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JF Bastien d1fb58538f Polish atomic pointers 
Summary:
I didn't realize that we already allowed atomic load/store of pointers,
it was added in 2012 by r162146. This patch updates the documentation
and tightens the verifier by using DataLayout to make sure that the
stored size is byte-sized and power-of-two. DataLayout is also used for
integers, and while I'm here I updated the corresponding code for
cmpxchg and rmw.

See the following discussion for context and upcoming changes to
add floating-point and vector atomics:
  https://groups.google.com/forum/#!topic/llvm-dev/Nh0P_E3CRoo/discussion

Reviewers: reames

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D15512

llvm-svn: 255931
 		2015-12-17 22:09:19 +00:00
..
AsmWriter.cpp [IR] Remove terminatepad 2015-12-14 18:34:23 +00:00
AttributeImpl.h llvm/lib/IR/AttributeImpl.h: Move comment block not to cover typedef, introduced in r244164. [-Wdocumentation] 2015-08-06 09:49:17 +00:00
Attributes.cpp Add InaccessibleMemOnly and inaccessibleMemOrArgMemOnly attributes 2015-12-16 16:16:19 +00:00
AutoUpgrade.cpp Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
BasicBlock.cpp IR: Remove implicit iterator conversions from lib/IR, NFC 2015-10-08 23:49:46 +00:00
CMakeLists.txt Revert r252990. 2015-11-13 01:44:32 +00:00
Comdat.cpp
…
ConstantFold.cpp Use CmpInst::Predicate instead of 'unsigned short' in some places. NFC 2015-12-15 06:11:33 +00:00
ConstantFold.h Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
ConstantRange.cpp [IR] Add a `makeNoWrapRegion` method to `ConstantRange` 2015-10-22 03:12:57 +00:00
Constants.cpp [IR] Add classof for GetElementPtrConstantExpr, CompareConstantExpr, InsertValueConstantExpr, and ExtractValueConstantExpr. All but CompareConstantExpr were being used in casts that were erroneously using ConstantExpr::classof due to inheritance. While there use cast<CompareConstantExpr> to simplify code slightly. 2015-12-15 06:11:36 +00:00
ConstantsContext.h [IR] Add classof for GetElementPtrConstantExpr, CompareConstantExpr, InsertValueConstantExpr, and ExtractValueConstantExpr. All but CompareConstantExpr were being used in casts that were erroneously using ConstantExpr::classof due to inheritance. While there use cast<CompareConstantExpr> to simplify code slightly. 2015-12-15 06:11:36 +00:00
Core.cpp IR: Remove implicit iterator conversions from lib/IR, NFC 2015-10-08 23:49:46 +00:00
DIBuilder.cpp Macro debug info support in LLVM IR 2015-12-10 12:56:35 +00:00
DataLayout.cpp Instcombine: destructor loads of structs that do not contains padding 2015-12-15 01:44:07 +00:00
DebugInfo.cpp DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
DebugInfoMetadata.cpp Macro debug info support in LLVM IR 2015-12-10 12:56:35 +00:00
DebugLoc.cpp IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
DiagnosticInfo.cpp [PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) 2015-12-09 18:08:16 +00:00
DiagnosticPrinter.cpp MIR Serialization: Connect the machine function analysis pass to the MIR parser. 2015-06-15 20:30:22 +00:00
Dominators.cpp [IR] Reformulate LLVM's EH funclet IR 2015-12-12 05:38:55 +00:00
Function.cpp Don't copy information from aliasee to alias. 2015-12-02 20:03:17 +00:00
FunctionInfo.cpp [ThinLTO] Handle bitcode without function summary sections gracefully 2015-11-21 21:55:48 +00:00
GCOV.cpp Rename one of our two llvm::GCOVOptions classes to llvm::GCOV::Options. We used 2015-10-14 00:04:19 +00:00
GVMaterializer.cpp
…
Globals.cpp Don't copy information from aliasee to alias. 2015-12-02 20:03:17 +00:00
IRBuilder.cpp Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
IRPrintingPasses.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
InlineAsm.cpp Fix SEGV in InlineAsm::ConstraintInfo::Parse. 2015-09-03 15:41:37 +00:00
Instruction.cpp Teach haveSameSpecialState about operand bundles 2015-12-14 19:11:35 +00:00
Instructions.cpp Use CmpInst::Predicate instead of 'unsigned short' in some places. NFC 2015-12-15 06:11:33 +00:00
IntrinsicInst.cpp IR: Split Metadata from Value 2014-12-09 18:38:53 +00:00
LLVMBuild.txt
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LLVMContext.cpp [WinEH] Use operand bundles to describe call sites 2015-12-15 21:27:27 +00:00
LLVMContextImpl.cpp [IR] Manage TheNoneToken with a std::unique_ptr 2015-11-16 20:55:57 +00:00
LLVMContextImpl.h Macro debug info support in LLVM IR 2015-12-10 12:56:35 +00:00
LegacyPassManager.cpp Remove debug output that snuck into 254957 2015-12-07 22:43:56 +00:00
MDBuilder.cpp [MDBuilder] Simplify code using initializer lists. NFC. 2015-11-22 18:03:17 +00:00
Makefile Revert r252990. 2015-11-13 01:44:32 +00:00
Mangler.cpp Remove unused arguments and move ManglerPrefixTy to the implementation. 2015-06-23 14:11:09 +00:00
Metadata.cpp [ThinLTO] Metadata linking for imported functions 2015-12-17 17:14:09 +00:00
MetadataImpl.h DI: Disallow uniquable DICompileUnits 2015-08-03 17:26:41 +00:00
MetadataTracking.cpp IR: Store RAUW support and Context in the same pointer, NFC 2015-01-19 19:02:06 +00:00
Module.cpp Interface to attach maximum function count from PGO to module as module flags. 2015-12-03 20:57:37 +00:00
Operator.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Pass.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
PassManager.cpp [PM] Push the debug option for the new pass manager into the opt tool 2015-01-13 22:42:38 +00:00
PassRegistry.cpp Revert r231276 (including r231277): Add a lock() function in PassRegistry to speed up multi-thread synchronization. 2015-03-05 17:53:00 +00:00
Statepoint.cpp Add invoke related functionality into StatepointSite classes. 2015-02-19 11:02:11 +00:00
SymbolTableListTraitsImpl.h IR: Remove implicit iterator conversions from lib/IR, NFC 2015-10-08 23:49:46 +00:00
Type.cpp [IR] Simplify code. No functionality change. 2015-08-16 21:16:26 +00:00
TypeFinder.cpp IR: Remove implicit iterator conversions from lib/IR, NFC 2015-10-08 23:49:46 +00:00
Use.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
User.cpp [IR] Teach `llvm::User` to co-allocate a descriptor. 2015-09-24 01:00:49 +00:00
Value.cpp Remove handling of AddrSpaceCast in stripAndAccumulateInBoundsConstantOffsets 2015-09-23 19:48:43 +00:00
ValueSymbolTable.cpp Have a single way for creating unique value names. 2015-11-22 00:16:24 +00:00
ValueTypes.cpp Add new vector types for 512-, 1024- and 2048-bit vectors 2015-11-24 13:07:35 +00:00
Verifier.cpp Polish atomic pointers 2015-12-17 22:09:19 +00:00
module.modulemap
…