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2009-03-24more tidying: name the components of PhysReg in the case whenChris Lattner
the target constraint specifies a specific physreg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67618 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24Tidy a bit more.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67617 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24simplify this code a bit now that "allocation to a vreg class" can neverChris Lattner
fail. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67616 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24I was convinced that it's ok to allow a second i8 return valueDan Gohman
to be returned in DL. LLVM's multiple-return-value support is not ABI-conforming; front-ends that wish to have code emitted that conforms to an ABI are currently expected to make arrangements for this on their own rather than assuming that multiple-return-values will automatically do the right thing. This commit doesn't fundamentally change this situation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67588 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24Minor compile-time optimization; don't bother checkingDan Gohman
canClobberPhysRegDefs if the successor node doesn't clobber any physical registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67587 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24Add a pre-pass to the burr-list scheduler which makes adjustments toDan Gohman
help out the register pressure reduction heuristics in the case of nodes with multiple uses. Currently this uses very conservative heuristics, so it doesn't have a broad impact, but in cases where it does help it can make a big difference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67586 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24Do not emit comments unless -asm-verbose.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67580 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Use a SmallPtrSet instead of std::set.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67578 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Fix a bug in spill weight computation. If the alias is a super-register, and ↵Evan Cheng
the super-register is in the register class we are trying to allocate. Then add the weight to all sub-registers of the super-register even if they are not aliases. e.g. allocating for GR32, bh is not used, updating bl spill weight. bl should get the same spill weight otherwise it will be choosen as a spill candidate since spilling bh doesn't make ebx available. This fix PR2866. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67574 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Add sanity check in Clang TableGen backend to check if 'Component' is a string.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67565 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Fix internal representation of fp80 to be theDale Johannesen
same as a normal i80 {low64, high16} rather than its own {high64, low16}. A depressing number of places know about this; I think I got them all. Bitcode readers and writers convert back to the old form to avoid breaking compatibility. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67562 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23README.txt: test commit w/blank line appendedJohn Mosby
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67560 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23When unfolding a load during scheduling, the new operator node hasDan Gohman
a data dependency on the load node, so it really needs a data-dependence edge to the load node, even if the load previously existed. And add a few comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67554 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Update test for pr3864.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67545 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Fix PR3391 and PR3864. Reg allocator infinite looping.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67544 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Don't set SUnit::hasPhysRegDefs to true unless the defs areDan Gohman
actually have uses, which reflects the way it's used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67540 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Fix canClobberPhysRegDefs to check all SDNodes grouped togetherDan Gohman
in an SUnit, instead of just the first one. This fix is needed by some upcoming scheduler changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67531 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Add a new bit to SUnit to record whether a node has implicit physregDan Gohman
defs, regardless of whether they are actually used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67528 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Now that errs() is properly non-buffered, there's no need toDan Gohman
explicitly flush it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67526 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Clarify a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67525 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23LoopVR is not CFGOnly.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67524 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Enhance LiveValues to work on PHI operands.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67523 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Make getOperandNumForIncomingValue and getOperandNumForIncomingBlockDan Gohman
static member functions, and add getIncomingValueNumForOperand and getIncomingBlockNumForOperand, which are the respective inverses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67522 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Correct some comments. Operand numbers start at 0.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67518 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Model inline asm constraint which ties an input to an output register as ↵Evan Cheng
machine operand TIED_TO constraint. This eliminated the need to pre-allocate registers for these. This also allows register allocator can eliminate the unneeded copies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67512 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Do not fold away subreg_to_reg if the source register has a sub-register ↵Evan Cheng
index. That means the source register is taking a sub-register of a larger register. e.g. On x86 %RAX<def> = ... %RAX<def> = SUBREG_TO_REG 0, %EAX:3<kill>, 3 The first def is defining RAX, not EAX so the top bits were not zero-extended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67511 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23fix a bug Alexei Svitkine pointed out.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67510 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23When we restore signal handlers, restore them back to what theyChris Lattner
were when we came around, not to their default handler. This should fix PR3848 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67509 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23factorize signal registration, part of PR3848.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67508 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Fix a grammaro in a comment that Bill noticed.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67507 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23tt'ify.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67505 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23VC++ 6.0 is not future work :)Chris Lattner
Do not recommend llvm::OStream anymore. Use raw_ostream or MemoryBuffer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67504 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Add comments explaining why there's only one register forDan Gohman
i8 return values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67502 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Missed this as part of r67451.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67500 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22Fix PR3860 by correcting a predicate.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67473 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22Add some explanations of how apint loads and storesDuncan Sands
work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67471 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22Really should pass -dylib to the linker...Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67469 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22A dylib should be built as a dylib and not a bundle.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67468 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22add method to access a template argument.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67458 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-21Factorize out a concept - no functionality change.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67454 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-21Re-commit r67334 and r67349 with fix.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67451 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-21add a fastpath to ConstantExpr::getBitCast to handle the case when an obviouslyChris Lattner
unneeded bitcast is requested. This is common for frontends who just unconditionally cast even if the target is often the right type already. THis prevents going into getFoldedCast which switches on the opcode and does a bunch of other stuff before doing the same opzn. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67435 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-21add some inline methods for infix operators on sparse vectors,Chris Lattner
tidy some df iteration stuff, patch by John Mosby! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67428 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-21Removed AFGR32 register classBruno Cardoso Lopes
Handle odd registers allocation in FGR32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67422 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-20Fix a few more indentation problems and an 80-column violation.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67416 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-20No functional changes. Fix indentation and whitespace only.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67412 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-20Fix instcombine to not introduce undefined shifts when merging twoChris Lattner
shifts together. This fixes PR3851. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67411 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-20Don't load values out of global constants with weakDuncan Sands
linkage: the value may be replaced with something different at link time. (Frontends that want to allow values to be loaded out of weak constants can give their constants weak_odr linkage). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67407 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-20Simplify this code; use a while instead of an if and a do-while.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67400 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-20For inline asm output operand that matches an input. Encode the input ↵Evan Cheng
operand index in the high bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67387 91177308-0d34-0410-b5e6-96231b3b80d8
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