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| author | Alex Bradbury <asb@lowrisc.org> | 2018-08-17 14:03:37 +0000 |
|---|---|---|
| committer | Alex Bradbury <asb@lowrisc.org> | 2018-08-17 14:03:37 +0000 |
| commit | 3291f9aa8168408ce5ef4757012c06c196a72c41 (patch) | |
| tree | 250f4e4c3d2990d0ecfb1c1bb086e0e9febd3ddc /lldb/packages/Python/lldbsuite/test/python_api/thread/main2.cpp | |
| parent | 1962621a7e3350ed3677645dba6d0f20a765db4f (diff) | |
| download | bcm5719-llvm-3291f9aa8168408ce5ef4757012c06c196a72c41.tar.gz bcm5719-llvm-3291f9aa8168408ce5ef4757012c06c196a72c41.zip | |
[AtomicExpandPass] Widen partword atomicrmw or/xor/and before tryExpandAtomicRMW
This patch performs a widening transformation of bitwise atomicrmw
{or,xor,and} and applies it prior to tryExpandAtomicRMW. This operates
similarly to convertCmpXchgToIntegerType. For these operations, the i8/i16
atomicrmw can be implemented in terms of the 32-bit atomicrmw by appropriately
manipulating the operands. There is no functional change for the handling of
partword or/xor, but the transformation for partword 'and' is new.
The advantage of performing this transformation early is that the same
code-path can be used regardless of the approach used to expand the atomicrmw
(AtomicExpansionKind). i.e. the same logic is used for
AtomicExpansionKind::CmpXchg and can also be used by the intrinsic-based
expansion in D47882.
Differential Revision: https://reviews.llvm.org/D48129
llvm-svn: 340027
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/python_api/thread/main2.cpp')
0 files changed, 0 insertions, 0 deletions
