Make custom lowering of ADD work correctly.  This
fixes PR2476; patch by Richard Osborne.  The same
problem exists for a bunch of other operators, but
I'm ignoring this because they will be automagically
fixed when the new LegalizeTypes infrastructure lands,
since it already solves this problem centrally.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52610 91177308-0d34-0410-b5e6-96231b3b80d8

Fix for PR2479: correctly optimize expressions like (a > 13) & (a ==
15).

See also PR1800, which is about the signed case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52608 91177308-0d34-0410-b5e6-96231b3b80d8

Use Instruction::eraseFromParent().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52606 91177308-0d34-0410-b5e6-96231b3b80d8

Use Function's arg_size() and size() methods.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52605 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify some getNode calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52604 91177308-0d34-0410-b5e6-96231b3b80d8

canClobberPhysRegDefs shouldn't called without checking hasPhysRegDefs;
check this with an assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52603 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid creating a redundant zero APInt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52602 91177308-0d34-0410-b5e6-96231b3b80d8

Use clear() to zero an existing APInt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52601 91177308-0d34-0410-b5e6-96231b3b80d8

Use back() instead of [size()-1].

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52600 91177308-0d34-0410-b5e6-96231b3b80d8

This file is empty.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52596 91177308-0d34-0410-b5e6-96231b3b80d8

Turn off llvm-gcc warnings when running "make check".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52595 91177308-0d34-0410-b5e6-96231b3b80d8

Use MachineBasicBlock::transferSuccessors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52594 91177308-0d34-0410-b5e6-96231b3b80d8

Use static_cast instead of reinterpret_cast for casting void*.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52592 91177308-0d34-0410-b5e6-96231b3b80d8

Fix warning when assertions disabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52590 91177308-0d34-0410-b5e6-96231b3b80d8

fix warning when assertions disabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52589 91177308-0d34-0410-b5e6-96231b3b80d8

fix warning when assertion disabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52588 91177308-0d34-0410-b5e6-96231b3b80d8

fix some warnings when assertions are disabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52587 91177308-0d34-0410-b5e6-96231b3b80d8

Remove a redundant return.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52585 91177308-0d34-0410-b5e6-96231b3b80d8

Reorder some fields in SDNode. This avoids padding,
reducings its size from 80 to 72 on 64-bit hosts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52584 91177308-0d34-0410-b5e6-96231b3b80d8

Remove ScheduleDAG's SUnitMap altogether. Instead, use SDNode's NodeId
field, which is otherwise unused after instruction selection, as an index
into the SUnit array.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52583 91177308-0d34-0410-b5e6-96231b3b80d8

Add a priority queue class, which is a wrapper around std::priority_queue
and provides fairly efficient removal of arbitrary elements. Switch
ScheduleDAGRRList from std::set to this new priority queue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52582 91177308-0d34-0410-b5e6-96231b3b80d8

Support for load/store of expanded float types.  I
don't know if a truncating store is possible here,
but added support for it anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52577 91177308-0d34-0410-b5e6-96231b3b80d8

Change ScheduleDAG's SUnitMap from DenseMap<SDNode*, vector<SUnit*> >
to DenseMap<SDNode*, SUnit*>, and adjust the way cloned SUnit nodes are
handled so that only the original node needs to be in the map.
This speeds up llc on 447.dealII.llvm.bc by about 2%.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52576 91177308-0d34-0410-b5e6-96231b3b80d8

Enable PRE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52574 91177308-0d34-0410-b5e6-96231b3b80d8

Undo spill weight tweak. Need to investigate the performance regressions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52572 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify some template parameterization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52571 91177308-0d34-0410-b5e6-96231b3b80d8

Back out Matthijs' DAE patches. It's miscompiling gcc driver.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52570 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VS build system.  Patch provided by Cedric Venet:

  http://lists.cs.uiuc.edu/pipermail/llvmdev/2008-June/015446.html

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52564 91177308-0d34-0410-b5e6-96231b3b80d8

Enhanced heuristic to determine the *best* register to spill. Instead of picking the register with the lowest spill weight. Consider (up to) 2 additional registers with spill weights that are close to the lowest spill weight. The one with fewest defs and uses that conflicts with the current interval (weighted by loop depth) is the spill candidate.

This is not always a win, but there are much more wins than loses and wins tend to be more noticeable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52554 91177308-0d34-0410-b5e6-96231b3b80d8

integer types are not primitive, they are derived.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52551 91177308-0d34-0410-b5e6-96231b3b80d8

llvmc doesn't exist anymore, and llvmc2 doesn't have a special license file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52550 91177308-0d34-0410-b5e6-96231b3b80d8

Remove empty directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52549 91177308-0d34-0410-b5e6-96231b3b80d8

Share some code that is common between integer and
float expansion (and sometimes vector splitting too).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52548 91177308-0d34-0410-b5e6-96231b3b80d8

Add some methods for querying the nature of a
store, like the methods for loads (and neaten
those up a bit while there).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52547 91177308-0d34-0410-b5e6-96231b3b80d8

Rename the operation of turning a float type into an
integer of the same type.  Before it was "promotion",
but this is confusing because it is quite different
to promotion of integers.  Call it "softening" instead,
inspired by "soft float".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52546 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up some uses of std::distance, now that we have allnodes_size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52545 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up a use of std::distance.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52544 91177308-0d34-0410-b5e6-96231b3b80d8

Tidy up some commments and use the getAggregateOperand and
getInsertedValueOperand accessors. Thanks Matthijs!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52543 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the conditions under which SCCP should examine insertvalue
instructions. Thanks to Matthijs Kooijman for pointing this out!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52542 91177308-0d34-0410-b5e6-96231b3b80d8

Add an allnodes_size method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52541 91177308-0d34-0410-b5e6-96231b3b80d8

Add testcase that checks that DeadArgElim doesn't touch stuff it shouldn't touch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52540 91177308-0d34-0410-b5e6-96231b3b80d8

80 column and trailing whitespace fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52539 91177308-0d34-0410-b5e6-96231b3b80d8

Don't let DeadArgumentElimination attempt to update callers when the return
type wasn't changed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52538 91177308-0d34-0410-b5e6-96231b3b80d8

Don't let DeadArgElimination change the return type ({} into void and {T}
into T) when no return values are actually dead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52537 91177308-0d34-0410-b5e6-96231b3b80d8

Explicitely track if any arguments or return values were removed in
DeadArgumentElimination and assert that the function type does not change if
nothing was changed. This should catch subtle changes in function type that are
not intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52536 91177308-0d34-0410-b5e6-96231b3b80d8

Remove debug output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52535 91177308-0d34-0410-b5e6-96231b3b80d8

Recommit r52459, rewriting of the dead argument elimination pass.

This is a fixed version that no longer uses multimap::equal_range, which
resulted in a pointer invalidation problem.

Also, DAE::InspectedFunctions was not really necessary, so it got removed.

Lastly, this version no longer applies the extra arg hack on functions who did
not have any arguments to start with.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52532 91177308-0d34-0410-b5e6-96231b3b80d8

Really disable PRE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52531 91177308-0d34-0410-b5e6-96231b3b80d8

"Just a small update for the project files for adding a missing preprocessor
definition for VS2005 (without SP1). It suppress the (bogus) M$ deprecated
warning."

Patch by Cédric Venet!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52530 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a warning, closing PR2452

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52529 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52528 91177308-0d34-0410-b5e6-96231b3b80d8

Fix an error handling redefinition of linkonce functions where the
types differ.  Patch by Nathan Keynes!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52527 91177308-0d34-0410-b5e6-96231b3b80d8

fix a warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52526 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR2471, which is a bug involving an invalid promotion from a conditional load.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52525 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typo, fix suggested by Nicholas Olsen

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52524 91177308-0d34-0410-b5e6-96231b3b80d8

Add C binding for ExecutionEngine::addGlobalMapping.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52523 91177308-0d34-0410-b5e6-96231b3b80d8

Teach ReturnInst lowering about aggregate return values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52522 91177308-0d34-0410-b5e6-96231b3b80d8

Change around the data structures used to store availability sets, resulting in a GVN+PRE that is faster that GVN alone was before.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52521 91177308-0d34-0410-b5e6-96231b3b80d8

Teach SCCP about insertvalue and extractvalue, and about
propagating constants across aggregate return values when
insertvalue and extractvalue are used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52520 91177308-0d34-0410-b5e6-96231b3b80d8

Teach InlineFunction how to differentiate between multiple-value
return statements and aggregate returns so that it handles both
correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52519 91177308-0d34-0410-b5e6-96231b3b80d8

Disable PRE for now. It seems to be breaking llvm-gcc bootstrapping.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52518 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the index calculations for the extractvalue lowering code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52517 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the ComputeLinearIndex logic and fix a few bugs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52516 91177308-0d34-0410-b5e6-96231b3b80d8

It's invalid to take the one-past-the-end address of a non-array
object.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52515 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify this code. Thanks Chris!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52514 91177308-0d34-0410-b5e6-96231b3b80d8

ISD::UNDEF should be expanded recursively / iteratively.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52508 91177308-0d34-0410-b5e6-96231b3b80d8

Add a hidden -disable-pre flag for testing purposes.  This should be removed
once benchmarking is completed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52506 91177308-0d34-0410-b5e6-96231b3b80d8

PRE requires that critical edges be split.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52505 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead code causing a warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52502 91177308-0d34-0410-b5e6-96231b3b80d8

Use the common API for adding instructions to basic blocks instead of
using BasicBlock::getInstList.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52500 91177308-0d34-0410-b5e6-96231b3b80d8

Be sure to remove values from the value numbering table after we delete them.
This fixes a failure on povray.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52499 91177308-0d34-0410-b5e6-96231b3b80d8

Use Instruction::moveBefore instead of manipulating the instruction list
directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52498 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid using BasicBlock::getInstList directly in a few places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52497 91177308-0d34-0410-b5e6-96231b3b80d8

Revert support for insertvalue and extractvalue instructions for the moment.
GVN expects that all inputs which to an instruction fall somewhere in the value
hierarchy, which isn't true for these.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52496 91177308-0d34-0410-b5e6-96231b3b80d8

Use the transferSuccessors helper function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52495 91177308-0d34-0410-b5e6-96231b3b80d8

Delete dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52494 91177308-0d34-0410-b5e6-96231b3b80d8

Add an idx_iterator to the insertvalue and extractvalue instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52493 91177308-0d34-0410-b5e6-96231b3b80d8

The inline keyword goes before the return type. This fixes a compiler warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52492 91177308-0d34-0410-b5e6-96231b3b80d8

Modify some ipconstprop tests to also test with invokes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52491 91177308-0d34-0410-b5e6-96231b3b80d8

Use a CallSite to find the nth argument of a call/invoke instruction instead of
using getOperand() directly. This makes things work with invoke instructions as
well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52489 91177308-0d34-0410-b5e6-96231b3b80d8

Fix some warnings reported by gcc-4.3.  Hopefully
this still compiles on windows - I can't test!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52488 91177308-0d34-0410-b5e6-96231b3b80d8

Missed a check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52487 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug with <8 x i16> shuffle lowering on X86 where parts of the
shuffle could be skipped.  The check is invalid because the loop index i
doesn't correspond to the element actually inserted. The correct check is
already done a few lines earlier, for whether the element is already in
the right spot, so this shouldn't have any effect on the codegen for
code that was already correct.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52486 91177308-0d34-0410-b5e6-96231b3b80d8

Revert my last patch, which was causing regression test failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52485 91177308-0d34-0410-b5e6-96231b3b80d8

New test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52483 91177308-0d34-0410-b5e6-96231b3b80d8

This also got better (55 - 51 instructions). But doing one more re-materialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52482 91177308-0d34-0410-b5e6-96231b3b80d8

This got better.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52481 91177308-0d34-0410-b5e6-96231b3b80d8

Coalesce copy from one register class to a sub register class. e.g. X86::MOV16to16_.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52480 91177308-0d34-0410-b5e6-96231b3b80d8

Cosmetic changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52479 91177308-0d34-0410-b5e6-96231b3b80d8

Unneeded include's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52478 91177308-0d34-0410-b5e6-96231b3b80d8

Minor spiller tweak to unfavor reload into load/store instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52477 91177308-0d34-0410-b5e6-96231b3b80d8

Insert empty slots into the instruction numbering in live intervals, so that we can more easily
add new instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52475 91177308-0d34-0410-b5e6-96231b3b80d8

Remove this test until the corresponding patch is reapplied because it's causing make check to crash for some people.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52473 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for extractvalue and insertvalue instructions in GVN.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52472 91177308-0d34-0410-b5e6-96231b3b80d8

Add local PRE to GVN.  This only operates in cases where it would not increase code size, namely when the instantiated expression
would only need to be created in one predecessor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52471 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor the way to get a string containing the features of the target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52470 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the source line debug information for the Windows platform.

According to DWARF-2 specification, the line information is provided through an offset in the .debug_line section.
Replace the label reference that is used with a section offset.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52468 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a missing comma spotted by Bram Geron.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52467 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the regressions on sext-misc.ll my patch yesterday caused.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52466 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r52459, which was causing an infinite loop or massive slowdown on MultiSource/Applications/SPASS, and possibly others as well.
Please reapply once this is fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52465 91177308-0d34-0410-b5e6-96231b3b80d8