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[X86] Remove some uarch tuning flags from KNL that look to have been inherited from SNB/IVB incorrectly 

KNL is based on a modified Silvermont core so I don't think these features apply. I think the LEA flag is probably also wrong, but I'm less sure as I barely understand the 3 LEA flags we have currently.

Differential Revision: https://reviews.llvm.org/D53671

llvm-svn: 345285
This commit is contained in:
Craig Topper 2018-10-25 17:28:57 +00:00
parent 511c7d0cbe
commit 5d787ac4be
2 changed files with 2 additions and 6 deletions
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4
llvm/lib/Target/X86/X86.td
View File

@ -823,11 +823,7 @@ def KNLFeatures : ProcessorFeatures<[], [
FeatureXSAVEOPT,
FeatureLAHFSAHF,
FeatureSlow3OpsLEA,
FeatureFastScalarFSQRT,
FeatureFastSHLDRotate,
FeatureSlowIncDec,
FeatureMergeToThreeWayBranch,
FeatureMacroFusion,
FeatureRDRAND,
FeatureF16C,
FeatureFSGSBase,

4
llvm/test/CodeGen/X86/avx512-select.ll
View File

@ -16,8 +16,8 @@ define <16 x i32> @select00(i32 %a, <16 x i32> %b) nounwind {
;
; X64-LABEL: select00:
; X64: # %bb.0:
; X64-NEXT: vpxor %xmm1, %xmm1, %xmm1
; X64-NEXT: cmpl $255, %edi
; X64-NEXT: vpxor %xmm1, %xmm1, %xmm1
; X64-NEXT: je .LBB0_2
; X64-NEXT: # %bb.1:
; X64-NEXT: vmovdqa64 %zmm0, %zmm1
@ -44,8 +44,8 @@ define <8 x i64> @select01(i32 %a, <8 x i64> %b) nounwind {
;
; X64-LABEL: select01:
; X64: # %bb.0:
; X64-NEXT: vpxor %xmm1, %xmm1, %xmm1
; X64-NEXT: cmpl $255, %edi
; X64-NEXT: vpxor %xmm1, %xmm1, %xmm1
; X64-NEXT: je .LBB1_2
; X64-NEXT: # %bb.1:
; X64-NEXT: vmovdqa64 %zmm0, %zmm1