[all-commits] [llvm/llvm-project] 5b551b: [HIP] Fix default output file for -E

[Yaxun (Sam) Liu via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 5b551b79d3bba5a8a282bf5f72c7baaccf925870
      https://github.com/llvm/llvm-project/commit/5b551b79d3bba5a8a282bf5f72c7baaccf925870
  Author: Yaxun (Sam) Liu <yaxun.liu at amd.com>
  Date:   2020-10-04 (Sun, 04 Oct 2020)

  Changed paths:
    M clang/lib/Driver/Driver.cpp
    M clang/test/Driver/hip-output-file-name.hip

  Log Message:
  -----------
  [HIP] Fix default output file for -E

By convention the default output file for -E is "-" (stdout).
This is expected by tools like ccache, which uses output
of -E to determine if a file and its dependence has changed.

Currently clang does not use stdout as default output file for -E
for HIP, which causes ccache not working.

This patch fixes that.

Differential Revision: https://reviews.llvm.org/D88730