[SLP] Test for wrongly vectorized set of extractelements, NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315217 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/SLPVectorizer/X86/blending-shuffle.ll b/test/Transforms/SLPVectorizer/X86/blending-shuffle.ll
index 55e479a..22dfffa 100644 (file)
--- a/test/Transforms/SLPVectorizer/X86/blending-shuffle.ll
+++ b/test/Transforms/SLPVectorizer/X86/blending-shuffle.ll
@@ -134,3 +134,33 @@ define i8 @k(<4 x i8> %x) {
   %3 = sdiv i8 %1, %2
   ret i8 %3
 }
+
+define i8 @k_bb(<4 x i8> %x) {
+; CHECK-LABEL: @k_bb(
+; CHECK-NEXT:    br label [[BB1:%.*]]
+; CHECK:       bb1:
+; CHECK-NEXT:    [[TMP1:%.*]] = mul <4 x i8> [[X:%.*]], [[X]]
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i8> [[TMP1]], <4 x i8> undef, <2 x i32> <i32 0, i32 1>
+; CHECK-NEXT:    [[TMP3:%.*]] = mul <4 x i8> [[X]], [[X]]
+; CHECK-NEXT:    [[TMP4:%.*]] = shufflevector <4 x i8> [[TMP3]], <4 x i8> undef, <2 x i32> <i32 3, i32 2>
+; CHECK-NEXT:    [[TMP5:%.*]] = add <2 x i8> [[TMP2]], [[TMP4]]
+; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x i8> [[TMP5]], i32 0
+; CHECK-NEXT:    [[TMP7:%.*]] = extractelement <2 x i8> [[TMP5]], i32 1
+; CHECK-NEXT:    [[TMP8:%.*]] = sdiv i8 [[TMP6]], [[TMP7]]
+; CHECK-NEXT:    ret i8 [[TMP8]]
+;
+  %x0 = extractelement <4 x i8> %x, i32 0
+  br label %bb1
+bb1:
+  %x3 = extractelement <4 x i8> %x, i32 3
+  %x1 = extractelement <4 x i8> %x, i32 1
+  %x2 = extractelement <4 x i8> %x, i32 2
+  %x0x0 = mul i8 %x0, %x0
+  %x3x3 = mul i8 %x3, %x3
+  %x1x1 = mul i8 %x1, %x1
+  %x2x2 = mul i8 %x2, %x2
+  %1 = add i8 %x0x0, %x3x3
+  %2 = add i8 %x1x1, %x2x2
+  %3 = sdiv i8 %1, %2
+  ret i8 %3
+}