[VectorCombine][X86] Add additional tests for #87510

Add zext nneg tests and check we don't fold casts with different src types

Author: RKSimon

llvm/test/Transforms/VectorCombine/X86/shuffle-of-casts.ll

@@ -17,6 +17,33 @@ define <16 x i32> @concat_zext_v8i16_v16i32(<8 x i16> %a0, <8 x i16> %a1) {
   ret <16 x i32> %r
 }
 
+define <16 x i32> @concat_zext_nneg_v8i8_v16i32(<8 x i8> %a0, <8 x i8> %a1) {
+; CHECK-LABEL: @concat_zext_nneg_v8i8_v16i32(
+; CHECK-NEXT:    [[X0:%.*]] = zext nneg <8 x i8> [[A0:%.*]] to <8 x i32>
+; CHECK-NEXT:    [[X1:%.*]] = zext nneg <8 x i8> [[A1:%.*]] to <8 x i32>
+; CHECK-NEXT:    [[R:%.*]] = shufflevector <8 x i32> [[X0]], <8 x i32> [[X1]], <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
+; CHECK-NEXT:    ret <16 x i32> [[R]]
+;
+  %x0 = zext nneg <8 x i8> %a0 to <8 x i32>
+  %x1 = zext nneg <8 x i8> %a1 to <8 x i32>
+  %r = shufflevector <8 x i32> %x0, <8 x i32> %x1, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
+  ret <16 x i32> %r
+}
+
+; TODO - sext + zext nneg -> sext
+define <8 x i32> @concat_sext_zext_nneg_v4i8_v8i32(<4 x i8> %a0, <4 x i8> %a1) {
+; CHECK-LABEL: @concat_sext_zext_nneg_v4i8_v8i32(
+; CHECK-NEXT:    [[X0:%.*]] = sext <4 x i8> [[A0:%.*]] to <4 x i32>
+; CHECK-NEXT:    [[X1:%.*]] = zext nneg <4 x i8> [[A1:%.*]] to <4 x i32>
+; CHECK-NEXT:    [[R:%.*]] = shufflevector <4 x i32> [[X0]], <4 x i32> [[X1]], <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+; CHECK-NEXT:    ret <8 x i32> [[R]]
+;
+  %x0 = sext <4 x i8> %a0 to <4 x i32>
+  %x1 = zext nneg <4 x i8> %a1 to <4 x i32>
+  %r = shufflevector <4 x i32> %x0, <4 x i32> %x1, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+  ret <8 x i32> %r
+}
+
 define <16 x i32> @concat_sext_v8i16_v16i32(<8 x i16> %a0, <8 x i16> %a1) {
 ; CHECK-LABEL: @concat_sext_v8i16_v16i32(
 ; CHECK-NEXT:    [[X0:%.*]] = sext <8 x i16> [[A0:%.*]] to <8 x i32>
@@ -170,6 +197,21 @@ define <8 x float> @concat_bitcast_v4i32_v8f32(<4 x i32> %a0, <4 x i32> %a1) {
   ret <8 x float> %r
 }
 
+; negative - src type mismatch
+
+define <8 x i32> @concat_sext_v4i8_v4i16_v8i32(<4 x i8> %a0, <4 x i16> %a1) {
+; CHECK-LABEL: @concat_sext_v4i8_v4i16_v8i32(
+; CHECK-NEXT:    [[X0:%.*]] = sext <4 x i8> [[A0:%.*]] to <4 x i32>
+; CHECK-NEXT:    [[X1:%.*]] = sext <4 x i16> [[A1:%.*]] to <4 x i32>
+; CHECK-NEXT:    [[R:%.*]] = shufflevector <4 x i32> [[X0]], <4 x i32> [[X1]], <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+; CHECK-NEXT:    ret <8 x i32> [[R]]
+;
+  %x0 = sext <4 x i8> %a0 to <4 x i32>
+  %x1 = sext <4 x i16> %a1 to <4 x i32>
+  %r = shufflevector <4 x i32> %x0, <4 x i32> %x1, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+  ret <8 x i32> %r
+}
+
 ; negative - castop mismatch
 
 define <16 x i32> @concat_sext_zext_v8i16_v16i32(<8 x i16> %a0, <8 x i16> %a1) {