[Bug target/90103] ICE building Glibc's e_atan2f.c with -O2 -mcpu=hs38_linux -frounding-math

[claziss at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90103

--- Comment #1 from Claudiu Zissulescu <claziss at gmail dot com> ---
Probably,this patch needs to be backported:

    [ARC] Update fma expansions.

    Accept at most a single constant for fma patterns.

    gcc/
    2018-03-21  Claudiu Zissulescu  <claz...@synopsys.com>

            * config/arc/fpu.md (fmasf4): Force operand to register.
            (fnmasf4): Likewise.

    gcc/testsuite
    2018-03-21  Claudiu Zissulescu  <claz...@synopsys.com>

            * gcc.target/arc/fma-1.c: New test.

SVN: 261543