From 4817a7577c1401be92363813d4a00d5a711ce8ab Mon Sep 17 00:00:00 2001
From: Dan Gohman <dan433584@gmail.com>
Date: Mon, 16 May 2016 19:16:32 +0000
Subject: [WebAssembly] Mark COPY_LOCAL and TEE_LOCAL instructions has having
 no side effects.

llvm-svn: 269683
---
 llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td')

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td b/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
index a0ec3698aa5..4b319871cf1 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
@@ -110,6 +110,7 @@ let Defs = [ARGUMENTS] in {
 // get_local and set_local are not generated by instruction selection; they
 // are implied by virtual register uses and defs.
 multiclass LOCAL<WebAssemblyRegClass vt> {
+let hasSideEffects = 0 in {
   // COPY_LOCAL is not an actual instruction in wasm, but since we allow
   // get_local and set_local to be implicit, we can have a COPY_LOCAL which
   // is actually a no-op because all the work is done in the implied
@@ -124,6 +125,7 @@ multiclass LOCAL<WebAssemblyRegClass vt> {
   let isAsCheapAsAMove = 1 in
   def TEE_LOCAL_#vt : I<(outs vt:$res, vt:$also), (ins vt:$src), [],
                         "tee_local\t$res, $also, $src">;
+} // hasSideEffects = 0
 }
 defm : LOCAL<I32>;
 defm : LOCAL<I64>;
-- 
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