From d99af23765a99ef2461d06b74448d6e54dd7e573 Mon Sep 17 00:00:00 2001
From: Thomas Lively <tlively@google.com>
Date: Tue, 5 Feb 2019 00:49:55 +0000
Subject: [WebAssembly] memory.copy

Summary: Depends on D57495.

Reviewers: aheejin, dschuff

Subscribers: sbc100, jgravelle-google, hiraditya, sunfish

Differential Revision: https://reviews.llvm.org/D57498

llvm-svn: 353127
---
 llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp')

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index d0543925a83..b17c7fae043 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -243,6 +243,12 @@ WebAssemblyTargetLowering::WebAssemblyTargetLowering(
   setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);
 
   setMaxAtomicSizeInBitsSupported(64);
+
+  if (Subtarget->hasBulkMemory()) {
+    // Using memory.copy is always better than using multiple loads and stores
+    MaxStoresPerMemcpy = 1;
+    MaxStoresPerMemcpyOptSize = 1;
+  }
 }
 
 TargetLowering::AtomicExpansionKind
-- 
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