-; RUN: llvm-as < %s | opt -instcombine -disable-output &&
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep vector_shuffle
+; RUN: opt < %s -instcombine -S | FileCheck %s
-%T = type <4 x float>
+define <4 x float> @test1(<4 x float> %v1) {
+; CHECK: @test1
+; CHECK: ret <4 x float> %v1
+ %v2 = shufflevector <4 x float> %v1, <4 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ ret <4 x float> %v2
+}
-implementation
+define <4 x float> @test2(<4 x float> %v1) {
+; CHECK: @test2
+; CHECK: ret <4 x float> %v1
+ %v2 = shufflevector <4 x float> %v1, <4 x float> %v1, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ ret <4 x float> %v2
+}
-%T %test1(%T %v1) {
- %v2 = shufflevector %T %v1, %T undef, <4 x uint> <uint 0, uint 1, uint 2, uint 3>
- ret %T %v2
+define float @test3(<4 x float> %A, <4 x float> %B, float %f) {
+; CHECK: @test3
+; CHECK: ret float %f
+ %C = insertelement <4 x float> %A, float %f, i32 0
+ %D = shufflevector <4 x float> %C, <4 x float> %B, <4 x i32> <i32 5, i32 0, i32 2, i32 7>
+ %E = extractelement <4 x float> %D, i32 1
+ ret float %E
}
-%T %test2(%T %v1) {
- %v2 = shufflevector %T %v1, %T %v1, <4 x uint> <uint 0, uint 5, uint 2, uint 7>
- ret %T %v2
+define i32 @test4(<4 x i32> %X) {
+; CHECK: @test4
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: ret
+ %tmp152.i53899.i = shufflevector <4 x i32> %X, <4 x i32> undef, <4 x i32> zeroinitializer
+ %tmp34 = extractelement <4 x i32> %tmp152.i53899.i, i32 0
+ ret i32 %tmp34
}
-float %test3(%T %A, %T %B, float %f) {
- %C = insertelement %T %A, float %f, uint 0
- %D = shufflevector %T %C, %T %B, <4 x uint> <uint 5, uint 0, uint 2, uint 7>
- %E = extractelement %T %D, uint 1
- ret float %E
+define i32 @test5(<4 x i32> %X) {
+; CHECK: @test5
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: ret
+ %tmp152.i53899.i = shufflevector <4 x i32> %X, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 undef, i32 undef>
+ %tmp34 = extractelement <4 x i32> %tmp152.i53899.i, i32 0
+ ret i32 %tmp34
+}
+
+define float @test6(<4 x float> %X) {
+; CHECK: @test6
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: ret
+ %X1 = bitcast <4 x float> %X to <4 x i32>
+ %tmp152.i53899.i = shufflevector <4 x i32> %X1, <4 x i32> undef, <4 x i32> zeroinitializer
+ %tmp152.i53900.i = bitcast <4 x i32> %tmp152.i53899.i to <4 x float>
+ %tmp34 = extractelement <4 x float> %tmp152.i53900.i, i32 0
+ ret float %tmp34
+}
+
+define <4 x float> @test7(<4 x float> %tmp45.i) {
+; CHECK: @test7
+; CHECK-NEXT: ret <4 x float> %tmp45.i
+ %tmp1642.i = shufflevector <4 x float> %tmp45.i, <4 x float> undef, <4 x i32> < i32 0, i32 1, i32 6, i32 7 >
+ ret <4 x float> %tmp1642.i
+}
+
+; This should turn into a single shuffle.
+define <4 x float> @test8(<4 x float> %tmp, <4 x float> %tmp1) {
+; CHECK: @test8
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+ %tmp4 = extractelement <4 x float> %tmp, i32 1
+ %tmp2 = extractelement <4 x float> %tmp, i32 3
+ %tmp1.upgrd.1 = extractelement <4 x float> %tmp1, i32 0
+ %tmp128 = insertelement <4 x float> undef, float %tmp4, i32 0
+ %tmp130 = insertelement <4 x float> %tmp128, float undef, i32 1
+ %tmp132 = insertelement <4 x float> %tmp130, float %tmp2, i32 2
+ %tmp134 = insertelement <4 x float> %tmp132, float %tmp1.upgrd.1, i32 3
+ ret <4 x float> %tmp134
+}
+
+; Test fold of two shuffles where the first shuffle vectors inputs are a
+; different length then the second.
+define <4 x i8> @test9(<16 x i8> %tmp6) nounwind {
+; CHECK: @test9
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+ %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 13, i32 9, i32 4, i32 13 > ; <<4 x i8>> [#uses=1]
+ %tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 > ; <<4 x i8>> [#uses=1]
+ ret <4 x i8> %tmp9
+}
+
+; Same as test9, but make sure that "undef" mask values are not confused with
+; mask values of 2*N, where N is the mask length. These shuffles should not
+; be folded (because [8,9,4,8] may not be a mask supported by the target).
+define <4 x i8> @test9a(<16 x i8> %tmp6) nounwind {
+; CHECK: @test9a
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+ %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 undef, i32 9, i32 4, i32 8 > ; <<4 x i8>> [#uses=1]
+ %tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 > ; <<4 x i8>> [#uses=1]
+ ret <4 x i8> %tmp9
+}
+
+; Test fold of two shuffles where the first shuffle vectors inputs are a
+; different length then the second.
+define <4 x i8> @test9b(<4 x i8> %tmp6, <4 x i8> %tmp7) nounwind {
+; CHECK: @test9
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <4 x i8> %tmp6, <4 x i8> %tmp7, <8 x i32> <i32 0, i32 1, i32 4, i32 5, i32 4, i32 5, i32 2, i32 3> ; <<4 x i8>> [#uses=1]
+ %tmp9 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <4 x i32> <i32 0, i32 1, i32 4, i32 5> ; <<4 x i8>> [#uses=1]
+ ret <4 x i8> %tmp9
+}
+
+; Redundant vector splats should be removed. Radar 8597790.
+define <4 x i32> @test10(<4 x i32> %tmp5) nounwind {
+; CHECK: @test10
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+ %tmp6 = shufflevector <4 x i32> %tmp5, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
+ %tmp7 = shufflevector <4 x i32> %tmp6, <4 x i32> undef, <4 x i32> zeroinitializer
+ ret <4 x i32> %tmp7
+}
+
+; Test fold of two shuffles where the two shufflevector inputs's op1 are
+; the same
+define <8 x i8> @test11(<16 x i8> %tmp6) nounwind {
+; CHECK: @test11
+; CHECK-NEXT: shufflevector <16 x i8> %tmp6, <16 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x i8>> [#uses=1]
+ %tmp2 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7> ; <<4 x i8>> [#uses=1]
+ %tmp3 = shufflevector <4 x i8> %tmp1, <4 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> ; <<8 x i8>> [#uses=1]
+ ret <8 x i8> %tmp3
}
-int %test4(<4 x int> %X) {
- %tmp152.i53899.i = shufflevector <4 x int> %X, <4 x int> undef, <4 x uint> zeroinitializer
- %tmp34 = extractelement <4 x int> %tmp152.i53899.i, uint 0
- ret int %tmp34
+; Test fold of two shuffles where the first shufflevector's inputs are
+; the same as the second
+define <8 x i8> @test12(<8 x i8> %tmp6, <8 x i8> %tmp2) nounwind {
+; CHECK: @test12
+; CHECK-NEXT: shufflevector <8 x i8> %tmp6, <8 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 9, i32 8, i32 11, i32 12>
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <8 x i8> %tmp6, <8 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 4, i32 undef, i32 7> ; <<8 x i8>> [#uses=1]
+ %tmp3 = shufflevector <8 x i8> %tmp1, <8 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 9, i32 8, i32 11, i32 12> ; <<8 x i8>> [#uses=1]
+ ret <8 x i8> %tmp3
}
-int %test5(<4 x int> %X) {
- %tmp152.i53899.i = shufflevector <4 x int> %X, <4 x int> undef, <4 x uint> <uint 3, uint 2, uint undef, uint undef>
- %tmp34 = extractelement <4 x int> %tmp152.i53899.i, uint 0
- ret int %tmp34
+; Test fold of two shuffles where the first shufflevector's inputs are
+; the same as the second
+define <8 x i8> @test12a(<8 x i8> %tmp6, <8 x i8> %tmp2) nounwind {
+; CHECK: @test12a
+; CHECK-NEXT: shufflevector <8 x i8> %tmp2, <8 x i8> %tmp6, <8 x i32> <i32 0, i32 3, i32 1, i32 4, i32 8, i32 9, i32 10, i32 11>
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <8 x i8> %tmp6, <8 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 4, i32 undef, i32 7> ; <<8 x i8>> [#uses=1]
+ %tmp3 = shufflevector <8 x i8> %tmp2, <8 x i8> %tmp1, <8 x i32> <i32 0, i32 3, i32 1, i32 4, i32 8, i32 9, i32 10, i32 11> ; <<8 x i8>> [#uses=1]
+ ret <8 x i8> %tmp3
}
projects / oota-llvm.git / blobdiff