| ; 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: test4-fast |
| define half @test4-fast(float %a) { |
| ; CHECK: fptrunc |
| ; CHECK: fsub fast |
| %b = fsub fast 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 |
| |
| define <1 x float> @test6(<1 x double> %V) { |
| %frem = frem <1 x double> %V, %V |
| %trunc = fptrunc <1 x double> %frem to <1 x float> |
| ret <1 x float> %trunc |
| ; CHECK-LABEL: @test6 |
| ; CHECK-NEXT: %[[frem:.*]] = frem <1 x double> %V, %V |
| ; CHECK-NEXT: %[[trunc:.*]] = fptrunc <1 x double> %[[frem]] to <1 x float> |
| ; CHECK-NEXT: ret <1 x float> %trunc |
| } |
| |
| define float @test7(double %V) { |
| %frem = frem double %V, 1.000000e+00 |
| %trunc = fptrunc double %frem to float |
| ret float %trunc |
| ; CHECK-LABEL: @test7 |
| ; CHECK-NEXT: %[[frem:.*]] = frem double %V, 1.000000e+00 |
| ; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float |
| ; CHECK-NEXT: ret float %trunc |
| } |
| |
| define float @test8(float %V) { |
| %fext = fpext float %V to double |
| %frem = frem double %fext, 1.000000e-01 |
| %trunc = fptrunc double %frem to float |
| ret float %trunc |
| ; CHECK-LABEL: @test8 |
| ; CHECK-NEXT: %[[fext:.*]] = fpext float %V to double |
| ; CHECK-NEXT: %[[frem:.*]] = frem double %fext, 1.000000e-01 |
| ; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float |
| ; CHECK-NEXT: ret float %trunc |
| } |
| |
| ; CHECK-LABEL: @test_fptrunc_fptrunc |
| ; CHECK-NOT: fptrunc double {{.*}} to half |
| define half @test_fptrunc_fptrunc(double %V) { |
| %t1 = fptrunc double %V to float |
| %t2 = fptrunc float %t1 to half |
| ret half %t2 |
| } |