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f44fb33098
This is the alternative approach to D96931. In LTO, for each module with inlineasm block, prepend directive ".lto_discard <sym>, <sym>*" to the beginning of the inline asm. ".lto_discard" is both a module inlineasm block marker and (optionally) provides a list of symbols to be discarded. In MC while emitting for inlineasm, discard symbol binding & symbol definitions according to ".lto_disard". Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D98762