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Fix a bug in heap-sra that caused compilation failure of office-ispell.

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llvm-svn: 33043
This commit is contained in:
Chris Lattner 2007-01-09 23:29:37 +00:00
parent 7b13c6b655
commit 441127f582
1 changed files with 19 additions and 3 deletions
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22
lib/Transforms/IPO/GlobalOpt.cpp
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@ -1016,9 +1016,25 @@ static GlobalVariable *PerformHeapAllocSRoA(GlobalVariable *GV, MallocInst *MI){
// loads, and all uses of those loads are simple. Rewrite them to use loads
// of the per-field globals instead.
while (!GV->use_empty()) {
LoadInst *LI = cast<LoadInst>(GV->use_back());
RewriteUsesOfLoadForHeapSRoA(LI, FieldGlobals);
LI->eraseFromParent();
if (LoadInst *LI = dyn_cast<LoadInst>(GV->use_back())) {
RewriteUsesOfLoadForHeapSRoA(LI, FieldGlobals);
LI->eraseFromParent();
} else {
// Must be a store of null.
StoreInst *SI = cast<StoreInst>(GV->use_back());
assert(isa<Constant>(SI->getOperand(0)) &&
cast<Constant>(SI->getOperand(0))->isNullValue() &&
"Unexpected heap-sra user!");
// Insert a store of null into each global.
for (unsigned i = 0, e = FieldGlobals.size(); i != e; ++i) {
Constant *Null =
Constant::getNullValue(FieldGlobals[i]->getType()->getElementType());
new StoreInst(Null, FieldGlobals[i], SI);
}
// Erase the original store.
SI->eraseFromParent();
}
}
// The old global is now dead, remove it.