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Chandler Carruth 1a3c2c414c Revert r220349 to re-instate r220277 with a fix for PR21330 -- quite 
clearly only exactly equal width ptrtoint and inttoptr casts are no-op
casts, it says so right there in the langref. Make the code agree.

Original log from r220277:
Teach the load analysis to allow finding available values which require
inttoptr or ptrtoint cast provided there is datalayout available.
Eventually, the datalayout can just be required but in practice it will
always be there today.

To go with the ability to expose available values requiring a ptrtoint
or inttoptr cast, helpers are added to perform one of these three casts.

These smarts are necessary to finish canonicalizing loads and stores to
the operational type requirements without regressing fundamental
combines.

I've added some test cases. These should actually improve as the load
combining and store combining improves, but they may fundamentally be
highlighting some missing combines for select in addition to exercising
the specific added logic to load analysis.

llvm-svn: 222739
 		2014-11-25 08:20:27 +00:00
..
AsmWriter.cpp Revert "IR: MDNode => Value" 2014-11-11 21:30:22 +00:00
AsmWriter.h IR: Implement uselistorder assembly directives 2014-08-19 21:30:15 +00:00
AttributeImpl.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
Attributes.cpp Revert accidentally committed r217107 2014-09-03 23:38:05 +00:00
AutoUpgrade.cpp Revert "IR: MDNode => Value" 2014-11-11 21:30:22 +00:00
BasicBlock.cpp Move helper for getting a terminating musttail call to BasicBlock 2014-08-12 00:05:15 +00:00
CMakeLists.txt IPO: Add use-list-order verifier 2014-07-25 14:49:26 +00:00
Comdat.cpp IR: Add COMDATs to the IR 2014-06-27 18:19:56 +00:00
ConstantFold.cpp Return undef on FP <-> Int conversions that overflow (PR21330). 2014-10-10 23:00:21 +00:00
ConstantFold.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
ConstantRange.cpp
…
Constants.cpp Revert "unique_ptrify LLVMContextImpl::CAZConstants" 2014-11-25 02:26:22 +00:00
ConstantsContext.h IR: De-duplicate code for replacing operands in place 2014-08-19 19:13:30 +00:00
Core.cpp Revert "IR: MDNode => Value" 2014-11-11 21:30:22 +00:00
DIBuilder.cpp Debug Info: revert r222195, r222210 and r222239. 2014-11-21 19:55:23 +00:00
DataLayout.cpp Switch the default DataLayout to be little endian, and make the variable 2014-10-20 10:41:29 +00:00
DebugInfo.cpp Debug Info: revert r222195, r222210 and r222239. 2014-11-21 19:55:23 +00:00
DebugLoc.cpp Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
DiagnosticInfo.cpp Revert "IR: MDNode => Value" 2014-11-11 21:30:22 +00:00
DiagnosticPrinter.cpp Fix typos in comments, NFC 2014-08-29 21:53:01 +00:00
Dominators.cpp Revert "[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges." 2014-07-21 17:06:51 +00:00
Function.cpp Incorporate review comments from r221742 2014-11-24 23:24:24 +00:00
GCOV.cpp GCOV: Make sure that function idents in the .gcda and .gcno match 2014-11-06 06:55:02 +00:00
GVMaterializer.cpp
…
Globals.cpp Copy externally_initialized in GlobalVariable::copyAttributesFrom. 2014-11-10 18:41:59 +00:00
IRBuilder.cpp Masked Vector Load and Store Intrinsics. 2014-11-23 08:07:43 +00:00
IRPrintingPasses.cpp Fix some misplaced spaces around 'override' 2014-05-24 20:19:40 +00:00
InlineAsm.cpp [inline asm] Add a check in InlineAsm::ConstraintInfo::Parse to make sure '{' 2014-09-05 22:30:32 +00:00
Instruction.cpp Revert "IR: MDNode => Value" 2014-11-11 21:30:22 +00:00
Instructions.cpp Revert r220349 to re-instate r220277 with a fix for PR21330 -- quite 2014-11-25 08:20:27 +00:00
IntrinsicInst.cpp
…
LLVMBuild.txt
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LLVMContext.cpp Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
LLVMContextImpl.cpp Revert "unique_ptrify LLVMContextImpl::CAZConstants" 2014-11-25 02:26:22 +00:00
LLVMContextImpl.h Revert "unique_ptrify LLVMContextImpl::CAZConstants" 2014-11-25 02:26:22 +00:00
LeakDetector.cpp
…
LeaksContext.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
LegacyPassManager.cpp Remove redundant calls to isMaterializable. 2014-11-01 16:46:18 +00:00
MDBuilder.cpp Simplify creation of a bunch of ArrayRefs by using None, makeArrayRef or just letting them be implicitly created. 2014-08-27 05:25:25 +00:00
Makefile
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Mangler.cpp Silencing an "enumeral and non-enumeral type in conditional expression" warning; NFC. 2014-10-28 13:12:13 +00:00
Metadata.cpp IR: Sink MDNode::Hash down to GenericMDNode::Hash 2014-11-18 02:20:29 +00:00
Module.cpp Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
Pass.cpp Remove pimpl class from PassRegistry. 2014-06-12 16:06:51 +00:00
PassManager.cpp Remove unnecessary/redundant std::move 2014-07-16 17:09:21 +00:00
PassRegistry.cpp [PM] Remove an unused and rather expensive mapping from an analysis 2014-10-06 00:30:59 +00:00
SymbolTableListTraitsImpl.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
Type.cpp Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool> 2014-11-19 07:49:26 +00:00
TypeFinder.cpp Revert "IR: MDNode => Value" 2014-11-11 21:30:22 +00:00
Use.cpp Fix a URL (NFC) 2014-08-21 21:09:24 +00:00
UseListOrder.cpp verify-uselistorder: Force -preserve-bc-use-list-order 2014-08-19 21:08:27 +00:00
User.cpp IR: Cleanup comments for Value, User, and MDNode 2014-10-15 20:28:31 +00:00
Value.cpp [InstCombine] Re-commit of r218721 (Optimize icmp-select-icmp sequence) 2014-11-21 23:36:44 +00:00
ValueSymbolTable.cpp Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
ValueTypes.cpp
…
Verifier.cpp Masked Vector Load and Store Intrinsics. 2014-11-23 08:07:43 +00:00
module.modulemap
…