| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test some floating point casting cases |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| define i8 @test1() { |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: ret i8 -1 |
| ; |
| %x = fptoui float 2.550000e+02 to i8 |
| ret i8 %x |
| } |
| |
| define i8 @test2() { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: ret i8 -1 |
| ; |
| %x = fptosi float -1.000000e+00 to i8 |
| ret i8 %x |
| } |
| |
| define half @test3(float %a) { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: [[TMP1:%.*]] = fptrunc float [[A:%.*]] to half |
| ; CHECK-NEXT: [[C:%.*]] = call half @llvm.fabs.f16(half [[TMP1]]) |
| ; CHECK-NEXT: ret half [[C]] |
| ; |
| %b = call float @llvm.fabs.f32(float %a) |
| %c = fptrunc float %b to half |
| ret half %c |
| } |
| |
| define half @test4(float %a) { |
| ; CHECK-LABEL: @test4( |
| ; CHECK-NEXT: [[TMP1:%.*]] = fptrunc float [[A:%.*]] to half |
| ; CHECK-NEXT: [[C:%.*]] = fsub half 0xH8000, [[TMP1]] |
| ; CHECK-NEXT: ret half [[C]] |
| ; |
| %b = fsub float -0.0, %a |
| %c = fptrunc float %b to half |
| ret half %c |
| } |
| |
| define half @test4-fast(float %a) { |
| ; CHECK-LABEL: @test4-fast( |
| ; CHECK-NEXT: [[TMP1:%.*]] = fptrunc float [[A:%.*]] to half |
| ; CHECK-NEXT: [[C:%.*]] = fsub fast half 0xH8000, [[TMP1]] |
| ; CHECK-NEXT: ret half [[C]] |
| ; |
| %b = fsub fast float -0.0, %a |
| %c = fptrunc float %b to half |
| ret half %c |
| } |
| |
| define half @test5(float %a, float %b, float %c) { |
| ; CHECK-LABEL: @test5( |
| ; CHECK-NEXT: [[D:%.*]] = fcmp ogt float [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[E:%.*]] = select i1 [[D]], float [[C:%.*]], float 1.000000e+00 |
| ; CHECK-NEXT: [[F:%.*]] = fptrunc float [[E]] to half |
| ; CHECK-NEXT: ret half [[F]] |
| ; |
| %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) { |
| ; 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]] |
| ; |
| %frem = frem <1 x double> %V, %V |
| %trunc = fptrunc <1 x double> %frem to <1 x float> |
| ret <1 x float> %trunc |
| } |
| |
| define float @test7(double %V) { |
| ; 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]] |
| ; |
| %frem = frem double %V, 1.000000e+00 |
| %trunc = fptrunc double %frem to float |
| ret float %trunc |
| } |
| |
| define float @test8(float %V) { |
| ; 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]] |
| ; |
| %fext = fpext float %V to double |
| %frem = frem double %fext, 1.000000e-01 |
| %trunc = fptrunc double %frem to float |
| ret float %trunc |
| } |
| |
| define half @test_fptrunc_fptrunc(double %V) { |
| ; CHECK-LABEL: @test_fptrunc_fptrunc( |
| ; CHECK-NEXT: [[T1:%.*]] = fptrunc double [[V:%.*]] to float |
| ; CHECK-NEXT: [[T2:%.*]] = fptrunc float [[T1]] to half |
| ; CHECK-NEXT: ret half [[T2]] |
| ; |
| %t1 = fptrunc double %V to float |
| %t2 = fptrunc float %t1 to half |
| ret half %t2 |
| } |
| |