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Commit 3f85134d authored by Chen Zheng's avatar Chen Zheng
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[PowerPC] implement target hook isProfitableToHoist 

On Powerpc fma is faster than fadd + fmul for some types,
(PPCTargetLowering::isFMAFasterThanFMulAndFAdd). we should implement target
hook isProfitableToHoist to prevent simplifyCFGpass from breaking fma
pattern by hoisting fmul to predecessor block.

Reviewed By: nemanjai

Differential Revision: https://reviews.llvm.org/D76207
parent f528df8e
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