http://llvm.org/bugs/show_bug.cgi?id=22501
Bug ID: 22501
Summary: AA metadata is not properly updated during call slot
optimization
Product: new-bugs
Version: 3.6
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Blocks: 22374
Classification: Unclassified
Call slot optimization might update a call in a way that the set of things it
aliases with changes, but it doesn't update the AA metadata. This can lead to
various misoptimizations later on because of invalid NoAlias results.
We've hit such issues when we updated the LLVM version in the rust compiler to
3.6.
I submitted a patch for this at http://reviews.llvm.org/D7482
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