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3 Commits

Author SHA1 Message Date
Reid Kleckner aa46ed9278 [MS] Re-add support for the ARM interlocked bittest intrinscs 
Adds support for these intrinsics, which are ARM and ARM64 only:
  _interlockedbittestandreset_acq
  _interlockedbittestandreset_rel
  _interlockedbittestandreset_nf
  _interlockedbittestandset_acq
  _interlockedbittestandset_rel
  _interlockedbittestandset_nf

Refactor the bittest intrinsic handling to decompose each intrinsic into
its action, its width, and its atomicity.

llvm-svn: 334239
 2018-06-07 21:39:04 +00:00
Reid Kleckner 368d52b7e0 Implement bittest intrinsics generically for non-x86 platforms 
I tested these locally on an x86 machine by disabling the inline asm
codepath and confirming that it does the same bitflips as we do with the
inline asm.

Addresses code review feedback.

llvm-svn: 334059
 2018-06-06 01:35:08 +00:00
Reid Kleckner 1d9c249db5 Reimplement the bittest intrinsic family as builtins with inline asm 
We need to implement _interlockedbittestandset as a builtin for
windows.h, so we might as well do the whole family. It reduces code
duplication anyway.

Fixes PR33188, a long standing bug in our bittest implementation
encountered by Chakra.

llvm-svn: 333978
 2018-06-05 01:33:40 +00:00