maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[X86][AVX2] Add SimplifyDemandedVectorElts handling for avx2 per element shifts 

Noticed while investigating how to improve funnel shift codegen
This commit is contained in:
Simon Pilgrim 2022-01-12 14:50:12 +00:00
parent 0c8d30a305
commit de3808c8fc
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -40083,7 +40083,10 @@ bool X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode(
break;
}
case X86ISD::VPSHA:
case X86ISD::VPSHL: {
case X86ISD::VPSHL:
case X86ISD::VSHLV:
case X86ISD::VSRLV:
case X86ISD::VSRAV: {
APInt LHSUndef, LHSZero;
APInt RHSUndef, RHSZero;
SDValue LHS = Op.getOperand(0);

3
llvm/test/CodeGen/X86/combine-avx2-intrinsics.ll
View File

@ -89,7 +89,6 @@ define <8 x i32> @test3_x86_avx2_pblendd_256(<8 x i32> %a0, <8 x i32> %a1) {
define <2 x i64> @demandedelts_vpsllvd(<2 x i64> %a0, <2 x i64> %a1) {
; CHECK-LABEL: demandedelts_vpsllvd:
; CHECK: # %bb.0:
; CHECK-NEXT: vpbroadcastq %xmm0, %xmm0
; CHECK-NEXT: vpsllvq %xmm1, %xmm0, %xmm0
; CHECK-NEXT: vpbroadcastq %xmm0, %xmm0
; CHECK-NEXT: retq
@ -102,7 +101,6 @@ define <2 x i64> @demandedelts_vpsllvd(<2 x i64> %a0, <2 x i64> %a1) {
define <4 x i32> @demandedelts_vpsravd(<4 x i32> %a0, <4 x i32> %a1) {
; CHECK-LABEL: demandedelts_vpsravd:
; CHECK: # %bb.0:
; CHECK-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,1,1]
; CHECK-NEXT: vpsravd %xmm1, %xmm0, %xmm0
; CHECK-NEXT: vpbroadcastd %xmm0, %xmm0
; CHECK-NEXT: retq
@ -115,7 +113,6 @@ define <4 x i32> @demandedelts_vpsravd(<4 x i32> %a0, <4 x i32> %a1) {
define <4 x i64> @demandedelts_vpsrlvq(<4 x i64> %a0, <4 x i64> %a1) {
; CHECK-LABEL: demandedelts_vpsrlvq:
; CHECK: # %bb.0:
; CHECK-NEXT: vpbroadcastq %xmm1, %ymm1
; CHECK-NEXT: vpsrlvq %ymm1, %ymm0, %ymm0
; CHECK-NEXT: vpbroadcastq %xmm0, %ymm0
; CHECK-NEXT: retq