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35 lines
742 B
LLVM
35 lines
742 B
LLVM
; Test some floating point casting cases
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i8 @test1() {
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%x = fptoui float 2.550000e+02 to i8 ; <i8> [#uses=1]
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ret i8 %x
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; CHECK: ret i8 -1
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}
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define i8 @test2() {
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%x = fptosi float -1.000000e+00 to i8 ; <i8> [#uses=1]
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ret i8 %x
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; CHECK: ret i8 -1
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}
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; CHECK: test3
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define half @test3(float %a) {
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; CHECK: fptrunc
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; CHECK: llvm.fabs.f16
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%b = call float @llvm.fabs.f32(float %a)
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%c = fptrunc float %b to half
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ret half %c
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}
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; CHECK: test4
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define half @test4(float %a) {
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; CHECK: fptrunc
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; CHECK: fsub
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%b = fsub float -0.0, %a
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%c = fptrunc float %b to half
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ret half %c
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}
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declare float @llvm.fabs.f32(float) nounwind readonly
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