[PATCH] D38714: [AVX512] Don't mark EXTLOAD as legal with AVX512. Continue using custom lowering.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: test/CodeGen/X86/avx2-vbroadcast.ll:269
 ; X64-AVX512VL:       ## BB#0:
-; X64-AVX512VL-NEXT:    vpmovzxwd {{.*#+}} xmm0 = mem[0],zero,mem[1],zero,mem[2],zero,mem[3],zero
-; X64-AVX512VL-NEXT:    vpshuflw {{.*#+}} xmm0 = xmm0[0,2,2,3,4,5,6,7]
-; X64-AVX512VL-NEXT:    vpshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,4,6,6,7]
-; X64-AVX512VL-NEXT:    vpshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
-; X64-AVX512VL-NEXT:    vpbroadcastq %xmm0, %ymm0
+; X64-AVX512VL-NEXT:    vbroadcastsd (%rdi), %ymm0
 ; X64-AVX512VL-NEXT:    retq
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How come this managed to fold the load but AVX2 didn't?


https://reviews.llvm.org/D38714