From d0b5c65b16507d10962d4a4c228b755fdcc6d827 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Wed, 28 Mar 2012 00:21:37 +0000
Subject: [PATCH] Mark flag neverHasSideEffects of pattern-less instructions
 that do not have any side effects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153551 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/MipsInstrInfo.td | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/Target/Mips/MipsInstrInfo.td b/lib/Target/Mips/MipsInstrInfo.td
index bc85fa675d4..96f43313b65 100644
--- a/lib/Target/Mips/MipsInstrInfo.td
+++ b/lib/Target/Mips/MipsInstrInfo.td
@@ -365,6 +365,7 @@ class LoadUpper<bits<6> op, string instr_asm, RegisterClass RC, Operand Imm>:
   FI<op, (outs RC:$rt), (ins Imm:$imm16),
      !strconcat(instr_asm, "\t$rt, $imm16"), [], IIAlu> {
   let rs = 0;
+  let neverHasSideEffects = 1;
 }
 
 class FMem<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern,
@@ -555,6 +556,7 @@ class Mult<bits<6> func, string instr_asm, InstrItinClass itin,
   let shamt = 0;
   let isCommutable = 1;
   let Defs = DefRegs;
+  let neverHasSideEffects = 1;
 }
 
 class Mult32<bits<6> func, string instr_asm, InstrItinClass itin>:
@@ -582,6 +584,7 @@ class MoveFromLOHI<bits<6> func, string instr_asm, RegisterClass RC,
   let rt = 0;
   let shamt = 0;
   let Uses = UseRegs;
+  let neverHasSideEffects = 1;
 }
 
 class MoveToLOHI<bits<6> func, string instr_asm, RegisterClass RC,
@@ -592,6 +595,7 @@ class MoveToLOHI<bits<6> func, string instr_asm, RegisterClass RC,
   let rd = 0;
   let shamt = 0;
   let Defs = DefRegs;
+  let neverHasSideEffects = 1;
 }
 
 class EffectiveAddress<string instr_asm, RegisterClass RC, Operand Mem> :
@@ -635,6 +639,7 @@ class SubwordSwap<bits<6> func, bits<5> sa, string instr_asm, RegisterClass RC>:
   let rs = 0;
   let shamt = sa;
   let Predicates = [HasSwap];
+  let neverHasSideEffects = 1;
 }
 
 // Read Hardware