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| author | Marcin Koscielnicki <koriakin@0x04.net> | 2016-04-24 13:57:49 +0000 |
|---|---|---|
| committer | Marcin Koscielnicki <koriakin@0x04.net> | 2016-04-24 13:57:49 +0000 |
| commit | aef3b5b5e2d8bcb321832859464ff11100811609 (patch) | |
| tree | 9d92031439572df7c0aa1f07b95d2f6b22345b4f /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | 7eedee938f839680aad4fcb831bd0c77b7025f76 (diff) | |
| download | llvm-aef3b5b5e2d8bcb321832859464ff11100811609.zip llvm-aef3b5b5e2d8bcb321832859464ff11100811609.tar.gz llvm-aef3b5b5e2d8bcb321832859464ff11100811609.tar.bz2 | |
[SystemZ] [SSP] Add support for LOAD_STACK_GUARD.
This fixes PR22248 on s390x. The previous attempt at this was D19101,
which was before LOAD_STACK_GUARD existed. Compared to the previous
version, this always emits a rather ugly block of 4 instructions, involving
a thread pointer load that can't be shared with other potential users.
However, this is necessary for SSP - spilling the guard value (or thread
pointer used to load it) is counter to the goal, since it could be
overwritten along with the frame it protects.
Differential Revision: http://reviews.llvm.org/D19363
llvm-svn: 267340
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
0 files changed, 0 insertions, 0 deletions