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Add helper pass to remove llvm.dbg.declare intrinsics.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66454 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-03-09 20:49:37 +00:00
parent f7912df4cb
commit 23e528be80
2 changed files with 69 additions and 2 deletions
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9
include/llvm/Transforms/IPO.h
View File

@ -35,11 +35,16 @@ ModulePass *createStripSymbolsPass(bool OnlyDebugInfo = false);
//===----------------------------------------------------------------------===//
//
// These functions removes symbols from functions and modules.
// Only debugging information is not removed.
// These functions strips symbols from functions and modules.
// Only debugging information is not stripped.
//
ModulePass *createStripNonDebugSymbolsPass();
//===----------------------------------------------------------------------===//
//
// These pass removes llvm.dbg.declare intrinsics.
ModulePass *createStripDebugDeclarePass();
//===----------------------------------------------------------------------===//
/// createLowerSetJmpPass - This function lowers the setjmp/longjmp intrinsics
/// to invoke/unwind instructions. This should really be part of the C/C++

62
lib/Transforms/IPO/StripSymbols.cpp
View File

@ -60,6 +60,19 @@ namespace {
AU.setPreservesAll();
}
};
class VISIBILITY_HIDDEN StripDebugDeclare : public ModulePass {
public:
static char ID; // Pass identification, replacement for typeid
explicit StripDebugDeclare()
: ModulePass(&ID) {}
virtual bool runOnModule(Module &M);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
}
char StripSymbols::ID = 0;
@ -78,6 +91,14 @@ ModulePass *llvm::createStripNonDebugSymbolsPass() {
return new StripNonDebugSymbols();
}
char StripDebugDeclare::ID = 0;
static RegisterPass<StripDebugDeclare>
Z("strip-debug-declare", "Strip all llvm.dbg.declare intrinsics");
ModulePass *llvm::createStripDebugDeclarePass() {
return new StripDebugDeclare();
}
/// OnlyUsedBy - Return true if V is only used by Usr.
static bool OnlyUsedBy(Value *V, Value *Usr) {
for(Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
@ -343,3 +364,44 @@ bool StripSymbols::runOnModule(Module &M) {
bool StripNonDebugSymbols::runOnModule(Module &M) {
return StripSymbolNames(M, true);
}
bool StripDebugDeclare::runOnModule(Module &M) {
Function *Declare = M.getFunction("llvm.dbg.declare");
if (!Declare)
return false;
std::vector<Constant*> DeadConstants;
while (!Declare->use_empty()) {
CallInst *CI = cast<CallInst>(Declare->use_back());
Value *Arg1 = CI->getOperand(1);
Value *Arg2 = CI->getOperand(2);
assert(CI->use_empty() && "llvm.dbg intrinsic should have void result");
CI->eraseFromParent();
if (Arg1->use_empty()) {
if (Constant *C = dyn_cast<Constant>(Arg1))
DeadConstants.push_back(C);
else
RecursivelyDeleteTriviallyDeadInstructions(Arg1, NULL);
}
if (Arg2->use_empty())
if (Constant *C = dyn_cast<Constant>(Arg2))
DeadConstants.push_back(C);
}
Declare->eraseFromParent();
while (!DeadConstants.empty()) {
Constant *C = DeadConstants.back();
DeadConstants.pop_back();
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
if (GV->hasLocalLinkage())
RemoveDeadConstant(GV);
}
else
RemoveDeadConstant(C);
}
return true;
}