input modules.
- return TestFn(BD, ToOptimize, ToNotOptimize);
+ bool Broken = TestFn(BD, ToOptimize, ToNotOptimize, Error);
+
+ delete BD.swapProgramIn(Orig);
+
+ return Broken;
}
-/// DisambiguateGlobalSymbols - Mangle symbols to guarantee uniqueness by
-/// modifying predominantly internal symbols rather than external ones.
+/// DisambiguateGlobalSymbols - Give anonymous global values names.
///
static void DisambiguateGlobalSymbols(Module *M) {
- // Try not to cause collisions by minimizing chances of renaming an
- // already-external symbol, so take in external globals and functions as-is.
- // The code should work correctly without disambiguation (assuming the same
- // mangler is used by the two code generators), but having symbols with the
- // same name causes warnings to be emitted by the code generator.
- Mangler Mang(*M);
- // Agree with the CBE on symbol naming
- Mang.markCharUnacceptable('.');
for (Module::global_iterator I = M->global_begin(), E = M->global_end();
- I != E; ++I) {
- // Don't mangle asm names.
- if (!I->hasName() || I->getName()[0] != 1)
- I->setName(Mang.getMangledName(I));
- }
- for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I) {
- // Don't mangle asm names or intrinsics.
- if ((!I->hasName() || I->getName()[0] != 1) &&
- I->getIntrinsicID() == 0)
- I->setName(Mang.getMangledName(I));
- }
+ I != E; ++I)
+ if (!I->hasName())
+ I->setName("anon_global");
+ for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
+ if (!I->hasName())
+ I->setName("anon_fn");
}
/// ExtractLoops - Given a reduced list of functions that still exposed the bug,
/// bug. If so, it reduces the amount of code identified.
///
static bool ExtractLoops(BugDriver &BD,
- bool (*TestFn)(BugDriver &, Module *, Module *),
- std::vector<Function*> &MiscompiledFunctions) {
+ bool (*TestFn)(BugDriver &, Module *, Module *,
+ std::string &),
+ std::vector<Function*> &MiscompiledFunctions,
+ std::string &Error) {
bool MadeChange = false;
while (1) {
if (BugpointIsInterrupted) return MadeChange;
- DenseMap<const Value*, Value*> ValueMap;
- Module *ToNotOptimize = CloneModule(BD.getProgram(), ValueMap);
+ ValueMap<const Value*, Value*> VMap;
+ Module *ToNotOptimize = CloneModule(BD.getProgram(), VMap);
Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize,
MiscompiledFunctions,
- ValueMap);
+ VMap);
Module *ToOptimizeLoopExtracted = BD.ExtractLoop(ToOptimize);
if (!ToOptimizeLoopExtracted) {
// If the loop extractor crashed or if there were no extractible loops,
// has broken. If something broke, then we'll inform the user and stop
// extraction.
AbstractInterpreter *AI = BD.switchToSafeInterpreter();
- if (TestMergedProgram(BD, ToOptimizeLoopExtracted, ToNotOptimize, false)) {
+ bool Failure;
+ Module *New = TestMergedProgram(BD, ToOptimizeLoopExtracted, ToNotOptimize,
+ false, Error, Failure);
+ if (!New)
+ return false;
+ // Delete the original and set the new program.
+ delete BD.swapProgramIn(New);
+ if (Failure) {
BD.switchToInterpreter(AI);
// Merged program doesn't work anymore!
<< " Please report a bug!\n";
errs() << " Continuing on with un-loop-extracted version.\n";
- BD.writeProgramToFile("bugpoint-loop-extract-fail-tno.bc", ToNotOptimize);
- BD.writeProgramToFile("bugpoint-loop-extract-fail-to.bc", ToOptimize);
- BD.writeProgramToFile("bugpoint-loop-extract-fail-to-le.bc",
+ BD.writeProgramToFile(OutputPrefix + "-loop-extract-fail-tno.bc",
+ ToNotOptimize);
+ BD.writeProgramToFile(OutputPrefix + "-loop-extract-fail-to.bc",
+ ToOptimize);
+ BD.writeProgramToFile(OutputPrefix + "-loop-extract-fail-to-le.bc",
ToOptimizeLoopExtracted);
- errs() << "Please submit the bugpoint-loop-extract-fail-*.bc files.\n";
+ errs() << "Please submit the "
+ << OutputPrefix << "-loop-extract-fail-*.bc files.\n";
delete ToOptimize;
delete ToNotOptimize;
delete ToOptimizeLoopExtracted;
// Clone modules, the tester function will free them.
Module *TOLEBackup = CloneModule(ToOptimizeLoopExtracted);
Module *TNOBackup = CloneModule(ToNotOptimize);
- if (!TestFn(BD, ToOptimizeLoopExtracted, ToNotOptimize)) {
+ Failure = TestFn(BD, ToOptimizeLoopExtracted, ToNotOptimize, Error);
+ if (!Error.empty())
+ return false;
+ if (!Failure) {
outs() << "*** Loop extraction masked the problem. Undoing.\n";
// If the program is not still broken, then loop extraction did something
// that masked the error. Stop loop extraction now.
namespace {
class ReduceMiscompiledBlocks : public ListReducer<BasicBlock*> {
BugDriver &BD;
- bool (*TestFn)(BugDriver &, Module *, Module *);
+ bool (*TestFn)(BugDriver &, Module *, Module *, std::string &);
std::vector<Function*> FunctionsBeingTested;
public:
ReduceMiscompiledBlocks(BugDriver &bd,
- bool (*F)(BugDriver &, Module *, Module *),
+ bool (*F)(BugDriver &, Module *, Module *,
+ std::string &),
const std::vector<Function*> &Fns)
: BD(bd), TestFn(F), FunctionsBeingTested(Fns) {}
virtual TestResult doTest(std::vector<BasicBlock*> &Prefix,
- std::vector<BasicBlock*> &Suffix) {
- if (!Suffix.empty() && TestFuncs(Suffix))
- return KeepSuffix;
- if (TestFuncs(Prefix))
- return KeepPrefix;
+ std::vector<BasicBlock*> &Suffix,
+ std::string &Error) {
+ if (!Suffix.empty()) {
+ bool Ret = TestFuncs(Suffix, Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Ret)
+ return KeepSuffix;
+ }
+ if (!Prefix.empty()) {
+ bool Ret = TestFuncs(Prefix, Error);
+ if (!Error.empty())
+ return InternalError;
+ if (Ret)
+ return KeepPrefix;
+ }
return NoFailure;
}
- bool TestFuncs(const std::vector<BasicBlock*> &Prefix);
+ bool TestFuncs(const std::vector<BasicBlock*> &BBs, std::string &Error);
};
}
/// TestFuncs - Extract all blocks for the miscompiled functions except for the
/// specified blocks. If the problem still exists, return true.
///
-bool ReduceMiscompiledBlocks::TestFuncs(const std::vector<BasicBlock*> &BBs) {
+bool ReduceMiscompiledBlocks::TestFuncs(const std::vector<BasicBlock*> &BBs,
+ std::string &Error) {
// Test to see if the function is misoptimized if we ONLY run it on the
// functions listed in Funcs.
outs() << "Checking to see if the program is misoptimized when all ";
outs() << '\n';
// Split the module into the two halves of the program we want.
- DenseMap<const Value*, Value*> ValueMap;
- Module *ToNotOptimize = CloneModule(BD.getProgram(), ValueMap);
+ ValueMap<const Value*, Value*> VMap;
+ Module *Clone = CloneModule(BD.getProgram(), VMap);
+ Module *Orig = BD.swapProgramIn(Clone);
+ std::vector<Function*> FuncsOnClone;
+ std::vector<BasicBlock*> BBsOnClone;
+ for (unsigned i = 0, e = FunctionsBeingTested.size(); i != e; ++i) {
+ Function *F = cast<Function>(VMap[FunctionsBeingTested[i]]);
+ FuncsOnClone.push_back(F);
+ }
+ for (unsigned i = 0, e = BBs.size(); i != e; ++i) {
+ BasicBlock *BB = cast<BasicBlock>(VMap[BBs[i]]);
+ BBsOnClone.push_back(BB);
+ }
+ VMap.clear();
+
+ Module *ToNotOptimize = CloneModule(BD.getProgram(), VMap);
Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize,
- FunctionsBeingTested,
- ValueMap);
+ FuncsOnClone,
+ VMap);
// Try the extraction. If it doesn't work, then the block extractor crashed
// or something, in which case bugpoint can't chase down this possibility.
- if (Module *New = BD.ExtractMappedBlocksFromModule(BBs, ToOptimize)) {
+ if (Module *New = BD.ExtractMappedBlocksFromModule(BBsOnClone, ToOptimize)) {
delete ToOptimize;
- // Run the predicate, not that the predicate will delete both input modules.
- return TestFn(BD, New, ToNotOptimize);
+ // Run the predicate,
+ // note that the predicate will delete both input modules.
+ bool Ret = TestFn(BD, New, ToNotOptimize, Error);
+ delete BD.swapProgramIn(Orig);
+ return Ret;
}
+ delete BD.swapProgramIn(Orig);
delete ToOptimize;
delete ToNotOptimize;
return false;
/// the bug.
///
static bool ExtractBlocks(BugDriver &BD,
- bool (*TestFn)(BugDriver &, Module *, Module *),
- std::vector<Function*> &MiscompiledFunctions) {
+ bool (*TestFn)(BugDriver &, Module *, Module *,
+ std::string &),
+ std::vector<Function*> &MiscompiledFunctions,
+ std::string &Error) {
if (BugpointIsInterrupted) return false;
std::vector<BasicBlock*> Blocks;
unsigned OldSize = Blocks.size();
// Check to see if all blocks are extractible first.
- if (ReduceMiscompiledBlocks(BD, TestFn,
- MiscompiledFunctions).TestFuncs(std::vector<BasicBlock*>())) {
+ bool Ret = ReduceMiscompiledBlocks(BD, TestFn, MiscompiledFunctions)
+ .TestFuncs(std::vector<BasicBlock*>(), Error);
+ if (!Error.empty())
+ return false;
+ if (Ret) {
Blocks.clear();
} else {
- ReduceMiscompiledBlocks(BD, TestFn,MiscompiledFunctions).reduceList(Blocks);
+ ReduceMiscompiledBlocks(BD, TestFn,
+ MiscompiledFunctions).reduceList(Blocks, Error);
+ if (!Error.empty())
+ return false;
if (Blocks.size() == OldSize)
return false;
}
- DenseMap<const Value*, Value*> ValueMap;
- Module *ProgClone = CloneModule(BD.getProgram(), ValueMap);
+ ValueMap<const Value*, Value*> VMap;
+ Module *ProgClone = CloneModule(BD.getProgram(), VMap);
Module *ToExtract = SplitFunctionsOutOfModule(ProgClone,
MiscompiledFunctions,
- ValueMap);
+ VMap);
Module *Extracted = BD.ExtractMappedBlocksFromModule(Blocks, ToExtract);
if (Extracted == 0) {
// Weird, extraction should have worked.
///
static std::vector<Function*>
DebugAMiscompilation(BugDriver &BD,
- bool (*TestFn)(BugDriver &, Module *, Module *)) {
+ bool (*TestFn)(BugDriver &, Module *, Module *,
+ std::string &),
+ std::string &Error) {
// Okay, now that we have reduced the list of passes which are causing the
// failure, see if we can pin down which functions are being
// miscompiled... first build a list of all of the non-external functions in
// Do the reduction...
if (!BugpointIsInterrupted)
- ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions);
+ ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions,
+ Error);
+ if (!Error.empty())
+ return MiscompiledFunctions;
outs() << "\n*** The following function"
<< (MiscompiledFunctions.size() == 1 ? " is" : "s are")
// See if we can rip any loops out of the miscompiled functions and still
// trigger the problem.
- if (!BugpointIsInterrupted && !DisableLoopExtraction &&
- ExtractLoops(BD, TestFn, MiscompiledFunctions)) {
- // Okay, we extracted some loops and the problem still appears. See if we
- // can eliminate some of the created functions from being candidates.
-
- // Loop extraction can introduce functions with the same name (foo_code).
- // Make sure to disambiguate the symbols so that when the program is split
- // apart that we can link it back together again.
- DisambiguateGlobalSymbols(BD.getProgram());
-
- // Do the reduction...
- if (!BugpointIsInterrupted)
- ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions);
-
- outs() << "\n*** The following function"
- << (MiscompiledFunctions.size() == 1 ? " is" : "s are")
- << " being miscompiled: ";
- PrintFunctionList(MiscompiledFunctions);
- outs() << '\n';
+ if (!BugpointIsInterrupted && !DisableLoopExtraction) {
+ bool Ret = ExtractLoops(BD, TestFn, MiscompiledFunctions, Error);
+ if (!Error.empty())
+ return MiscompiledFunctions;
+ if (Ret) {
+ // Okay, we extracted some loops and the problem still appears. See if
+ // we can eliminate some of the created functions from being candidates.
+ DisambiguateGlobalSymbols(BD.getProgram());
+
+ // Do the reduction...
+ if (!BugpointIsInterrupted)
+ ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions,
+ Error);
+ if (!Error.empty())
+ return MiscompiledFunctions;
+
+ outs() << "\n*** The following function"
+ << (MiscompiledFunctions.size() == 1 ? " is" : "s are")
+ << " being miscompiled: ";
+ PrintFunctionList(MiscompiledFunctions);
+ outs() << '\n';
+ }
}
- if (!BugpointIsInterrupted && !DisableBlockExtraction &&
- ExtractBlocks(BD, TestFn, MiscompiledFunctions)) {
- // Okay, we extracted some blocks and the problem still appears. See if we
- // can eliminate some of the created functions from being candidates.
-
- // Block extraction can introduce functions with the same name (foo_code).
- // Make sure to disambiguate the symbols so that when the program is split
- // apart that we can link it back together again.
- DisambiguateGlobalSymbols(BD.getProgram());
-
- // Do the reduction...
- ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions);
-
- outs() << "\n*** The following function"
- << (MiscompiledFunctions.size() == 1 ? " is" : "s are")
- << " being miscompiled: ";
- PrintFunctionList(MiscompiledFunctions);
- outs() << '\n';
+ if (!BugpointIsInterrupted && !DisableBlockExtraction) {
+ bool Ret = ExtractBlocks(BD, TestFn, MiscompiledFunctions, Error);
+ if (!Error.empty())
+ return MiscompiledFunctions;
+ if (Ret) {
+ // Okay, we extracted some blocks and the problem still appears. See if
+ // we can eliminate some of the created functions from being candidates.
+ DisambiguateGlobalSymbols(BD.getProgram());
+
+ // Do the reduction...
+ ReduceMiscompilingFunctions(BD, TestFn).reduceList(MiscompiledFunctions,
+ Error);
+ if (!Error.empty())
+ return MiscompiledFunctions;
+
+ outs() << "\n*** The following function"
+ << (MiscompiledFunctions.size() == 1 ? " is" : "s are")
+ << " being miscompiled: ";
+ PrintFunctionList(MiscompiledFunctions);
+ outs() << '\n';
+ }
}
return MiscompiledFunctions;
/// "Test" portion of the program is misoptimized. If so, return true. In any
/// case, both module arguments are deleted.
///
-static bool TestOptimizer(BugDriver &BD, Module *Test, Module *Safe) {
+static bool TestOptimizer(BugDriver &BD, Module *Test, Module *Safe,
+ std::string &Error) {
// Run the optimization passes on ToOptimize, producing a transformed version
// of the functions being tested.
outs() << " Optimizing functions being tested: ";
delete Test;
outs() << " Checking to see if the merged program executes correctly: ";
- bool Broken = TestMergedProgram(BD, Optimized, Safe, true);
- outs() << (Broken ? " nope.\n" : " yup.\n");
+ bool Broken;
+ Module *New = TestMergedProgram(BD, Optimized, Safe, true, Error, Broken);
+ if (New) {
+ outs() << (Broken ? " nope.\n" : " yup.\n");
+ // Delete the original and set the new program.
+ delete BD.swapProgramIn(New);
+ }
return Broken;
}
/// crashing, but the generated output is semantically different from the
/// input.
///
-bool BugDriver::debugMiscompilation() {
+void BugDriver::debugMiscompilation(std::string *Error) {
// Make sure something was miscompiled...
if (!BugpointIsInterrupted)
- if (!ReduceMiscompilingPasses(*this).reduceList(PassesToRun)) {
- errs() << "*** Optimized program matches reference output! No problem"
- << " detected...\nbugpoint can't help you with your problem!\n";
- return false;
+ if (!ReduceMiscompilingPasses(*this).reduceList(PassesToRun, *Error)) {
+ if (Error->empty())
+ errs() << "*** Optimized program matches reference output! No problem"
+ << " detected...\nbugpoint can't help you with your problem!\n";
+ return;
}
outs() << "\n*** Found miscompiling pass"
<< (getPassesToRun().size() == 1 ? "" : "es") << ": "
<< getPassesString(getPassesToRun()) << '\n';
- EmitProgressBitcode("passinput");
+ EmitProgressBitcode(Program, "passinput");
- std::vector<Function*> MiscompiledFunctions =
- DebugAMiscompilation(*this, TestOptimizer);
+ std::vector<Function *> MiscompiledFunctions =
+ DebugAMiscompilation(*this, TestOptimizer, *Error);
+ if (!Error->empty())
+ return;
// Output a bunch of bitcode files for the user...
outs() << "Outputting reduced bitcode files which expose the problem:\n";
- DenseMap<const Value*, Value*> ValueMap;
- Module *ToNotOptimize = CloneModule(getProgram(), ValueMap);
+ ValueMap<const Value*, Value*> VMap;
+ Module *ToNotOptimize = CloneModule(getProgram(), VMap);
Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize,
MiscompiledFunctions,
- ValueMap);
+ VMap);
outs() << " Non-optimized portion: ";
- ToNotOptimize = swapProgramIn(ToNotOptimize);
- EmitProgressBitcode("tonotoptimize", true);
- setNewProgram(ToNotOptimize); // Delete hacked module.
+ EmitProgressBitcode(ToNotOptimize, "tonotoptimize", true);
+ delete ToNotOptimize; // Delete hacked module.
outs() << " Portion that is input to optimizer: ";
- ToOptimize = swapProgramIn(ToOptimize);
- EmitProgressBitcode("tooptimize");
- setNewProgram(ToOptimize); // Delete hacked module.
+ EmitProgressBitcode(ToOptimize, "tooptimize");
+ delete ToOptimize; // Delete hacked module.
- return false;
+ return;
}
/// CleanupAndPrepareModules - Get the specified modules ready for code
// Prototype: void *getPointerToNamedFunction(const char* Name)
Constant *resolverFunc =
Safe->getOrInsertFunction("getPointerToNamedFunction",
- PointerType::getUnqual(Type::getInt8Ty(Safe->getContext())),
- PointerType::getUnqual(Type::getInt8Ty(Safe->getContext())),
+ Type::getInt8PtrTy(Safe->getContext()),
+ Type::getInt8PtrTy(Safe->getContext()),
(Type *)0);
// Use the function we just added to get addresses of functions we need.
Args.push_back(i);
// Pass on the arguments to the real function, return its result
- if (F->getReturnType() == Type::getVoidTy(F->getContext())) {
+ if (F->getReturnType()->isVoidTy()) {
CallInst::Create(FuncPtr, Args.begin(), Args.end(), "", DoCallBB);
ReturnInst::Create(F->getContext(), DoCallBB);
} else {
/// the "Test" portion of the program is miscompiled by the code generator under
/// test. If so, return true. In any case, both module arguments are deleted.
///
-static bool TestCodeGenerator(BugDriver &BD, Module *Test, Module *Safe) {
+static bool TestCodeGenerator(BugDriver &BD, Module *Test, Module *Safe,
+ std::string &Error) {
CleanupAndPrepareModules(BD, Test, Safe);
sys::Path TestModuleBC("bugpoint.test.bc");
}
delete Test;
+ FileRemover TestModuleBCRemover(TestModuleBC, !SaveTemps);
+
// Make the shared library
sys::Path SafeModuleBC("bugpoint.safe.bc");
if (SafeModuleBC.makeUnique(true, &ErrMsg)) {
<< "'\nExiting.";
exit(1);
}
- std::string SharedObject = BD.compileSharedObject(SafeModuleBC.str());
+
+ FileRemover SafeModuleBCRemover(SafeModuleBC, !SaveTemps);
+
+ std::string SharedObject = BD.compileSharedObject(SafeModuleBC.str(), Error);
+ if (!Error.empty())
+ return false;
delete Safe;
+ FileRemover SharedObjectRemover(sys::Path(SharedObject), !SaveTemps);
+
// Run the code generator on the `Test' code, loading the shared library.
// The function returns whether or not the new output differs from reference.
- int Result = BD.diffProgram(TestModuleBC.str(), SharedObject, false);
+ bool Result = BD.diffProgram(BD.getProgram(), TestModuleBC.str(),
+ SharedObject, false, &Error);
+ if (!Error.empty())
+ return false;
if (Result)
errs() << ": still failing!\n";
else
errs() << ": didn't fail.\n";
- TestModuleBC.eraseFromDisk();
- SafeModuleBC.eraseFromDisk();
- sys::Path(SharedObject).eraseFromDisk();
return Result;
}
/// debugCodeGenerator - debug errors in LLC, LLI, or CBE.
///
-bool BugDriver::debugCodeGenerator() {
+bool BugDriver::debugCodeGenerator(std::string *Error) {
if ((void*)SafeInterpreter == (void*)Interpreter) {
- std::string Result = executeProgramSafely("bugpoint.safe.out");
- outs() << "\n*** The \"safe\" i.e. 'known good' backend cannot match "
- << "the reference diff. This may be due to a\n front-end "
- << "bug or a bug in the original program, but this can also "
- << "happen if bugpoint isn't running the program with the "
- << "right flags or input.\n I left the result of executing "
- << "the program with the \"safe\" backend in this file for "
- << "you: '"
- << Result << "'.\n";
+ std::string Result = executeProgramSafely(Program, "bugpoint.safe.out",
+ Error);
+ if (Error->empty()) {
+ outs() << "\n*** The \"safe\" i.e. 'known good' backend cannot match "
+ << "the reference diff. This may be due to a\n front-end "
+ << "bug or a bug in the original program, but this can also "
+ << "happen if bugpoint isn't running the program with the "
+ << "right flags or input.\n I left the result of executing "
+ << "the program with the \"safe\" backend in this file for "
+ << "you: '"
+ << Result << "'.\n";
+ }
return true;
}
DisambiguateGlobalSymbols(Program);
- std::vector<Function*> Funcs = DebugAMiscompilation(*this, TestCodeGenerator);
+ std::vector<Function*> Funcs = DebugAMiscompilation(*this, TestCodeGenerator,
+ *Error);
+ if (!Error->empty())
+ return true;
// Split the module into the two halves of the program we want.
- DenseMap<const Value*, Value*> ValueMap;
- Module *ToNotCodeGen = CloneModule(getProgram(), ValueMap);
- Module *ToCodeGen = SplitFunctionsOutOfModule(ToNotCodeGen, Funcs, ValueMap);
+ ValueMap<const Value*, Value*> VMap;
+ Module *ToNotCodeGen = CloneModule(getProgram(), VMap);
+ Module *ToCodeGen = SplitFunctionsOutOfModule(ToNotCodeGen, Funcs, VMap);
// Condition the modules
CleanupAndPrepareModules(*this, ToCodeGen, ToNotCodeGen);
<< "'\nExiting.";
exit(1);
}
- std::string SharedObject = compileSharedObject(SafeModuleBC.str());
+ std::string SharedObject = compileSharedObject(SafeModuleBC.str(), *Error);
+ if (!Error->empty())
+ return true;
delete ToNotCodeGen;
outs() << "You can reproduce the problem with the command line: \n";
if (isExecutingJIT()) {
outs() << " lli -load " << SharedObject << " " << TestModuleBC.str();
} else {
- outs() << " llc -f " << TestModuleBC.str() << " -o " << TestModuleBC.str()
+ outs() << " llc " << TestModuleBC.str() << " -o " << TestModuleBC.str()
<< ".s\n";
outs() << " gcc " << SharedObject << " " << TestModuleBC.str()
<< ".s -o " << TestModuleBC.str() << ".exe";
outs() << "\n";
outs() << " " << TestModuleBC.str() << ".exe";
}
- for (unsigned i=0, e = InputArgv.size(); i != e; ++i)
+ for (unsigned i = 0, e = InputArgv.size(); i != e; ++i)
outs() << " " << InputArgv[i];
outs() << '\n';
outs() << "The shared object was created with:\n llc -march=c "
projects / oota-llvm.git / blobdiff