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Revert "Debug info for optimized code: Support variables that are on the stack and"

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This reverts commit 207130 for buildbot breakage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207162 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adrian Prantl
2014-04-25 00:04:49 +00:00
parent 45588a02fb
commit ab6ab3c333
10 changed files with 132 additions and 146 deletions
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22
lib/Transforms/Utils/Local.cpp
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@ -1051,26 +1051,20 @@ bool llvm::LowerDbgDeclare(Function &F) {
AllocaInst *AI = dyn_cast_or_null<AllocaInst>(DDI->getAddress());
// If this is an alloca for a scalar variable, insert a dbg.value
// at each load and store to the alloca and erase the dbg.declare.
// The dbg.values allow tracking a variable even if it is not
// stored on the stack, while the dbg.declare can only describe
// the stack slot (and at a lexical-scope granularity). Later
// passes will attempt to elide the stack slot.
if (AI && !AI->isArrayAllocation()) {
// We only remove the dbg.declare intrinsic if all uses are
// converted to dbg.value intrinsics.
bool RemoveDDI = true;
for (User *U : AI->users())
if (StoreInst *SI = dyn_cast<StoreInst>(U))
ConvertDebugDeclareToDebugValue(DDI, SI, DIB);
else if (LoadInst *LI = dyn_cast<LoadInst>(U))
ConvertDebugDeclareToDebugValue(DDI, LI, DIB);
else if (Instruction *I = dyn_cast<Instruction>(U)) {
// This is a call by-value or some other instruction that
// takes a pointer to the variable. Insert a *value*
// intrinsic that describes the alloca.
auto DbgVal =
DIB.insertDbgValueIntrinsic(AI, 0,
DIVariable(DDI->getVariable()), I);
DbgVal->setDebugLoc(I->getDebugLoc());
}
DDI->eraseFromParent();
else
RemoveDDI = false;
if (RemoveDDI)
DDI->eraseFromParent();
}
}
return true;