[PATCH] D59266: [X86] Add support for {vex2}, {vex3}, and {evex} to the assembler to match gas. Use {evex} to improve the one our 32-bit AVX512 tests.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel.

These can be used to force the encoding used for instructions.

{vex2} will fail if the instruction is not VEX encoded, but otherwise won't do anything since we prefer vex2 when possible. Might need to skip use of the _REV MOV instructions for this too, but I haven't done that yet.

{vex3} will force the instruction to use the 3 byte VEX encoding or fail if there is no VEX form.

{evex} will force the instruction to use the EVEX version or fail if there is no EVEX version.


https://reviews.llvm.org/D59266

Files:
  lib/Target/X86/AsmParser/X86AsmParser.cpp
  lib/Target/X86/MCTargetDesc/X86BaseInfo.h
  lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp
  test/MC/X86/AVX-32.s
  test/MC/X86/AVX512F_SCALAR-32.s
  test/MC/X86/x86_errors.s

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