tree d8aa36794adc2421b2c93fea6cb6fa1189213f5a
parent 042c605b2e39872894d12a66f2e65cc371adcdd0
author Eli Friedman <efriedma@codeaurora.org> 1536709694 +0000
committer Eli Friedman <efriedma@codeaurora.org> 1536709694 +0000

[ScopDetection] Use addUnknown for calls in the AliasSetTracker.

The general-purpose add() now sometimes adds unexpected loop-variant
pointers to the AliasSetTracker, so certain loops would be rejected with
-polly-allow-modref-calls.  Use addUnknown() instead, which has the old
behavior.

I'm not completely convinced the resulting behavior is actually
correct: ScopDetection::isValidAccess seems to mostly ignore
"unknown" instructions in the AliasSetTracker.  But it's not any worse
than what was happening before.

Committing without pre-commit review to unbreak the buildbots; the
following tests were failing:

test/ScopInfo/mod_ref_access_pointee_arguments.ll
test/ScopInfo/mod_ref_read_pointee_arguments.ll
test/ScopInfo/multidim_2d_with_modref_call_2.ll


git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@342010 91177308-0d34-0410-b5e6-96231b3b80d8