1; Test some floating point casting cases 2; RUN: opt < %s -instcombine -S | FileCheck %s 3 4define i8 @test1() { 5 %x = fptoui float 2.550000e+02 to i8 ; <i8> [#uses=1] 6 ret i8 %x 7; CHECK: ret i8 -1 8} 9 10define i8 @test2() { 11 %x = fptosi float -1.000000e+00 to i8 ; <i8> [#uses=1] 12 ret i8 %x 13; CHECK: ret i8 -1 14} 15 16; CHECK: test3 17define half @test3(float %a) { 18; CHECK: fptrunc 19; CHECK: llvm.fabs.f16 20 %b = call float @llvm.fabs.f32(float %a) 21 %c = fptrunc float %b to half 22 ret half %c 23} 24 25; CHECK: test4 26define half @test4(float %a) { 27; CHECK: fptrunc 28; CHECK: fsub 29 %b = fsub float -0.0, %a 30 %c = fptrunc float %b to half 31 ret half %c 32} 33 34; CHECK: test5 35define half @test5(float %a, float %b, float %c) { 36; CHECK: fcmp ogt 37; CHECK: fptrunc 38; CHECK: select 39; CHECK: half 0xH3C00 40 %d = fcmp ogt float %a, %b 41 %e = select i1 %d, float %c, float 1.0 42 %f = fptrunc float %e to half 43 ret half %f 44} 45 46declare float @llvm.fabs.f32(float) nounwind readonly 47