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* Eliminate MachineBasicBlock::const_livein_iterator and makeDan Gohman2010-04-131-4/+5
| | | | | | | | | MachineBasicBlock::livein_iterator a const_iterator, because clients shouldn't ever be using the iterator interface to mutate the livein set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101147 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r100056. It doesn't look like it's the one that's causing a failure.Bill Wendling2010-04-011-35/+23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100065 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r100056. It was causing a failure on MSVC.Bill Wendling2010-03-311-23/+35
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100062 91177308-0d34-0410-b5e6-96231b3b80d8
* Rewrite CorrectExtraCFGEdges() to make it more understandable.Bill Wendling2010-03-311-35/+23
| | | | | | | | | | | * Set the "DestA" and "DestB" according to how they're understood by the method. I.e., if one or both of them should point to the "fall through" block, then point to the fall through block. * Improve the loop that removes superfluous edges to be more understandable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100056 91177308-0d34-0410-b5e6-96231b3b80d8
* Rip out the 'is temporary' nonsense from the MCContext interface toChris Lattner2010-03-301-3/+3
| | | | | | | | | | create symbols. It is extremely error prone and a source of a lot of the remaining integrated assembler bugs on x86-64. This fixes rdar://7807601. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99902 91177308-0d34-0410-b5e6-96231b3b80d8
* eliminate the now-unneeded context argument of MBB::getSymbol()Chris Lattner2010-03-131-2/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98451 91177308-0d34-0410-b5e6-96231b3b80d8
* set the temporary bit on MCSymbols correctly.Chris Lattner2010-03-101-5/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98124 91177308-0d34-0410-b5e6-96231b3b80d8
* move isOnlyReachableByFallthrough out of MachineBasicBlock into AsmPrinter,Chris Lattner2010-02-171-30/+0
| | | | | | | | and add a sparc implementation that knows about delay slots. Patch by Nathan Keynes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96492 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix comments to reflect renaming elsewhere.Dale Johannesen2010-02-101-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95730 91177308-0d34-0410-b5e6-96231b3b80d8
* move target-independent opcodes out of TargetInstrInfoChris Lattner2010-02-091-2/+1
| | | | | | | | | | into TargetOpcodes.h. #include the new TargetOpcodes.h into MachineInstr. Add new inline accessors (like isPHI()) to MachineInstr, and start using them throughout the codebase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95687 91177308-0d34-0410-b5e6-96231b3b80d8
* add a new MachineBasicBlock::getSymbol method, replacingChris Lattner2010-01-261-1/+16
| | | | | | | the AsmPrinter::GetMBBSymbol. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94515 91177308-0d34-0410-b5e6-96231b3b80d8
* make findDebugLoc a class methodDale Johannesen2010-01-201-9/+11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94032 91177308-0d34-0410-b5e6-96231b3b80d8
* Move findDebugLoc somewhere more central. FixDale Johannesen2010-01-201-0/+17
| | | | | | | | | more cases where debug declarations affect debug line info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93953 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't make changes to the MBB in MachineBasicBlock::canFallThrough().Jakob Stoklund Olesen2010-01-151-1/+1
| | | | | | | This fixes the regression for -pre-regalloc-taildup in MultiSource/Applications/lambda-0.1.3. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93541 91177308-0d34-0410-b5e6-96231b3b80d8
* Change errs() to dbgs().David Greene2010-01-041-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92542 91177308-0d34-0410-b5e6-96231b3b80d8
* Helpful comment added. Some code cleanup. No functional change.Bill Wendling2009-12-161-11/+27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91479 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert these. They may have been causing 483_xalancbmk to fail:Bill Wendling2009-12-151-29/+7
| | | | | | | | | | | | | | | | | | | | | | $ svn merge -c -91161 https://llvm.org/svn/llvm-project/llvm/trunk --- Reverse-merging r91161 into '.': U lib/CodeGen/BranchFolding.cpp U lib/CodeGen/MachineBasicBlock.cpp $ svn merge -c -91113 https://llvm.org/svn/llvm-project/llvm/trunk --- Reverse-merging r91113 into '.': G lib/CodeGen/MachineBasicBlock.cpp $ svn merge -c -91101 https://llvm.org/svn/llvm-project/llvm/trunk --- Reverse-merging r91101 into '.': U include/llvm/CodeGen/MachineBasicBlock.h G lib/CodeGen/MachineBasicBlock.cpp $ svn merge -c -91092 https://llvm.org/svn/llvm-project/llvm/trunk --- Reverse-merging r91092 into '.': G include/llvm/CodeGen/MachineBasicBlock.h G lib/CodeGen/MachineBasicBlock.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91376 91177308-0d34-0410-b5e6-96231b3b80d8
* Whitespace changes, comment clarification. No functional changes.Bill Wendling2009-12-141-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91274 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't try to move a MBB into the fall-through position if it's a landing pad orBill Wendling2009-12-111-10/+3
| | | | | | | | | | | | | | | branches only to a landing pad. Without this check, the compiler would go into an infinite loop because the branch to a landing pad is an "abnormal" edge which wasn't being taken into account. This is the meat of that fix: if (!PrevBB.canFallThrough() && !MBB->BranchesToLandingPad(MBB)) { The other stuff is simplification of the "branches to a landing pad" code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91161 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert part of r91101 which was causing an infinite loop in the self-hostingBill Wendling2009-12-111-3/+8
| | | | | | | build bots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91113 91177308-0d34-0410-b5e6-96231b3b80d8
* Address comments on last patch:Bill Wendling2009-12-111-13/+8
| | | | | | | | | - Loosen the restrictions when checking of it branches to a landing pad. - Make the loop more efficient by checking the '.insert' return value. - Do cheaper checks first. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91101 91177308-0d34-0410-b5e6-96231b3b80d8
* A machine basic block may end in an unconditional branch, however it may haveBill Wendling2009-12-111-7/+36
| | | | | | | | | | | | | | more than one successor. Normally, these extra successors are dead. However, some of them may branch to exception handling landing pads. If we remove those successors, then the landing pads could go away if all predecessors to it are removed. Before, it was checking if the direct successor was the landing pad. But it could be the result of jumping through multiple basic blocks to get to it. If we were to only check for the existence of an EH_LABEL in the basic block and not remove successors if it's in there, then it could stop actually dead basic blocks from being removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91092 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify this code: don't call AnalyzeBranch before doing simpler checks.Dan Gohman2009-12-051-13/+13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90633 91177308-0d34-0410-b5e6-96231b3b80d8
* improve portability to avoid conflicting with std::next in c++'0x.Chris Lattner2009-12-031-3/+4
| | | | | | | Patch by Howard Hinnant! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
* Split tail duplication into a separate pass. This is needed to avoidBob Wilson2009-11-261-0/+45
| | | | | | | | | | running tail duplication when doing branch folding for if-conversion, and we also want to be able to run tail duplication earlier to fix some reg alloc problems. Move the CanFallThrough function from BranchFolding to MachineBasicBlock so that it can be shared by TailDuplication. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89904 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach MachineBasicBlock::updateTerminator() to handle a failing ↵Jakob Stoklund Olesen2009-11-221-2/+8
| | | | | | | | | TII->ReverseBranchCondition(Cond) call. This fixes the MallocBench/cfrac test case regression. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89608 91177308-0d34-0410-b5e6-96231b3b80d8
* Add MachineBasicBlock::getName, and use it in place of getBasicBlock()->getName.Jakob Stoklund Olesen2009-11-201-0/+7
| | | | | | Fix debug code that assumes getBasicBlock never returns NULL. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89428 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a WriteAsOperand for MachineBasicBlock so MachineLoopInfo dump looks sane.Evan Cheng2009-11-171-0/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89130 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the utility function UpdateTerminator() from CodePlacementOpt() intoJim Grosbach2009-11-121-0/+53
| | | | | | | | MachineBasicBlock so other passes can utilize it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86947 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for tail duplication to BranchFolding, and extendDan Gohman2009-11-111-4/+1
| | | | | | | | | | | | tail merging support to handle more cases. - Recognize several cases where tail merging is beneficial even when the tail size is smaller than the generic threshold. - Make use of MachineInstrDesc::isBarrier to help detect non-fallthrough blocks. - Check for and avoid disrupting fall-through edges in more cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86871 91177308-0d34-0410-b5e6-96231b3b80d8
* Make -print-machineinstrs more readable.Dan Gohman2009-10-311-13/+18
| | | | | | | | | | | | | | | - Be consistent when referring to MachineBasicBlocks: BB#0. - Be consistent when referring to virtual registers: %reg1024. - Be consistent when referring to unknown physical registers: %physreg10. - Be consistent when referring to known physical registers: %RAX - Be consistent when referring to register 0: %reg0 - Be consistent when printing alignments: align=16 - Print jump table contents. - Don't print host addresses, in general. - and various other cleanups. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85682 91177308-0d34-0410-b5e6-96231b3b80d8
* Mention if a block has its address taken in debug output.Dan Gohman2009-10-301-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85571 91177308-0d34-0410-b5e6-96231b3b80d8
* Initial target-independent CodeGen support for BlockAddresses.Dan Gohman2009-10-301-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85556 91177308-0d34-0410-b5e6-96231b3b80d8
* remove std::ostream versions of printing stuff for MBB and MF,Chris Lattner2009-08-231-10/+1
| | | | | | | upgrading a few things to use raw_ostream git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79811 91177308-0d34-0410-b5e6-96231b3b80d8
* remove dead PrefixPrinter class.Chris Lattner2009-08-231-6/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79796 91177308-0d34-0410-b5e6-96231b3b80d8
* random cleanups.Chris Lattner2009-08-231-25/+24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79794 91177308-0d34-0410-b5e6-96231b3b80d8
* fix another bozo bugChris Lattner2009-08-181-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79313 91177308-0d34-0410-b5e6-96231b3b80d8
* fix accidentally inverted conditional and add comment.Chris Lattner2009-08-181-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79312 91177308-0d34-0410-b5e6-96231b3b80d8
* turn this conditional into something humans might actuallyChris Lattner2009-08-181-8/+25
| | | | | | | be able to understand ;-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79311 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-apply LiveInterval index dumping patch, with fixes suggested by BillDavid Greene2009-08-031-4/+6
| | | | | | | and others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78003 91177308-0d34-0410-b5e6-96231b3b80d8
* Move more to raw_ostream, provide support for writing MachineBasicBlock,Daniel Dunbar2009-07-241-1/+11
| | | | | | | LiveInterval, etc to raw_ostream. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76965 91177308-0d34-0410-b5e6-96231b3b80d8
* revert r76602, 76603, and r76615, pending design discussions.Chris Lattner2009-07-211-3/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76646 91177308-0d34-0410-b5e6-96231b3b80d8
* Add PrefixPrinter arguments to the dump routines for MachineFunction andDavid Greene2009-07-211-1/+3
| | | | | | | MachineBasicBlock. We'll use these shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76603 91177308-0d34-0410-b5e6-96231b3b80d8
* If a MachineBasicBlock has multiple ways of reaching another block,Dan Gohman2009-05-051-4/+2
| | | | | | | | | allow it to have multiple CFG edges to that block. This is needed to allow MachineBasicBlock::isOnlyReachableByFallthrough to work correctly. This fixes PR4126. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71018 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply 68073, with fixes. EH Landing-pad basic blocks are notDan Gohman2009-03-311-0/+10
| | | | | | | | | entered via fall-through. Don't miss fallthroughs from blocks terminated by conditional branches. Also, move isOnlyReachableByFallthrough out of line. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68129 91177308-0d34-0410-b5e6-96231b3b80d8
* Constify arguments in isSuccessor and isLayoutSuccessor.Dan Gohman2009-03-301-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68054 91177308-0d34-0410-b5e6-96231b3b80d8
* Delete unnecessary parens around return values.Dan Gohman2009-01-081-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61950 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch the MachineOperand accessors back to the short names likeDan Gohman2008-10-031-1/+1
| | | | | | | isReg, etc., from isRegister, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a new MachineBasicBlock utility function, isLayoutSuccessor, thatDan Gohman2008-10-021-0/+5
| | | | | | | | can be used when deciding if a block can transfer control to another via a fall-through instead of a branch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56968 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove isImm(), isReg(), and friends, in favor of Dan Gohman2008-09-131-1/+2
| | | | | | | | | | isImmediate(), isRegister(), and friends, to avoid confusion about having two different names with the same meaning. I'm not attached to the longer names, and would be ok with changing to the shorter names if others prefer it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56189 91177308-0d34-0410-b5e6-96231b3b80d8
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