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| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-03-26 18:07:53 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-03-26 18:07:53 +0000 |
| commit | 742dbc1fc83f713e139a2745ebb34a97c11c43bd (patch) | |
| tree | 7b5f3c6e5d7841e156bc4f38f0ebde5f1a124a65 /lib/Support/Program.cpp | |
| parent | 675eb3b9ac547119f6db676ebdd172d40a797b1c (diff) | |
BasicAA: Only query twice if the result of the more general query was MayAlias
This is a compile time optimization. Before the patch we would do two traversals
on each call to aliasGEP - one with a set size parameter one with UnknownSize.
We can do better by first checking the result of the alias query with
UnknownSize.
Only if this one returns MayAlias do we query a second time using size and type.
This recovers an about 7% compile time regression on spec/ammp.
radar://12349960
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178045 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/Program.cpp')
0 files changed, 0 insertions, 0 deletions