[x86] add tests for PR40243; NFC
llvm-svn: 350646
diff --git a/llvm/test/CodeGen/X86/phaddsub-undef.ll b/llvm/test/CodeGen/X86/phaddsub-undef.ll
index 61f4ab4..a2212ed 100644
--- a/llvm/test/CodeGen/X86/phaddsub-undef.ll
+++ b/llvm/test/CodeGen/X86/phaddsub-undef.ll
@@ -93,6 +93,36 @@
ret <8 x i32> %vecinit5
}
+define <8 x i32> @PR40243_alt(<8 x i32> %a, <8 x i32> %b) {
+; SSE-LABEL: PR40243_alt:
+; SSE: # %bb.0:
+; SSE-NEXT: phaddd %xmm3, %xmm1
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: PR40243_alt:
+; AVX1: # %bb.0:
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: PR40243_alt:
+; AVX2: # %bb.0:
+; AVX2-NEXT: vphaddd %ymm0, %ymm0, %ymm0
+; AVX2-NEXT: retq
+;
+; AVX512-LABEL: PR40243_alt:
+; AVX512: # %bb.0:
+; AVX512-NEXT: vphaddd %ymm0, %ymm0, %ymm0
+; AVX512-NEXT: retq
+ %a4 = extractelement <8 x i32> %a, i32 4
+ %a5 = extractelement <8 x i32> %a, i32 5
+ %add4 = add i32 %a4, %a5
+ %b6 = extractelement <8 x i32> %b, i32 6
+ %b7 = extractelement <8 x i32> %b, i32 7
+ %add7 = add i32 %b6, %b7
+ %r4 = insertelement <8 x i32> undef, i32 %add4, i32 4
+ %r = insertelement <8 x i32> %r4, i32 %add7, i32 7
+ ret <8 x i32> %r
+}
+
define <8 x i32> @test16_undef(<8 x i32> %a, <8 x i32> %b) {
; SSE-LABEL: test16_undef:
; SSE: # %bb.0: