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2012-11-29Use MCPhysReg for RegisterClassInfo allocation orders.Jakob Stoklund Olesen
This saves a bit of memory. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168852 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Add an MCPhysReg typedef to replace naked uint16_t.Jakob Stoklund Olesen
Use this type for arrays of physical registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168850 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Instruction::isAssociative() returns true for fmul/fadd if they are tagged ↵Shuxin Yang
"unsafe" mode. Approved by: Eli and Michael. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168848 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Fast-math: Extend IRBuilder to have settable FastMathFlags to create ↵Michael Ilseman
instructions with Also extended IRBuilder's documentation to mention the convenience state for DefaultFPMathTag and FastMathFlags that can be set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168812 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Fast-math comments and convenience methodMichael Ilseman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168811 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Make the LiveRegMatrix analysis available to targets.Jakob Stoklund Olesen
No functional change, just moved header files. Targets can inject custom passes between register allocation and rewriting. This makes it possible to tweak the register allocation before rewriting, using the full global interference checking available from LiveRegMatrix. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168806 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Add backreference matching capabilities to Support/Regex, withEli Bendersky
appropriate unit tests. This change in itself is not expected to affect any functionality at this point, but it will serve as a stepping stone to improve FileCheck's variable matching capabilities. Luckily, our regex implementation already supports backreferences, although a bit of hacking is required to enable it. It supports both Basic Regular Expressions (BREs) and Extended Regular Expressions (EREs), without supporting backrefs for EREs, following POSIX strictly in this respect. And EREs is what we actually use (rightly). This is contrary to many implementations (including the default on Linux) of POSIX regexes, that do allow backrefs in EREs. Adding backref support to our EREs is a very simple change in the regcomp parsing code. I fail to think of significant cases where it would clash with existing things, and can bring more versatility to the regexes we write. There's always the danger of a backref in a specially crafted regex causing exponential matching times, but since we mainly use them for testing purposes I don't think it's a big problem. [it can also be placed behind a flag specific to FileCheck, if needed]. For more details, see: * http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-November/055840.html * http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121126/156878.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168802 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28[asan] Split AddressSanitizer into two passes (FunctionPass, ModulePass), ↵Kostya Serebryany
LLVM part. This requires a clang part which will follow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168781 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Add back support for reading and parsing 'deplibs'.Bill Wendling
This is for backwards compatibility for pre-3.x bc files. The code reads the code, but does nothing with it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168779 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28misched: Analysis that partitions the DAG into subtrees.Andrew Trick
This is a simple, cheap infrastructure for analyzing the shape of a DAG. It recognizes uniform DAGs that take the shape of bottom-up subtrees, such as the included matrix multiplication example. This is useful for heuristics that balance register pressure with ILP. Two canonical expressions of the heuristic are implemented in scheduling modes: -misched-ilpmin and -misched-ilpmax. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168773 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28misched: rename ScheduleDAGILP to ScheduleDFS to prepare for other heuristics.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168772 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Add brief support for the fission .debug_info.dwo section forEric Christopher
ELF output. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168764 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Rearrange ordering of sections.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168762 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Move and comment accessor routines.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168761 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Remove all references to TargetInstrInfoImpl.Jakob Stoklund Olesen
This class has been merged into its super-class TargetInstrInfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168760 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28Move the guts of TargetInstrInfoImpl into the TargetInstrInfo class.Jakob Stoklund Olesen
The *Impl class no longer serves a purpose now that the super-class implementation is in CodeGen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168759 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Fix comment formatting in RuntimeDyld.hAndrew Kaylor
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168739 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Moving SectionMemoryManager into RuntimeDyld and adding unit tests for it.Andrew Kaylor
The SectionMemoryManager now supports (and requires) applying section-specific page permissions. Clients using this memory manager must call either MCJIT::finalizeObject() or SectionMemoryManager::applyPermissions() before executing JITed code. See r168718 for changes from the previous implementation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168721 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Merge commit '8d20b5f9ff609e70fae5c865931ab0f29e639d9c'Derek Schuff
Conflicts: lib/CodeGen/AsmPrinter/DwarfDebug.cpp lib/CodeGen/AsmPrinter/DwarfDebug.h lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp lib/Target/Mips/MipsISelDAGToDAG.cpp lib/Target/Mips/MipsInstrFPU.td lib/Target/Mips/MipsSubtarget.cpp lib/Target/Mips/MipsSubtarget.h lib/Target/X86/X86MCInstLower.cpp tools/Makefile tools/llc/llc.cpp
2012-11-27Test commit only modifying commentsPedro Artigas
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168709 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27This patch implements medium code model support for 64-bit PowerPC.Bill Schmidt
The default for 64-bit PowerPC is small code model, in which TOC entries must be addressable using a 16-bit offset from the TOC pointer. Additionally, only TOC entries are addressed via the TOC pointer. With medium code model, TOC entries and data sections can all be addressed via the TOC pointer using a 32-bit offset. Cooperation with the linker allows 16-bit offsets to be used when these are sufficient, reducing the number of extra instructions that need to be executed. Medium code model also does not generate explicit TOC entries in ".section toc" for variables that are wholly internal to the compilation unit. Consider a load of an external 4-byte integer. With small code model, the compiler generates: ld 3, .LC1@toc(2) lwz 4, 0(3) .section .toc,"aw",@progbits .LC1: .tc ei[TC],ei With medium model, it instead generates: addis 3, 2, .LC1@toc@ha ld 3, .LC1@toc@l(3) lwz 4, 0(3) .section .toc,"aw",@progbits .LC1: .tc ei[TC],ei Here .LC1@toc@ha is a relocation requesting the upper 16 bits of the 32-bit offset of ei's TOC entry from the TOC base pointer. Similarly, .LC1@toc@l is a relocation requesting the lower 16 bits. Note that if the linker determines that ei's TOC entry is within a 16-bit offset of the TOC base pointer, it will replace the "addis" with a "nop", and replace the "ld" with the identical "ld" instruction from the small code model example. Consider next a load of a function-scope static integer. For small code model, the compiler generates: ld 3, .LC1@toc(2) lwz 4, 0(3) .section .toc,"aw",@progbits .LC1: .tc test_fn_static.si[TC],test_fn_static.si .type test_fn_static.si,@object .local test_fn_static.si .comm test_fn_static.si,4,4 For medium code model, the compiler generates: addis 3, 2, test_fn_static.si@toc@ha addi 3, 3, test_fn_static.si@toc@l lwz 4, 0(3) .type test_fn_static.si,@object .local test_fn_static.si .comm test_fn_static.si,4,4 Again, the linker may replace the "addis" with a "nop", calculating only a 16-bit offset when this is sufficient. Note that it would be more efficient for the compiler to generate: addis 3, 2, test_fn_static.si@toc@ha lwz 4, test_fn_static.si@toc@l(3) The current patch does not perform this optimization yet. This will be addressed as a peephole optimization in a later patch. For the moment, the default code model for 64-bit PowerPC will remain the small code model. We plan to eventually change the default to medium code model, which matches current upstream GCC behavior. Note that the different code models are ABI-compatible, so code compiled with different models will be linked and execute correctly. I've tested the regression suite and the application/benchmark test suite in two ways: Once with the patch as submitted here, and once with additional logic to force medium code model as the default. The tests all compile cleanly, with one exception. The mandel-2 application test fails due to an unrelated ABI compatibility with passing complex numbers. It just so happens that small code model was incredibly lucky, in that temporary values in floating-point registers held the expected values needed by the external library routine that was called incorrectly. My current thought is to correct the ABI problems with _Complex before making medium code model the default, to avoid introducing this "regression." Here are a few comments on how the patch works, since the selection code can be difficult to follow: The existing logic for small code model defines three pseudo-instructions: LDtoc for most uses, LDtocJTI for jump table addresses, and LDtocCPT for constant pool addresses. These are expanded by SelectCodeCommon(). The pseudo-instruction approach doesn't work for medium code model, because we need to generate two instructions when we match the same pattern. Instead, new logic in PPCDAGToDAGISel::Select() intercepts the TOC_ENTRY node for medium code model, and generates an ADDIStocHA followed by either a LDtocL or an ADDItocL. These new node types correspond naturally to the sequences described above. The addis/ld sequence is generated for the following cases: * Jump table addresses * Function addresses * External global variables * Tentative definitions of global variables (common linkage) The addis/addi sequence is generated for the following cases: * Constant pool entries * File-scope static global variables * Function-scope static variables Expanding to the two-instruction sequences at select time exposes the instructions to subsequent optimization, particularly scheduling. The rest of the processing occurs at assembly time, in PPCAsmPrinter::EmitInstruction. Each of the instructions is converted to a "real" PowerPC instruction. When a TOC entry needs to be created, this is done here in the same manner as for the existing LDtoc, LDtocJTI, and LDtocCPT pseudo-instructions (I factored out a new routine to handle this). I had originally thought that if a TOC entry was needed for LDtocL or ADDItocL, it would already have been generated for the previous ADDIStocHA. However, at higher optimization levels, the ADDIStocHA may appear in a different block, which may be assembled textually following the block containing the LDtocL or ADDItocL. So it is necessary to include the possibility of creating a new TOC entry for those two instructions. Note that for LDtocL, we generate a new form of LD called LDrs. This allows specifying the @toc@l relocation for the offset field of the LD instruction (i.e., the offset is replaced by a SymbolLo relocation). When the peephole optimization described above is added, we will need to do similar things for all immediate-form load and store operations. The seven "mcm-n.ll" test cases are kept separate because otherwise the intermingling of various TOC entries and so forth makes the tests fragile and hard to understand. The above assumes use of an external assembler. For use of the integrated assembler, new relocations are added and used by PPCELFObjectWriter. Testing is done with "mcm-obj.ll", which tests for proper generation of the various relocations for the same sequences tested with the external assembler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168708 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Remove the dependent libraries feature.Bill Wendling
The dependent libraries feature was never used and has bit-rotted. Remove it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168694 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Make PrintReg constructor explicit to prevent weird implicit conversions ↵Craig Topper
from accidentally being triggered. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168686 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27llvm/CodeGen: Remove empty files in r168659.NAKAMURA Takumi
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168663 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Remove unused MachineLoopRanges analysis.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168659 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Revert r168635 "Step towards implementation of pass manager with ↵Owen Anderson
doInitialization and doFinalization per module detangled from runOn?? calls, still has temporary code not to break ASAN to be removed when that pass conforms to the proposed model". It appears to have broken at least one buildbot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168654 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Fast-math optimization: fold multiply by zeroMichael Ilseman
Added in first optimization using fast-math flags to serve as an example for following optimizations. SimplifyInstruction will now try to optimize an fmul observing its FastMathFlags to see if it can fold multiply by zero when 'nnan' and 'nsz' flags are set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168648 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Fast-math flags for the bitcodeMichael Ilseman
Added in bitcode enum for the serializing of fast-math flags. Added in the reading/writing of fast-math flags from the OptimizationFlags record for BinaryOps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168646 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Fast-math interfaces for InstructionsMichael Ilseman
Add in getter/setter methods for Instructions, allowing them to be the interface to FPMathOperator similarly to now NUS/NSW is handled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168642 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Fast-math flags added to FPMathOperator.Michael Ilseman
Created FastMathFlags convenience struct for the getting and setting of fast-math flags en masse. Added SubclassOptionalData bitfields and corresponding getters/setters to FPMathOperator for the various fast-math flags. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168641 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-26Step towards implementation of pass manager with doInitialization and ↵Owen Anderson
doFinalization per module detangled from runOn?? calls, still has temporary code not to break ASAN to be removed when that pass conforms to the proposed model Patch by Pedro Artigas, with feedback from by Chandler Carruth. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168635 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-26Decouple MCInstBuilder from the streamer per Eli's request.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168597 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-26Add MCInstBuilder, a utility class to simplify MCInst creation similar to ↵Benjamin Kramer
MachineInstrBuilder. Simplify some repetitive code with it. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168587 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-25Code Custodian:Joe Abbey
- Widespread trailing space removal - A dash of OCD spacing to block align enums - joined a line that probably needed 80 cols a while back git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168566 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-25Add support for .cfi_register now that it is easy to extent the representationRafael Espindola
to support it. Original patch with the parsing and plumbing by the PaX team and Roman Divacky. I added the bits in MCDwarf.cpp and the test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168565 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-25Further cleanups. Thanks for Sean Silva for noticing it.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168556 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-25Add an extra slash so doxygen comments will be properly recognized.Craig Topper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168554 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-24libLTO: Add a utility method to initialize the disassemblers.Benjamin Kramer
Necessary to give disassembler users (like darwin's otool) a possibility to dlopen libLTO and still initialize the required LLVM bits. This used to go through libMCDisassembler but that's a gross layering violation, the MC layer can't pull in functions from the targets. Adding a function to libLTO is a bit of a hack but not worse than exposing other disassembler bits from libLTO. Fixes PR14362. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168545 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-24Change the representation of MCCFIInstruction.Rafael Espindola
We now store the Register and Offset directly. MachineLocation is gone (from this file)! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168536 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-24Give each MCCFIInstruction its own opcode.Rafael Espindola
This untangles the switch cases of the old Move and RelMove opcodes a bit and makes it clear how to add new instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168534 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-24Move a bit of duplicated code into a helper function.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168533 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-24Refactor how MCCFIInstructions are created.Rafael Espindola
Give MCCFIInstruction a single, private constructor and add helper static methods that create each type of cfi instruction. This is is preparation for changing its representation. The representation with a pair MachineLocations older than MC and has been abused quiet a bit to support more cfi instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168532 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-23Implement .cfi_undefined. Based on a patch from PaX team, updated byRafael Espindola
Roman Divacky. I just added the testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168520 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-23Remove unused parameter Penalty from the BoundsChecking pass.Joey Gouly
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168511 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-22Add more functions to the target library information.Meador Inge
I discovered a few more missing functions while migrating optimizations from the simplify-libcalls pass to the instcombine (I already added some in r167659). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168501 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-21Add relocations used for mips big GOT.Akira Hatanaka
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168448 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-21test commit: added a few commentsPreston Briggs
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168445 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-20removes a few "const" qualifiersSebastian Pop
so that I can (someday) call SE->getSCEV without complaint. No semantic change intended. Patch from Preston Briggs <preston.briggs@gmail.com>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168391 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-20Remove some dead code.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168374 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-20Fix a place where the declaration didn't use LLVM_ENABLE_DUMP but theChandler Carruth
definition did. The last part of PR14324. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168363 91177308-0d34-0410-b5e6-96231b3b80d8
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