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* SimplifyCFG: Enhance the "remove CFG edge that leads to null pointer ↵Benjamin Kramer2012-10-042-2/+31
| | | | | | | | | | dereference" optimization to also handle instructions with multiple uses. We conservatively only check the first use to avoid walking long use chains. This catches the common case of having both a load and a store to a pointer supplied by a PHI node. llvm-svn: 165232
* In my recent change to avoid use of underaligned memory I didn't notice thatDuncan Sands2012-10-042-9/+9
| | | | | | | | cpyDest can be mutated in some cases, which would then cause a crash later if indeed the memory was underaligned. This brought down several buildbots, so I guess the underaligned case is much more common than I thought! llvm-svn: 165228
* The alignment of an sret parameter is known: it must be at least theDuncan Sands2012-10-043-8/+33
| | | | | | alignment of the return type. Teach the optimizers this. llvm-svn: 165226
* Hoist some grossly duplicated code from the COFF/ELF/MachO streamers into ↵Benjamin Kramer2012-10-045-126/+32
| | | | | | MCObjectStreamer. llvm-svn: 165225
* Fix wrong name in comment.Duncan Sands2012-10-041-2/+2
| | | | llvm-svn: 165224
* Fix PR13969, a mini-phase-ordering issue with the new SROA pass.Chandler Carruth2012-10-042-23/+74
| | | | | | | | | | | | | | | | | | | | | Currently, we re-visit allocas when something changes about the way they might be *split* to allow better scalarization to take place. However, we weren't handling the case when the *promotion* is what would change the behavior of SROA. When an address derived from an alloca is stored into another alloca, we consider the first to have escaped. If the second is ever promoted to an SSA value, we will suddenly be able to run the SROA pass on the first alloca. This patch adds explicit support for this form if iteration. When we detect a store of a pointer derived from an alloca, we flag the underlying alloca for reprocessing after promotion. The logic works hard to only do this when there is definitely going to be promotion and it might remove impediments to the analysis of the alloca. Thanks to Nick for the great test case and Benjamin for some sanity check review. llvm-svn: 165223
* The memcpy optimizer was happily doing call slot forwarding when the new memoryDuncan Sands2012-10-042-7/+51
| | | | | | | | | | was less aligned than the old. In the testcase this results in an overaligned memset: the memset alignment was correct for the original memory but is too much for the new memory. Fix this by either increasing the alignment of the new memory or bailing out if that isn't possible. Should fix the gcc-4.7 self-host buildbot failure. llvm-svn: 165220
* Teach the integer-promotion rewrite strategy to be endianness aware.Chandler Carruth2012-10-047-14/+142
| | | | | | | | | | | | | | | | | | | | | | | Sorry for this being broken so long. =/ As part of this, switch all of the existing tests to be Little Endian, which is the behavior I was asserting in them anyways! Add in a new big-endian test that checks the interesting behavior there. Another part of this is to tighten the rules abotu when we perform the full-integer promotion. This logic now rejects cases where there fully promoted integer is a non-multiple-of-8 bitwidth or cases where the loads or stores touch bits which are in the allocated space of the alloca but are not loaded or stored when accessing the integer. Sadly, these aren't really observable today as the rest of the pass will already ensure the invariants hold. However, the latter situation is likely to become a potential concern in the future. Thanks to Benjamin and Duncan for early review of this patch. I'm still looking into whether there are further endianness issues, please let me know if anyone sees BE failures persisting past this. llvm-svn: 165219
* Use method to query if there are attributes.Bill Wendling2012-10-041-1/+1
| | | | llvm-svn: 165213
* Add method to query for NoCapture attribute.Bill Wendling2012-10-043-2/+23
| | | | llvm-svn: 165212
* Use method to query for NoAlias attribute.Bill Wendling2012-10-041-1/+1
| | | | llvm-svn: 165211
* Use attribute query methods.Bill Wendling2012-10-041-3/+3
| | | | llvm-svn: 165210
* Use method to query for attributes.Bill Wendling2012-10-043-11/+11
| | | | llvm-svn: 165209
* Add method to query for 'NoAlias' attribute on call/invoke instructions.Bill Wendling2012-10-044-1/+22
| | | | llvm-svn: 165208
* Use method to query for attributes.Bill Wendling2012-10-041-1/+1
| | | | llvm-svn: 165207
* Query for attributes via the correct method call.Bill Wendling2012-10-041-2/+2
| | | | llvm-svn: 165206
* Use new accessor methods to query for attributes.Bill Wendling2012-10-044-4/+4
| | | | llvm-svn: 165205
* [tsan] add 3 internal flags for fine-grain control of what is instrumented ↵Kostya Serebryany2012-10-041-7/+18
| | | | | | and what is not. llvm-svn: 165204
* Remove template from function that is only used with one type after r165092.Craig Topper2012-10-041-4/+5
| | | | llvm-svn: 165203
* Fix reg mask slot test, and preserve LiveIntervals and VirtRegMap in the PBQPLang Hames2012-10-041-1/+3
| | | | | | allocator. Fixes PR13945. llvm-svn: 165201
* docs: Fix typo on front pageSean Silva2012-10-041-1/+1
| | | | llvm-svn: 165200
* Implement methods that enable expansion of load immediate Jack Carter2012-10-044-28/+129
| | | | | | | | | | | | | | | | | | | | | | | | macro instruction (li) in the assembler. We have identified three possible expansions depending on the size of immediate operand: 1) for 0 ≤ j ≤ 65535. li d,j => ori d,$zero,j 2) for −32768 ≤ j < 0. li d,j => addiu d,$zero,j 3) for any other value of j that is representable as a 32-bit integer. li d,j => lui d,hi16(j) ori d,d,lo16(j) All of the above have been implemented in ths patch. Contributer: Vladimir Medic llvm-svn: 165199
* docs: Sphinxify GoldPlugin document.Sean Silva2012-10-044-228/+190
| | | | llvm-svn: 165198
* This patch is a partial implementation of mips .set assembler directive. ↵Jack Carter2012-10-042-44/+245
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Directive is defined as follows: .set option The patch implements following options at - lets the assembler use the $at register for macros, but generates warnings if the source program uses $at noat - let source programs use $at without issuingwarnings. noreorder - prevents the assembler from reordering machine language instructions. nomacro - causes the assembler to print a warning whenever an assembler operation generates more than one machine language instruction. macro - lets the assembler generate multiple machine instructions from a single assembler instruction reorder - lets the assembler reorder machine language instructions to improve performance The above variants are parsed and their boolean values set or unset. The code to actually use them will come later. Following options are not implemented yet: nomips16 nomicromips move nomove Contributer: Vladimir Medic llvm-svn: 165194
* tblgen: Whitespace and 80-col cleanup.Sean Silva2012-10-041-11/+12
| | | | llvm-svn: 165190
* Make sure 'prefix-clang++' is aliased to 'prefix-clang', not 'clang'.Jordan Rose2012-10-041-2/+2
| | | | | | | | | | | | | When aliasing tools, rather than using the base TOOLEXENAME, we should instead use the built tool's basename (for 'make') or the installed tool's basename (for 'make install'). This should not cause any changes for anyone building unprefixed 'clang' and 'clang++' tools. Patch by Rick Foos! llvm-svn: 165189
* Enable -schedmodel, but prefer itineraries until we have more benchmark data.Andrew Trick2012-10-041-52/+51
| | | | llvm-svn: 165188
* Fix PR13967.Jakub Staszak2012-10-032-1/+30
| | | | llvm-svn: 165187
* Add an explicit -object_path_lto flag during linking with a uniquified temporaryBill Wendling2012-10-032-1/+15
| | | | | | file name if building Apple-style. llvm-svn: 165185
* Clean up tailing whitespacesMichael Liao2012-10-031-2/+2
| | | | llvm-svn: 165182
* Added instregex support to TableGen subtarget emitter.Andrew Trick2012-10-034-12/+95
| | | | | | | | This allows the processor-specific machine model to override selected base opcodes without any fanciness. e.g. InstRW<[CoreXWriteVANDP], (instregex "VANDP")>. llvm-svn: 165180
* TableGen subtarget emitter, nearly first class support for SchedAlias.Andrew Trick2012-10-033-130/+229
| | | | | | | | | A processor can now arbitrarily alias one SchedWrite onto another. Only the SchedAlias definition need be within the processor model. The aliased SchedWrite may be a SchedVariant, WriteSequence, or transitively refer to another alias. llvm-svn: 165179
* Cleanup TableGen subtarget emitter.Andrew Trick2012-10-032-6/+7
| | | | llvm-svn: 165178
* [ms-inline asm] Default to the 'm' constraint. This matches the behavior of theChad Rosier2012-10-031-3/+3
| | | | | | MSVC compiler. llvm-svn: 165174
* [ms-inline asm] Add support in the X86AsmPrinter for printing memory referencesChad Rosier2012-10-033-0/+70
| | | | | | | | | | | in the Intel syntax. The MC layer supports emitting in the Intel syntax, but this would require the inline assembly MachineInstr to be lowered to an MCInst before emission. This is potential future work, but for now emitting directly from the MachineInstr suffices. llvm-svn: 165173
* This patch moves from using a hard coded number (4) Jack Carter2012-10-031-2/+4
| | | | | | | | | | | | | for the number of bytes in a particular instruction to using const MCInstrDesc &Desc = MCII.get(TmpInst.getOpcode()); Desc.getSize() This is necessary with the advent of 16 bit instructions with mips16 and micromips. It is also puts Mips in compliance with the other targets for getting instruction size. llvm-svn: 165171
* tblgen: Remove last traces of old TableGenMain API.Sean Silva2012-10-035-76/+1
| | | | llvm-svn: 165168
* tblgen: Migrate llvm-tblgen to new TableGenMain API.Sean Silva2012-10-031-82/+77
| | | | llvm-svn: 165166
* tblgen: Put new TableGenMain API in place.Sean Silva2012-10-032-0/+27
| | | | | | | | In order to avoid rev-lock with Clang when moving to the new API, also preserve the current API temporarily and insert a shim to implement the new API in terms of the old. llvm-svn: 165165
* Add function to return return attributes.Bill Wendling2012-10-031-0/+6
| | | | llvm-svn: 165164
* Update to use the predicate methods to query if an attribute exists.Bill Wendling2012-10-031-17/+17
| | | | llvm-svn: 165163
* Fix a cycle in the DAG. In this code we replace multiple loads with a single ↵Nadav Rotem2012-10-032-7/+50
| | | | | | | | | | | load and multiple stores with a single load. We create the wide loads and stores (and their chains) before we remove the scalar loads and stores and fix the DAG chain. We attempted to merge loads with a different chain. When that happened, the assumption that it is safe to RAUW broke and a cycle was introduced. llvm-svn: 165148
* Use unsigned long long instead of uin64_t for OS where that matters.Nick Kledzik2012-10-031-1/+1
| | | | llvm-svn: 165147
* Typos.Chad Rosier2012-10-032-5/+4
| | | | llvm-svn: 165141
* Don't call getAsUnsignedInteger directly, it fails to compile if uint64_t is ↵Benjamin Kramer2012-10-031-1/+5
| | | | | | | | not "unsigned long long". while there add more test cases. llvm-svn: 165140
* Add getAsUnsignedInteger test case that checks that known bad values are ↵Nick Kledzik2012-10-031-0/+19
| | | | | | rejected llvm-svn: 165136
* No need to call functions which do the same thing as the default.Bill Wendling2012-10-031-4/+0
| | | | llvm-svn: 165135
* Remove assert that's too restrictive.Bill Wendling2012-10-031-1/+4
| | | | llvm-svn: 165134
* Add methods which query for the specific attribute instead of using theBill Wendling2012-10-035-16/+148
| | | | | | enums. This allows for better encapsulation of the Attributes class. llvm-svn: 165132
* Implement .rel relocation for R_ARM_ABS32 in MCJIT.Tim Northover2012-10-032-2/+26
| | | | | | Patch by Amara Emerson. llvm-svn: 165128
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