[DAG] Make strictfp attribute only restricts for libm and make non-math optimizations possible (#165464)

the patch 

[Add strictfp attribute to prevent unwanted optimizations of libm
calls](https://reviews.llvm.org/D34163)


  add `I.isStrictFP()` into 
```
  if (!I.isNoBuiltin() && !I.isStrictFP() && !F->hasLocalLinkage() &&
        F->hasName() && LibInfo->getLibFunc(*F, Func) &&
        LibInfo->hasOptimizedCodeGen(Func)) 
```

it prevents the backend from optimizing even non-math libcalls such as
`strlen` and `memcmp` if a call has the strict floating-point attribute.
For example, it prevent converting strlen and memcmp to milicode call
__strlen and __memcmp.

0 files changed, 0 insertions, 0 deletions