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[X86] When lowering truncates to vXi1, don't sign extend i16/i8 types to 512-bit if we have VLX. 

This should only affect what we do for v8i16. Previously we went to v8i64, but if we have VLX we only need v8i32. This prevents an unnecessary zmm usage.

llvm-svn: 321303
This commit is contained in:
Craig Topper 2017-12-21 20:45:13 +00:00
parent df898cc5ed
commit 742ac98d01
4 changed files with 23 additions and 22 deletions
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3
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -16449,7 +16449,8 @@ static SDValue LowerTruncateVecI1(SDValue Op, SelectionDAG &DAG,
assert((InVT.is256BitVector() || InVT.is128BitVector()) &&
"Unexpected vector type.");
unsigned NumElts = InVT.getVectorNumElements();
MVT ExtVT = MVT::getVectorVT(MVT::getIntegerVT(512/NumElts), NumElts);
MVT EltVT = Subtarget.hasVLX() ? MVT::i32 : MVT::getIntegerVT(512/NumElts);
MVT ExtVT = MVT::getVectorVT(EltVT, NumElts);
In = DAG.getNode(ISD::SIGN_EXTEND, DL, ExtVT, In);
InVT = ExtVT;
ShiftInx = InVT.getScalarSizeInBits() - 1;

24
llvm/test/CodeGen/X86/bitcast-and-setcc-128.ll
View File

@ -30,13 +30,13 @@ define i8 @v8i16(<8 x i16> %a, <8 x i16> %b, <8 x i16> %c, <8 x i16> %d) {
; AVX512F-LABEL: v8i16:
; AVX512F: # %bb.0:
; AVX512F-NEXT: vpcmpgtw %xmm1, %xmm0, %xmm0
; AVX512F-NEXT: vpmovsxwq %xmm0, %zmm0
; AVX512F-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512F-NEXT: vptestmq %zmm0, %zmm0, %k1
; AVX512F-NEXT: vpmovsxwd %xmm0, %ymm0
; AVX512F-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512F-NEXT: vptestmd %ymm0, %ymm0, %k1
; AVX512F-NEXT: vpcmpgtw %xmm3, %xmm2, %xmm0
; AVX512F-NEXT: vpmovsxwq %xmm0, %zmm0
; AVX512F-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512F-NEXT: vptestmq %zmm0, %zmm0, %k0 {%k1}
; AVX512F-NEXT: vpmovsxwd %xmm0, %ymm0
; AVX512F-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512F-NEXT: vptestmd %ymm0, %ymm0, %k0 {%k1}
; AVX512F-NEXT: kmovw %k0, %eax
; AVX512F-NEXT: # kill: def %al killed %al killed %eax
; AVX512F-NEXT: vzeroupper
@ -943,12 +943,12 @@ define i8 @v8i8(<8 x i8> %a, <8 x i8> %b, <8 x i8> %c, <8 x i8> %d) {
; AVX512F-NEXT: vpsllw $8, %xmm0, %xmm0
; AVX512F-NEXT: vpsraw $8, %xmm0, %xmm0
; AVX512F-NEXT: vpcmpgtw %xmm1, %xmm0, %xmm0
; AVX512F-NEXT: vpmovsxwq %xmm0, %zmm0
; AVX512F-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512F-NEXT: vptestmq %zmm0, %zmm0, %k1
; AVX512F-NEXT: vpmovsxwq %xmm2, %zmm0
; AVX512F-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512F-NEXT: vptestmq %zmm0, %zmm0, %k0 {%k1}
; AVX512F-NEXT: vpmovsxwd %xmm0, %ymm0
; AVX512F-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512F-NEXT: vptestmd %ymm0, %ymm0, %k1
; AVX512F-NEXT: vpmovsxwd %xmm2, %ymm0
; AVX512F-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512F-NEXT: vptestmd %ymm0, %ymm0, %k0 {%k1}
; AVX512F-NEXT: kmovw %k0, %eax
; AVX512F-NEXT: # kill: def %al killed %al killed %eax
; AVX512F-NEXT: vzeroupper

12
llvm/test/CodeGen/X86/bitcast-setcc-128.ll
View File

@ -26,9 +26,9 @@ define i8 @v8i16(<8 x i16> %a, <8 x i16> %b) {
; AVX512F-LABEL: v8i16:
; AVX512F: # %bb.0:
; AVX512F-NEXT: vpcmpgtw %xmm1, %xmm0, %xmm0
; AVX512F-NEXT: vpmovsxwq %xmm0, %zmm0
; AVX512F-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512F-NEXT: vptestmq %zmm0, %zmm0, %k0
; AVX512F-NEXT: vpmovsxwd %xmm0, %ymm0
; AVX512F-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512F-NEXT: vptestmd %ymm0, %ymm0, %k0
; AVX512F-NEXT: kmovw %k0, %eax
; AVX512F-NEXT: # kill: def %al killed %al killed %eax
; AVX512F-NEXT: vzeroupper
@ -640,9 +640,9 @@ define i8 @v8i8(<8 x i8> %a, <8 x i8> %b) {
; AVX512F-NEXT: vpsllw $8, %xmm0, %xmm0
; AVX512F-NEXT: vpsraw $8, %xmm0, %xmm0
; AVX512F-NEXT: vpcmpgtw %xmm1, %xmm0, %xmm0
; AVX512F-NEXT: vpmovsxwq %xmm0, %zmm0
; AVX512F-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512F-NEXT: vptestmq %zmm0, %zmm0, %k0
; AVX512F-NEXT: vpmovsxwd %xmm0, %ymm0
; AVX512F-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512F-NEXT: vptestmd %ymm0, %ymm0, %k0
; AVX512F-NEXT: kmovw %k0, %eax
; AVX512F-NEXT: # kill: def %al killed %al killed %eax
; AVX512F-NEXT: vzeroupper

6
llvm/test/CodeGen/X86/vector-shuffle-v1.ll
View File

@ -537,9 +537,9 @@ define i8 @shuf8i1_9_6_1_10_3_7_7_0_all_ones(<8 x i1> %a) {
;
; AVX512VL-LABEL: shuf8i1_9_6_1_10_3_7_7_0_all_ones:
; AVX512VL: # %bb.0:
; AVX512VL-NEXT: vpmovsxwq %xmm0, %zmm0
; AVX512VL-NEXT: vpsllq $63, %zmm0, %zmm0
; AVX512VL-NEXT: vptestmq %zmm0, %zmm0, %k1
; AVX512VL-NEXT: vpmovsxwd %xmm0, %ymm0
; AVX512VL-NEXT: vpslld $31, %ymm0, %ymm0
; AVX512VL-NEXT: vptestmd %ymm0, %ymm0, %k1
; AVX512VL-NEXT: vpcmpeqd %ymm0, %ymm0, %ymm0
; AVX512VL-NEXT: vmovdqa32 %ymm0, %ymm1 {%k1} {z}
; AVX512VL-NEXT: vpshufd {{.*#+}} xmm1 = xmm1[1,1,2,3]