[PATCH] D51792: [AArch64] Attempt to parse expressions as adr/adrp operands

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: t.p.northover, peter.smith, efriedma, olista01, jakehehrlich.
Herald added a reviewer: javed.absar.
Herald added a subscriber: kristof.beyls.

This tries to make use of evaluateAsRelocatable in AArch64AsmParser::classifySymbolRef to
parse more complex expressions as relocatable operands to ADR/ADRP's. It is hopefully
better than the existing code which only handles Symbol +- Constant.

Fixes PR38831


https://reviews.llvm.org/D51792

Files:
  lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  test/MC/AArch64/adr-badsyms.s
  test/MC/AArch64/adr.s

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