Transfer debug location information from PHI nodes to resulting
lowered copies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103228 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 2328ed0..6107c8c 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -1082,6 +1082,7 @@
// 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 @@
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();
}
}