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Let AnalyzeAlloca() remove debug intrinsics.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59454 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2008-11-17 18:37:53 +00:00
parent 104de6cf7b
commit b8c564f72e
1 changed files with 11 additions and 20 deletions
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31
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -277,21 +277,6 @@ namespace {
AllocaPointerVal = 0;
}
/// RemoveDebugUses - Remove uses of the alloca in DbgInfoInstrinsics.
void RemoveDebugUses(AllocaInst *AI) {
for (Value::use_iterator U = AI->use_begin(), E = AI->use_end();
U != E;) {
Instruction *User = cast<Instruction>(*U);
++U;
if (BitCastInst *BC = dyn_cast<BitCastInst>(User)) {
assert(BC->hasOneUse() && "Unexpected alloca uses!");
DbgInfoIntrinsic *DI = cast<DbgInfoIntrinsic>(*BC->use_begin());
DI->eraseFromParent();
BC->eraseFromParent();
}
}
}
/// AnalyzeAlloca - Scan the uses of the specified alloca, filling in our
/// ivars.
void AnalyzeAlloca(AllocaInst *AI) {
@ -301,9 +286,18 @@ namespace {
// and decide whether all of the loads and stores to the alloca are within
// the same basic block.
for (Value::use_iterator U = AI->use_begin(), E = AI->use_end();
U != E; ++U) {
U != E;) {
Instruction *User = cast<Instruction>(*U);
if (StoreInst *SI = dyn_cast<StoreInst>(User)) {
++U;
if (BitCastInst *BC = dyn_cast<BitCastInst>(User)) {
// Remove any uses of this alloca in DbgInfoInstrinsics.
assert(BC->hasOneUse() && "Unexpected alloca uses!");
DbgInfoIntrinsic *DI = cast<DbgInfoIntrinsic>(*BC->use_begin());
DI->eraseFromParent();
BC->eraseFromParent();
continue;
}
else if (StoreInst *SI = dyn_cast<StoreInst>(User)) {
// Remember the basic blocks which define new values for the alloca
DefiningBlocks.push_back(SI->getParent());
AllocaPointerVal = SI->getOperand(0);
@ -344,9 +338,6 @@ void PromoteMem2Reg::run() {
assert(AI->getParent()->getParent() == &F &&
"All allocas should be in the same function, which is same as DF!");
// Remove any uses of this alloca in DbgInfoInstrinsics.
Info.RemoveDebugUses(AI);
if (AI->use_empty()) {
// If there are no uses of the alloca, just delete it now.
if (AST) AST->deleteValue(AI);