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3 Commits

Author SHA1 Message Date
Fangrui Song b6772b86e2 [ELF] Move `// REQUIRES:` line to the top 
llvm-svn: 335676
 2018-06-26 22:20:04 +00:00
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 75030b6d56 [ELF] Introduce range extension thunks for ARM 
This change adds initial support for range extension thunks. All thunks must
be created within the first pass so some corner cases are not supported. A
follow up patch will add support for multiple passes.

With this change the existing tests arm-branch-error.s and
arm-thumb-branch-error.s now no longer fail with an out of range branch.
These have been renamed and tests added for the range extension thunk.

Differential Revision: https://reviews.llvm.org/D34691

llvm-svn: 316752
 2017-10-27 09:04:11 +00:00