[PATCH] D158589: [MIPS] Add handing of forbidden slot when IR with inline asm

[Ying Huang via Phabricator via llvm-commits]

yingopq updated this revision to Diff 558070.
yingopq added a comment.

Add a global variable 'CurForbiddenSlotAttr' to save current instruction`s forbidden slot and whether set reorder.
This is the judgment condition for whether to add nop.  
We would add a couple of '.set noreorder' and '.set reorder' to wrap the current instruction and the next instruction.
Then we can get previous instruction`s forbidden slot attribute and whether set reorder by 'CurForbiddenSlotAttr'.
If previous instruction has forbidden slot and .set reorder is active and current instruction is CTI.  Then emit a NOP
after it.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158589/new/

https://reviews.llvm.org/D158589

Files:
  llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
  llvm/test/CodeGen/Mips/llvm-ir/forbidden-slot-ir.ll
  llvm/test/MC/Mips/forbidden-slot.s
  llvm/test/MC/Mips/mips32r6/relocations.s
  llvm/test/MC/Mips/mips64r6/relocations.s
  llvm/test/MC/Mips/relocation.s

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