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Remove MallocInst from LLVM Instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84299 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Victor Hernandez
2009-10-17 01:18:07 +00:00
parent 3bdd8de280
commit a276c603b8
25 changed files with 73 additions and 677 deletions
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33
lib/Transforms/Scalar/InstructionCombining.cpp
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@@ -6300,16 +6300,6 @@ Instruction *InstCombiner::visitICmpInst(ICmpInst &I) {
return SelectInst::Create(LHSI->getOperand(0), Op1, Op2);
break;
}
case Instruction::Malloc:
// If we have (malloc != null), and if the malloc has a single use, we
// can assume it is successful and remove the malloc.
if (LHSI->hasOneUse() && isa<ConstantPointerNull>(RHSC)) {
Worklist.Add(LHSI);
return ReplaceInstUsesWith(I,
ConstantInt::get(Type::getInt1Ty(*Context),
!I.isTrueWhenEqual()));
}
break;
case Instruction::Call:
// If we have (malloc != null), and if the malloc has a single use, we
// can assume it is successful and remove the malloc.
@@ -7809,11 +7799,7 @@ Instruction *InstCombiner::PromoteCastOfAllocation(BitCastInst &CI,
Amt = AllocaBuilder.CreateAdd(Amt, Off, "tmp");
}
AllocationInst *New;
if (isa<MallocInst>(AI))
New = AllocaBuilder.CreateMalloc(CastElTy, Amt);
else
New = AllocaBuilder.CreateAlloca(CastElTy, Amt);
AllocationInst *New = AllocaBuilder.CreateAlloca(CastElTy, Amt);
New->setAlignment(AI.getAlignment());
New->takeName(&AI);
@@ -11213,15 +11199,8 @@ Instruction *InstCombiner::visitAllocationInst(AllocationInst &AI) {
if (const ConstantInt *C = dyn_cast<ConstantInt>(AI.getArraySize())) {
const Type *NewTy =
ArrayType::get(AI.getAllocatedType(), C->getZExtValue());
AllocationInst *New = 0;
// Create and insert the replacement instruction...
if (isa<MallocInst>(AI))
New = Builder->CreateMalloc(NewTy, 0, AI.getName());
else {
assert(isa<AllocaInst>(AI) && "Unknown type of allocation inst!");
New = Builder->CreateAlloca(NewTy, 0, AI.getName());
}
assert(isa<AllocaInst>(AI) && "Unknown type of allocation inst!");
AllocationInst *New = Builder->CreateAlloca(NewTy, 0, AI.getName());
New->setAlignment(AI.getAlignment());
// Scan to the end of the allocation instructions, to skip over a block of
@@ -11294,12 +11273,6 @@ Instruction *InstCombiner::visitFreeInst(FreeInst &FI) {
}
}
// Change free(malloc) into nothing, if the malloc has a single use.
if (MallocInst *MI = dyn_cast<MallocInst>(Op))
if (MI->hasOneUse()) {
EraseInstFromFunction(FI);
return EraseInstFromFunction(*MI);
}
if (isMalloc(Op)) {
if (CallInst* CI = extractMallocCallFromBitCast(Op)) {
if (Op->hasOneUse() && CI->hasOneUse()) {