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8ef1184049
llvm-mirror/include/llvm
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Chandler Carruth 8ef1184049 We really want to hash pairs of directly-hashable data as directly 
hashable data. This matters when we have pair<T*, U*> as a key, which is
quite common in DenseMap, etc. To that end, we need to detect when this
is safe. The requirements on a generic std::pair<T, U> are:

1) Both T and U must satisfy the existing is_hashable_data trait. Note
   that this includes the requirement that T and U have no internal
   padding bits or other bits not contributing directly to equality.
2) The alignment constraints of std::pair<T, U> do not require padding
   between consecutive objects.
3) The alignment constraints of U and the size of T do not conspire to
   require padding between the first and second elements.

Grow two somewhat magical traits to detect this by forming a pod
structure and inspecting offset artifacts on it. Hopefully this won't
cause any compilers to panic.

Added and adjusted tests now that pairs, even nested pairs, are treated
as just sequences of data.

Thanks to Jeffrey Yasskin for helping me sort through this and reviewing
the somewhat subtle traits.

llvm-svn: 151883
2012-03-02 09:26:36 +00:00
..
ADT We really want to hash pairs of directly-hashable data as directly 2012-03-02 09:26:36 +00:00
Analysis Change the implementation of dominates(inst, inst) to one based on what the 2012-02-26 02:19:19 +00:00
Assembly Make headers standalone. 2011-11-14 17:45:03 +00:00
Bitcode BitstreamWriter: Use SmallVector::append instead of multiple push_back calls. 2012-02-29 21:02:05 +00:00
CodeGen Make InlineSpiller bundle-aware. 2012-03-01 01:43:25 +00:00
Config add LLVM_VERSION_MAJOR and _MINOR defines 2012-02-13 18:48:10 +00:00
DebugInfo DebugInfo: Add equality operators and default constructor to DILineInfo. 2011-09-21 01:13:16 +00:00
ExecutionEngine Convert assert(0) to llvm_unreachable 2012-02-05 22:14:15 +00:00
MC Grammar-o in function name. 2012-03-02 02:11:47 +00:00
Object [Object] 2012-03-01 22:19:54 +00:00
Support We really want to hash pairs of directly-hashable data as directly 2012-03-02 09:26:36 +00:00
TableGen Add Foreach Loop 2012-02-22 16:09:41 +00:00
Target Move getSubRegIndex out of generated code into MCRegisterInfo, devirtualize it. 2012-03-01 18:16:35 +00:00
Transforms Add support for disabling llvm.lifetime intrinsics in the AlwaysInliner. These 2012-02-25 02:56:01 +00:00
Argument.h Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 2011-12-20 02:50:00 +00:00
Attributes.h Don't use static CTORs for the Attributes constants, while still keeping the class type-safe 2012-02-08 01:11:21 +00:00
AutoUpgrade.h remove autoupgrade support for really old-style debug info intrinsics. 2011-11-27 06:18:33 +00:00
BasicBlock.h Add a constified getLandingPad() method. 2012-01-31 00:26:24 +00:00
CallGraphSCCPass.h
CallingConv.h
CMakeLists.txt build/cmake: Use tblgen macro directly instead of llvm_tablegen, which just 2011-11-04 19:04:23 +00:00
Constant.h Convert assert(0) to llvm_unreachable 2012-02-05 22:14:15 +00:00
Constants.h Efficient Constant Uniquing. 2012-02-05 20:54:10 +00:00
DebugInfoProbe.h
DefaultPasses.h Add a couple missing includes; found while analyzing LLVM headers. 2011-11-04 18:19:43 +00:00
DerivedTypes.h Add support for vectors of pointers. 2011-12-05 06:29:09 +00:00
Function.h Refactor code from inlining and globalopt that checks whether a function definition is unused, and enhance it so it can tell that functions which are only used by a blockaddress are in fact dead. This probably doesn't happen much on most code, but the Linux kernel's _THIS_IP_ can trigger this issue with blockaddress. (GlobalDCE can also handle the given tescase, but we only run that at -O3.) Found while looking at PR11180. 2011-10-20 05:23:42 +00:00
GlobalAlias.h Remove DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS, folding its 2011-08-22 09:37:03 +00:00
GlobalValue.h Re-fix the issue Bill fixed in r147899 in a slightly different way, which doesn't abuse the semantics of linker_private. We don't really want to merge any string constant with a weak_odr global. 2012-01-11 22:06:46 +00:00
GlobalVariable.h land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
GVMaterializer.h
InitializePasses.h ThreadSanitizer, a race detector. First LLVM commit. 2012-02-13 22:50:51 +00:00
InlineAsm.h Encode register class constreaints in inline asm instructions. 2011-10-12 23:37:29 +00:00
InstrTypes.h Add some missing anchors. 2011-12-01 08:00:17 +00:00
Instruction.def [unwind removal] Remove all of the code for the dead 'unwind' instruction. There 2012-02-06 21:44:22 +00:00
Instruction.h Move Instruction::isSafeToSpeculativelyExecute out of VMCore and 2011-12-14 23:49:11 +00:00
Instructions.h [unwind removal] Remove all of the code for the dead 'unwind' instruction. There 2012-02-06 21:44:22 +00:00
IntrinsicInst.h Remove the eh.exception and eh.selector intrinsics. Also remove a hack to copy 2012-01-31 01:46:13 +00:00
Intrinsics.h land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
Intrinsics.td Remove the now-dead llvm.eh.exception and llvm.eh.selector intrinsics. 2012-01-31 01:58:48 +00:00
IntrinsicsARM.td Add support for ARM ldrexd/strexd intrinsics. They both use i32 register pairs 2011-05-28 04:07:29 +00:00
IntrinsicsCellSPU.td
IntrinsicsHexagon.td Hexagon backend support 2011-12-12 21:14:40 +00:00
IntrinsicsPowerPC.td
IntrinsicsPTX.td
IntrinsicsX86.td Remove GCC builtins for vpermilp* intrinsics as clang no longer needs them. Custom lower the intrinsics to the vpermilp target specific node and remove intrinsic patterns. 2012-02-08 06:36:57 +00:00
IntrinsicsXCore.td Update IntrinsicsXCore.td with the normal LLVM notice at the top of the file. 2011-10-13 21:08:11 +00:00
LinkAllPasses.h Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00
LinkAllVMCore.h
Linker.h Make it possible to use the linker without destroying the source module. This is so the source module can be linked to multiple other destination modules. For all that used LinkModules() before, they will continue to destroy the source module as before. 2011-10-11 00:24:54 +00:00
LLVMContext.h generalize LLVMContext::emitError to take a twine instead of a StringRef. 2012-01-03 23:47:05 +00:00
Metadata.h Add a way to replace a field inside a metadata node. This can be 2012-02-15 09:09:29 +00:00
Module.h s/ModAttrBehavior/ModFlagBehavior/g to be consistent with how module flags are named elsewhere. 2012-02-16 10:28:10 +00:00
OperandTraits.h Remove DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS, folding its 2011-08-22 09:37:03 +00:00
Operator.h Add support for vectors of pointers. 2011-12-05 06:29:09 +00:00
Pass.h Added TargetPassConfig::disablePass/substitutePass as a general mechanism to override specific passes. 2012-02-15 03:21:47 +00:00
PassAnalysisSupport.h Add a couple missing includes; found while analyzing LLVM headers. 2011-11-04 18:19:43 +00:00
PassManager.h Add pass printer passes in the right place. 2012-02-01 07:16:20 +00:00
PassManagers.h Add pass printer passes in the right place. 2012-02-01 07:16:20 +00:00
PassRegistry.h
PassSupport.h Add Tsan annotations to the pass system. 2011-12-08 00:15:41 +00:00
SymbolTableListTraits.h
Type.h add StructType helpers too. 2012-01-26 00:06:44 +00:00
Use.h Reinstate r133513 (reverted in r133700) with an additional fix for a 2011-06-23 09:09:15 +00:00
User.h Convert assert(0) to llvm_unreachable 2012-02-05 22:14:15 +00:00
Value.h start the implementation of a new ConstantDataVector and ConstantDataArray 2012-01-23 22:57:10 +00:00
ValueSymbolTable.h