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DbgInfoIntrinsic no longer appear in an instruction's use list 

llvm-svn: 94113
This commit is contained in:
Victor Hernandez 2010-01-21 23:08:36 +00:00
parent 5f5abd598c
commit ae4d949721
1 changed files with 4 additions and 19 deletions
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23
llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -76,16 +76,9 @@ bool llvm::isAllocaPromotable(const AllocaInst *AI) {
return false; // Don't allow a store OF the AI, only INTO the AI. return false; // Don't allow a store OF the AI, only INTO the AI.
if (SI->isVolatile()) if (SI->isVolatile())
return false; return false;
} else if (const BitCastInst *BC = dyn_cast<BitCastInst>(*UI)) { } else if (isa<BitCastInst>(*UI)) {
// A bitcast that does not feed into debug info inhibits promotion. // A bitcast inhibits promotion.
if (!BC->hasOneUse() || !isa<DbgInfoIntrinsic>(*BC->use_begin())) return false;
return false;
// If the only use is by debug info, this alloca will not exist in
// non-debug code, so don't try to promote; this ensures the same
// codegen with debug info. Otherwise, debug info should not
// inhibit promotion (but we must examine other uses).
if (AI->hasOneUse())
return false;
} else { } else {
return false; return false;
} }
@ -290,15 +283,7 @@ namespace {
for (Value::use_iterator UI = AI->use_begin(), E = AI->use_end(); for (Value::use_iterator UI = AI->use_begin(), E = AI->use_end();
UI != E;) { UI != E;) {
Instruction *User = cast<Instruction>(*UI++); Instruction *User = cast<Instruction>(*UI++);
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;
}
if (StoreInst *SI = dyn_cast<StoreInst>(User)) { if (StoreInst *SI = dyn_cast<StoreInst>(User)) {
// Remember the basic blocks which define new values for the alloca // Remember the basic blocks which define new values for the alloca
DefiningBlocks.push_back(SI->getParent()); DefiningBlocks.push_back(SI->getParent());