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

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

llvm-svn: 340432
This commit is contained in:
Vedant Kumar 2018-08-22 18:15:03 +00:00
parent bba94ca910
commit d10dbb804e
2 changed files with 8 additions and 0 deletions
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4
lib/CodeGen/CodeGenPrepare.cpp
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@ -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);

4
test/Transforms/CodeGenPrepare/overflow-intrinsics.ll
View File

@ -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