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[X86][AVX] Add HADD lane crossing test 

This used to work before rG77d625f8d8aa, but we now merge the shuffles across the fadd resulting in a hadd that requires a lane crossing post shuffle, which we don't permit on AVX1 targets
This commit is contained in:
Simon Pilgrim 2021-04-07 16:43:36 +01:00
parent 3b460f8cc0
commit 93fb72575f
1 changed files with 27 additions and 0 deletions
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27
llvm/test/CodeGen/X86/vector-shuffle-256-v4.ll
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@ -1817,6 +1817,33 @@ entry:
ret <4 x double> %add
}
define <4 x double> @add_v4f64_024u_135u_reverse(<4 x double> %a, <4 x double> %b) {
; AVX1-LABEL: add_v4f64_024u_135u_reverse:
; AVX1: # %bb.0:
; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm1, %ymm1
; AVX1-NEXT: vshufpd {{.*#+}} ymm2 = ymm0[0],ymm1[1],ymm0[3],ymm1[3]
; AVX1-NEXT: vunpcklpd {{.*#+}} ymm0 = ymm0[0],ymm1[0],ymm0[2],ymm1[2]
; AVX1-NEXT: vaddpd %ymm2, %ymm0, %ymm0
; AVX1-NEXT: retq
;
; AVX2-LABEL: add_v4f64_024u_135u_reverse:
; AVX2: # %bb.0:
; AVX2-NEXT: vhaddpd %ymm0, %ymm1, %ymm0
; AVX2-NEXT: vpermpd {{.*#+}} ymm0 = ymm0[0,0,3,1]
; AVX2-NEXT: retq
;
; AVX512VL-LABEL: add_v4f64_024u_135u_reverse:
; AVX512VL: # %bb.0:
; AVX512VL-NEXT: vhaddpd %ymm0, %ymm1, %ymm0
; AVX512VL-NEXT: vpermpd {{.*#+}} ymm0 = ymm0[0,0,3,1]
; AVX512VL-NEXT: retq
%shuffle0 = shufflevector <4 x double> %a, <4 x double> %b, <4 x i32> <i32 0, i32 2, i32 4, i32 undef>
%shuffle1 = shufflevector <4 x double> %a, <4 x double> %b, <4 x i32> <i32 1, i32 3, i32 5, i32 undef>
%add = fadd <4 x double> %shuffle0, %shuffle1
%shuffle = shufflevector <4 x double> %add, <4 x double> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
ret <4 x double> %shuffle
}
define <4 x i64> @add_v4i64_0246_1357(<4 x i64> %a, <4 x i64> %b) {
; AVX1-LABEL: add_v4i64_0246_1357:
; AVX1: # %bb.0: # %entry