[all-commits] [llvm/llvm-project] d96ea4: [AMDGPU][HIP] Improve opt-level handling

[Scott Linder via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d96ea47c75fdf4a62358eae49a0026bcf031bde6
      https://github.com/llvm/llvm-project/commit/d96ea47c75fdf4a62358eae49a0026bcf031bde6
  Author: Scott Linder <Scott.Linder at amd.com>
  Date:   2019-12-05 (Thu, 05 Dec 2019)

  Changed paths:
    M clang/lib/Driver/ToolChains/HIP.cpp
    M clang/test/Driver/hip-toolchain-mllvm.hip
    M clang/test/Driver/hip-toolchain-no-rdc.hip
    A clang/test/Driver/hip-toolchain-opt.hip
    M clang/test/Driver/hip-toolchain-rdc.hip

  Log Message:
  -----------
  [AMDGPU][HIP] Improve opt-level handling

Summary:
The HIP toolchain invokes `llc` without an explicit opt-level, meaning
it always uses the default (-O2). This makes it impossible to use -O1,
for example. The HIP toolchain also coerces -Os/-Oz to -O2 even when
invoking opt, and it coerces -Og to -O2 rather than -O1.

Forward the opt-level to `llc` as well as `opt`, and only coerce levels
where it is required.

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D70987