If the Address of a variable is an argument then treat the entire
variable declaration as an argument because we want that address
anyhow for our debug information.
This seems to fix rdar://9965111, at least we have more debug
information than before and from reading the assembly it appears
to be the correct location.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151335 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 667dca1..048fc6f 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4581,11 +4581,13 @@
N = UnusedArgNodeMap[Address];
SDDbgValue *SDV;
if (N.getNode()) {
- // Parameters are handled specially.
- bool isParameter =
- DIVariable(Variable).getTag() == dwarf::DW_TAG_arg_variable;
if (const BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
Address = BCI->getOperand(0);
+ // Parameters are handled specially.
+ bool isParameter =
+ (DIVariable(Variable).getTag() == dwarf::DW_TAG_arg_variable ||
+ isa<Argument>(Address));
+
const AllocaInst *AI = dyn_cast<AllocaInst>(Address);
if (isParameter && !AI) {
@@ -4606,6 +4608,8 @@
else {
// Can't do anything with other non-AI cases yet.
DEBUG(dbgs() << "Dropping debug info for " << DI << "\n");
+ DEBUG(dbgs() << "non-AllocaInst issue for Address: \n\t");
+ DEBUG(Address->dump());
return 0;
}
DAG.AddDbgValue(SDV, N.getNode(), isParameter);