[all-commits] [llvm/llvm-project] fb92cf: [RISCV] Pre-commit tests for D101342

[Jessica Clarke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fb92cf92080d34f0bb0b2b0120086ee520f624b8
      https://github.com/llvm/llvm-project/commit/fb92cf92080d34f0bb0b2b0120086ee520f624b8
  Author: Jessica Clarke <jrtc27 at jrtc27.com>
  Date:   2021-05-04 (Tue, 04 May 2021)

  Changed paths:
    A llvm/test/CodeGen/RISCV/atomic-signext.ll

  Log Message:
  -----------
  [RISCV] Pre-commit tests for D101342

These tests show inefficient sign extension for AMOs on RISC-V. The
normal CodeGen tests use anyext return values, but if marked signext
then we end up generating unnecessary sign extension instructions. This
can be seen when compiling C that returns an i32 (signed or unsigned),
where the calling convention results in a signext return value.