From: Dan Gohman <gohman@apple.com>
Date: Mon, 16 Aug 2010 16:25:35 +0000 (+0000)
Subject: Micro-optimize SCEVConstant comparison.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e28d7922f7a3338b1d0dfec4158584d4dd6f4031;p=oota-llvm.git

Micro-optimize SCEVConstant comparison.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111142 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 73bc8b17276..56777c3adb2 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -590,12 +590,12 @@ namespace {
       // Compare constant values.
       if (const SCEVConstant *LC = dyn_cast<SCEVConstant>(LHS)) {
         const SCEVConstant *RC = cast<SCEVConstant>(RHS);
-        const ConstantInt *LCC = LC->getValue();
-        const ConstantInt *RCC = RC->getValue();
-        unsigned LBitWidth = LCC->getBitWidth(), RBitWidth = RCC->getBitWidth();
+        const APInt &LA = LC->getValue()->getValue();
+        const APInt &RA = RC->getValue()->getValue();
+        unsigned LBitWidth = LA.getBitWidth(), RBitWidth = RA.getBitWidth();
         if (LBitWidth != RBitWidth)
           return LBitWidth < RBitWidth;
-        return LCC->getValue().ult(RCC->getValue());
+        return LA.ult(RA);
       }
 
       // Compare addrec loop depths.