[all-commits] [llvm/llvm-project] b6b492: [BOLT][RISCV] Set minimum function alignment to 2 ...

[Job Noorman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b6b492880f5ac6357d85ba2f3ad8e41fded1d97c
      https://github.com/llvm/llvm-project/commit/b6b492880f5ac6357d85ba2f3ad8e41fded1d97c
  Author: Job Noorman <jnoorman at igalia.com>
  Date:   2023-10-23 (Mon, 23 Oct 2023)

  Changed paths:
    M bolt/include/bolt/Core/BinaryFunction.h
    M bolt/include/bolt/Core/MCPlusBuilder.h
    M bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp
    M bolt/lib/Target/RISCV/RISCVMCPlusBuilder.cpp
    A bolt/test/RISCV/function-alignment.s

  Log Message:
  -----------
  [BOLT][RISCV] Set minimum function alignment to 2 for RVC (#69837)

In #67707, the minimum function alignment on RISC-V was set to 4. When
RVC (compressed instructions) is enabled, the minimum alignment can be
reduced to 2.

This patch implements this by delegating the choice of minimum alignment
to a new `MCPlusBuilder::getMinFunctionAlignment` function. This way,
the target-dependent code in `BinaryFunction` is minimized.