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104 lines
2.6 KiB
LLVM
104 lines
2.6 KiB
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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declare {i8, i1} @llvm.uadd.with.overflow.i8(i8 %a, i8 %b)
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define i1 @test_uadd1() {
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; CHECK: @test_uadd1
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%x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 254, i8 3)
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%overflow = extractvalue {i8, i1} %x, 1
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ret i1 %overflow
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; CHECK-NEXT: ret i1 true
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}
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define i8 @test_uadd2() {
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; CHECK: @test_uadd2
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%x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 254, i8 44)
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%result = extractvalue {i8, i1} %x, 0
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ret i8 %result
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; CHECK-NEXT: ret i8 42
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}
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declare i256 @llvm.cttz.i256(i256 %src, i1 %is_zero_undef)
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define i256 @test_cttz() {
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; CHECK: @test_cttz
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%x = call i256 @llvm.cttz.i256(i256 10, i1 false)
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ret i256 %x
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; CHECK-NEXT: ret i256 1
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}
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declare i256 @llvm.ctpop.i256(i256 %src)
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define i256 @test_ctpop() {
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; CHECK: @test_ctpop
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%x = call i256 @llvm.ctpop.i256(i256 10)
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ret i256 %x
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; CHECK-NEXT: ret i256 2
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}
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; Test a non-intrinsic that we know about as a library call.
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declare float @fabs(float %x)
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define float @test_fabs_libcall() {
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; CHECK: @test_fabs_libcall
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%x = call float @fabs(float -42.0)
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; This is still a real function call, so instsimplify won't nuke it -- other
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; passes have to do that.
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; CHECK-NEXT: call float @fabs
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ret float %x
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; CHECK-NEXT: ret float 4.2{{0+}}e+01
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}
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declare float @llvm.fabs.f32(float) nounwind readnone
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declare float @llvm.floor.f32(float) nounwind readnone
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declare float @llvm.ceil.f32(float) nounwind readnone
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declare float @llvm.trunc.f32(float) nounwind readnone
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declare float @llvm.rint.f32(float) nounwind readnone
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declare float @llvm.nearbyint.f32(float) nounwind readnone
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; Test idempotent intrinsics
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define float @test_idempotence(float %a) {
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; CHECK: @test_idempotence
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; CHECK: fabs
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; CHECK-NOT: fabs
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%a0 = call float @llvm.fabs.f32(float %a)
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%a1 = call float @llvm.fabs.f32(float %a0)
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; CHECK: floor
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; CHECK-NOT: floor
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%b0 = call float @llvm.floor.f32(float %a)
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%b1 = call float @llvm.floor.f32(float %b0)
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; CHECK: ceil
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; CHECK-NOT: ceil
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%c0 = call float @llvm.ceil.f32(float %a)
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%c1 = call float @llvm.ceil.f32(float %c0)
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; CHECK: trunc
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; CHECK-NOT: trunc
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%d0 = call float @llvm.trunc.f32(float %a)
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%d1 = call float @llvm.trunc.f32(float %d0)
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; CHECK: rint
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; CHECK-NOT: rint
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%e0 = call float @llvm.rint.f32(float %a)
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%e1 = call float @llvm.rint.f32(float %e0)
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; CHECK: nearbyint
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; CHECK-NOT: nearbyint
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%f0 = call float @llvm.nearbyint.f32(float %a)
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%f1 = call float @llvm.nearbyint.f32(float %f0)
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%r0 = fadd float %a1, %b1
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%r1 = fadd float %r0, %c1
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%r2 = fadd float %r1, %d1
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%r3 = fadd float %r2, %e1
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%r4 = fadd float %r3, %f1
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ret float %r4
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}
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