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Strip changes to llvm.dbg intrinsics.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26993 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-03-23 18:11:33 +00:00
parent 930ac0606c
commit 4ca9757a39
1 changed files with 34 additions and 7 deletions
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41
lib/Transforms/IPO/StripSymbols.cpp
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@ -96,8 +96,10 @@ bool StripSymbols::runOnModule(Module &M) {
// any globals they point to if now dead.
Function *FuncStart = M.getNamedFunction("llvm.dbg.func.start");
Function *StopPoint = M.getNamedFunction("llvm.dbg.stoppoint");
Function *RegionStart = M.getNamedFunction("llvm.dbg.region.start");
Function *RegionEnd = M.getNamedFunction("llvm.dbg.region.end");
if (!FuncStart && !StopPoint && !RegionEnd)
Function *Declare = M.getNamedFunction("llvm.dbg.declare");
if (!FuncStart && !StopPoint && !RegionStart && !RegionEnd && !Declare)
return true;
std::vector<GlobalVariable*> DeadGlobals;
@ -105,11 +107,10 @@ bool StripSymbols::runOnModule(Module &M) {
// Remove all of the calls to the debugger intrinsics, and remove them from
// the module.
if (FuncStart) {
Value *RV = UndefValue::get(FuncStart->getFunctionType()->getReturnType());
while (!FuncStart->use_empty()) {
CallInst *CI = cast<CallInst>(FuncStart->use_back());
Value *Arg = CI->getOperand(1);
CI->replaceAllUsesWith(RV);
assert(CI->use_empty() && "llvm.dbg intrinsic should have void result");
CI->eraseFromParent();
if (Arg->use_empty())
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Arg))
@ -118,11 +119,10 @@ bool StripSymbols::runOnModule(Module &M) {
FuncStart->eraseFromParent();
}
if (StopPoint) {
Value *RV = UndefValue::get(StopPoint->getFunctionType()->getReturnType());
while (!StopPoint->use_empty()) {
CallInst *CI = cast<CallInst>(StopPoint->use_back());
Value *Arg = CI->getOperand(3);
CI->replaceAllUsesWith(RV);
assert(CI->use_empty() && "llvm.dbg intrinsic should have void result");
CI->eraseFromParent();
if (Arg->use_empty())
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Arg))
@ -130,15 +130,42 @@ bool StripSymbols::runOnModule(Module &M) {
}
StopPoint->eraseFromParent();
}
if (RegionStart) {
while (!RegionStart->use_empty()) {
CallInst *CI = cast<CallInst>(RegionStart->use_back());
Value *Arg = CI->getOperand(1);
assert(CI->use_empty() && "llvm.dbg intrinsic should have void result");
CI->eraseFromParent();
if (Arg->use_empty())
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Arg))
DeadGlobals.push_back(GV);
}
RegionStart->eraseFromParent();
}
if (RegionEnd) {
Value *RV = UndefValue::get(RegionEnd->getFunctionType()->getReturnType());
while (!RegionEnd->use_empty()) {
CallInst *CI = cast<CallInst>(RegionEnd->use_back());
CI->replaceAllUsesWith(RV);
Value *Arg = CI->getOperand(1);
assert(CI->use_empty() && "llvm.dbg intrinsic should have void result");
CI->eraseFromParent();
if (Arg->use_empty())
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Arg))
DeadGlobals.push_back(GV);
}
RegionEnd->eraseFromParent();
}
if (Declare) {
while (!Declare->use_empty()) {
CallInst *CI = cast<CallInst>(Declare->use_back());
Value *Arg = CI->getOperand(2);
assert(CI->use_empty() && "llvm.dbg intrinsic should have void result");
CI->eraseFromParent();
if (Arg->use_empty())
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Arg))
DeadGlobals.push_back(GV);
}
Declare->eraseFromParent();
}
// Finally, delete any internal globals that were only used by the debugger
// intrinsics.