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| author | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2016-04-28 20:17:06 +0000 |
|---|---|---|
| committer | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2016-04-28 20:17:06 +0000 |
| commit | 55874cf02b40eaaf6b14ed1baec2fac9fe89390e (patch) | |
| tree | 499aaef5bfd550cefd80e589f4c09d7140eeab87 /llvm/lib/Support/DAGDeltaAlgorithm.cpp | |
| parent | 6cd5364556bad206ef922f1fe7ed84101ef44159 (diff) | |
| download | bcm5719-llvm-55874cf02b40eaaf6b14ed1baec2fac9fe89390e.tar.gz bcm5719-llvm-55874cf02b40eaaf6b14ed1baec2fac9fe89390e.zip | |
[RDF] Add option to keep dead phi nodes in DFG
Dead phi nodes are needed for code motion (such as copy propagation),
where a new use would be placed in a location that would be dominated
by a dead phi. Such a transformation is not legal for copy propagation,
and the existence of the phi would prevent it, but if the phi is not
there, it may appear to be valid.
llvm-svn: 267932
Diffstat (limited to 'llvm/lib/Support/DAGDeltaAlgorithm.cpp')
0 files changed, 0 insertions, 0 deletions
