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Simplify this code by using hasDefinitiveInitializer().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81161 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-09-07 22:31:26 +00:00
parent b73e4aec2e
commit fd54a898be
1 changed files with 10 additions and 9 deletions
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19
lib/Transforms/IPO/GlobalOpt.cpp
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@ -2024,20 +2024,21 @@ static Constant *getVal(DenseMap<Value*, Constant*> &ComputedValues,
/// we punt. We basically just support direct accesses to globals and GEP's of
/// globals. This should be kept up to date with CommitValueTo.
static bool isSimpleEnoughPointerToCommit(Constant *C, LLVMContext &Context) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
if (!GV->hasExternalLinkage() && !GV->hasLocalLinkage())
return false; // do not allow weak/linkonce/dllimport/dllexport linkage.
return !GV->isDeclaration(); // reject external globals.
}
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
// Do not allow weak/linkonce/dllimport/dllexport linkage or
// external globals.
return GV->hasDefinitiveInitializer();
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
// Handle a constantexpr gep.
if (CE->getOpcode() == Instruction::GetElementPtr &&
isa<GlobalVariable>(CE->getOperand(0))) {
GlobalVariable *GV = cast<GlobalVariable>(CE->getOperand(0));
if (!GV->hasExternalLinkage() && !GV->hasLocalLinkage())
return false; // do not allow weak/linkonce/dllimport/dllexport linkage.
return GV->hasInitializer() &&
ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE,
// Do not allow weak/linkonce/dllimport/dllexport linkage or
// external globals.
if (!GV->hasDefinitiveInitializer())
return false;
return ConstantFoldLoadThroughGEPConstantExpr(GV->getInitializer(), CE,
Context);
}
return false;