commit 4011c26cc7cc3762a20d3927fc8cd80ad7b4d893
author Vedant Kumar <vsk@apple.com> Tue Feb 13 01:09:52 2018 +0000
committer Vedant Kumar <vsk@apple.com> Tue Feb 13 01:09:52 2018 +0000
tree 208c0512ccc332adb21472aa66f747d2c2a38699
parent 31ec356a488a364c55782e82691afd1b8f449bc5

[Utils] Salvage debug info of DCE'ed mul/sdiv/srem instructions

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

  63 SALVAGE: MUL
  1250 SALVAGE: SDIV

(No values were salvaged from `srem` instructions in this experiment,
but it's a simple case to handle so we might as well.)

llvm-svn: 324976

llvm/lib/IR/DebugInfoMetadata.cpp

diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index fc3d344..ee3eaae 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -708,6 +708,8 @@
     case dwarf::DW_OP_plus:
     case dwarf::DW_OP_minus:
     case dwarf::DW_OP_mul:
+    case dwarf::DW_OP_div:
+    case dwarf::DW_OP_mod:
     case dwarf::DW_OP_or:
     case dwarf::DW_OP_xor:
     case dwarf::DW_OP_shl: