[CodeGenPrepare] Set debug locs when folding a comparison into a uadd.with.overflow

CGP can replace a branch + select with a uadd.with.overflow. Teach it to
set debug locations as it does this.

llvm-svn: 340432

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 37afed449f7..d3cbec736da 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -1164,11 +1164,15 @@ static bool CombineUAddWithOverflow(CmpInst *CI) {
 
   auto *InsertPt = AddI->hasOneUse() ? CI : AddI;
 
+  DebugLoc Loc = CI->getDebugLoc();
   auto *UAddWithOverflow =
       CallInst::Create(F, {A, B}, "uadd.overflow", InsertPt);
+  UAddWithOverflow->setDebugLoc(Loc);
   auto *UAdd = ExtractValueInst::Create(UAddWithOverflow, 0, "uadd", InsertPt);
+  UAdd->setDebugLoc(Loc);
   auto *Overflow =
       ExtractValueInst::Create(UAddWithOverflow, 1, "overflow", InsertPt);
+  Overflow->setDebugLoc(Loc);
 
   CI->replaceAllUsesWith(Overflow);
   AddI->replaceAllUsesWith(UAdd);