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Transfer debug location information from PHI nodes to resulting

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lowered copies.

llvm-svn: 103228
This commit is contained in:
Dan Gohman 2010-05-07 01:10:20 +00:00
parent 6650aa28f1
commit 4d75cfcc09
1 changed files with 8 additions and 0 deletions
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8
lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -1082,6 +1082,7 @@ bool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) {
// emitted yet.
for (BasicBlock::const_iterator I = SuccBB->begin();
const PHINode *PN = dyn_cast<PHINode>(I); ++I) {
// Ignore dead phi's.
if (PN->use_empty()) continue;
@ -1104,12 +1105,19 @@ bool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) {
const Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB);
// Set the DebugLoc for the copy. Prefer the location of the operand
// if there is one; use the location of the PHI otherwise.
DL = PN->getDebugLoc();
if (const Instruction *Inst = dyn_cast<Instruction>(PHIOp))
DL = Inst->getDebugLoc();
unsigned Reg = getRegForValue(PHIOp);
if (Reg == 0) {
PHINodesToUpdate.resize(OrigNumPHINodesToUpdate);
return false;
}
PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg));
DL = DebugLoc();
}
}