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2013-02-12Don't consider definitions by other PHIs live-in when trimming a PHI source'sCameron Zwarich
live range after inserting a copy at the end of a block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174945 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12Fix indentation.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174944 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12Add a hidden option to PHIElimination to split all critical edges. This isCameron Zwarich
particularly useful for catching issues with architectures that have exotic terminators like MIPS. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174938 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12Add blocks to the LiveIntervalAnalysis RegMaskBlocks array when splittingCameron Zwarich
a critical edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174936 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12Fix the updating of LiveIntervals after splitting a critical edge. PHI operandCameron Zwarich
live ranges should always be extended, and the only successor that should be considered for extension of other ranges is the target of the split edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174935 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12Check type for legality before forming a select from loads.Pete Cooper
Sorry for the lack of a test case. I tried writing one for i386 as i know selects are illegal on this target, but they are actually considered legal by isel and expanded later. I can't see any targets to trigger this, but checking for the legality of a node before forming it is general goodness. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174934 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-11Add support for updating LiveIntervals to ↵Cameron Zwarich
MachineBasicBlock::SplitCriticalEdge(). This is currently a bit hairier than it needs to be, since depending on where the split block resides the end ListEntry of the split block may be the end ListEntry of the original block or a new entry. Some changes to the SlotIndexes updating should make it possible to eliminate the two cases here. This also isn't as optimized as it could be. In the future Liveinterval should probably get a flag that indicates whether the LiveInterval is within a single basic block. We could ignore all such intervals when splitting an edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174870 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-11Update SlotIndexes after updateTerminator() possibly removes instructions. I amCameron Zwarich
really trying to avoid piping SlotIndexes through to RemoveBranch() and friends. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174869 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-11Revert "Rename LLVMContext diagnostic handler types and functions."Bob Wilson
This reverts my commit 171047. Now that I've removed my misguided attempt to support backend warnings, these diagnostics are only about inline assembly. It would take quite a bit more work to generalize them properly, so I'm just reverting this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174860 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-11Currently, codegen may spent some time in SDISel passes even if an entireEvan Cheng
function is successfully handled by fast-isel. That's because function arguments are *always* handled by SDISel. Introduce FastLowerArguments to allow each target to provide hook to handle formal argument lowering. As a proof-of-concept, add ARMFastIsel::FastLowerArguments to handle functions with 4 or fewer scalar integer (i8, i16, or i32) arguments. It completely eliminates the need for SDISel for trivial functions. rdar://13163905 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174855 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-11Remove unnecessary code.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174854 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10Fix the unused but nearly correct method SlotIndexes::insertMBBInMaps() and addCameron Zwarich
support for updating SlotIndexes to MachineBasicBlock::SplitCriticalEdge(). This calls renumberIndexes() every time; it should be improved to only renumber locally. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174851 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10Abstract the liveness checking in PHIElimination::SplitPHIEdges() to supportCameron Zwarich
both LiveVariables and LiveIntervals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174850 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10Add support for updating LiveIntervals to PHIElimination. If LiveIntervals areCameron Zwarich
present, it currently verifies them with the MachineVerifier, and this passed all of the test cases in 'make check' (when accounting for existing verifier errors). There were some assertion failures in the two-address pass, but they also happened on code without phis and look like they are caused by different kill flags from LiveIntervals. The only part that doesn't work is the critical edge splitting heuristic, because there isn't currently an efficient way to update LiveIntervals after splitting an edge. I'll probably start by implementing the slow fallback and test that it works before tackling the fast path for single-block ranges. The existing code that updates LiveVariables is fairly slow as it is. There isn't a command-line option for enabling this; instead, just edit PHIElimination.cpp to require LiveIntervals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174831 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10Fix a typo.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174830 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10Remove ancient references to 'atomic' phis in PHIElimination that don't reallyCameron Zwarich
make sense anymore. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174829 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10Make LiveVariables an instance variable of PHIElimination.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174828 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09Remove unneeded "TargetMachine.h" #includes.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174817 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09Dwarf: do not use line_table_start in at_stmt_list since we do not always emit Manman Ren
line table entries in assembly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174785 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09Remove the old liveness algorithm.Jakob Stoklund Olesen
This is part of the plan to delete LiveVariables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174783 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08Turn on -new-live-intervals by default.Jakob Stoklund Olesen
This uses a liveness algorithm that does not depend on data from the LiveVariables analysis, it is the first step towards removing LiveVariables completely. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174774 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08Revert "Add LLVMContext::emitWarning methods and use them. ↵Bob Wilson
<rdar://problem/12867368>" This reverts r171041. This was a nice idea that didn't work out well. Clang warnings need to be associated with warning groups so that they can be selectively disabled, promoted to errors, etc. This simplistic patch didn't allow for that. Enhancing it to provide some way for the backend to specify a front-end warning type seems like overkill for the few uses of this, at least for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174748 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08DAGCombiner: Constant folding around pre-increment loads/storesHal Finkel
Previously, even when a pre-increment load or store was generated, we often needed to keep a copy of the original base register for use with other offsets. If all of these offsets are constants (including the offset which was combined into the addressing mode), then this is clearly unnecessary. This change adjusts these other offsets to use the new incremented address. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174746 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08Revert 172027 and 174336. Remove diagnostics about over-aligned stack objects.Bob Wilson
Aside from the question of whether we report a warning or an error when we can't satisfy a requested stack object alignment, the current implementation of this is not good. We're not providing any source location in the diagnostics and the current warning is not connected to any warning group so you can't control it. We could improve the source location somewhat, but we can do a much better job if this check is implemented in the front-end, so let's do that instead. <rdar://problem/13127907> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174741 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08ARM cost model: Address computation in vector mem ops not freeArnold Schwaighofer
Adds a function to target transform info to query for the cost of address computation. The cost model analysis pass now also queries this interface. The code in LoopVectorize adds the cost of address computation as part of the memory instruction cost calculation. Only there, we know whether the instruction will be scalarized or not. Increase the penality for inserting in to D registers on swift. This becomes necessary because we now always assume that address computation has a cost and three is a closer value to the architecture. radar://13097204 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174713 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-07"Clean up" line section symbol emission by emitting the sectionEric Christopher
syms before constructing the compile units so we're not emitting section references to sections not there already. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174663 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-06Clean up multiple skeleton compile units if we have multiple compileEric Christopher
units coming in. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174548 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-06Remove some dead code.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174547 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-06Tweak check to avoid integer overflow (for insanely large alignments)Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174482 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-06Attempt to recover gdb bot after r174445.Manman Ren
Failure: undefined symbol 'Lline_table_start0'. Root-cause: we use a symbol subtraction to calculate at_stmt_list, but the line table entries are not dumped in the assembly. Fix: use zero instead of a symbol subtraction for Compile Unit 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174479 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Dwarf: support for LTO where a single object file can have multiple line tablesManman Ren
We generate one line table for each compilation unit in the object file. Reviewed by Eric and Kevin. rdar://problem/13067005 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174445 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Reapply r174343, with a fix for a scary DAG combine bug where it failed to ↵Owen Anderson
differentiate between the alignment of the base point of a load, and the overall alignment of the load. This caused infinite loops in DAG combine with the original application of this patch. ORIGINAL COMMIT LOG: When the target-independent DAGCombiner inferred a higher alignment for a load, it would replace the load with one with the higher alignment. However, it did not place the new load in the worklist, which prevented later DAG combines in the same phase (for example, target-specific combines) from ever seeing it. This patch corrects that oversight, and updates some tests whose output changed due to slightly different DAGCombine outputs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174431 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Remove liveout lists from MachineRegisterInfo.Jakob Stoklund Olesen
All targets are now adding return value registers as implicit uses on return instructions, and there is no longer a need for the live out lists. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174417 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Remove special-casing of return blocks for liveness.Jakob Stoklund Olesen
Now that return value registers are return instruction uses, there is no need for special treatment of return blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174416 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Revert r174343, "When the target-independent DAGCombiner inferred a higher ↵NAKAMURA Takumi
alignment for a load," It caused hangups in compiling clang/lib/Parse/ParseDecl.cpp and clang/lib/Driver/Tools.cpp in stage2 on some hosts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174374 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Construct a skeleton cu for each compile unit in the module, not justEric Christopher
for the first compile unit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174352 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05Add support for emitting a stub DW_AT_GNU_dwo_id as part of theEric Christopher
DWARF5 split dwarf proposal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174350 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-05When the target-independent DAGCombiner inferred a higher alignment for a load,Owen Anderson
it would replace the load with one with the higher alignment. However, it did not place the new load in the worklist, which prevented later DAG combines in the same phase (for example, target-specific combines) from ever seeing it. This patch corrects that oversight, and updates some tests whose output changed due to slightly different DAGCombine outputs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174343 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-04[Stack Alignment] emit warning instead of a hard errorManman Ren
Per discussion in rdar://13127907, we should emit a hard error only if people write code where the requested alignment is larger than achievable and assumes the low bits are zeros. A warning should be good enough when we are not sure if the source code assumes the low bits are zeros. rdar://13127907 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174336 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-04SelectionDAG: Teach FoldConstantArithmetic how to deal with vectors.Benjamin Kramer
This required disabling a PowerPC optimization that did the following: input: x = BUILD_VECTOR <i32 16, i32 16, i32 16, i32 16> lowered to: tmp = BUILD_VECTOR <i32 8, i32 8, i32 8, i32 8> x = ADD tmp, tmp The add now gets folded immediately and we're back at the BUILD_VECTOR we started from. I don't see a way to fix this currently so I left it disabled for now. Fix some trivially foldable X86 tests too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174325 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-02rdar://13126763Shuxin Yang
Fix a bug in DAGCombine. The symptom is mistakenly optimizing expression "x + x*x" into "x * 3.0". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174239 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-02Correct indentation for dumping LexicalScope.Manman Ren
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174237 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-01[Dwarf] avoid emitting multiple AT_const_value for static memebers.Manman Ren
Testing case is reduced from MultiSource/BenchMarks/Prolangs-C++/deriv1. rdar://problem/13071590 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174235 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-01Fix errant fallthrough in the generation of the lifetime markers.Nadav Rotem
Found by Alexander Kornienko. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174207 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-01Use a continue to simplify loop and reduce indentation. No functional change.Chad Rosier
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174198 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31Add braces, so my head doesn't explode.Chad Rosier
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174088 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31When lowering memcpys to loads and stores, make sure we don't promote alignmentsLang Hames
past the natural stack alignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174085 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31[Dwarf] early exit to avoid creating dangling DIEsManman Ren
We used to create children DIEs for a scope, then check whether ScopeDIE is null. If ScopeDIE is null, the children DIEs will be dangling. Other DIEs can link to those dangling DIEs, which are not emitted at all, causing dwarf error. The current testing case is 4k lines, from MultiSource/BenchMark/McCat/09-vor. rdar://problem/13071959 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174084 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31[PEI] Pass the frame index operand number to the eliminateFrameIndex function.Chad Rosier
Each target implementation was needlessly recomputing the index. Part of rdar://13076458 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174083 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-29Add a special handling case for untyped CopyFromReg node in GetCostForDef() ↵Weiming Zhao
of ScheduleDAGRRList git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173833 91177308-0d34-0410-b5e6-96231b3b80d8
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