From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sun, 20 Nov 2022 13:19:49 +0000 (+0000)
Subject: [X86] Remove unnecessary RDPMC/RDTSC instruction overrides from znver1/znver2 models
X-Git-Tag: upstream/17.0.6~27073
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a6686aae38c599f9e90dc9374fb5b4cb1710b6c6;p=platform%2Fupstream%2Fllvm.git

[X86] Remove unnecessary RDPMC/RDTSC instruction overrides from znver1/znver2 models

Reported by D138359
---

diff --git a/llvm/lib/Target/X86/X86ScheduleZnver1.td b/llvm/lib/Target/X86/X86ScheduleZnver1.td
index bfb68ba..e751637 100644
--- a/llvm/lib/Target/X86/X86ScheduleZnver1.td
+++ b/llvm/lib/Target/X86/X86ScheduleZnver1.td
@@ -755,12 +755,6 @@ def : InstRW<[ZnWriteLEAVE], (instregex "LEAVE")>;
 // PAUSE.
 def : InstRW<[WriteMicrocoded], (instrs PAUSE)>;
 
-// RDTSC.
-def : InstRW<[WriteMicrocoded], (instregex "RDTSC")>;
-
-// RDPMC.
-def : InstRW<[WriteMicrocoded], (instrs RDPMC)>;
-
 // RDRAND.
 def : InstRW<[WriteMicrocoded], (instrs RDRAND16r, RDRAND32r, RDRAND64r)>;
 
diff --git a/llvm/lib/Target/X86/X86ScheduleZnver2.td b/llvm/lib/Target/X86/X86ScheduleZnver2.td
index 0a0243d..c6a0660 100644
--- a/llvm/lib/Target/X86/X86ScheduleZnver2.td
+++ b/llvm/lib/Target/X86/X86ScheduleZnver2.td
@@ -765,12 +765,6 @@ def : InstRW<[Zn2WriteLEAVE], (instregex "LEAVE")>;
 // PAUSE.
 def : InstRW<[WriteMicrocoded], (instrs PAUSE)>;
 
-// RDTSC.
-def : InstRW<[WriteMicrocoded], (instregex "RDTSC")>;
-
-// RDPMC.
-def : InstRW<[WriteMicrocoded], (instrs RDPMC)>;
-
 // RDRAND.
 def : InstRW<[WriteMicrocoded], (instregex "RDRAND(16|32|64)r")>;