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4 Commits

Author SHA1 Message Date
Manman Ren 0ed04fc9ab TBAA: handle scalar TBAA format and struct-path aware TBAA format. 
Remove the command line argument "struct-path-tbaa" since we should not depend
on command line argument to decide which format the IR file is using. Instead,
we check the first operand of the tbaa tag node, if it is a MDNode, we treat
it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA
format.

When clang starts to use struct-path aware TBAA format no matter whether
struct-path-tbaa is no, and we can auto-upgrade existing bc files, the support
for scalar TBAA format can be dropped.

Existing testing cases are updated to use the struct-path aware TBAA format.

llvm-svn: 191538
 2013-09-27 18:34:27 +00:00
Bill Wendling cd6df16cb4 FileCheck-ize these tests. Harden some of them. 
llvm-svn: 155432
 2012-04-24 09:15:38 +00:00
Dan Gohman 4deda530c2 Add another rdar number. 
llvm-svn: 124125
 2011-01-24 17:54:01 +00:00
Dan Gohman 44da55b7be Teach BasicAA to return PartialAlias in cases where both pointers 
are pointing to the same object, one pointer is accessing the entire
object, and the other is access has a non-zero size. This prevents
TBAA from kicking in and saying NoAlias in such cases.

llvm-svn: 123775
 2011-01-18 21:16:06 +00:00