[PATCH] D35998: [TableGen] AsmMatcher: fix OpIdx computation when HasOptionalOperands is true

[Nirav Dave via Phabricator via llvm-commits]

niravd added a comment.

I'm seeing it after this:

commit 343f60c4b20e14528fc519c83b7bbd9e2a48423b
Author: Ayal Zaks <ayal.zaks at intel.com>
Date:   Mon Jul 31 13:21:42 2017 +0000

  [LV] Avoid redundant operations manipulating masks

with the following failing tests:

  LLVM :: MC/AMDGPU/gfx7_asm_all.s
  LLVM :: MC/AMDGPU/gfx8_asm_all.s
  LLVM :: MC/AMDGPU/gfx9_asm_all.s
  LLVM :: MC/AMDGPU/sopk.s
  LLVM :: MC/AMDGPU/vintrp.s
  LLVM :: MC/AMDGPU/vop1-gfx9.s
  LLVM :: MC/AMDGPU/vop2.s
  LLVM :: MC/AMDGPU/vop3-convert.s


https://reviews.llvm.org/D35998