[llvm] r302404 - [SCEV] Use APInt::operator*=(uint64_t) to avoid a temporary APInt for a constant.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sun May  7 23:55:13 2017
New Revision: 302404

URL: http://llvm.org/viewvc/llvm-project?rev=302404&view=rev
Log:
[SCEV] Use APInt::operator*=(uint64_t) to avoid a temporary APInt for a constant.

Modified:
    llvm/trunk/lib/Analysis/ScalarEvolution.cpp

Modified: llvm/trunk/lib/Analysis/ScalarEvolution.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ScalarEvolution.cpp?rev=302404&r1=302403&r2=302404&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ScalarEvolution.cpp (original)
+++ llvm/trunk/lib/Analysis/ScalarEvolution.cpp Sun May  7 23:55:13 2017
@@ -7376,7 +7376,6 @@ SolveQuadraticEquation(const SCEVAddRecE
   const APInt &M = MC->getAPInt();
   const APInt &N = NC->getAPInt();
   APInt Two(BitWidth, 2);
-  APInt Four(BitWidth, 4);
 
   {
     using namespace APIntOps;
@@ -7392,7 +7391,7 @@ SolveQuadraticEquation(const SCEVAddRecE
     // Compute the B^2-4ac term.
     APInt SqrtTerm(B);
     SqrtTerm *= B;
-    SqrtTerm -= Four * (A * C);
+    SqrtTerm -= 4 * (A * C);
 
     if (SqrtTerm.isNegative()) {
       // The loop is provably infinite.