From: NAKAMURA Takumi <geek4civic@gmail.com>
Date: Tue, 4 Feb 2014 06:29:38 +0000 (+0000)
Subject: RegAllocGreedy.cpp: Use more simple value as Hysteresis, to suppress -mfpmath-depende... 
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=1a3b25343f41bbd64e8c61a13e06a7dd6c66d334;p=oota-llvm.git

RegAllocGreedy.cpp: Use more simple value as Hysteresis, to suppress -mfpmath-dependent behavior.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200738 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp
index 50b7553ad16..ca4a941e245 100644
--- a/lib/CodeGen/RegAllocGreedy.cpp
+++ b/lib/CodeGen/RegAllocGreedy.cpp
@@ -311,7 +311,7 @@ const char *const RAGreedy::StageName[] = {
 
 // Hysteresis to use when comparing floats.
 // This helps stabilize decisions based on float comparisons.
-const float Hysteresis = 0.98f;
+const float Hysteresis = (2007 / 2048.0f); // 0.97998046875
 
 
 FunctionPass* llvm::createGreedyRegisterAllocator() {