shchenz added a comment. compiler-rt builtins library should not just undefining fma for PPC, right (see https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html)? If so, maybe we should at least first try not generating fma for soft-float at the first place where fmul + fadd is fused, like `tryEmitFMulAdd` in clang front end?
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