[all-commits] [llvm/llvm-project] 7917b1: [CodeGen] Always expand division larger than i128

[Nikita Popov via All-commits]

  Branch: refs/heads/release/16.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 7917b15d9ef6b5e34936cd02d47c2c6258d8eeb3
      https://github.com/llvm/llvm-project/commit/7917b15d9ef6b5e34936cd02d47c2c6258d8eeb3
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-03-02 (Thu, 02 Mar 2023)

  Changed paths:
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    A llvm/test/CodeGen/Mips/idiv_large.ll
    A llvm/test/CodeGen/PowerPC/idiv_large.ll
    A llvm/test/CodeGen/RISCV/idiv_large.ll

  Log Message:
  -----------
  [CodeGen] Always expand division larger than i128

Default MaxDivRemBitWidthSupported to 128, so that divisions larger
than 128 bits are always expanded, without requiring additional
configuration from the target.

Note that this may still emit calls to __udivti3 on 32-bit targets,
which likely don't have an implementation of that builtin. However,
I believe this is sufficient to fix
https://github.com/llvm/llvm-project/issues/60531, because Zig must
already be defining those builtins.

Differential Revision: https://reviews.llvm.org/D144871

(cherry picked from commit ddccc5ba4479a36dd4821f0948e118438fbf2e56)