| Issue |
132503
|
| Summary |
Inconsistency in sinh(const), cosh(const), and tanh(const) optimizations with -ffast-math
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
k-arrows
|
Consider the following test case.
https://godbolt.org/z/Ecd865P97
```cpp
#include <cmath>
double f1() {
return std::sinh(0.);
}
double f2() {
return std::cosh(0.);
}
double f3() {
return std::tanh(0.);
}
```
The optimization results for `std::sinh(0.)`, `std::cosh(0.)`, and `std::tanh(0.)` differ between `-O1` and `-O1 -ffast-math`. Specifically, when `-ffast-math` is enabled, `sinh(0.)` and `cosh(0.)` are not folded into constants but instead call the corresponding library functions. This suggests that `-ffast-math` is restricting optimization rather than enhancing it.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
