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| author | Dan Gohman <gohman@apple.com> | 2009-05-19 02:15:55 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-05-19 02:15:55 +0000 |
| commit | 2649491f9cb18a66ee3bc545e5cc6c9e4e119d11 (patch) | |
| tree | 39ef603fc460591f064eae7d8a6aa0c54d31716a /llvm/lib/CodeGen | |
| parent | 1e059f608002e77a50c9616fb7b3685106571eaf (diff) | |
| download | bcm5719-llvm-2649491f9cb18a66ee3bc545e5cc6c9e4e119d11.tar.gz bcm5719-llvm-2649491f9cb18a66ee3bc545e5cc6c9e4e119d11.zip | |
Teach SCEVExpander to expand arithmetic involving pointers into GEP
instructions. It attempts to create high-level multi-operand GEPs,
though in cases where this isn't possible it falls back to casting
the pointer to i8* and emitting a GEP with that. Using GEP instructions
instead of ptrtoint+arithmetic+inttoptr helps pointer analyses that
don't use ScalarEvolution, such as BasicAliasAnalysis.
Also, make the AddrModeMatcher more aggressive in handling GEPs.
Previously it assumed that operand 0 of a GEP would require a register
in almost all cases. It now does extra checking and can do more
matching if operand 0 of the GEP is foldable. This fixes a problem
that was exposed by SCEVExpander using GEPs.
llvm-svn: 72093
Diffstat (limited to 'llvm/lib/CodeGen')
0 files changed, 0 insertions, 0 deletions
