From: Fangrui Song <maskray@google.com>
Date: Sat, 15 Jun 2019 10:09:59 +0000 (+0000)
Subject: [BranchProbability] Delete a redundant overflow check
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=dc69eb3bf3d11f065a9f4963f87a1120231c6533;p=llvm

[BranchProbability] Delete a redundant overflow check

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363492 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/BranchProbability.cpp b/lib/Support/BranchProbability.cpp
index bb608da16c1..195e2d58d8e 100644
--- a/lib/Support/BranchProbability.cpp
+++ b/lib/Support/BranchProbability.cpp
@@ -88,10 +88,6 @@ static uint64_t scale(uint64_t Num, uint32_t N, uint32_t D) {
   // Carry.
   Upper32 += Mid32 < Mid32Partial;
 
-  // Check for overflow.
-  if (Upper32 >= D)
-    return UINT64_MAX;
-
   uint64_t Rem = (uint64_t(Upper32) << 32) | Mid32;
   uint64_t UpperQ = Rem / D;