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path: root/lib/CodeGen/MachineBasicBlock.cpp
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2011-05-29Fix PR10046 by updating LiveVariables kill info when splitting live ranges.Jakob Stoklund Olesen
This only affects targets like Mips where branch instructions may kill virtual registers. Most other targets branch on flag values, so virtual registers are not involved. The problem is that MachineBasicBlock::updateTerminator deletes branches and inserts new ones while LiveVariables keeps a list of pointers to instructions that kill virtual registers. That list wasn't properly updated in MBB::SplitCriticalEdge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132298 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-18Simplify declarations slightly by using typedefs.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129720 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-04Add LiveIntervals::getLastSplitPoint().Jakob Stoklund Olesen
A live range cannot be split everywhere in a basic block. A split must go before the first terminator, and if the variable is live into a landing pad, the split must happen before the call that can throw. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124894 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14Try for the third time to teach getFirstTerminator() about debug values.Jakob Stoklund Olesen
This time let's rephrase to trick gcc-4.3 into not miscompiling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123432 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14Revert r123419. It still breaks llvm-gcc-i386-linux-selfhost.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123423 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14Try again to teach getFirstTerminator() about debug values.Jakob Stoklund Olesen
Fix some callers to better deal with debug values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123419 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13Teach frame lowering to ignore debug values after the terminators.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123399 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13Speculatively revert r123384 to make llvm-gcc-i386-linux-selfhost buildbot ↵Devang Patel
happy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123389 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13Teach MachineBasicBlock::getFirstTerminator to ignore debug values.Jakob Stoklund Olesen
It will still return an iterator that points to the first terminator or end(), but there may be DBG_VALUE instructions following the first terminator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123384 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13Add missing space in debug outputJakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123351 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09Replace TargetRegisterInfo::printReg with a PrintReg class that also works ↵Jakob Stoklund Olesen
without a TRI instance. Print virtual registers numbered from 0 instead of the arbitrary FirstVirtualRegister. The first virtual register is printed as %vreg0. TRI::NoRegister is printed as %noreg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123107 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-02Don't try to split weird critical edges that really aren't:Jakob Stoklund Olesen
BB#1: derived from LLVM BB %bb.nph28 Live Ins: %AL Predecessors according to CFG: BB#0 TEST8rr %reg16384<kill>, %reg16384, %EFLAGS<imp-def>; GR8:%reg16384 JNE_4 <BB#2>, %EFLAGS<imp-use,kill> JMP_4 <BB#2> Successors according to CFG: BB#2 BB#2 These double CFG edges only ever occur in bugpoint-generated code, so there is no need to attempt something clever. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117992 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-30Add SkipPHIsAndLabels from PHIElimination to MachineBasicBlock. It is neededJakob Stoklund Olesen
elsewhere. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117763 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-26Teach MachineBasicBlock::print() to annotate instructions and blocks withJakob Stoklund Olesen
SlotIndexes when available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117392 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19Properly update MachineDominators when splitting critical edge.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111574 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17Move the decision logic whether it's a good idea to split a critical edge to ↵Evan Cheng
clients. Also fixed an erroneous check. An edge is only a back edge when the from and to blocks are in the same loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111256 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17Fix debug message.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111250 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17PHI elimination should not break back edge. It can cause some significant ↵Evan Cheng
code placement issues. rdar://8263994 good: LBB0_2: mov r2, r0 . . . mov r1, r2 bne LBB0_2 bad: LBB0_2: mov r2, r0 . . . @ BB#3: mov r1, r2 b LBB0_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111221 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-07Add a getFirstNonPHI utility function.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107778 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06Reapply r107655 with fixes; insert the pseudo instruction intoDan Gohman
the block before calling the expansion hook. And don't put EFLAGS in a mbb's live-in list twice. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107691 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06Revert r107655.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107668 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06Fix a bunch of custom-inserter functions to handle the case whereDan Gohman
the pseudo instruction is not at the end of the block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107655 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-22Move PHIElimination's SplitCriticalEdge for MachineBasicBlocks outDan Gohman
into a utility routine, teach it how to update MachineLoopInfo, and make use of it in MachineLICM to split critical edges on demand. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106555 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-17Add a DebugLoc parameter to TargetInstrInfo::InsertBranch(). ThisStuart Hastings
addresses a longstanding deficiency noted in many FIXMEs scattered across all the targets. This effectively moves the problem up one level, replacing eleven FIXMEs in the targets with eight FIXMEs in CodeGen, plus one path through FastISel where we actually supply a DebugLoc, fixing Radar 7421831. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106243 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13Eliminate MachineBasicBlock::const_livein_iterator and makeDan Gohman
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
2010-04-01Reapply r100056. It doesn't look like it's the one that's causing a failure.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100065 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-31Revert r100056. It was causing a failure on MSVC.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100062 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-31Rewrite CorrectExtraCFGEdges() to make it more understandable.Bill Wendling
* 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
2010-03-30Rip out the 'is temporary' nonsense from the MCContext interface toChris Lattner
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
2010-03-13eliminate the now-unneeded context argument of MBB::getSymbol()Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98451 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-10set the temporary bit on MCSymbols correctly.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98124 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17move isOnlyReachableByFallthrough out of MachineBasicBlock into AsmPrinter,Chris Lattner
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
2010-02-10Fix comments to reflect renaming elsewhere.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95730 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-09move target-independent opcodes out of TargetInstrInfoChris Lattner
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
2010-01-26add a new MachineBasicBlock::getSymbol method, replacingChris Lattner
the AsmPrinter::GetMBBSymbol. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94515 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-20make findDebugLoc a class methodDale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94032 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-20Move findDebugLoc somewhere more central. FixDale Johannesen
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
2010-01-15Don't make changes to the MBB in MachineBasicBlock::canFallThrough().Jakob Stoklund Olesen
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
2010-01-04Change errs() to dbgs().David Greene
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92542 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-16Helpful comment added. Some code cleanup. No functional change.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91479 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-15Revert these. They may have been causing 483_xalancbmk to fail:Bill Wendling
$ 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
2009-12-14Whitespace changes, comment clarification. No functional changes.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91274 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11Don't try to move a MBB into the fall-through position if it's a landing pad orBill Wendling
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
2009-12-11Revert part of r91101 which was causing an infinite loop in the self-hostingBill Wendling
build bots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91113 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11Address comments on last patch:Bill Wendling
- 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
2009-12-11A machine basic block may end in an unconditional branch, however it may haveBill Wendling
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
2009-12-05Simplify this code: don't call AnalyzeBranch before doing simpler checks.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90633 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03improve portability to avoid conflicting with std::next in c++'0x.Chris Lattner
Patch by Howard Hinnant! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Split tail duplication into a separate pass. This is needed to avoidBob Wilson
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
2009-11-22Teach MachineBasicBlock::updateTerminator() to handle a failing ↵Jakob Stoklund Olesen
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
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