From 5891cf9788423589118d123bdb3972be508c3f02 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Thu, 21 Mar 2013 00:07:17 +0000
Subject: [PATCH] Add a WriteMicrocoded for ancient microcoded instructions.

llvm-svn: 177611
---
 llvm/lib/Target/X86/X86InstrInfo.td | 4 ++++
 llvm/lib/Target/X86/X86Schedule.td  | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/llvm/lib/Target/X86/X86InstrInfo.td b/llvm/lib/Target/X86/X86InstrInfo.td
index f1907e7..39165e2 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.td
+++ b/llvm/lib/Target/X86/X86InstrInfo.td
@@ -1513,6 +1513,7 @@ def CLTS : I<0x06, RawFrm, (outs), (ins), "clts", [], IIC_CLTS>, TB;
 // Table lookup instructions
 def XLAT : I<0xD7, RawFrm, (outs), (ins), "xlatb", [], IIC_XLAT>;
 
+let SchedRW = [WriteMicrocoded] in {
 // ASCII Adjust After Addition
 // sets AL, AH and CF and AF of EFLAGS and uses AL and AF of EFLAGS
 def AAA : I<0x37, RawFrm, (outs), (ins), "aaa", [], IIC_AAA>,
@@ -1542,7 +1543,9 @@ def DAA : I<0x27, RawFrm, (outs), (ins), "daa", [], IIC_DAA>,
 // sets AL, CF and AF of EFLAGS and uses AL, CF and AF of EFLAGS
 def DAS : I<0x2F, RawFrm, (outs), (ins), "das", [], IIC_DAS>,
             Requires<[In32BitMode]>;
+} // SchedRW
 
+let SchedRW = [WriteSystem] in {
 // Check Array Index Against Bounds
 def BOUNDS16rm : I<0x62, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$src),
                    "bound\t{$src, $dst|$dst, $src}", [], IIC_BOUND>, OpSize,
@@ -1558,6 +1561,7 @@ def ARPL16rr : I<0x63, MRMDestReg, (outs GR16:$dst), (ins GR16:$src),
 def ARPL16mr : I<0x63, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src),
                  "arpl\t{$src, $dst|$dst, $src}", [], IIC_ARPL_MEM>,
                  Requires<[In32BitMode]>;
+} // SchedRW
 
 //===----------------------------------------------------------------------===//
 // MOVBE Instructions
diff --git a/llvm/lib/Target/X86/X86Schedule.td b/llvm/lib/Target/X86/X86Schedule.td
index 795a034..bcdd0eb 100644
--- a/llvm/lib/Target/X86/X86Schedule.td
+++ b/llvm/lib/Target/X86/X86Schedule.td
@@ -86,6 +86,9 @@ defm WriteCvtF2F : X86SchedWritePair; // Float -> Float size conversion.
 // Catch-all for expensive system instructions.
 def WriteSystem : SchedWrite;
 
+// Old microcoded instructions that nobody use.
+def WriteMicrocoded : SchedWrite;
+
 //===----------------------------------------------------------------------===//
 // Instruction Itinerary classes used for X86
 def IIC_DEFAULT     : InstrItinClass;
-- 
2.7.4