From 37cb8398c8d5043f395a6c76d7591301b2efe196 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Wed, 26 Dec 2012 21:30:22 +0000
Subject: [PATCH] Mark all the _REV instructions as not having side effects.
 They aren't really emitted by the backend, but it reduces the number of
 instructions in the output files with unmodelled side effects to make
 auditing easier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171118 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86InstrArithmetic.td |  1 +
 lib/Target/X86/X86InstrFMA.td        |  4 ++--
 lib/Target/X86/X86InstrInfo.td       |  2 +-
 lib/Target/X86/X86InstrSSE.td        | 12 ++++++------
 4 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/lib/Target/X86/X86InstrArithmetic.td b/lib/Target/X86/X86InstrArithmetic.td
index 478c42d6575..874b9aae09e 100644
--- a/lib/Target/X86/X86InstrArithmetic.td
+++ b/lib/Target/X86/X86InstrArithmetic.td
@@ -690,6 +690,7 @@ class BinOpRR_Rev<bits<8> opcode, string mnemonic, X86TypeInfo typeinfo>
         mnemonic, "{$src2, $dst|$dst, $src2}", [], IIC_BIN_NONMEM> {
   // The disassembler should know about this, but not the asmparser.
   let isCodeGenOnly = 1;
+  let hasSideEffects = 0;
 }
 
 // BinOpRR_F_Rev - Instructions like "cmp reg, reg" (reversed encoding).
diff --git a/lib/Target/X86/X86InstrFMA.td b/lib/Target/X86/X86InstrFMA.td
index d360a73b346..f48f133b12f 100644
--- a/lib/Target/X86/X86InstrFMA.td
+++ b/lib/Target/X86/X86InstrFMA.td
@@ -220,7 +220,7 @@ multiclass fma4s<bits<8> opc, string OpcodeStr, RegisterClass RC,
            [(set RC:$dst,
              (OpNode RC:$src1, (mem_frag addr:$src2), RC:$src3))]>;
 // For disassembler
-let isCodeGenOnly = 1 in
+let isCodeGenOnly = 1, hasSideEffects = 0 in
   def rr_REV : FMA4<opc, MRMSrcReg, (outs RC:$dst),
                (ins RC:$src1, RC:$src2, RC:$src3),
                !strconcat(OpcodeStr,
@@ -294,7 +294,7 @@ multiclass fma4p<bits<8> opc, string OpcodeStr, SDNode OpNode,
            [(set VR256:$dst, (OpNode VR256:$src1,
                               (ld_frag256 addr:$src2), VR256:$src3))]>, VEX_L;
 // For disassembler
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
   def rr_REV : FMA4<opc, MRMSrcReg, (outs VR128:$dst),
                (ins VR128:$src1, VR128:$src2, VR128:$src3),
                !strconcat(OpcodeStr,
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index cf7acfb81df..2301b2327c7 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -1043,7 +1043,7 @@ def MOV64ao64 : RIi32<0xA3, RawFrm, (outs offset64:$dst), (ins),
 */
 
 
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
 def MOV8rr_REV : I<0x8A, MRMSrcReg, (outs GR8:$dst), (ins GR8:$src),
                    "mov{b}\t{$src, $dst|$dst, $src}", [], IIC_MOV>;
 def MOV16rr_REV : I<0x8B, MRMSrcReg, (outs GR16:$dst), (ins GR16:$src),
diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 885fa1a5951..70d1de55a01 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -480,7 +480,7 @@ def VMOVSDrr : sse12_move_rr<FR64, X86Movsd, v2f64,
                 VEX_LIG;
 
 // For the disassembler
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
   def VMOVSSrr_REV : SI<0x11, MRMDestReg, (outs VR128:$dst),
                         (ins VR128:$src1, FR32:$src2),
                         "movss\t{$src2, $src1, $dst|$dst, $src1, $src2}", [],
@@ -518,7 +518,7 @@ let Constraints = "$src1 = $dst" in {
                           "movsd\t{$src2, $dst|$dst, $src2}">, XD;
 
   // For the disassembler
-  let isCodeGenOnly = 1 in {
+  let isCodeGenOnly = 1, hasSideEffects = 0 in {
     def MOVSSrr_REV : SI<0x11, MRMDestReg, (outs VR128:$dst),
                          (ins VR128:$src1, FR32:$src2),
                          "movss\t{$src2, $dst|$dst, $src2}", [],
@@ -869,7 +869,7 @@ def VMOVUPDYmr : VPDI<0x11, MRMDestMem, (outs), (ins f256mem:$dst, VR256:$src),
                    IIC_SSE_MOVU_P_MR>, VEX, VEX_L;
 
 // For disassembler
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
   def VMOVAPSrr_REV : VPSI<0x29, MRMDestReg, (outs VR128:$dst),
                           (ins VR128:$src),
                           "movaps\t{$src, $dst|$dst, $src}", [],
@@ -943,7 +943,7 @@ def MOVUPDmr : PDI<0x11, MRMDestMem, (outs), (ins f128mem:$dst, VR128:$src),
                    IIC_SSE_MOVU_P_MR>;
 
 // For disassembler
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
   def MOVAPSrr_REV : PSI<0x29, MRMDestReg, (outs VR128:$dst), (ins VR128:$src),
                          "movaps\t{$src, $dst|$dst, $src}", [],
                          IIC_SSE_MOVA_P_RR>;
@@ -3485,7 +3485,7 @@ def VMOVDQUYrr : VSSI<0x6F, MRMSrcReg, (outs VR256:$dst), (ins VR256:$src),
 }
 
 // For Disassembler
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
 def VMOVDQArr_REV  : VPDI<0x7F, MRMDestReg, (outs VR128:$dst), (ins VR128:$src),
                         "movdqa\t{$src, $dst|$dst, $src}", [],
                         IIC_SSE_MOVA_P_RR>,
@@ -3548,7 +3548,7 @@ def MOVDQUrr :   I<0x6F, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
                    [], IIC_SSE_MOVU_P_RR>, XS, Requires<[UseSSE2]>;
 
 // For Disassembler
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
 def MOVDQArr_REV : PDI<0x7F, MRMDestReg, (outs VR128:$dst), (ins VR128:$src),
                        "movdqa\t{$src, $dst|$dst, $src}", [],
                        IIC_SSE_MOVA_P_RR>;
-- 
2.34.1