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* Have the SjLjEHPrepare pass do some more heavy lifting.Bill Wendling2011-09-281-34/+55
| | | | | | | | Upon further review, most of the EH code should remain written at the IR level. The part which breaks SSA form is the dispatch table, so that part will be moved to the back-end. llvm-svn: 140730
* A typeid of zero means a cleanup, not a catch. This case occursDuncan Sands2011-09-281-2/+4
| | | | | | when there is both a catch and a cleanup. Correct the comment. llvm-svn: 140686
* Strip off pointer casts when looking at the eh.sjlj.functioncontext's argument.Bill Wendling2011-09-281-1/+2
| | | | llvm-svn: 140678
* Bitcast the alloca to an i8* to match the intrinsic's signature.Bill Wendling2011-09-281-1/+4
| | | | llvm-svn: 140677
* Create and use an llvm.eh.sjlj.functioncontext intrinsic.Bill Wendling2011-09-282-0/+14
| | | | | | | | This intrinsic is used to pass the index of the function context to the back-end for further processing. The back-end is in charge of filling in the rest of the entries. llvm-svn: 140676
* In the new EH model, setup the function context and the call site info.Bill Wendling2011-09-281-1/+181
| | | | | | | | | | | | The DWARF exception pass uses the call site information, which is set up here. A pre-RA pass is too late for it to use this information. So create and setup the function context here, and then insert the call site values here (and map the call sites for the DWARF EH pass). This is simpler than the original pass, and doesn't make the CFG lose its SSA-ness. It's a win-win-win-win-lose-win-win situation. llvm-svn: 140675
* Don't conditionalize execution of the SjLj EH prepare pass.Bill Wendling2011-09-281-5/+1
| | | | | | | We may need an SjLj EH preparation pass for some call site information, at least in the short term. llvm-svn: 140674
* Rename class and clean up source.Jakob Stoklund Olesen2011-09-281-25/+28
| | | | | | No functional change intended. llvm-svn: 140664
* Rename SSEDomainFix -> lib/CodeGen/ExecutionDepsFix.Jakob Stoklund Olesen2011-09-282-0/+521
| | | | | | I'll clean up the source in the next commit. llvm-svn: 140663
* This is the start of the new SjLj EH preparation pass, which will replace theBill Wendling2011-09-271-1/+5
| | | | | | | | | | | | | | | | | | | current IR-level pass. The old SjLj EH pass has some problems, especially with the new EH model. Most significantly, it violates some of the new restrictions the new model has. For instance, the 'dispatch' table wants to jump to the landing pad, but we cannot allow that because only an invoke's unwind edge can jump to a landing pad. This requires us to mangle the code something awful. In addition, we need to keep the now dead landingpad instructions around instead of CSE'ing them because the DWARF emitter uses that information (they are dead because no control flow edge will execute them - the control flow edge from an invoke's unwind is superceded by the edge coming from the dispatch). Basically, this pass belongs not at the IR level where SSA is king, but at the code-gen level, where we have more flexibility. llvm-svn: 140646
* Remove an invalid assert that is really just asserting when the scheduler emitsCameron Zwarich2011-09-271-1/+0
| | | | | | a suboptimal schedule. llvm-svn: 140643
* Rename AddSelectionDAGCSEId() to addSelectionDAGCSEId().Jim Grosbach2011-09-271-2/+2
| | | | | | Naming conventions consistency. No functional change. llvm-svn: 140636
* Cleanup PromoteIntOp_EXTRACT_VECTOR_ELT and PromoteIntRes_SETCC.Nadav Rotem2011-09-272-10/+12
| | | | | | Add a new method: getAnyExtOrTrunc and use it to replace the manual check. llvm-svn: 140603
* Revert r140463; The patch assumes that <4 x i1> is saved to memory as 4 x i8,Nadav Rotem2011-09-271-10/+1
| | | | | | while the decision is to bit-pack small values. llvm-svn: 140601
* Fix emission of debug data for global variables. getContext() on ↵James Molloy2011-09-261-2/+2
| | | | | | DIGlobalVariables is not valid any more. llvm-svn: 140539
* Add target hook for pseudo instruction expansion.Jakob Stoklund Olesen2011-09-251-7/+16
| | | | | | | | | | | | Many targets use pseudo instructions to help register allocation. Like the COPY instruction, these pseudos can be expanded after register allocation. The early expansion can make life easier for PEI and the post-ra scheduler. This patch adds a hook that is called for all remaining pseudo instructions from the ExpandPostRAPseudos pass. llvm-svn: 140472
* [vector-select] Address one of the issues in pr10902. EXTRACT_VECTOR_ELEMENTNadav Rotem2011-09-251-2/+7
| | | | | | | | | SDNodes may return values which are wider than the incoming element types. In this patch we fix the integer promotion of these nodes. Fixes spill-q.ll when running -promote-elements. llvm-svn: 140471
* Clean up code after renaming LowerSubregs -> ExpandPostRAPseudos.Jakob Stoklund Olesen2011-09-252-45/+42
| | | | | | No functional change intended. llvm-svn: 140470
* Rename LowerSubregs to ExpandPostRAPseudos.Jakob Stoklund Olesen2011-09-252-1/+1
| | | | | | | | | | | | | | I'll fix the file contents in the next commit. This pass is currently expanding the COPY and SUBREG_TO_REG pseudos. I am going to add a hook so targets can expand more pseudo-instructions after register allocation. Many targets have pseudo-instructions that assist the register allocator. They can be expanded after register allocation, before PEI and PostRA scheduling. llvm-svn: 140469
* Implement Duncan's suggestion to use the result of getSetCCResultType if it ↵Nadav Rotem2011-09-241-4/+9
| | | | | | | | | | is legal (this is always the case for scalars), otherwise use the promoted result type. Fix test/CodeGen/X86/vsplit-and.ll when promote-elements is enabled. llvm-svn: 140464
* [Vector-Select] Address one of the problems in 10902.Nadav Rotem2011-09-241-1/+10
| | | | | | | | | | When generating the trunc-store of i1's, we need to use the vector type and not the scalar type. This patch fixes the assertion in CodeGen/Generic/bool-vector.ll when running with -promote-elements. llvm-svn: 140463
* Verify that terminators follow non-terminators.Jakob Stoklund Olesen2011-09-231-0/+13
| | | | | | This exposes a -segmented-stacks bug. llvm-svn: 140429
* PR10998: It is not legal to sink an instruction past the terminator of a ↵Eli Friedman2011-09-231-1/+9
| | | | | | block; make sure we don't do that. llvm-svn: 140428
* Tweak the handling of MERGE_VALUES nodes: remove the need forDuncan Sands2011-09-236-51/+43
| | | | | | | | | DecomposeMERGE_VALUES to "know" that results are legalized in a particular order, by passing it the number of the result being legalized (the type legalization core provides this, it just needs to be passed on). llvm-svn: 140373
* Vector-Select: Address one of the problems in pr10902. Add handling for theNadav Rotem2011-09-232-0/+43
| | | | | | | | | | integer-promotion of CONCAT_VECTORS. Test: test/CodeGen/X86/widen_shuffle-1.ll This patch fixes the above tests (when running in with -promote-elements). llvm-svn: 140372
* Fix SimplifySelectCC to add newly created nodes to the DAGCombinerDan Gohman2011-09-221-0/+3
| | | | | | worklist, as it may be possible to perform further optimization on them. llvm-svn: 140349
* Constrain register classes instead of emitting copies.Jakob Stoklund Olesen2011-09-221-3/+5
| | | | | | | | | | | Sometimes register class constraints are trivial, like GR32->GR32_NOSP, or GPR->rGPR. Teach InstrEmitter to simply constrain the virtual register instead of emitting a copy in these cases. Normally, these copies are handled by the coalescer. This saves some coalescer work. llvm-svn: 140340
* Add a MinNumRegs argument to MRI::constrainRegClass().Jakob Stoklund Olesen2011-09-221-4/+6
| | | | | | | | | | | The function will refuse to use a register class with fewer registers than MinNumRegs. This can be used by clients to avoid accidentally increase register pressure too much. The default value of MinNumRegs=0 doesn't affect how constrainRegClass() works. llvm-svn: 140339
* Use the C personality function instead of the C++ personality function.Bill Wendling2011-09-221-3/+1
| | | | llvm-svn: 140318
* Do not unnecessarily use AT_specification DIE because it does not add any value.Devang Patel2011-09-211-1/+1
| | | | | | Few weeks ago, llvm completely inverted the debug info graph. Earlier each debug info node used to keep track of its compile unit, now compile unit keeps track of important nodes. One impact of this change is that the global variable's do not have any context, which should be checked before deciding to use AT_specification DIE. llvm-svn: 140282
* Attempt to update the shadow stack GC pass to the new EH model.Bill Wendling2011-09-211-5/+17
| | | | | | | This inserts a cleanup landingpad instruction and a resume to mimic the old unwind instruction. llvm-svn: 140277
* Tidy up. Whitepsace.Jim Grosbach2011-09-211-3/+3
| | | | llvm-svn: 140275
* [VECTOR-SELECT] Address one of the bugs in pr10902.Nadav Rotem2011-09-211-0/+2
| | | | | | | Vector SetCC result types need to be type-legalized. This code worked before because scalar result types are known to be legal. llvm-svn: 140249
* Lower ARM adds/subs to add/sub after adding optional CPSR operand.Andrew Trick2011-09-213-6/+8
| | | | | | | | | | | | | This is still a hack until we can teach tblgen to generate the optional CPSR operand rather than an implicit CPSR def. But the strangeness is now limited to the selection DAG. ADD/SUB MI's no longer have implicit CPSR defs, nor do we allow flag setting variants of these opcodes in machine code. There are several corner cases to consider, and getting one wrong would previously lead to nasty miscompilation. It's not the first time I've debugged one, so this time I added enough verification to ensure it won't happen again. llvm-svn: 140228
* Add a DAGCombine for subvector extracts to remove useless chains ofBruno Cardoso Lopes2011-09-201-0/+32
| | | | | | | subvector inserts and extracts. Initial patch by Rackover, Zvi with some tweak done by me. llvm-svn: 140204
* Restore hasPostISelHook tblgen flag.Andrew Trick2011-09-202-2/+8
| | | | | | | | | | No functionality change. The hook makes it explicit which patterns require "special" handling. i.e. it self-documents tblgen deficiencies. I plan to add verification in ExpandISelPseudos and Thumb2SizeReduce to catch any missing hasPostISelHooks. Otherwise it's too fragile. llvm-svn: 140160
* ARM isel bug fix for adds/subs operands.Andrew Trick2011-09-202-8/+2
| | | | | | | | | | | Modified ARMISelLowering::AdjustInstrPostInstrSelection to handle the full gamut of CPSR defs/uses including instructins whose "optional" cc_out operand is not really optional. This allowed removal of the hasPostISelHook to simplify the .td files and make the implementation more robust. Fixes rdar://10137436: sqlite3 miscompile llvm-svn: 140134
* whitespaceAndrew Trick2011-09-202-30/+30
| | | | llvm-svn: 140133
* white space cleanupsNadav Rotem2011-09-181-5/+4
| | | | llvm-svn: 139994
* Namespacify.Benjamin Kramer2011-09-161-0/+2
| | | | llvm-svn: 139892
* Spill mode: Hoist back-copies locally.Jakob Stoklund Olesen2011-09-161-6/+17
| | | | | | | | | | | | | | | | | The leaveIntvAfter() function normally inserts a back-copy after the requested instruction, making the back-copy kill the live range. In spill mode, try to insert the back-copy before the last use instead. That means the last use becomes the kill instead of the back-copy. This lowers the register pressure because the last use can now redefine the same register it was reading. This will also improve compile time: The back-copy isn't a kill, so hoisting it in hoistCopiesForSize() won't force a recomputation of the source live range. Similarly, if the back-copy isn't hoisted by the splitter, the spiller will not attempt hoisting it locally. llvm-svn: 139883
* Disable local spill hoisting for non-killing copies.Jakob Stoklund Olesen2011-09-161-5/+15
| | | | | | | | If the source register is live after the copy being spilled, there is no point to hoisting it. Hoisting inside a basic block only serves to resolve interferences by shortening the live range of the source. llvm-svn: 139882
* Some legalization fixes for atomic load and store.Eli Friedman2011-09-153-1/+29
| | | | llvm-svn: 139851
* Add an option to disable spill hoisting.Jakob Stoklund Olesen2011-09-151-1/+5
| | | | | | | | When -split-spill-mode is enabled, spill hoisting is performed by SplitKit instead of by InlineSpiller. This hidden command line option is for testing the splitter spill mode. llvm-svn: 139845
* VirtRegMap is counting spill slots, not register spills.Jakob Stoklund Olesen2011-09-151-3/+3
| | | | | | Fix the stats counters to reflect that. llvm-svn: 139819
* Count correctly when a COPY turns into a spill or reload.Jakob Stoklund Olesen2011-09-151-1/+7
| | | | | | | The number of spills could go negative since a folded COPY is just a spill, and it may be eliminated. llvm-svn: 139815
* Count inserted spills and reloads more accurately.Jakob Stoklund Olesen2011-09-151-14/+22
| | | | | | | | Adjust counters when removing spill and reload instructions. We still don't account for reloads being removed by eliminateDeadDefs(). llvm-svn: 139806
* Trace through sibling PHIs in bulk.Jakob Stoklund Olesen2011-09-151-23/+50
| | | | | | | | | | | | | | | When traceSiblingValue() encounters a PHI-def value created by live range splitting, don't look at all the predecessor blocks. That can be very expensive in a complicated CFG. Instead, consider that all the non-PHI defs jointly dominate all the PHI-defs. Tracing directly to all the non-PHI defs is much faster that zipping around in the CFG when there are many PHIs with many predecessors. This significantly improves compile time for indirectbr interpreters. llvm-svn: 139797
* Speed up LiveIntervals::shrinkToUse with some caching.Jakob Stoklund Olesen2011-09-151-6/+8
| | | | | | | | | | | | | Blocks with multiple PHI successors only need to go on the worklist once. Use a SmallPtrSet to track the live-out blocks that have already been handled. This is a lot faster than the two live range check we would otherwise do. Also stop recomputing hasPHIKill flags. Like RenumberValues(), it is conservatively correct to leave them in, and they are not used for anything important. llvm-svn: 139792
* Revert r139782, "RemoveCopyByCommutingDef doesn't need hasPHIKill()."Jakob Stoklund Olesen2011-09-151-8/+8
| | | | | | | | | | It does, after all. RemoveCopyByCommutingDef rewrites the uses of one particular value number in A. It doesn't know how to rewrite phi uses, so there can't be any. llvm-svn: 139787
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