[llvm-dev] Maintaining TBAA information in stack coloring pass

[Hiroshi 7 Inoue via llvm-dev]

Dear all,

While investigating recent failures in bootstrap on ppc64le buildbot, I
found that the current stack coloring pass does not regard TBAA information
when merging two allocas of different types (Actually there is a FIXME
comment on handling of TBAA information in StackColoring.cpp)
Although the current failures are observed only on ppc64le, the cause of
failures seems to be a platform-neutral issue and other platforms can
suffer from similar problems.

I submitted a work-in-progress patch in Phabricator to resolve this issue.
https://reviews.llvm.org/D35907
Any suggestions or comments would be truly appreciated.

Regards,
Hiroshi

-----
Hiroshi Inoue <inouehrs at jp.ibm.com>
IBM Research - Tokyo
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