r325655 - [X86] Disable CLWB in Cannon Lake
Craig Topper via cfe-commits
cfe-commits at lists.llvm.org
Tue Feb 20 16:16:50 PST 2018
Author: ctopper
Date: Tue Feb 20 16:16:50 2018
New Revision: 325655
URL: http://llvm.org/viewvc/llvm-project?rev=325655&view=rev
Log:
[X86] Disable CLWB in Cannon Lake
Cannon Lake does not support CLWB, therefore it
does not include all features listed under SKX.
Patch by Gabor Buella
Differential Revision: https://reviews.llvm.org/D43459
Modified:
cfe/trunk/lib/Basic/Targets/X86.cpp
cfe/trunk/test/Preprocessor/predefined-arch-macros.c
Modified: cfe/trunk/lib/Basic/Targets/X86.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets/X86.cpp?rev=325655&r1=325654&r2=325655&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets/X86.cpp (original)
+++ cfe/trunk/lib/Basic/Targets/X86.cpp Tue Feb 20 16:16:50 2018
@@ -175,7 +175,8 @@ bool X86TargetInfo::initFeatureMap(
setFeatureEnabledImpl(Features, "avx512bw", true);
setFeatureEnabledImpl(Features, "avx512vl", true);
setFeatureEnabledImpl(Features, "pku", true);
- setFeatureEnabledImpl(Features, "clwb", true);
+ if (Kind != CK_Cannonlake) // CNL inherits all SKX features, except CLWB
+ setFeatureEnabledImpl(Features, "clwb", true);
LLVM_FALLTHROUGH;
case CK_SkylakeClient:
setFeatureEnabledImpl(Features, "xsavec", true);
Modified: cfe/trunk/test/Preprocessor/predefined-arch-macros.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Preprocessor/predefined-arch-macros.c?rev=325655&r1=325654&r2=325655&view=diff
==============================================================================
--- cfe/trunk/test/Preprocessor/predefined-arch-macros.c (original)
+++ cfe/trunk/test/Preprocessor/predefined-arch-macros.c Tue Feb 20 16:16:50 2018
@@ -974,7 +974,7 @@
// CHECK_CNL_M32: #define __BMI2__ 1
// CHECK_CNL_M32: #define __BMI__ 1
// CHECK_CNL_M32: #define __CLFLUSHOPT__ 1
-// CHECK_CNL_M32: #define __CLWB__ 1
+// CHECK_CNL_M32-NOT: #define __CLWB__ 1
// CHECK_CNL_M32: #define __F16C__ 1
// CHECK_CNL_M32: #define __FMA__ 1
// CHECK_CNL_M32: #define __LZCNT__ 1
@@ -1022,7 +1022,7 @@
// CHECK_CNL_M64: #define __BMI2__ 1
// CHECK_CNL_M64: #define __BMI__ 1
// CHECK_CNL_M64: #define __CLFLUSHOPT__ 1
-// CHECK_CNL_M64: #define __CLWB__ 1
+// CHECK_CNL_M64-NOT: #define __CLWB__ 1
// CHECK_CNL_M64: #define __F16C__ 1
// CHECK_CNL_M64: #define __FMA__ 1
// CHECK_CNL_M64: #define __LZCNT__ 1
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