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Handle attribute(used) global variables that are i8.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46090 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-01-16 21:35:43 +00:00
parent 48ae02fe62
commit 1e9aa716e9
1 changed files with 13 additions and 14 deletions
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27
lib/Transforms/IPO/StripSymbols.cpp
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@ -101,20 +101,21 @@ bool StripSymbols::runOnModule(Module &M) {
// If we're not just stripping debug info, strip all symbols from the
// functions and the names from any internal globals.
if (!OnlyDebugInfo) {
SmallPtrSet<const Constant *, 8> llvmUsedValues;
Value *LLVMUsed = M.getValueSymbolTable().lookup("llvm.used");
if (LLVMUsed) {
SmallPtrSet<const GlobalValue*, 8> llvmUsedValues;
if (GlobalVariable *LLVMUsed = M.getGlobalVariable("llvm.used")) {
llvmUsedValues.insert(LLVMUsed);
// Collect values that are preserved as per explicit request.
// llvm.used is used to list these values.
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(LLVMUsed)) {
if (ConstantArray *InitList =
dyn_cast<ConstantArray>(GV->getInitializer())) {
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
if (ConstantExpr *CE =
dyn_cast<ConstantExpr>(InitList->getOperand(i)))
if (CE->isCast())
llvmUsedValues.insert(CE->getOperand(0));
}
if (ConstantArray *Inits =
dyn_cast<ConstantArray>(LLVMUsed->getInitializer())) {
for (unsigned i = 0, e = Inits->getNumOperands(); i != e; ++i) {
if (GlobalValue *GV = dyn_cast<GlobalValue>(Inits->getOperand(i)))
llvmUsedValues.insert(GV);
else if (ConstantExpr *CE =
dyn_cast<ConstantExpr>(Inits->getOperand(i)))
if (CE->getOpcode() == Instruction::BitCast)
if (GlobalValue *GV = dyn_cast<GlobalValue>(CE->getOperand(0)))
llvmUsedValues.insert(GV);
}
}
}
@ -123,8 +124,6 @@ bool StripSymbols::runOnModule(Module &M) {
I != E; ++I) {
if (I->hasInternalLinkage() && llvmUsedValues.count(I) == 0)
I->setName(""); // Internal symbols can't participate in linkage
else if (I->getName() == "llvm.used") {
}
}
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {