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 57 define <1 x float> @test6(<1 x double> %V) { 58 %frem = frem <1 x double> %V, %V 59 %trunc = fptrunc <1 x double> %frem to <1 x float> 60 ret <1 x float> %trunc 61 ; CHECK-LABEL: @test6 62 ; CHECK-NEXT: %[[frem:.*]] = frem <1 x double> %V, %V 63 ; CHECK-NEXT: %[[trunc:.*]] = fptrunc <1 x double> %[[frem]] to <1 x float> 64 ; CHECK-NEXT: ret <1 x float> %trunc 65 } 66 67 define float @test7(double %V) { 68 %frem = frem double %V, 1.000000e+00 69 %trunc = fptrunc double %frem to float 70 ret float %trunc 71 ; CHECK-LABEL: @test7 72 ; CHECK-NEXT: %[[frem:.*]] = frem double %V, 1.000000e+00 73 ; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float 74 ; CHECK-NEXT: ret float %trunc 75 } 76 77 define float @test8(float %V) { 78 %fext = fpext float %V to double 79 %frem = frem double %fext, 1.000000e-01 80 %trunc = fptrunc double %frem to float 81 ret float %trunc 82 ; CHECK-LABEL: @test8 83 ; CHECK-NEXT: %[[fext:.*]] = fpext float %V to double 84 ; CHECK-NEXT: %[[frem:.*]] = frem double %fext, 1.000000e-01 85 ; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float 86 ; CHECK-NEXT: ret float %trunc 87 } 88 89 ; CHECK-LABEL: @test_fptrunc_fptrunc 90 ; CHECK-NOT: fptrunc double {{.*}} to half 91 define half @test_fptrunc_fptrunc(double %V) { 92 %t1 = fptrunc double %V to float 93 %t2 = fptrunc float %t1 to half 94 ret half %t2 95 } 96
