; RUN: opt < %s -instcombine -S | FileCheck %s | |
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 | |
} | |
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 | |
} | |
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 | |
} | |
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 | |
} | |
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 | |
} | |
; 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 | |
} |