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Simon Pilgrim
91de08f078
Improves codegen demonstrated by D60512 - instructions represented by X86ISD::PERMV/PERMV3 can never memory fold the operand used for their index register. This patch updates the 'isUseOfShuffle' helper into the more capable 'isFoldableUseOfShuffle' that recognises that the op is used for a X86ISD::PERMV/PERMV3 index mask and can't be folded - allowing us to use broadcast/subvector-broadcast ops to reduce the size of the mask constant pool data. Differential Revision: https://reviews.llvm.org/D60562 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358516 91177308-0d34-0410-b5e6-96231b3b80d8
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