| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| declare double @acos(double) willreturn |
| |
| ; Check that functions without any function attributes are simplified. |
| |
| define double @test_simplify_acos() { |
| ; CHECK-LABEL: @test_simplify_acos |
| %pi = call double @acos(double -1.000000e+00) |
| ; CHECK-NOT: call double @acos |
| ; CHECK: ret double 0x400921FB54442D18 |
| ret double %pi |
| } |
| |
| ; Check that we don't constant fold builtin functions. |
| |
| define double @test_acos_nobuiltin() { |
| ; CHECK-LABEL: @test_acos_nobuiltin |
| %pi = call double @acos(double -1.000000e+00) nobuiltin |
| ; CHECK: call double @acos(double -1.000000e+00) |
| ret double %pi |
| } |
| |
| ; Check that we don't constant fold strictfp results that require rounding. |
| |
| define double @test_acos_strictfp() strictfp { |
| ; CHECK-LABEL: @test_acos_strictfp |
| %pi = call double @acos(double -1.000000e+00) strictfp |
| ; CHECK: call double @acos(double -1.000000e+00) |
| ret double %pi |
| } |