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Handle ConstantAggregateZero when upgrading global_ctors.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209075 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2014-05-17 21:00:22 +00:00
parent fbd8cc0926
commit e7a6c2f1df
3 changed files with 12 additions and 6 deletions
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15
lib/IR/AutoUpgrade.cpp
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@ -191,16 +191,19 @@ static bool UpgradeGlobalStructors(GlobalVariable *GV) {
StructType::get(GV->getContext(), Tys, /*isPacked=*/false); StructType::get(GV->getContext(), Tys, /*isPacked=*/false);
// Build new constants with a null third field filled in. // Build new constants with a null third field filled in.
ConstantArray *OldInit = dyn_cast<ConstantArray>(GV->getInitializer()); Constant *OldInitC = GV->getInitializer();
if (!OldInit) ConstantArray *OldInit = dyn_cast<ConstantArray>(OldInitC);
if (!OldInit && !isa<ConstantAggregateZero>(OldInitC))
return false; return false;
std::vector<Constant *> Initializers; std::vector<Constant *> Initializers;
for (Use &U : OldInit->operands()) { if (OldInit) {
ConstantStruct *Init = cast<ConstantStruct>(&U); for (Use &U : OldInit->operands()) {
Constant *NewInit = ConstantStruct *Init = cast<ConstantStruct>(&U);
Constant *NewInit =
ConstantStruct::get(NewTy, Init->getOperand(0), Init->getOperand(1), ConstantStruct::get(NewTy, Init->getOperand(0), Init->getOperand(1),
Constant::getNullValue(VoidPtrTy), nullptr); Constant::getNullValue(VoidPtrTy), nullptr);
Initializers.push_back(NewInit); Initializers.push_back(NewInit);
}
} }
assert(Initializers.size() == ATy->getNumElements()); assert(Initializers.size() == ATy->getNumElements());

3
test/Bitcode/upgrade-global-ctors.ll Normal file
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@ -0,0 +1,3 @@
; RUN: llvm-dis < %s.bc| FileCheck %s
; CHECK: @llvm.global_ctors = appending global [0 x { i32, void ()*, i8* }] zeroinitializer

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test/Bitcode/upgrade-global-ctors.ll.bc Normal file
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