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| author | James Molloy <james.molloy@arm.com> | 2015-11-05 15:21:58 +0000 |
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| committer | James Molloy <james.molloy@arm.com> | 2015-11-05 15:21:58 +0000 |
| commit | bef6e431072c125c092fefd9f9ee14a2a01e5c6a (patch) | |
| tree | 0792c3493f76cbbca975515c20abf7bf722c9d01 /lldb/packages/Python/lldbsuite/test/functionalities/thread/TestNumThreads.py | |
| parent | 8f3a6aeadb9dbd710fe941dbc863a8bbc5389a4b (diff) | |
| download | bcm5719-llvm-bef6e431072c125c092fefd9f9ee14a2a01e5c6a.tar.gz bcm5719-llvm-bef6e431072c125c092fefd9f9ee14a2a01e5c6a.zip | |
[ARM] Compute known bits for ARMISD::CMOV
We can conservatively know that CMOV's known bits are the intersection of known bits for each of its operands. This helps PerformCMOVToBFICombine find more opportunities.
I tried hard to create a testcase for this and failed - we have to sufficiently confuse DAG.computeKnownBits which can see through all the cheap tricks I tried to narrow my larger testcase down :(
This code is actually exercised in CodeGen/ARM/bfi.ll, there's just no functional difference because DAG.computeKnownBits gets the right answer in that case.
llvm-svn: 252168
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/functionalities/thread/TestNumThreads.py')
0 files changed, 0 insertions, 0 deletions
