From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Thu, 9 Jul 2020 16:36:26 +0000 (+0100)
Subject: extractConstantWithoutWrapping - use const APInt& returned by SCEVConstant::getAPInt()
X-Git-Tag: llvmorg-12-init~467
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9a3e8b11a8317b1a3d7440b0585b011cc9527494;p=platform%2Fupstream%2Fllvm.git

extractConstantWithoutWrapping - use const APInt& returned by SCEVConstant::getAPInt()

Avoids unnecessary APInt copies and silences clang tidy warning.
---

diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index 75926aa..48c686b 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -1353,7 +1353,7 @@ bool ScalarEvolution::proveNoWrapByVaryingStart(const SCEV *Start,
 static APInt extractConstantWithoutWrapping(ScalarEvolution &SE,
                                             const SCEVConstant *ConstantTerm,
                                             const SCEVAddExpr *WholeAddExpr) {
-  const APInt C = ConstantTerm->getAPInt();
+  const APInt &C = ConstantTerm->getAPInt();
   const unsigned BitWidth = C.getBitWidth();
   // Find number of trailing zeros of (x + y + ...) w/o the C first:
   uint32_t TZ = BitWidth;