llvm-project

Commit Graph

Author	SHA1	Message	Date
Peter Collingbourne	015d30c807	ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846	2018-03-29 22:43:52 +00:00
Peter Smith	6c9df3fce5	[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754	2017-10-27 09:07:10 +00:00

Author

SHA1

Message

Date

Peter Collingbourne

015d30c807

ELF: Add support for short thunks on ARM.

A short thunk uses a direct branch (b or b.w) instruction, and is used
when the target has the same thumbness as the thunk and is within
direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the
size of Chromium for Android's .text section by around 160KB.

Differential Revision: https://reviews.llvm.org/D44963

llvm-svn: 328846

2018-03-29 22:43:52 +00:00

Peter Smith

6c9df3fce5

[ELF] Add support for multiple passes to createThunks()

This change allows Thunks to be added on multiple passes. To do this we must
merge only the thunks added in each pass, and deal with thunks that have
drifted out of range of their callers.

A thunk may end out of range of its caller if enough thunks are added in
between the caller and the thunk. To handle this we create another thunk.

Differential Revision: https://reviews.llvm.org/D34692

llvm-svn: 316754

2017-10-27 09:07:10 +00:00

2 Commits