On Tue, 7 Nov 2017, Kumar, Venkataramanan wrote:
The attached patch implements an RTL pass which splits generated FMA instruction into MUL/ADD sequence.
That seems wrong if the user explicitly asked for FMA in his program, unless you have a way to recognize which FMA instructions come from user calls to fma and which were invented by gcc. Why not disable the gimple transformation that creates FMA instead ?
* doc/invoke.texi (SPARC Options): Document -msplit-fma.
Sparc really? -- Marc Glisse
