[all-commits] [llvm/llvm-project] 5f7715: Pass the cmdline aapcs bitfield options to cc1

[Ties Stuij via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5f7715d8780a1d16ad023995d282a7d94cb923a9
      https://github.com/llvm/llvm-project/commit/5f7715d8780a1d16ad023995d282a7d94cb923a9
  Author: Ties Stuij <ties.stuij at arm.com>
  Date:   2021-02-18 (Thu, 18 Feb 2021)

  Changed paths:
    M clang/lib/Driver/ToolChains/Clang.cpp
    A clang/test/Driver/arm-aarch64-bitfield-flags.c

  Log Message:
  -----------
  Pass the cmdline aapcs bitfield options to cc1

The following commits added commandline arguments to control following the Arm
Procedure Call Standard for certain volatile bitfield operations:
- https://reviews.llvm.org/D67399
- https://reviews.llvm.org/D72932

This commit fixes the oversight that these args weren't passed from the driver
to cc1 if appropriate.

Where *appropriate* means:
- `-faapcs-bitfield-width`: is the default, so won't be passed
- `-fno-aapcs-bitfield-width`: should be passed
- `-faapcs-bitfield-load`: should be passed

Differential Revision: https://reviews.llvm.org/D96784