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[X86] Remove FeatureRTM from Skylake processor list

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Summary:
There are a LOT of Skylakes and later without TSX-NI. Examples:
- SKL: https://ark.intel.com/products/136863/Intel-Core-i3-8121U-Processor-4M-Cache-up-to-3-20-GHz-
- KBL: https://ark.intel.com/products/97540/Intel-Core-i7-7560U-Processor-4M-Cache-up-to-3-80-GHz-
- KBL-R: https://ark.intel.com/products/149091/Intel-Core-i7-8565U-Processor-8M-Cache-up-to-4-60-GHz-
- CNL: https://ark.intel.com/products/136863/Intel-Core-i3-8121U-Processor-4M-Cache-up-to-3_20-GHz

This feature seems to be present only on high-end desktop and server
chips (I can't find any SKX without). This commit leaves it disabled
for all processors, but can be re-enabled for specific builds with
-mrtm.

Patch by Thiago Macieira

Reviewers: erichkeane, craig.topper

Reviewed By: craig.topper

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D53041

llvm-svn: 344116
This commit is contained in:
Craig Topper 2018-10-10 07:43:35 +00:00
parent 1ed2d5f64f
commit 90a3c6f55a
2 changed files with 6 additions and 7 deletions
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1
lib/Target/X86/X86.td
View File

@ -801,7 +801,6 @@ def : BroadwellProc<"broadwell">;
def SKLFeatures : ProcessorFeatures<BDWFeatures.Value, [
FeatureAES,
FeatureMPX,
FeatureRTM,
FeatureXSAVEC,
FeatureXSAVES,
FeatureCLFLUSHOPT,

12
test/CodeGen/X86/rtm-schedule.ll
View File

@ -1,10 +1,10 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mcpu=x86-64 -mattr=+rtm | FileCheck %s --check-prefix=CHECK --check-prefix=GENERIC
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mcpu=skylake | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=SKL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mcpu=skx | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=SKX
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mcpu=cannonlake | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=CNL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mcpu=icelake-client | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=ICL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mcpu=icelake-server | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=ICL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mattr=+rtm -mcpu=x86-64 -mattr=+rtm | FileCheck %s --check-prefix=CHECK --check-prefix=GENERIC
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mattr=+rtm -mcpu=skylake | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=SKL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mattr=+rtm -mcpu=skx | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=SKX
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mattr=+rtm -mcpu=cannonlake | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=CNL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mattr=+rtm -mcpu=icelake-client | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=ICL
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -print-schedule -mattr=+rtm -mcpu=icelake-server | FileCheck %s --check-prefix=CHECK --check-prefix=SKYLAKE --check-prefix=ICL
define i32 @test_xbegin() nounwind uwtable {
; GENERIC-LABEL: test_xbegin: