Tim Northover 8f2a85e099 IR: add "cmpxchg weak" variant to support permitted failure. ... This commit adds a weak variant of the cmpxchg operation, as described in C++11. A cmpxchg instruction with this modifier is permitted to fail to store, even if the comparison indicated it should. As a result, cmpxchg instructions must return a flag indicating success in addition to their original iN value loaded. Thus, for uniformity *all* cmpxchg instructions now return "{ iN, i1 }". The second flag is 1 when the store succeeded. At the DAG level, a new ATOMIC_CMP_SWAP_WITH_SUCCESS node has been added as the natural representation for the new cmpxchg instructions. It is a strong cmpxchg. By default this gets Expanded to the existing ATOMIC_CMP_SWAP during Legalization, so existing backends should see no change in behaviour. If they wish to deal with the enhanced node instead, they can call setOperationAction on it. Beware: as a node with 2 results, it cannot be selected from TableGen. Currently, no use is made of the extra information provided in this patch. Test updates are almost entirely adapting the input IR to the new scheme. Summary for out of tree users: ------------------------------ + Legacy Bitcode files are upgraded during read. + Legacy assembly IR files will be invalid. + Front-ends must adapt to different type for "cmpxchg". + Backends should be unaffected by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210903 91177308-0d34-0410-b5e6-96231b3b80d8		2014-06-13 14:24:07 +00:00
..
ADT	Convert StringMapEntry::Create to use StringRef instead of start/end pointers. Simpliies all in tree call sites. No functional change.	2014-06-11 05:35:56 +00:00
Analysis	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
AsmParser
Bitcode	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
CodeGen	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
Config	config.h: remove clang-specific macro definitions	2014-06-06 04:50:41 +00:00
DebugInfo	[DWARF parser] Teach DIContext to fetch short (non-linkage) function names for a given address.	2014-05-17 00:07:48 +00:00
ExecutionEngine	Don't use 'using std::error_code' in include/llvm.	2014-06-12 21:46:39 +00:00
IR	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
IRReader
LineEditor
Linker
LTO
MC	Avoid in-class initializer from r210747	2014-06-12 04:27:37 +00:00
Object	Don't use 'using std::error_code' in include/llvm.	2014-06-12 21:46:39 +00:00
Option	Options: Use erase_if to remove Args from the list.	2014-05-18 15:14:13 +00:00
ProfileData	Don't use 'using std::error_code' in include/llvm.	2014-06-12 21:46:39 +00:00
Support	Don't use 'using std::error_code' in include/llvm.	2014-06-12 21:46:39 +00:00
TableGen	Fix some misplaced spaces around 'override'	2014-05-24 20:19:40 +00:00
Target	Condition codes AL and NV are invalid in the aliases that use	2014-06-10 13:11:35 +00:00
Transforms	Remove sanitizer blacklist from ASan/TSan/MSan function passes.	2014-06-02 18:08:27 +00:00
CMakeLists.txt	[modules] Add module maps for LLVM. These are not quite ready for prime-time	2014-05-21 02:46:14 +00:00
InitializePasses.h	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
LinkAllIR.h
LinkAllPasses.h	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
module.modulemap	[modules] Add module maps for LLVM. These are not quite ready for prime-time	2014-05-21 02:46:14 +00:00
module.modulemap.build	[modules] Add module maps for LLVM. These are not quite ready for prime-time	2014-05-21 02:46:14 +00:00
Pass.h	Revert "[PM] Add pass run listeners to the pass manager."	2014-05-15 17:49:20 +00:00
PassAnalysisSupport.h
PassInfo.h	Remove pimpl class from PassRegistry.	2014-06-12 16:06:51 +00:00
PassManager.h
PassRegistry.h	Remove pimpl class from PassRegistry.	2014-06-12 16:06:51 +00:00
PassSupport.h	Remove pimpl class from PassRegistry.	2014-06-12 16:06:51 +00:00