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3 Commits

Author SHA1 Message Date
Nikita Popov
65fd034b95 [FunctionAttrs] Infer willreturn for functions without loops 
If a function doesn't contain loops and does not call non-willreturn
functions, then it is willreturn. Loops are detected by checking
for backedges in the function. We don't attempt to handle finite
loops at this point.

Differential Revision: https://reviews.llvm.org/D94633
 2021-01-21 20:29:33 +01:00
Arthur Eubanks
2ca6c422d2 [FunctionAttrs] Rename functionattrs -> function-attrs 
To match NewPM pass name, and also for readability.
Also rename rpo-functionattrs -> rpo-function-attrs while we're here.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D84694
 2020-07-28 09:09:13 -07:00
Brian Homerding
b4b21d807e Add, and infer, a nofree function attribute 
This patch adds a function attribute, nofree, to indicate that a function does
not, directly or indirectly, call a memory-deallocation function (e.g., free,
C++'s operator delete).

Reviewers: jdoerfert

Differential Revision: https://reviews.llvm.org/D49165

llvm-svn: 365336
 2019-07-08 15:57:56 +00:00