[llvm] [SDAG] Honor signed arguments in floating point libcalls (PR #109134)

[Nikita Popov via llvm-commits]

nikic wrote:

It looks like a number of existing tests fails:
```
^[_bk;t=1726690965886^G  LLVM :: CodeGen/PowerPC/ldexp-libcall.ll^M
^[_bk;t=1726690965886^G  LLVM :: CodeGen/PowerPC/ldexp.ll^M
^[_bk;t=1726690965886^G  LLVM :: CodeGen/X86/fold-int-pow2-with-fmul-or-fdiv.ll^M
```
You should update these as well, likely by rerunning update_llc_test_checks.py on them.

https://github.com/llvm/llvm-project/pull/109134