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
..
2006-12-11-Cast-ConstExpr.ll
2009-06-11-FirstClassAggregateConstant.ll
aggregateInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
aggregateInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
arm32_neon_vcnt_upgrade.ll	More replacing of target-dependent intrinsics with target-indepdent	2012-07-18 00:02:16 +00:00
atomic.ll	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
attributes-3.3.ll	Make .bc en/decoding of AttrKind stable	2013-07-26 04:16:55 +00:00
attributes-3.3.ll.bc	Make .bc en/decoding of AttrKind stable	2013-07-26 04:16:55 +00:00
attributes.ll	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
binaryFloatInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
binaryFloatInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
binaryIntInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
binaryIntInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
bitwiseInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
bitwiseInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
blockaddress.ll	BitcodeReader: Correctly insert blockaddress constant referring to a already parsed function.	2012-09-21 14:34:31 +00:00
calling-conventions.3.2.ll	Ensure bitcode encoding of calling conventions stays stable. Patch by Boaz Ouriel.	2013-12-22 07:51:53 +00:00
calling-conventions.3.2.ll.bc	Ensure bitcode encoding of calling conventions stays stable. Patch by Boaz Ouriel.	2013-12-22 07:51:53 +00:00
case-ranges-3.3.ll	Revert patches to add case-range support for PR1255.	2013-09-09 19:14:35 +00:00
case-ranges-3.3.ll.bc	Revert patches to add case-range support for PR1255.	2013-09-09 19:14:35 +00:00
cmpxchg-upgrade.ll	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00
cmpxchg-upgrade.ll.bc	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00
conversionInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
conversionInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
deprecated-linker_private-linker_private_weak.ll	AsmParser: add a warning for compatibility parsing	2014-04-05 22:42:53 +00:00
drop-debug-info.ll	Update testing case for r200806.	2014-02-04 23:53:12 +00:00
extractelement.ll	Use -disable-output and to suppress output and don't use a temporary file unless we need one.	2013-08-20 23:00:25 +00:00
flags.ll
function-encoding-rel-operands.ll	Change encoding of instruction operands in bitcode binaries to be relative	2012-10-11 20:20:40 +00:00
global-variables.3.2.ll	Ensure bitcode encoding of global variable attributes stays stable. Patch by Boaz Ouriel.	2013-12-15 11:50:45 +00:00
global-variables.3.2.ll.bc	Ensure bitcode encoding of global variable attributes stays stable. Patch by Boaz Ouriel.	2013-12-15 11:50:45 +00:00
invalid.ll	Change BitcodeReader to use error_code instead of bool + string.	2013-11-04 16:16:24 +00:00
invalid.ll.bc	Use a larger invalid attribute bitcode number	2013-10-31 19:12:36 +00:00
linkage-types-3.2.ll	Remove the linker_private and linker_private_weak linkages.	2014-03-13 23:18:37 +00:00
linkage-types-3.2.ll.bc	Ensure bitcode encoding of linkage types stays stable. Patch by Boaz Ouriel	2013-12-01 10:16:35 +00:00
local-linkage-default-visibility.3.4.ll	IR: Don't allow non-default visibility on local linkage	2014-05-07 22:57:20 +00:00
local-linkage-default-visibility.3.4.ll.bc	IR: Don't allow non-default visibility on local linkage	2014-05-07 22:57:20 +00:00
memInstructions.3.2.ll	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
memInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-03-02 15:26:36 +00:00
metadata-2.ll	Use -disable-output and to suppress output and don't use a temporary file unless we need one.	2013-08-20 23:00:25 +00:00
metadata.ll	Use -disable-output and to suppress output and don't use a temporary file unless we need one.	2013-08-20 23:00:25 +00:00
miscInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-03-02 15:26:36 +00:00
miscInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-03-02 15:26:36 +00:00
null-type.ll	Change BitcodeReader to use error_code instead of bool + string.	2013-11-04 16:16:24 +00:00
null-type.ll.bc
old-aliases.ll	Allow alias to point to an arbitrary ConstantExpr.	2014-06-03 02:41:57 +00:00
old-aliases.ll.bc	Fix most of PR10367.	2014-05-16 19:35:39 +00:00
pr18704.ll	All new elements except the last one initialized to NULL. Ideally, once parsing is complete, all elements should be non-NULL.	2014-03-27 12:08:23 +00:00
pr18704.ll.bc	All new elements except the last one initialized to NULL. Ideally, once parsing is complete, all elements should be non-NULL.	2014-03-27 12:08:23 +00:00
ptest-new.ll	Modify the LLVM assembly output so that it uses references to represent function attributes.	2013-02-20 07:21:42 +00:00
ptest-old.ll	Modify the LLVM assembly output so that it uses references to represent function attributes.	2013-02-20 07:21:42 +00:00
select.ll	Fold vector selects with undef elements in the condition. Fixes PR18319.	2013-12-31 19:30:47 +00:00
shuffle.ll	Use -disable-output and to suppress output and don't use a temporary file unless we need one.	2013-08-20 23:00:25 +00:00
ssse3_palignr.ll
tailcall.ll	Add 'musttail' marker to call instructions	2014-04-24 20:14:34 +00:00
terminatorInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
terminatorInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
upgrade-global-ctors.ll	Handle ConstantAggregateZero when upgrading global_ctors.	2014-05-17 21:00:22 +00:00
upgrade-global-ctors.ll.bc	Handle ConstantAggregateZero when upgrading global_ctors.	2014-05-17 21:00:22 +00:00
upgrade-tbaa.ll	AutoUpgrade: upgrade from scalar TBAA format to struct-path aware TBAA format.	2013-09-28 00:22:27 +00:00
variableArgumentIntrinsic.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-03-02 15:26:36 +00:00
variableArgumentIntrinsic.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-03-02 15:26:36 +00:00
vectorInstructions.3.2.ll	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
vectorInstructions.3.2.ll.bc	Ensure bitcode encoding of instructions and their operands stays stable.	2014-02-26 12:06:36 +00:00
visibility-styles.3.2.ll	Fixed CRLF	2013-12-08 12:16:20 +00:00
visibility-styles.3.2.ll.bc	Ensure bitcode encoding of visibility styles stays stable. Patch by Boaz Ouriel.	2013-12-08 11:35:09 +00:00
weak-cmpxchg-upgrade.ll	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
weak-cmpxchg-upgrade.ll.bc	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00