[PATCH] D11147: [ARM] Changes to Arch/CPU handling to help with -Wa, -mfpu etc. (nfc)

[Renato Golin]

rengolin created this revision.
rengolin added reviewers: mcrosier, kristof.beyls, jmolloy.
rengolin added a subscriber: cfe-commits.
rengolin set the repository for this revision to rL LLVM.
Herald added subscribers: rengolin, aemerson.

To be able to handle -Wa, options in the assembler (ClangAs), we need to
make the handling of options based on the value of the options, not direct
Arguments from the list, since the list is immutable.

No functional change in this patch, but this allows validating of -Wa,-mfpu
and friends in the same way we validate -mfpu and friends, *just* for the
assembler.

Prepares for the PR20700 fix.

Repository:
  rL LLVM

http://reviews.llvm.org/D11147

Files:
  lib/Driver/ToolChain.cpp
  lib/Driver/Tools.cpp
  lib/Driver/Tools.h

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