[X86] Add test coverage for and(ext(and(x, c1)),c2) patterns

This shows the failure to merge to and(ext(x),and(c1,ext(c2))) if the outer and has already been folded to a clear shuffle mask

Similar to the v8i1-masks.ll from regression D127115

Author: RKSimon

llvm/test/CodeGen/X86/combine-and.ll

@@ -385,6 +385,98 @@ define <8 x i16> @and_or_v8i16(<8 x i16> %a0) {
   ret <8 x i16> %2
 }
 
+;
+; TODO: Failure to merge and(ext(and(x,c1)),c2) if one gets folded to a shuffle clear mask
+;
+
+define <8 x i32> @clear_sext_and(<8 x i16> %x) {
+; SSE-LABEL: clear_sext_and:
+; SSE:       # %bb.0:
+; SSE-NEXT:    pand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0
+; SSE-NEXT:    pshufd {{.*#+}} xmm1 = xmm0[2,3,2,3]
+; SSE-NEXT:    pmovsxwd %xmm1, %xmm1
+; SSE-NEXT:    pmovsxwd %xmm0, %xmm0
+; SSE-NEXT:    pxor %xmm2, %xmm2
+; SSE-NEXT:    pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; SSE-NEXT:    pblendw {{.*#+}} xmm1 = xmm2[0,1],xmm1[2,3,4,5,6,7]
+; SSE-NEXT:    retq
+;
+; AVX1-LABEL: clear_sext_and:
+; AVX1:       # %bb.0:
+; AVX1-NEXT:    vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
+; AVX1-NEXT:    vpmovsxwd %xmm0, %xmm1
+; AVX1-NEXT:    vpshufd {{.*#+}} xmm0 = xmm0[2,3,2,3]
+; AVX1-NEXT:    vpmovsxwd %xmm0, %xmm0
+; AVX1-NEXT:    vinsertf128 $1, %xmm0, %ymm1, %ymm0
+; AVX1-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT:    vblendps {{.*#+}} ymm0 = ymm0[0],ymm1[1],ymm0[2],ymm1[3,4],ymm0[5,6,7]
+; AVX1-NEXT:    retq
+;
+; AVX2-LABEL: clear_sext_and:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
+; AVX2-NEXT:    vpmovsxwd %xmm0, %ymm0
+; AVX2-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm0[0],ymm1[1],ymm0[2],ymm1[3,4],ymm0[5,6,7]
+; AVX2-NEXT:    retq
+;
+; AVX512-LABEL: clear_sext_and:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
+; AVX512-NEXT:    vpmovsxwd %xmm0, %ymm0
+; AVX512-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX512-NEXT:    vpblendd {{.*#+}} ymm0 = ymm0[0],ymm1[1],ymm0[2],ymm1[3,4],ymm0[5,6,7]
+; AVX512-NEXT:    retq
+  %1 = and <8 x i16> %x, <i16 -1, i16 3, i16 7, i16 15, i16 31, i16 63, i16 127, i16 -1>
+  %2 = sext <8 x i16> %1 to <8 x i32>
+  %3 = and <8 x i32> %2, <i32 -1, i32 0, i32 -1, i32 0, i32 0, i32 -1, i32 -1, i32 -1>
+  ret <8 x i32> %3
+}
+
+define <8 x i32> @clear_zext_and(<8 x i16> %x) {
+; SSE-LABEL: clear_zext_and:
+; SSE:       # %bb.0:
+; SSE-NEXT:    pand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0
+; SSE-NEXT:    pxor %xmm1, %xmm1
+; SSE-NEXT:    pmovzxwd {{.*#+}} xmm2 = xmm0[0],zero,xmm0[1],zero,xmm0[2],zero,xmm0[3],zero
+; SSE-NEXT:    punpckhwd {{.*#+}} xmm0 = xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
+; SSE-NEXT:    pblendw {{.*#+}} xmm2 = xmm2[0,1],xmm1[2,3],xmm2[4,5],xmm1[6,7]
+; SSE-NEXT:    pblendw {{.*#+}} xmm1 = xmm1[0,1],xmm0[2,3,4,5,6,7]
+; SSE-NEXT:    movdqa %xmm2, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX1-LABEL: clear_zext_and:
+; AVX1:       # %bb.0:
+; AVX1-NEXT:    vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
+; AVX1-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT:    vpunpckhwd {{.*#+}} xmm1 = xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
+; AVX1-NEXT:    vpmovzxwd {{.*#+}} xmm0 = xmm0[0],zero,xmm0[1],zero,xmm0[2],zero,xmm0[3],zero
+; AVX1-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX1-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT:    vblendps {{.*#+}} ymm0 = ymm0[0],ymm1[1],ymm0[2],ymm1[3,4],ymm0[5,6,7]
+; AVX1-NEXT:    retq
+;
+; AVX2-LABEL: clear_zext_and:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
+; AVX2-NEXT:    vpmovzxwd {{.*#+}} ymm0 = xmm0[0],zero,xmm0[1],zero,xmm0[2],zero,xmm0[3],zero,xmm0[4],zero,xmm0[5],zero,xmm0[6],zero,xmm0[7],zero
+; AVX2-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm0[0],ymm1[1],ymm0[2],ymm1[3,4],ymm0[5,6,7]
+; AVX2-NEXT:    retq
+;
+; AVX512-LABEL: clear_zext_and:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
+; AVX512-NEXT:    vpmovzxwd {{.*#+}} ymm0 = xmm0[0],zero,xmm0[1],zero,xmm0[2],zero,xmm0[3],zero,xmm0[4],zero,xmm0[5],zero,xmm0[6],zero,xmm0[7],zero
+; AVX512-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX512-NEXT:    vpblendd {{.*#+}} ymm0 = ymm0[0],ymm1[1],ymm0[2],ymm1[3,4],ymm0[5,6,7]
+; AVX512-NEXT:    retq
+  %1 = and <8 x i16> %x, <i16 -1, i16 3, i16 7, i16 15, i16 31, i16 63, i16 127, i16 -1>
+  %2 = zext <8 x i16> %1 to <8 x i32>
+  %3 = and <8 x i32> %2, <i32 -1, i32 0, i32 -1, i32 0, i32 0, i32 -1, i32 -1, i32 -1>
+  ret <8 x i32> %3
+}
+
 ;
 ; known bits folding
 ;