llvm-6502/test/CodeGen/PowerPC/vsx.ll

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[PowerPC] Initial support for the VSX instruction set VSX is an ISA extension supported on the POWER7 and later cores that enhances floating-point vector and scalar capabilities. Among other things, this adds <2 x double> support and generally helps to reduce register pressure. The interesting part of this ISA feature is the register configuration: there are 64 new 128-bit vector registers, the 32 of which are super-registers of the existing 32 scalar floating-point registers, and the second 32 of which overlap with the 32 Altivec vector registers. This makes things like vector insertion and extraction tricky: this can be free but only if we force a restriction to the right register subclass when needed. A new "minipass" PPCVSXCopy takes care of this (although it could do a more-optimal job of it; see the comment about unnecessary copies below). Please note that, currently, VSX is not enabled by default when targeting anything because it is not yet ready for that. The assembler and disassembler are fully implemented and tested. However: - CodeGen support causes miscompiles; test-suite runtime failures: MultiSource/Benchmarks/FreeBench/distray/distray MultiSource/Benchmarks/McCat/08-main/main MultiSource/Benchmarks/Olden/voronoi/voronoi MultiSource/Benchmarks/mafft/pairlocalalign MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4 SingleSource/Benchmarks/CoyoteBench/almabench SingleSource/Benchmarks/Misc/matmul_f64_4x4 - The lowering currently falls back to using Altivec instructions far more than it should. Worse, there are some things that are scalarized through the stack that shouldn't be. - A lot of unnecessary copies make it past the optimizers, and this needs to be fixed. - Many more regression tests are needed. Normally, I'd fix these things prior to committing, but there are some students and other contributors who would like to work this, and so it makes sense to move this development process upstream where it can be subject to the regular code-review procedures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203768 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-13 07:58:58 +00:00
; RUN: llc -mcpu=pwr7 -mattr=+vsx < %s | FileCheck %s
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
define double @test1(double %a, double %b) {
entry:
%v = fmul double %a, %b
ret double %v
; CHECK-LABEL: @test1
; CHECK: xsmuldp 1, 1, 2
; CHECK: blr
}
define double @test2(double %a, double %b) {
entry:
%v = fdiv double %a, %b
ret double %v
; CHECK-LABEL: @test2
; CHECK: xsdivdp 1, 1, 2
; CHECK: blr
}
define double @test3(double %a, double %b) {
entry:
%v = fadd double %a, %b
ret double %v
; CHECK-LABEL: @test3
; CHECK: xsadddp 1, 1, 2
; CHECK: blr
}
define <2 x double> @test4(<2 x double> %a, <2 x double> %b) {
entry:
%v = fadd <2 x double> %a, %b
ret <2 x double> %v
; CHECK-LABEL: @test4
; CHECK: xvadddp 34, 34, 35
[PowerPC] Initial support for the VSX instruction set VSX is an ISA extension supported on the POWER7 and later cores that enhances floating-point vector and scalar capabilities. Among other things, this adds <2 x double> support and generally helps to reduce register pressure. The interesting part of this ISA feature is the register configuration: there are 64 new 128-bit vector registers, the 32 of which are super-registers of the existing 32 scalar floating-point registers, and the second 32 of which overlap with the 32 Altivec vector registers. This makes things like vector insertion and extraction tricky: this can be free but only if we force a restriction to the right register subclass when needed. A new "minipass" PPCVSXCopy takes care of this (although it could do a more-optimal job of it; see the comment about unnecessary copies below). Please note that, currently, VSX is not enabled by default when targeting anything because it is not yet ready for that. The assembler and disassembler are fully implemented and tested. However: - CodeGen support causes miscompiles; test-suite runtime failures: MultiSource/Benchmarks/FreeBench/distray/distray MultiSource/Benchmarks/McCat/08-main/main MultiSource/Benchmarks/Olden/voronoi/voronoi MultiSource/Benchmarks/mafft/pairlocalalign MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4 SingleSource/Benchmarks/CoyoteBench/almabench SingleSource/Benchmarks/Misc/matmul_f64_4x4 - The lowering currently falls back to using Altivec instructions far more than it should. Worse, there are some things that are scalarized through the stack that shouldn't be. - A lot of unnecessary copies make it past the optimizers, and this needs to be fixed. - Many more regression tests are needed. Normally, I'd fix these things prior to committing, but there are some students and other contributors who would like to work this, and so it makes sense to move this development process upstream where it can be subject to the regular code-review procedures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203768 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-13 07:58:58 +00:00
; CHECK: blr
}
define <4 x i32> @test5(<4 x i32> %a, <4 x i32> %b) {
entry:
%v = xor <4 x i32> %a, %b
ret <4 x i32> %v
; CHECK-LABEL: @test5
; CHECK: xxlxor 34, 34, 35
; CHECK: blr
}
define <8 x i16> @test6(<8 x i16> %a, <8 x i16> %b) {
entry:
%v = xor <8 x i16> %a, %b
ret <8 x i16> %v
; CHECK-LABEL: @test6
; CHECK: xxlxor 34, 34, 35
; CHECK: blr
}
define <16 x i8> @test7(<16 x i8> %a, <16 x i8> %b) {
entry:
%v = xor <16 x i8> %a, %b
ret <16 x i8> %v
; CHECK-LABEL: @test7
; CHECK: xxlxor 34, 34, 35
; CHECK: blr
}
define <4 x i32> @test8(<4 x i32> %a, <4 x i32> %b) {
entry:
%v = or <4 x i32> %a, %b
ret <4 x i32> %v
; CHECK-LABEL: @test8
; CHECK: xxlor 34, 34, 35
; CHECK: blr
}
define <8 x i16> @test9(<8 x i16> %a, <8 x i16> %b) {
entry:
%v = or <8 x i16> %a, %b
ret <8 x i16> %v
; CHECK-LABEL: @test9
; CHECK: xxlor 34, 34, 35
; CHECK: blr
}
define <16 x i8> @test10(<16 x i8> %a, <16 x i8> %b) {
entry:
%v = or <16 x i8> %a, %b
ret <16 x i8> %v
; CHECK-LABEL: @test10
; CHECK: xxlor 34, 34, 35
; CHECK: blr
}
define <4 x i32> @test11(<4 x i32> %a, <4 x i32> %b) {
entry:
%v = and <4 x i32> %a, %b
ret <4 x i32> %v
; CHECK-LABEL: @test11
; CHECK: xxland 34, 34, 35
; CHECK: blr
}
define <8 x i16> @test12(<8 x i16> %a, <8 x i16> %b) {
entry:
%v = and <8 x i16> %a, %b
ret <8 x i16> %v
; CHECK-LABEL: @test12
; CHECK: xxland 34, 34, 35
; CHECK: blr
}
define <16 x i8> @test13(<16 x i8> %a, <16 x i8> %b) {
entry:
%v = and <16 x i8> %a, %b
ret <16 x i8> %v
; CHECK-LABEL: @test13
; CHECK: xxland 34, 34, 35
; CHECK: blr
}
define <4 x i32> @test14(<4 x i32> %a, <4 x i32> %b) {
entry:
%v = or <4 x i32> %a, %b
%w = xor <4 x i32> %v, <i32 -1, i32 -1, i32 -1, i32 -1>
ret <4 x i32> %w
; CHECK-LABEL: @test14
; CHECK: xxlnor 34, 34, 35
; CHECK: blr
}
define <8 x i16> @test15(<8 x i16> %a, <8 x i16> %b) {
entry:
%v = or <8 x i16> %a, %b
%w = xor <8 x i16> %v, <i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1>
ret <8 x i16> %w
; CHECK-LABEL: @test15
; CHECK: xxlnor 34, 34, 35
; CHECK: blr
}
define <16 x i8> @test16(<16 x i8> %a, <16 x i8> %b) {
entry:
%v = or <16 x i8> %a, %b
%w = xor <16 x i8> %v, <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>
ret <16 x i8> %w
; CHECK-LABEL: @test16
; CHECK: xxlnor 34, 34, 35
; CHECK: blr
}
define <4 x i32> @test17(<4 x i32> %a, <4 x i32> %b) {
entry:
%w = xor <4 x i32> %b, <i32 -1, i32 -1, i32 -1, i32 -1>
%v = and <4 x i32> %a, %w
ret <4 x i32> %v
; CHECK-LABEL: @test17
; CHECK: xxlandc 34, 34, 35
; CHECK: blr
}
define <8 x i16> @test18(<8 x i16> %a, <8 x i16> %b) {
entry:
%w = xor <8 x i16> %b, <i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1>
%v = and <8 x i16> %a, %w
ret <8 x i16> %v
; CHECK-LABEL: @test18
; CHECK: xxlandc 34, 34, 35
; CHECK: blr
}
define <16 x i8> @test19(<16 x i8> %a, <16 x i8> %b) {
entry:
%w = xor <16 x i8> %b, <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>
%v = and <16 x i8> %a, %w
ret <16 x i8> %v
; CHECK-LABEL: @test19
; CHECK: xxlandc 34, 34, 35
; CHECK: blr
}
define <4 x i32> @test20(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c, <4 x i32> %d) {
entry:
%m = icmp eq <4 x i32> %c, %d
%v = select <4 x i1> %m, <4 x i32> %a, <4 x i32> %b
ret <4 x i32> %v
; CHECK-LABEL: @test20
; CHECK: vcmpequw {{[0-9]+}}, 4, 5
; CHECK: xxsel 34, 35, 34, {{[0-9]+}}
; CHECK: blr
}
define <4 x float> @test21(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d) {
entry:
%m = fcmp oeq <4 x float> %c, %d
%v = select <4 x i1> %m, <4 x float> %a, <4 x float> %b
ret <4 x float> %v
; CHECK-LABEL: @test21
; CHECK: xvcmpeqsp [[V1:[0-9]+]], 36, 37
; CHECK: xxsel 34, 35, 34, [[V1]]
; CHECK: blr
}
define <4 x float> @test22(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d) {
entry:
%m = fcmp ueq <4 x float> %c, %d
%v = select <4 x i1> %m, <4 x float> %a, <4 x float> %b
ret <4 x float> %v
; CHECK-LABEL: @test22
; CHECK-DAG: xvcmpeqsp {{[0-9]+}}, 37, 37
; CHECK-DAG: xvcmpeqsp {{[0-9]+}}, 36, 36
; CHECK-DAG: xvcmpeqsp {{[0-9]+}}, 36, 37
; CHECK-DAG: xxlnor
; CHECK-DAG: xxlnor
; CHECK-DAG: xxlor
; CHECK-DAG: xxlor
; CHECK: xxsel 34, 35, 34, {{[0-9]+}}
; CHECK: blr
}
define <8 x i16> @test23(<8 x i16> %a, <8 x i16> %b, <8 x i16> %c, <8 x i16> %d) {
entry:
%m = icmp eq <8 x i16> %c, %d
%v = select <8 x i1> %m, <8 x i16> %a, <8 x i16> %b
ret <8 x i16> %v
; CHECK-LABEL: @test23
; CHECK: vcmpequh {{[0-9]+}}, 4, 5
; CHECK: xxsel 34, 35, 34, {{[0-9]+}}
; CHECK: blr
}
define <16 x i8> @test24(<16 x i8> %a, <16 x i8> %b, <16 x i8> %c, <16 x i8> %d) {
entry:
%m = icmp eq <16 x i8> %c, %d
%v = select <16 x i1> %m, <16 x i8> %a, <16 x i8> %b
ret <16 x i8> %v
; CHECK-LABEL: @test24
; CHECK: vcmpequb {{[0-9]+}}, 4, 5
; CHECK: xxsel 34, 35, 34, {{[0-9]+}}
; CHECK: blr
}
define <2 x double> @test25(<2 x double> %a, <2 x double> %b, <2 x double> %c, <2 x double> %d) {
entry:
%m = fcmp oeq <2 x double> %c, %d
%v = select <2 x i1> %m, <2 x double> %a, <2 x double> %b
ret <2 x double> %v
; CHECK-LABEL: @test25
; CHECK: xvcmpeqdp [[V1:[0-9]+]], 36, 37
; CHECK: xxsel 34, 35, 34, [[V1]]
; CHECK: blr
}
define <2 x i64> @test26(<2 x i64> %a, <2 x i64> %b) {
%v = add <2 x i64> %a, %b
ret <2 x i64> %v
; CHECK-LABEL: @test26
; Make sure we use only two stores (one for each operand).
; CHECK: stxvd2x 35,
; CHECK: stxvd2x 34,
; CHECK-NOT: stxvd2x
; FIXME: The code quality here is not good; just make sure we do something for now.
; CHECK: add
; CHECK: add
; CHECK: blr
}
define <2 x i64> @test27(<2 x i64> %a, <2 x i64> %b) {
%v = and <2 x i64> %a, %b
ret <2 x i64> %v
; CHECK-LABEL: @test27
; CHECK: xxland 34, 34, 35
; CHECK: blr
}
define <2 x double> @test28(<2 x double>* %a) {
%v = load <2 x double>* %a, align 16
ret <2 x double> %v
; CHECK-LABEL: @test28
; CHECK: lxvd2x 34, 0, 3
; CHECK: blr
}
define void @test29(<2 x double>* %a, <2 x double> %b) {
store <2 x double> %b, <2 x double>* %a, align 16
ret void
; CHECK-LABEL: @test29
; CHECK: stxvd2x 34, 0, 3
; CHECK: blr
}
define <2 x double> @test28u(<2 x double>* %a) {
%v = load <2 x double>* %a, align 8
ret <2 x double> %v
; CHECK-LABEL: @test28u
; CHECK: lxvd2x 34, 0, 3
; CHECK: blr
}
define void @test29u(<2 x double>* %a, <2 x double> %b) {
store <2 x double> %b, <2 x double>* %a, align 8
ret void
; CHECK-LABEL: @test29u
; CHECK: stxvd2x 34, 0, 3
; CHECK: blr
}
define <2 x i64> @test30(<2 x i64>* %a) {
%v = load <2 x i64>* %a, align 16
ret <2 x i64> %v
; CHECK-LABEL: @test30
; CHECK: lxvd2x 34, 0, 3
; CHECK: blr
}
define void @test31(<2 x i64>* %a, <2 x i64> %b) {
store <2 x i64> %b, <2 x i64>* %a, align 16
ret void
; CHECK-LABEL: @test31
; CHECK: stxvd2x 34, 0, 3
; CHECK: blr
}
define <2 x double> @test40(<2 x i64> %a) {
%v = uitofp <2 x i64> %a to <2 x double>
ret <2 x double> %v
; CHECK-LABEL: @test40
; CHECK: xvcvuxddp 34, 34
; CHECK: blr
}
define <2 x double> @test41(<2 x i64> %a) {
%v = sitofp <2 x i64> %a to <2 x double>
ret <2 x double> %v
; CHECK-LABEL: @test41
; CHECK: xvcvsxddp 34, 34
; CHECK: blr
}
define <2 x i64> @test42(<2 x double> %a) {
%v = fptoui <2 x double> %a to <2 x i64>
ret <2 x i64> %v
; CHECK-LABEL: @test42
; CHECK: xvcvdpuxds 34, 34
; CHECK: blr
}
define <2 x i64> @test43(<2 x double> %a) {
%v = fptosi <2 x double> %a to <2 x i64>
ret <2 x i64> %v
; CHECK-LABEL: @test43
; CHECK: xvcvdpsxds 34, 34
; CHECK: blr
}
define <2 x float> @test44(<2 x i64> %a) {
%v = uitofp <2 x i64> %a to <2 x float>
ret <2 x float> %v
; CHECK-LABEL: @test44
; FIXME: The code quality here looks pretty bad.
; CHECK: blr
}
define <2 x float> @test45(<2 x i64> %a) {
%v = sitofp <2 x i64> %a to <2 x float>
ret <2 x float> %v
; CHECK-LABEL: @test45
; FIXME: The code quality here looks pretty bad.
; CHECK: blr
}
define <2 x i64> @test46(<2 x float> %a) {
%v = fptoui <2 x float> %a to <2 x i64>
ret <2 x i64> %v
; CHECK-LABEL: @test46
; FIXME: The code quality here looks pretty bad.
; CHECK: blr
}
define <2 x i64> @test47(<2 x float> %a) {
%v = fptosi <2 x float> %a to <2 x i64>
ret <2 x i64> %v
; CHECK-LABEL: @test47
; FIXME: The code quality here looks pretty bad.
; CHECK: blr
}
define <2 x double> @test50(double* %a) {
%v = load double* %a, align 8
%w = insertelement <2 x double> undef, double %v, i32 0
%x = insertelement <2 x double> %w, double %v, i32 1
ret <2 x double> %x
; CHECK-LABEL: @test50
; CHECK: lxvdsx 34, 0, 3
; CHECK: blr
}
define <2 x double> @test51(<2 x double> %a, <2 x double> %b) {
%v = shufflevector <2 x double> %a, <2 x double> %b, <2 x i32> <i32 0, i32 0>
ret <2 x double> %v
; CHECK-LABEL: @test51
; CHECK: xxpermdi 34, 34, 34, 0
; CHECK: blr
}
define <2 x double> @test52(<2 x double> %a, <2 x double> %b) {
%v = shufflevector <2 x double> %a, <2 x double> %b, <2 x i32> <i32 0, i32 2>
ret <2 x double> %v
; CHECK-LABEL: @test52
; CHECK: xxpermdi 34, 34, 35, 0
; CHECK: blr
}
define <2 x double> @test53(<2 x double> %a, <2 x double> %b) {
%v = shufflevector <2 x double> %a, <2 x double> %b, <2 x i32> <i32 2, i32 0>
ret <2 x double> %v
; CHECK-LABEL: @test53
; CHECK: xxpermdi 34, 35, 34, 0
; CHECK: blr
}
define <2 x double> @test54(<2 x double> %a, <2 x double> %b) {
%v = shufflevector <2 x double> %a, <2 x double> %b, <2 x i32> <i32 1, i32 2>
ret <2 x double> %v
; CHECK-LABEL: @test54
; CHECK: xxpermdi 34, 34, 35, 2
; CHECK: blr
}
define <2 x double> @test55(<2 x double> %a, <2 x double> %b) {
%v = shufflevector <2 x double> %a, <2 x double> %b, <2 x i32> <i32 1, i32 3>
ret <2 x double> %v
; CHECK-LABEL: @test55
; CHECK: xxpermdi 34, 34, 35, 3
; CHECK: blr
}
define <2 x i64> @test56(<2 x i64> %a, <2 x i64> %b) {
%v = shufflevector <2 x i64> %a, <2 x i64> %b, <2 x i32> <i32 1, i32 3>
ret <2 x i64> %v
; CHECK-LABEL: @test56
; CHECK: xxpermdi 34, 34, 35, 3
; CHECK: blr
}
define <2 x i64> @test60(<2 x i64> %a, <2 x i64> %b) {
%v = shl <2 x i64> %a, %b
ret <2 x i64> %v
; CHECK-LABEL: @test60
; This should scalarize, and the current code quality is not good.
; CHECK: stxvd2x
; CHECK: stxvd2x
; CHECK: sld
; CHECK: sld
; CHECK: lxvd2x
; CHECK: blr
}
define <2 x i64> @test61(<2 x i64> %a, <2 x i64> %b) {
%v = lshr <2 x i64> %a, %b
ret <2 x i64> %v
; CHECK-LABEL: @test61
; This should scalarize, and the current code quality is not good.
; CHECK: stxvd2x
; CHECK: stxvd2x
; CHECK: srd
; CHECK: srd
; CHECK: lxvd2x
; CHECK: blr
}
define <2 x i64> @test62(<2 x i64> %a, <2 x i64> %b) {
%v = ashr <2 x i64> %a, %b
ret <2 x i64> %v
; CHECK-LABEL: @test62
; This should scalarize, and the current code quality is not good.
; CHECK: stxvd2x
; CHECK: stxvd2x
; CHECK: srad
; CHECK: srad
; CHECK: lxvd2x
; CHECK: blr
}
define double @test63(<2 x double> %a) {
%v = extractelement <2 x double> %a, i32 0
ret double %v
; CHECK-LABEL: @test63
; CHECK: xxlor 1, 34, 34
; CHECK: blr
}
define double @test64(<2 x double> %a) {
%v = extractelement <2 x double> %a, i32 1
ret double %v
; CHECK-LABEL: @test64
; CHECK: xxpermdi 1, 34, 34, 2
; CHECK: blr
}
define <2 x i1> @test65(<2 x i64> %a, <2 x i64> %b) {
%w = icmp eq <2 x i64> %a, %b
ret <2 x i1> %w
; CHECK-LABEL: @test65
; CHECK: vcmpequw 2, 2, 3
; CHECK: blr
}
define <2 x i1> @test66(<2 x i64> %a, <2 x i64> %b) {
%w = icmp ne <2 x i64> %a, %b
ret <2 x i1> %w
; CHECK-LABEL: @test66
; CHECK: vcmpequw {{[0-9]+}}, 2, 3
; CHECK: xxlnor 34, {{[0-9]+}}, {{[0-9]+}}
; CHECK: blr
}
define <2 x i1> @test67(<2 x i64> %a, <2 x i64> %b) {
%w = icmp ult <2 x i64> %a, %b
ret <2 x i1> %w
; CHECK-LABEL: @test67
; This should scalarize, and the current code quality is not good.
; CHECK: stxvd2x
; CHECK: stxvd2x
; CHECK: cmpld
; CHECK: cmpld
; CHECK: lxvd2x
; CHECK: blr
}
define <2 x double> @test68(<2 x i32> %a) {
%w = sitofp <2 x i32> %a to <2 x double>
ret <2 x double> %w
; CHECK-LABEL: @test68
; CHECK: xxsldwi [[V1:[0-9]+]], 34, 34, 1
; CHECK: xvcvsxwdp 34, [[V1]]
; CHECK: blr
}
define <2 x double> @test69(<2 x i16> %a) {
%w = sitofp <2 x i16> %a to <2 x double>
ret <2 x double> %w
; CHECK-LABEL: @test69
; CHECK: vspltisw [[V1:[0-9]+]], 8
; CHECK: vadduwm [[V2:[0-9]+]], [[V1]], [[V1]]
; CHECK: vslw [[V3:[0-9]+]], 2, [[V2]]
; CHECK: vsraw {{[0-9]+}}, [[V3]], [[V2]]
; CHECK: xxsldwi [[V4:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}, 1
; CHECK: xvcvsxwdp 34, [[V4]]
; CHECK: blr
}
define <2 x double> @test70(<2 x i8> %a) {
%w = sitofp <2 x i8> %a to <2 x double>
ret <2 x double> %w
; CHECK-LABEL: @test70
; CHECK: vspltisw [[V1:[0-9]+]], 12
; CHECK: vadduwm [[V2:[0-9]+]], [[V1]], [[V1]]
; CHECK: vslw [[V3:[0-9]+]], 2, [[V2]]
; CHECK: vsraw {{[0-9]+}}, [[V3]], [[V2]]
; CHECK: xxsldwi [[V4:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}, 1
; CHECK: xvcvsxwdp 34, [[V4]]
; CHECK: blr
}
define <2 x i32> @test80(i32 %v) {
%b1 = insertelement <2 x i32> undef, i32 %v, i32 0
%b2 = shufflevector <2 x i32> %b1, <2 x i32> undef, <2 x i32> zeroinitializer
%i = add <2 x i32> %b2, <i32 2, i32 3>
ret <2 x i32> %i
; CHECK-LABEL: @test80
; CHECK-DAG: addi [[R1:[0-9]+]], 3, 3
; CHECK-DAG: addi [[R2:[0-9]+]], 1, -16
; CHECK-DAG: addi [[R3:[0-9]+]], 3, 2
; CHECK: std [[R1]], -8(1)
; CHECK: std [[R3]], -16(1)
; CHECK: lxvd2x 34, 0, [[R2]]
; CHECK-NOT: stxvd2x
; CHECK: blr
}
define <2 x double> @test81(<4 x float> %b) {
%w = bitcast <4 x float> %b to <2 x double>
ret <2 x double> %w
; CHECK-LABEL: @test81
; CHECK: blr
}