1 ; Test some floating point casting cases 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 4 define 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 10 define 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 17 define 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 26 define 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: test4-fast 35 define half @test4-fast(float %a) { 36 ; CHECK: fptrunc 37 ; CHECK: fsub fast 38 %b = fsub fast float -0.0, %a 39 %c = fptrunc float %b to half 40 ret half %c 41 } 42 43 ; CHECK: test5 44 define half @test5(float %a, float %b, float %c) { 45 ; CHECK: fcmp ogt 46 ; CHECK: fptrunc 47 ; CHECK: select 48 ; CHECK: half 0xH3C00 49 %d = fcmp ogt float %a, %b 50 %e = select i1 %d, float %c, float 1.0 51 %f = fptrunc float %e to half 52 ret half %f 53 } 54 55 declare float @llvm.fabs.f32(float) nounwind readonly 56
