[llvm] r340432 - [CodeGenPrepare] Set debug locs when folding a comparison into a uadd.with.overflow

[Vedant Kumar via llvm-commits]

Author: vedantk
Date: Wed Aug 22 11:15:03 2018
New Revision: 340432

URL: http://llvm.org/viewvc/llvm-project?rev=340432&view=rev
Log:
[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.

Modified:
    llvm/trunk/lib/CodeGen/CodeGenPrepare.cpp
    llvm/trunk/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll

Modified: llvm/trunk/lib/CodeGen/CodeGenPrepare.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/CodeGenPrepare.cpp?rev=340432&r1=340431&r2=340432&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/CodeGenPrepare.cpp (original)
+++ llvm/trunk/lib/CodeGen/CodeGenPrepare.cpp Wed Aug 22 11:15:03 2018
@@ -1164,11 +1164,15 @@ static bool CombineUAddWithOverflow(CmpI
 
   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);

Modified: llvm/trunk/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll?rev=340432&r1=340431&r2=340432&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll (original)
+++ llvm/trunk/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll Wed Aug 22 11:15:03 2018
@@ -1,4 +1,5 @@
 ; RUN: opt -codegenprepare -S < %s | FileCheck %s
+; RUN: opt -enable-debugify -codegenprepare -S < %s 2>&1 | FileCheck %s -check-prefix=DEBUG
 
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
 target triple = "x86_64-apple-darwin10.0.0"
@@ -72,3 +73,6 @@ entry:
  exit:
   ret i64 0
 }
+
+; Check that every instruction inserted by -codegenprepare has a debug location.
+; DEBUG: CheckModuleDebugify: PASS