From: Alex Shlyapnikov <alekseys@google.com>
Date: Wed, 12 Apr 2017 20:51:42 +0000 (+0000)
Subject: Avoid calling SizeClassMap::MaxCachedHint on hot path, it's not free.
X-Git-Tag: llvmorg-5.0.0-rc1~7901
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=05bf27ac3f560cc798b20a352450d3b6bc20e72b;p=platform%2Fupstream%2Fllvm.git

Avoid calling SizeClassMap::MaxCachedHint on hot path, it's not free.

Summary: Remove unecessary SizeClassMap::MaxCachedHint call.

Reviewers: eugenis

Subscribers: llvm-commits, kubamracek

Differential Revision: https://reviews.llvm.org/D31989

llvm-svn: 300103
---

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_allocator_local_cache.h b/compiler-rt/lib/sanitizer_common/sanitizer_allocator_local_cache.h
index e1172e0..a366194 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_allocator_local_cache.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_allocator_local_cache.h
@@ -102,7 +102,7 @@ struct SizeClassAllocator64LocalCache {
   NOINLINE void Refill(PerClass *c, SizeClassAllocator *allocator,
                        uptr class_id) {
     InitCache();
-    uptr num_requested_chunks = SizeClassMap::MaxCachedHint(class_id);
+    uptr num_requested_chunks = c->max_count / 2;
     allocator->GetFromAllocator(&stats_, class_id, c->chunks,
                                 num_requested_chunks);
     c->count = num_requested_chunks;