[all-commits] [llvm/llvm-project] b7ac16: [clang] Default x86-64's medium code model -mlarge...

[Arthur Eubanks via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b7ac16c70faf7274119f393797ce89c054346f48
      https://github.com/llvm/llvm-project/commit/b7ac16c70faf7274119f393797ce89c054346f48
  Author: Arthur Eubanks <aeubanks at google.com>
  Date:   2023-10-04 (Wed, 04 Oct 2023)

  Changed paths:
    M clang/include/clang/Driver/Options.td
    M clang/test/CodeGen/large-data-threshold.c

  Log Message:
  -----------
  [clang] Default x86-64's medium code model -mlarge-data-threshold to 65535 (#67506)

This matches gcc.

This means that by default, under x86-64's medium code model we treat
globals < 2^16 bytes as "small data" and globals >= 2^16 bytes as "large
data".

The previous clang behavior of treating all data as "large data" can be
set with `-mlarge-data-threshold=0`.

See
https://discourse.llvm.org/t/rfc-matching-gccs-mlarge-data-threshold-for-x86-64s-medium-code-model/73727.