[PATCH] D57336: [DAGCombiner] fold extract_subvector of extract_subvector

[Sanjay Patel via Phabricator via llvm-commits]

spatel marked an inline comment as done.
spatel added inline comments.


================
Comment at: test/CodeGen/X86/avx512-shuffles/partial_permute.ll:3806-3815
 define <4 x double> @test_8xdouble_to_4xdouble_perm_mask3(<8 x double> %vec) {
 ; CHECK-LABEL: test_8xdouble_to_4xdouble_perm_mask3:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vextractf64x4 $1, %zmm0, %ymm2
-; CHECK-NEXT:    vmovapd {{.*#+}} ymm1 = [0,2,1,4]
+; CHECK-NEXT:    vextractf32x4 $2, %zmm0, %xmm1
+; CHECK-NEXT:    vbroadcastsd %xmm1, %ymm2
+; CHECK-NEXT:    vmovapd {{.*#+}} ymm1 = [0,2,1,7]
 ; CHECK-NEXT:    vpermi2pd %ymm2, %ymm0, %ymm1
----------------
See:
https://bugs.llvm.org/show_bug.cgi?id=40500


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57336/new/

https://reviews.llvm.org/D57336