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2013-01-05Switch LoopIdiomRecognize to directly use the TargetTransformInfoChandler Carruth
interface rather than the ScalarTargetTransformInterface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171616 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Switch the empty and tombstone key enumerators to not have explicitChandler Carruth
values -- that's not required to fix the bug that was cropping up, and the values selected made the enumeration's underlying type signed and introduced some warnings. This fixes the -Werror build. The underlying issue here was that the DenseMapInfo was casting values completely outside the range of the underlying storage of the enumeration to the enumeration's type. GCC went and "optimized" that into infloops and other misbehavior. By providing designated special values for these keys in the dense map, we ensure they are indeed representable and that they won't be used for anything else. It might be better to reuse None for the empty key and have the tombstone share the value of the sentinel enumerator, but honestly having 2 extra enumerators seemed not to matter and this seems a bit simpler. I'll let Bill shuffle this around (or ask me to shuffle it around) if he prefers it to look a different way. I also made the switch a bit more clear (and produce a better assert) that the enumerators are *never* going to show up and are errors if they do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171614 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05IR/Attributes: Provide EmptyKey and TombstoneKey in part of enum, as ↵NAKAMURA Takumi
workaround for gcc-4.4 take #2. I will investigate, later, what was wrong. I am too tired for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171611 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Emit DW_TAG_formal_parameter for unnamed parameters.David Blaikie
This change essentially reverts r87069 which came without a test case. It causes no regressions in the GDB 7.5 test suite & fixes 25 xfails (commit to the test suite to follow). If anyone can present a test case that demonstrates why this check is necessary I'd be happy to account for it in one way or another. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171609 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Recommit r171461 which was incorrectly reverted. Mark DIV/IDIV instructions ↵Craig Topper
hasSideEffects=1 because they can trap when dividing by 0. This is needed to keep early if conversion from moving them across basic blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171608 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Revert revision 171524. Original message:Nadav Rotem
URL: http://llvm.org/viewvc/llvm-project?rev=171524&view=rev Log: The current Intel Atom microarchitecture has a feature whereby when a function returns early then it is slightly faster to execute a sequence of NOP instructions to wait until the return address is ready, as opposed to simply stalling on the ret instruction until the return address is ready. When compiling for X86 Atom only, this patch will run a pass, called "X86PadShortFunction" which will add NOP instructions where less than four cycles elapse between function entry and return. It includes tests. Patch by Andy Zhang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171603 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Don't call destructors on MachineInstr and MachineOperand.Jakob Stoklund Olesen
The series of patches leading up to this one makes llc -O0 run 8% faster. When deallocating a MachineFunction, there is no need to visit all MachineInstr and MachineOperand objects to deallocate them. All their memory come from a BumpPtrAllocator that is about to be purged, and they have empty destructors anyway. This only applies when deallocating the MachineFunction. DeleteMachineInstr() should still be used to recycle MI memory during the codegen passes. Remove the LeakDetector support for MachineInstr. I've never seen it used before, and now it definitely doesn't work. With this patch, leaked MachineInstrs would be much less of a problem since all of their memory will be reclaimed by ~MachineFunction(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171599 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Use ArrayRecycler for MachineInstr operand lists.Jakob Stoklund Olesen
Instead of an std::vector<MachineOperand>, use MachineOperand arrays from an ArrayRecycler living in MachineFunction. This has several advantages: - MachineInstr now has a trivial destructor, making it possible to delete them in batches when destroying MachineFunction. This will be enabled in a later patch. - Bypassing malloc() and free() can be faster, depending on the system library. - MachineInstr objects and their operands are allocated from the same BumpPtrAllocator, so they will usually be next to each other in memory, providing better locality of reference. - Reduce MachineInstr footprint. A std::vector is 24 bytes, the new operand array representation only uses 8+4+1 bytes in MachineInstr. - Better control over operand array reallocations. In the old representation, the use-def chains would be reordered whenever a std::vector reached its capacity. The new implementation never changes the use-def chain order. Note that some decisions in the code generator depend on the use-def chain orders, so this patch may cause different assembly to be produced in a few cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Add MachineRegisterInfo::moveOperands().Jakob Stoklund Olesen
This function works like memmove() for MachineOperands, except it also updates any use-def chains containing the moved operands. The use-def chains are updated without affecting the order of operands in the list. That isn't possible when using the removeRegOperandFromUseList() and addRegOperandToUseList() functions. Callers to follow soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171597 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Refactor the ScalarTargetTransformInfo API for querying about theChandler Carruth
legality of an address mode to not use a struct of four values and instead to accept them as parameters. I'd love to have named parameters here as most callers only care about one or two of these, but the defaults aren't terribly scary to write out. That said, there is no real impact of this as the passes aren't yet using STTI for this and are still relying upon TargetLowering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171595 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Sink the AddressingModeMatcher helper class into an anonymous namespaceChandler Carruth
next to its only user. This helper relies on TargetLowering information that shouldn't be generally used throughout the Transfoms library, and so it made little sense as a generic utility. This also consolidates the file where we need to remove the remaining uses of TargetLowering in favor of the IR-layer abstract interface in TargetTransformInfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171590 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05[mips] Fix data layout string. Add 64 to the list of native integer widthsAkira Hatanaka
and add stack alignment information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171587 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Add a method to create an AttributeSet from an AttrBuilder.Bill Wendling
The Attribute class is eventually going to represent one attribute. So we need this class to create the set of attributes. Add some iterator methods to the builder to access its internal bits in a nice way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171586 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05iLoopVectorize: Non commutative operators can be used as reduction variables ↵Nadav Rotem
as long as the reduction chain is used in the LHS. PR14803. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171583 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Eric thought that Darwin was right to use -1 consistently rather thanChandler Carruth
leaving this undefined, and despite the sentence in the standard that seems to require it, I'll cede the point and assume its a bug in the wording. Other parts of POSIX regularly allow for things to be -1 instead of undefined, this should too. Makes things more consistent too. This should have to real impact for folks though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171574 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-05Try to suppress the use of clock_gettime on Darwin which apparantlyChandler Carruth
defines _POSIX_CPUTIME but doesn't support the clock_* functions. I don't test the value of _POSIX_CPUTIME because the spec merely says that if it is defined, the CPU-specific timers are available, whereas it says that _POSIX_TIMERS must be defined and defined to a value greater than zero. However, this may not work, as the POSIX spec clearly states: "If the symbolic constant _POSIX_CPUTIME is defined, then the symbolic constant _POSIX_TIMERS shall also be defined by the implementation to have the value 200112L." If this doesn't work, I'll add more hacks for Darwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171565 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Fix an obvious typo spotted by Reid Kleckner, and breaking windows builds.Chandler Carruth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171559 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Get rid of the 'Bits' mask in the attribute builder.Bill Wendling
The bit mask thing will be a thing of the past. It's not extensible enough. Get rid of its use here. Opt instead for using a vector to hold the attributes. Note: Some of this code will become obsolete once the rewrite is further along. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171553 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Add time getters to the process interface for requesting the elapsedChandler Carruth
wall time, user time, and system time since a process started. For walltime, we currently use TimeValue's interface and a global initializer to compute a close approximation of total process runtime. For user time, this adds support for an somewhat more precise timing mechanism -- clock_gettime with the CLOCK_PROCESS_CPUTIME_ID clock selected. For system time, we have to do a full getrusage call to extract the system time from the OS. This is expensive but unavoidable. In passing, clean up the implementation of the old APIs and fix some latent bugs in the Windows code. This might have manifested on Windows ARM systems or other systems with strange 64-bit integer behavior. The old API for this both user time and system time simultaneously from a single getrusage call. While this results in fewer system calls, it also results in a lower precision user time and if only user time is desired, it introduces a higher overhead. It may be worthwhile to switch some of the pass timers to not track system time and directly track user and wall time. The old API also tracked walltime in a confusing way -- it just set it to the current walltime rather than providing any measure of wall time since the process started the way buth user and system time are tracked. The new API is more consistent here. The plan is to eventually implement these methods for a *child* process by using the wait3(2) system call to populate an rusage struct representing the whole subprocess execution. That way, after waiting on a child process its stats will become accurate and cheap to query. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171551 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Move 'break' to the right place to prevent fallthru. There is no test-caseJakub Staszak
because conditions in the next case prevented from doing anything nasty. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171549 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Move an assertion so it doesn't dereference end().Jakob Stoklund Olesen
The R600 target has test cases that exercises this code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171538 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Do not vectorize loops with subtraction reductionsPaul Redmond
Since subtraction does not commute the loop vectorizer incorrectly vectorizes reductions such as x = A[i] - x. Disabling for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171537 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Add a name for the anonymous type we're creating for subrangeEric Christopher
types and a FIXME for what we should be doing. Should solve the immediacy of PR12069 where our debug info is crashing another tool. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171536 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Added DEBUG message to ObjCARC when we optimize objc_retain => ↵Michael Gottesman
objc_retainAutorelasedReturnValue. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171535 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Fixed up some DEBUG messages where I was putting in the text of a message ↵Michael Gottesman
the method where it was being called when I should have just prefixed the actual message with Pass::Method. Additionally I fixed some whitespace issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171534 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Fix a warningNadav Rotem
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171525 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04The current Intel Atom microarchitecture has a feature whereby when a functionPreston Gurd
returns early then it is slightly faster to execute a sequence of NOP instructions to wait until the return address is ready, as opposed to simply stalling on the ret instruction until the return address is ready. When compiling for X86 Atom only, this patch will run a pass, called "X86PadShortFunction" which will add NOP instructions where less than four cycles elapse between function entry and return. It includes tests. Patch by Andy Zhang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171524 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04General cleanups.Bill Wendling
* Remove dead methods. * Use the 'operator==' method instead of 'contains', which isn't needed. * Fix some comments. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171523 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04[Object][ELF] Add a maximum alignment. This is used by createELFObjectFile ↵Michael J. Spencer
to create a properly aligned reader. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171520 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04[mips] MipsTargetLowering::getSetCCResultType should return a vector type ifAkira Hatanaka
vectors are being compared. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171517 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04[mips] 80 columns.Akira Hatanaka
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171515 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Fix how YAML I/O detects flow sequences. Nick Kledzik
Update test case to verify flow sequence is written as a flow sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171514 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04[mips] Reorder template parameters. Remove class shift_rotate_imm32 andAkira Hatanaka
shift_rotate_imm64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171513 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate theManman Ren
reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171512 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04[mips] Refactor conditional move instructions.Akira Hatanaka
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171511 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04[mips] Refactor instructions which move data from or to coprocessors.Akira Hatanaka
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171510 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Remove unused #includeEli Bendersky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171507 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04PowerPC: Fix eh_frame relocation for PIC Adhemerval Zanella
This patch fixes the PPC eh_frame definitions for the personality and frame unwinding for PIC objects. It makes PIC build correctly creates relative relocations in the '.rela.eh_frame' segments and thus avoiding a text relocation that generates a DT_TEXTREL segments in link phase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171506 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Change the default number of registers to prevent unrolling on targets that ↵Nadav Rotem
dont have this hook. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171489 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Add a space to the end of the line so we don't get "itsbounds" in output.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171487 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04small fixes to enable the reuse of the pass manager across multiple modulesPedro Artigas
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171475 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Add section information for the DWARF5 split debug proposalEric Christopher
string offset section. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171474 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Move the loop vectorizer from O2 to O3. It looks like the increase in code ↵Nadav Rotem
size actually hurts the performance on many programs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171471 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04LoopVectorizer:Nadav Rotem
1. Add code to estimate register pressure. 2. Add code to select the unroll factor based on register pressure. 3. Add bits to TargetTransformInfo to provide the number of registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171469 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Revert revision: 171467. This transformation is incorrect and makes some ↵Nadav Rotem
tests fail. Original message: Simplified TRUNCATE operation that comes after SETCC. It is possible since SETCC result is 0 or -1. Added a test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171468 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03Simplified TRUNCATE operation that comes after SETCC. It is possible since ↵Elena Demikhovsky
SETCC result is 0 or -1. Added a test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171467 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03Revert "Mark DIV/IDIV instructions hasSideEffects=1 because they can trap ↵Michael Gottesman
when dividing by 0. This is needed to keep early if conversion from moving them across basic blocks." This reverts commit r171461 since it breaks the following tests: Clang :: Analysis/outofbound-notwork.c Clang :: Analysis/string-fail.c Clang :: CXX/basic/basic.lookup/basic.lookup.qual/p6-0x.cpp Clang :: CXX/basic/basic.lookup/basic.lookup.unqual/p15.cpp Clang :: CXX/dcl.dcl/dcl.spec/dcl.fct.spec/p4.cpp Clang :: CXX/dcl.dcl/dcl.spec/dcl.stc/p10.cpp Clang :: CXX/temp/temp.param/p14.cpp Clang :: CXX/temp/temp.res/temp.dep.res/temp.point/p1.cpp Clang :: CodeGen/2009-02-13-zerosize-union-field-ppc.c Clang :: CodeGen/blocks-2.c Clang :: CodeGen/libcalls-d.c Clang :: CodeGen/libcalls-ld.c Clang :: CodeGenCXX/conversion-function.cpp Clang :: CodeGenCXX/debug-info-limit-type.cpp Clang :: CodeGenCXX/inheriting-constructor.cpp Clang :: FixIt/fixit-errors.c Clang :: FixIt/fixit-pmem.cpp Clang :: Modules/namespaces.cpp Clang :: PCH/changed-files.c Clang :: PCH/pr4489.c Clang :: PCH/source-manager-stack.c Clang :: Parser/cxx-ambig-decl-expr-xfail.cpp Clang :: SemaCXX/switch-implicit-fallthrough-cxx98.cpp Clang :: SemaTemplate/instantiate-function-1.mm git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171466 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03Changed two debug statements that state that a queue had finished being ↵Michael Gottesman
processed when said queue was really a list to state a list had finished being processed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171465 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03Added DEBUG message for ObjCARC when we zap a push/pop pair in ↵Michael Gottesman
ObjCARCAPElim::OptimizeBB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171464 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03Added DEBUG message to ObjCARC when we transform objc_initWeak(p, null) => ↵Michael Gottesman
*p = null. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171463 91177308-0d34-0410-b5e6-96231b3b80d8
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