forked from OSchip/llvm-project
47 lines
1000 B
LLVM
47 lines
1000 B
LLVM
; Test some floating point casting cases
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
define i8 @test1() {
|
|
%x = fptoui float 2.550000e+02 to i8 ; <i8> [#uses=1]
|
|
ret i8 %x
|
|
; CHECK: ret i8 -1
|
|
}
|
|
|
|
define i8 @test2() {
|
|
%x = fptosi float -1.000000e+00 to i8 ; <i8> [#uses=1]
|
|
ret i8 %x
|
|
; CHECK: ret i8 -1
|
|
}
|
|
|
|
; CHECK: test3
|
|
define half @test3(float %a) {
|
|
; CHECK: fptrunc
|
|
; CHECK: llvm.fabs.f16
|
|
%b = call float @llvm.fabs.f32(float %a)
|
|
%c = fptrunc float %b to half
|
|
ret half %c
|
|
}
|
|
|
|
; CHECK: test4
|
|
define half @test4(float %a) {
|
|
; CHECK: fptrunc
|
|
; CHECK: fsub
|
|
%b = fsub float -0.0, %a
|
|
%c = fptrunc float %b to half
|
|
ret half %c
|
|
}
|
|
|
|
; CHECK: test5
|
|
define half @test5(float %a, float %b, float %c) {
|
|
; CHECK: fcmp ogt
|
|
; CHECK: fptrunc
|
|
; CHECK: select
|
|
; CHECK: half 0xH3C00
|
|
%d = fcmp ogt float %a, %b
|
|
%e = select i1 %d, float %c, float 1.0
|
|
%f = fptrunc float %e to half
|
|
ret half %f
|
|
}
|
|
|
|
declare float @llvm.fabs.f32(float) nounwind readonly
|