From 90702f47cf5cd9ef1e9a17c2de48d37a03239d85 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sat, 19 Nov 2022 18:15:08 +0000
Subject: [PATCH] [X86] Remove unnecessary STD + CLD instruction overrides

Reported by D138359
---
 llvm/lib/Target/X86/X86ScheduleZnver1.td | 3 ---
 llvm/lib/Target/X86/X86ScheduleZnver2.td | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/llvm/lib/Target/X86/X86ScheduleZnver1.td b/llvm/lib/Target/X86/X86ScheduleZnver1.td
index f8161a2..8ded509 100644
--- a/llvm/lib/Target/X86/X86ScheduleZnver1.td
+++ b/llvm/lib/Target/X86/X86ScheduleZnver1.td
@@ -712,9 +712,6 @@ def : SchedAlias<WriteBLS, ZnWriteALULat2>;
 // r,m.
 def : SchedAlias<WriteBLSLd, ZnWriteALULat2Ld>;
 
-// CLD STD.
-def : InstRW<[WriteALU], (instrs STD, CLD)>;
-
 // PDEP PEXT.
 // r,r,r.
 def : InstRW<[WriteMicrocoded], (instregex "PDEP(32|64)rr", "PEXT(32|64)rr")>;
diff --git a/llvm/lib/Target/X86/X86ScheduleZnver2.td b/llvm/lib/Target/X86/X86ScheduleZnver2.td
index cc0f0ec..550ec78 100644
--- a/llvm/lib/Target/X86/X86ScheduleZnver2.td
+++ b/llvm/lib/Target/X86/X86ScheduleZnver2.td
@@ -733,9 +733,6 @@ def : SchedAlias<WriteBLS, Zn2WriteALULat2>;
 // r,m.
 def : SchedAlias<WriteBLSLd, Zn2WriteALULat2Ld>;
 
-// CLD STD.
-def : InstRW<[WriteALU], (instrs STD, CLD)>;
-
 // PDEP PEXT.
 // r,r,r.
 def : InstRW<[WriteMicrocoded], (instregex "PDEP(32|64)rr", "PEXT(32|64)rr")>;
-- 
2.7.4