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| author | Oliver Stannard <oliver.stannard@arm.com> | 2016-07-25 09:21:56 +0000 |
|---|---|---|
| committer | Oliver Stannard <oliver.stannard@arm.com> | 2016-07-25 09:21:56 +0000 |
| commit | 1224c809f195e3278fb5d4ac3da33720edcfeffc (patch) | |
| tree | 6ecc38d4f26e08ed0d85ec51bc419d898906e8de /llvm/test/CodeGen/Generic/add-with-overflow-128.ll | |
| parent | 68c71cd1e4a35baabb39c7b8bc77d0fbdd4bdb15 (diff) | |
| download | bcm5719-llvm-1224c809f195e3278fb5d4ac3da33720edcfeffc.tar.gz bcm5719-llvm-1224c809f195e3278fb5d4ac3da33720edcfeffc.zip | |
[libunwind][ARM] Add support for Thumb1 targets
The Thumb1 version of the code for saving and restoring the unwind
context has a few bugs which prevent it from working:
* It uses the STM instruction without writeback, which is not valid for Thumb1
(It was introduced in Thumb2).
* It only saves/restores the low 8 registers, the sp and the lr, so if a
program uses r8-r12 they will not be correctly restored when throwing an
exception.
There aren't currently any Thumb1 build-bots to test this, but we have
been successfully running the libc++abi and libc++ test suites on
Cortex-M0 models, as well as some other test suites that use C++
exceptions on a downstream version of libunwind with this patch applied.
Differential Revision: https://reviews.llvm.org/D22292
llvm-svn: 276625
Diffstat (limited to 'llvm/test/CodeGen/Generic/add-with-overflow-128.ll')
0 files changed, 0 insertions, 0 deletions
