commit 31ec356a488a364c55782e82691afd1b8f449bc5
author Vedant Kumar <vsk@apple.com> Tue Feb 13 01:09:49 2018 +0000
committer Vedant Kumar <vsk@apple.com> Tue Feb 13 01:09:49 2018 +0000
tree a32bae600764f8af2d9edbd8108e647395db7816
parent 47b16c45d7acef402729e67d66aebafe5295af75

[Utils] Salvage debug info of DCE'ed shl/lhsr/ashr instructions

Here are the number of additional debug values salvaged in a stage2
build of clang:

  1912 SALVAGE: ASHR
   405 SALVAGE: LSHR
   249 SALVAGE: SHL

llvm-svn: 324975

llvm/lib/IR/DebugInfoMetadata.cpp

diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index 91b965c..fc3d344 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -710,6 +710,9 @@
     case dwarf::DW_OP_mul:
     case dwarf::DW_OP_or:
     case dwarf::DW_OP_xor:
+    case dwarf::DW_OP_shl:
+    case dwarf::DW_OP_shr:
+    case dwarf::DW_OP_shra:
     case dwarf::DW_OP_deref:
     case dwarf::DW_OP_xderef:
       break;