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26dbe7ec18
by SRoA. This is part of rdar://7892780, but needs another xform to expose this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112232 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
2.0 KiB
LLVM
63 lines
2.0 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; Bitcasts between vectors and scalars are valid.
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; PR4487
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define i32 @test1(i64 %a) {
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%t1 = bitcast i64 %a to <2 x i32>
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%t2 = bitcast i64 %a to <2 x i32>
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%t3 = xor <2 x i32> %t1, %t2
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%t4 = extractelement <2 x i32> %t3, i32 0
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ret i32 %t4
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; CHECK: @test1
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; CHECK: ret i32 0
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}
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; Optimize bitcasts that are extracting low element of vector. This happens
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; because of SRoA.
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; rdar://7892780
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define float @test2(<2 x float> %A, <2 x i32> %B) {
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%tmp28 = bitcast <2 x float> %A to i64 ; <i64> [#uses=2]
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%tmp23 = trunc i64 %tmp28 to i32 ; <i32> [#uses=1]
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%tmp24 = bitcast i32 %tmp23 to float ; <float> [#uses=1]
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%tmp = bitcast <2 x i32> %B to i64
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%tmp2 = trunc i64 %tmp to i32 ; <i32> [#uses=1]
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%tmp4 = bitcast i32 %tmp2 to float ; <float> [#uses=1]
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%add = fadd float %tmp24, %tmp4
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ret float %add
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; CHECK: @test2
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; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 0
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; CHECK-NEXT: bitcast <2 x i32> %B to <2 x float>
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; CHECK-NEXT: %tmp4 = extractelement <2 x float> {{.*}}, i32 0
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; CHECK-NEXT: %add = fadd float %tmp24, %tmp4
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; CHECK-NEXT: ret float %add
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}
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; Optimize bitcasts that are extracting other elements of a vector. This
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; happens because of SRoA.
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; rdar://7892780
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define float @test3(<2 x float> %A, <2 x i64> %B) {
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%tmp28 = bitcast <2 x float> %A to i64
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%tmp29 = lshr i64 %tmp28, 32
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%tmp23 = trunc i64 %tmp29 to i32
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%tmp24 = bitcast i32 %tmp23 to float
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%tmp = bitcast <2 x i64> %B to i128
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%tmp1 = lshr i128 %tmp, 64
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%tmp2 = trunc i128 %tmp1 to i32
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%tmp4 = bitcast i32 %tmp2 to float
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%add = fadd float %tmp24, %tmp4
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ret float %add
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; CHECK: @test3
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; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 1
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; CHECK-NEXT: bitcast <2 x i64> %B to <4 x float>
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; CHECK-NEXT: %tmp4 = extractelement <4 x float> {{.*}}, i32 2
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; CHECK-NEXT: %add = fadd float %tmp24, %tmp4
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; CHECK-NEXT: ret float %add
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}
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