[Utils] Salvage debug info from dead 'or' instructions
Extend salvageDebugInfo to preserve the debug info from a dead 'or'
with a constant.
Patch by Ismail Badawi!
Differential Revision: https://reviews.llvm.org/D43129
llvm-svn: 324764
diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index db097e1..c44bc75 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -706,6 +706,7 @@
case dwarf::DW_OP_plus:
case dwarf::DW_OP_minus:
case dwarf::DW_OP_mul:
+ case dwarf::DW_OP_or:
case dwarf::DW_OP_deref:
case dwarf::DW_OP_xderef:
break;
@@ -772,6 +773,12 @@
if (DerefAfter)
Ops.push_back(dwarf::DW_OP_deref);
+ return doPrepend(Expr, Ops, StackValue);
+}
+
+DIExpression *DIExpression::doPrepend(const DIExpression *Expr,
+ SmallVectorImpl<uint64_t> &Ops,
+ bool StackValue) {
if (Expr)
for (auto Op : Expr->expr_ops()) {
// A DW_OP_stack_value comes at the end, but before a DW_OP_LLVM_fragment.