[all-commits] [llvm/llvm-project] 3787fb: [RISCV] Enable merging of external globals by defa...

[Alex Bradbury via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3787fbf0402b4e03e316c13231f8873769701250
      https://github.com/llvm/llvm-project/commit/3787fbf0402b4e03e316c13231f8873769701250
  Author: Alex Bradbury <asb at igalia.com>
  Date:   2024-12-11 (Wed, 11 Dec 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
    M llvm/test/CodeGen/RISCV/global-merge-minsize-smalldata-nonzero.ll
    M llvm/test/CodeGen/RISCV/global-merge-minsize-smalldata-zero.ll
    M llvm/test/CodeGen/RISCV/global-merge-minsize.ll
    M llvm/test/CodeGen/RISCV/global-merge-offset.ll
    M llvm/test/CodeGen/RISCV/global-merge.ll

  Log Message:
  -----------
  [RISCV] Enable merging of external globals by default (#117880)

This follows up #115495 by enabling merging of external globals by
default, which had been left as a next step in order to make the
previous change more incremental and so we can more easily narrow down
on any identified regressions.

Enabling merging of external globals matches what Arm does (for non
mach-o targets), though AArch64 doesn't as there were [some
concerns](https://reviews.llvm.org/D61947) it might cause regressions in
some cases.

See https://github.com/llvm/llvm-project/pull/117880 for benchmark figures and discussion.



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