[PATCH] D139412: [AMDGPU] Change handling of s_endpgm's optional operand. NFC.

[Jay Foad via Phabricator via llvm-commits]

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s_endpgm is a special SOPP instruction in that its operand is optional
and if it is not present then we don't want to print a space after the
mnemonic.

Previously this was handled by defaulting real_name to the mnemonic with
a trailing space, and having s_endpgm override it to be the mnemonic
with no trailing space.

This patch implements a different approach where all SOPP instructions
except for s_endpgm include a leading space in their AsmOperands.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139412

Files:
  llvm/lib/Target/AMDGPU/SOPInstructions.td

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