[PATCH] D148315: [RISCV] Modify arch string parsing order according to latest riscv spec

[Alex Bradbury via Phabricator via cfe-commits]

asb added a comment.

I'm starting to think we should just remove the ordering rules for z/s/x altogether when parsing arch strings I see that gcc 12.2.0 actually requires s and then z:

  [asb at purge ~]$ riscv64-linux-gnu-gcc -march=rv64imafdc_svinval_zicbom t.c -c
  [asb at purge ~]$ riscv64-linux-gnu-gcc -march=rv64imafdc_zicbom_svinval t.c -c
  riscv64-linux-gnu-gcc: error: '-march=rv64imafdc_zicbom_svinval': unexpected ISA string at end: 'svinval'

So ISA naming strings aren't easily portable between clang and GCC right now, even if the same extension names are recognised.


Repository:
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https://reviews.llvm.org/D148315