3 Commits

Author	SHA1	Message	Date
Peter Collingbourne	04ff122632	ELF: Do not create multiple thunks for the same virtual address. ... This avoids creating multiple thunks for symbols with aliases or which belong to ICF'd sections. This patch reduces the size of Chromium for Android by 260KB (0.8% of .text). Differential Revision: https://reviews.llvm.org/D44284 llvm-svn: 327154	2018-03-09 17:54:43 +00:00
Peter Smith	3c73a41128	[ELF] Optimize Arm PLT sequences ... A more efficient PLT sequence can be used when the distance between the .plt and the end of the .plt.got is less than 128 Megabytes, which is frequently true. We fall back to the old sequence when the offset is larger than 128 Megabytes. This gives us an alternative to forcing the longer entries with --long-plt as we gracefully fall back to it as needed. See ELF for the ARM Architecture Appendix A for details of the PLT sequence. Differential Revision: https://reviews.llvm.org/D41246 llvm-svn: 320987	2017-12-18 14:46:27 +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