> > Agreed - Legal was a poor choice of terms. I don't know if we want to > check TLI.isOperationLegal(...) though - an llvm.fma.* call (which is what > we lower to) will always be legal... >
Owen pointed out that I'm finding new and interesting ways to abuse the term 'legal' here. To clarify: If isFMACheap returns true we should legalize the llvm.fmuladd.* to an llvm.fma.* and leave it to the existing legalization code to turn the llvm.fma.* into something sane for the target. - Lang.
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