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[X86] combineConcatVectorOps - add handling for ISD::SMIN/SMAX/UMIN/UMAX vector ops (#172667)

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Simon Pilgrim 2025-12-17 15:22:26 +00:00 committed by GitHub
parent a452be5007
commit 2fc0d8cb9a
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2 changed files with 11 additions and 9 deletions
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4
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -59632,6 +59632,10 @@ static SDValue combineConcatVectorOps(const SDLoc &DL, MVT VT,
case ISD::ADD:
case ISD::SUB:
case ISD::MUL:
case ISD::SMIN:
case ISD::SMAX:
case ISD::UMIN:
case ISD::UMAX:
// TODO: Add more integer binops?
if (!IsSplat && ((VT.is256BitVector() && Subtarget.hasInt256()) ||
(VT.is512BitVector() && Subtarget.useAVX512Regs() &&

16
llvm/test/CodeGen/X86/combine-icmp.ll
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@ -532,18 +532,16 @@ define i64 @concat_icmp_v64i8_v16i8(<16 x i8> %a0, <16 x i8> %a1, <16 x i8> %a2,
;
; AVX2-LABEL: concat_icmp_v64i8_v16i8:
; AVX2: # %bb.0:
; AVX2-NEXT: vpbroadcastd {{.*#+}} xmm4 = [16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16]
; AVX2-NEXT: vpmaxub %xmm4, %xmm0, %xmm5
; AVX2-NEXT: vpcmpeqb %xmm5, %xmm0, %xmm0
; AVX2-NEXT: vpmaxub %xmm4, %xmm1, %xmm5
; AVX2-NEXT: vpcmpeqb %xmm5, %xmm1, %xmm1
; AVX2-NEXT: vpmaxub %xmm4, %xmm2, %xmm5
; AVX2-NEXT: vpcmpeqb %xmm5, %xmm2, %xmm2
; AVX2-NEXT: vpmaxub %xmm4, %xmm3, %xmm4
; AVX2-NEXT: vpcmpeqb %xmm4, %xmm3, %xmm3
; AVX2-NEXT: # kill: def $xmm2 killed $xmm2 def $ymm2
; AVX2-NEXT: # kill: def $xmm0 killed $xmm0 def $ymm0
; AVX2-NEXT: vinserti128 $1, %xmm1, %ymm0, %ymm0
; AVX2-NEXT: vpbroadcastd {{.*#+}} ymm1 = [16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16]
; AVX2-NEXT: vpmaxub %ymm1, %ymm0, %ymm4
; AVX2-NEXT: vpcmpeqb %ymm4, %ymm0, %ymm0
; AVX2-NEXT: vpmovmskb %ymm0, %ecx
; AVX2-NEXT: vinserti128 $1, %xmm3, %ymm2, %ymm0
; AVX2-NEXT: vpmaxub %ymm1, %ymm0, %ymm1
; AVX2-NEXT: vpcmpeqb %ymm1, %ymm0, %ymm0
; AVX2-NEXT: vpmovmskb %ymm0, %eax
; AVX2-NEXT: shlq $32, %rax
; AVX2-NEXT: orq %rcx, %rax