llvm-project

Commit Graph

Author	SHA1	Message	Date
Evgeniy Stepanov	12de7b2446	Change section flag character for SHF_LINK_ORDER to "o". GAS uses "m" as a compatibility alias for "M" (SHF_MERGE). "o" is free, except on ia64, where it already means SHF_LINK_ORDER. llvm-svn: 299479	2017-04-04 22:35:08 +00:00
Evgeniy Stepanov	51c962f72e	Add !associated metadata. This is an ELF-specific thing that adds SHF_LINK_ORDER to the global's section pointing to the metadata argument's section. The effect of that is a reverse dependency between sections for the linker GC. !associated does not change the behavior of global-dce. The global may also need to be added to llvm.compiler.used. Since SHF_LINK_ORDER is per-section, !associated effectively enables fdata-sections for the affected globals, the same as comdats do. Differential Revision: https://reviews.llvm.org/D29104 llvm-svn: 298157	2017-03-17 22:17:24 +00:00

Author

SHA1

Message

Date

Evgeniy Stepanov

12de7b2446

Change section flag character for SHF_LINK_ORDER to "o".

GAS uses "m" as a compatibility alias for "M" (SHF_MERGE).

"o" is free, except on ia64, where it already means SHF_LINK_ORDER.

llvm-svn: 299479

2017-04-04 22:35:08 +00:00

Evgeniy Stepanov

51c962f72e

Add !associated metadata.

This is an ELF-specific thing that adds SHF_LINK_ORDER to the global's section
pointing to the metadata argument's section. The effect of that is a reverse dependency
between sections for the linker GC.

!associated does not change the behavior of global-dce. The global
may also need to be added to llvm.compiler.used.

Since SHF_LINK_ORDER is per-section, !associated effectively enables
fdata-sections for the affected globals, the same as comdats do.

Differential Revision: https://reviews.llvm.org/D29104

llvm-svn: 298157

2017-03-17 22:17:24 +00:00

2 Commits