llvm-project

Commit Graph

Author	SHA1	Message	Date
George Burgess IV	3f08914e7e	[Analysis] Centralize objectsize lowering logic. We're currently doing nearly the same thing for @llvm.objectsize in three different places: two of them are missing checks for overflow, and one of them could subtly break if InstCombine gets much smarter about removing alloc sites. Seems like a good idea to not do that. llvm-svn: 290214	2016-12-20 23:46:36 +00:00
Petar Jovanovic	644b8c1a5d	Calculate __builtin_object_size when pointer depends on a condition This patch fixes calculating of builtin_object_size if it depends on a condition. Before this patch compiler did not know how to calculate the object size when it finds a condition that cannot be eliminated. This patch enables calculating of builtin_object_size even in case when condition cannot be eliminated by choosing minimum or maximum value as a result from condition. Choosing minimum or maximum value from condition is based on the second argument of __builtin_object_size function. Patch by Strahinja Petrovic. Differential Revision: http://reviews.llvm.org/D18438 llvm-svn: 266193	2016-04-13 12:25:25 +00:00

Author

SHA1

Message

Date

George Burgess IV

3f08914e7e

[Analysis] Centralize objectsize lowering logic.

We're currently doing nearly the same thing for @llvm.objectsize in
three different places: two of them are missing checks for overflow,
and one of them could subtly break if InstCombine gets much smarter
about removing alloc sites. Seems like a good idea to not do that.

llvm-svn: 290214

2016-12-20 23:46:36 +00:00

Petar Jovanovic

644b8c1a5d

Calculate __builtin_object_size when pointer depends on a condition

This patch fixes calculating of builtin_object_size if it depends on a
condition. Before this patch compiler did not know how to calculate the
object size when it finds a condition that cannot be eliminated.
This patch enables calculating of builtin_object_size even in case when
condition cannot be eliminated by choosing minimum or maximum value as a
result from condition. Choosing minimum or maximum value from condition
is based on the second argument of __builtin_object_size function.

Patch by Strahinja Petrovic.

Differential Revision: http://reviews.llvm.org/D18438

llvm-svn: 266193

2016-04-13 12:25:25 +00:00

2 Commits