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several multiple-retval fixes for bugpoint.

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llvm-svn: 50331
This commit is contained in:
Chris Lattner 2008-04-28 00:04:58 +00:00
parent 459f6ed05c
commit 0378973e09
2 changed files with 12 additions and 11 deletions
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19
tools/bugpoint/CrashDebugger.cpp
View File

@ -14,7 +14,7 @@
#include "BugDriver.h"
#include "ToolRunner.h"
#include "ListReducer.h"
#include "llvm/Constant.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
@ -300,17 +300,16 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<const BasicBlock*> &BBs) {
for (succ_iterator SI = succ_begin(BB), E = succ_end(BB); SI != E; ++SI)
(*SI)->removePredecessor(BB);
if (BB->getTerminator()->getType() != Type::VoidTy)
BB->getTerminator()->replaceAllUsesWith(
Constant::getNullValue(BB->getTerminator()->getType()));
TerminatorInst *BBTerm = BB->getTerminator();
if (isa<StructType>(BBTerm->getType()))
BBTerm->replaceAllUsesWith(UndefValue::get(BBTerm->getType()));
else if (BB->getTerminator()->getType() != Type::VoidTy)
BBTerm->replaceAllUsesWith(Constant::getNullValue(BBTerm->getType()));
// Delete the old terminator instruction...
// Replace the old terminator instruction.
BB->getInstList().pop_back();
// Add a new return instruction of the appropriate type...
const Type *RetTy = BB->getParent()->getReturnType();
ReturnInst::Create(RetTy == Type::VoidTy ? 0 :
Constant::getNullValue(RetTy), BB);
new UnreachableInst(BB);
}
// The CFG Simplifier pass may delete one of the basic blocks we are

4
tools/bugpoint/ExtractFunction.cpp
View File

@ -71,7 +71,9 @@ Module *BugDriver::deleteInstructionFromProgram(const Instruction *I,
Instruction *TheInst = RI; // Got the corresponding instruction!
// If this instruction produces a value, replace any users with null values
if (TheInst->getType() != Type::VoidTy)
if (isa<StructType>(TheInst->getType()))
TheInst->replaceAllUsesWith(UndefValue::get(TheInst->getType()));
else if (TheInst->getType() != Type::VoidTy)
TheInst->replaceAllUsesWith(Constant::getNullValue(TheInst->getType()));
// Remove the instruction from the program.