From da26b84bd0cf996badc6c1c876f5a363158ca8d4 Mon Sep 17 00:00:00 2001
From: Thomas Lively <tlively@google.com>
Date: Thu, 23 Aug 2018 19:23:13 +0000
Subject: [WebAssembly] Prioritize splats over v128.consts

Summary:
Splats are fewer bytes than v128.consts, so use them when either could
apply.

Reviewers: aheejin, dschuff

Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D51179

llvm-svn: 340569
---
 llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td | 2 ++
 1 file changed, 2 insertions(+)

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

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td b/llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td
index 07d3dbc8abb..2ea5c8d97a0 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td
@@ -85,6 +85,8 @@ def splat16 : PatFrag<(ops node:$x), (build_vector
                         node:$x, node:$x, node:$x, node:$x)>;
 multiclass Splat<ValueType vec_t, string vec, WebAssemblyRegClass reg_t,
                  PatFrag splat_pat, bits<32> simdop> {
+  // Prefer splats over v128.const for const splats (65 is lowest that works)
+  let AddedComplexity = 65 in
   defm SPLAT_#vec_t : SIMD_I<(outs V128:$dst), (ins reg_t:$x), (outs), (ins),
                              [(set (vec_t V128:$dst), (splat_pat reg_t:$x))],
                              vec#".splat\t$dst, $x", vec#".splat", simdop>;
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