From: Florian Hahn <flo@fhahn.com>
Date: Sat, 13 Nov 2021 09:39:14 +0000 (+0000)
Subject: [SCEV] Update SCEVLoopGuardRewriter to hold reference to map. (NFC)
X-Git-Tag: upstream/15.0.7~25816
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8ed8d370880b5c4e7bbf52b50791710a9f4f834b;p=platform%2Fupstream%2Fllvm.git

[SCEV] Update SCEVLoopGuardRewriter to hold reference to map. (NFC)

SCEVLoopGuardRewriter doesn't need to copy the rewrite map. It can just
hold a const reference instead, to avoid an unnecessary copy.
---

diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index d7effde..5bdbe40 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -13696,7 +13696,7 @@ ScalarEvolution::computeSymbolicMaxBackedgeTakenCount(const Loop *L) {
 ///
 /// At the moment only rewriting SCEVUnknown is supported.
 class SCEVLoopGuardRewriter : public SCEVRewriteVisitor<SCEVLoopGuardRewriter> {
-  DenseMap<const SCEV *, const SCEV *> Map;
+  const DenseMap<const SCEV *, const SCEV *> &Map;
 
 public:
   SCEVLoopGuardRewriter(ScalarEvolution &SE,