From b1f64426a00d1d12747f30a9394fdd9db6b9e279 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 16 Oct 2008 06:39:30 +0000
Subject: [PATCH] Simplify overflow-on-add check in
 NumericLiteralParser::GetIntegerValue.

llvm-svn: 57629
---
 clang/lib/Lex/LiteralSupport.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/clang/lib/Lex/LiteralSupport.cpp b/clang/lib/Lex/LiteralSupport.cpp
index f63e6cfffc0d..1b86ba5def85 100644
--- a/clang/lib/Lex/LiteralSupport.cpp
+++ b/clang/lib/Lex/LiteralSupport.cpp
@@ -481,10 +481,9 @@ bool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) {
     Val *= RadixVal;
     OverflowOccurred |= Val.udiv(RadixVal) != OldVal;
 
-    OldVal = Val;
     // Add value, did overflow occur on the value?
+    //   (a + b) ult b  <=> overflow
     Val += CharVal;
-    OverflowOccurred |= Val.ult(OldVal);
     OverflowOccurred |= Val.ult(CharVal);
   }
   return OverflowOccurred;