CopyToReg/CopyFromReg/INLINEASM.  These are annoying because
they have the same opcode before an after isel.  Fix this by
setting their NodeID to -1 to indicate that they are selected,
just like what automatically happens when selecting things that
end up being machine nodes.

With that done, give IsLegalToFold a new flag that causes it to
ignore chains.  This lets the HandleMergeInputChains routine be
the one place that validates chains after a match is successful,
enabling the new hotness in chain processing.  This smarter
chain processing eliminates the need for "PreprocessRMW" in the
X86 and MSP430 backends and enables MSP to start matching it's
multiple mem operand instructions more aggressively.

I currently #if out the dead code in the X86 backend and MSP 
backend, I'll remove it for real in a follow-on patch.

The testcase changes are:
  test/CodeGen/X86/sse3.ll: we generate better code
  test/CodeGen/X86/store_op_load_fold2.ll: PreprocessRMW was 
      miscompiling this before, we now generate correct code
      Convert it to filecheck while I'm at it.
  test/CodeGen/MSP430/Inst16mm.ll: Add a testcase for mem/mem
      folding to make anton happy. :)

llvm-svn: 97596

llvm-svn: 97595

llvm-svn: 97594

Place the LSDA into the TEXT section on Mach-O. This saves space.

llvm-svn: 97592

After discussion with Zhongxing, don't force the initializer of DeclStmts to be
block-level expressions.

This led to some interesting fallout:

[UninitializedValues]

Always visit the initializer of DeclStmts (do not assume they are block-level expressions).

[BasicStore]

With initializers of DeclStmts no longer block-level expressions, this causes self-referencing initializers (e.g. 'int x = x') to no longer cause the initialized variable to be live before the DeclStmt.  While this is correct, it caused BasicStore::RemoveDeadBindings() to prune off the values of these variables from the initial store (where they are set to uninitialized).  The fix is to back-port some (and only some) of the lazy-binding logic from RegionStore to
BasicStore.  Now the default values of local variables are determined lazily as opposed
to explicitly initialized.

llvm-svn: 97591

llvm-svn: 97590

we need to synthesize has been marked as used by Sema.

Change Sema to avoid these asserts.

llvm-svn: 97589

xor pattern.  I have no plans to fix this XFAIL.

llvm-svn: 97587

llvm-svn: 97586

llvm-svn: 97585

llvm-svn: 97584

the opc string passed in, since it's a given from the class inheritance of T2sI.
The fixed the extra 's' in adcss & sbcss when disassembly printing.

llvm-svn: 97582

llvm-svn: 97581

by loop depth and emit loop-invariant subexpressions outside of loops.
This speeds up MultiSource/Applications/viterbi and others.

llvm-svn: 97580

GCC. Fixes PR6301.

llvm-svn: 97579

llvm-svn: 97578

llvm-svn: 97577

llvm-svn: 97576

llvm-svn: 97575

to itself, even though this isn't wildly useful.

llvm-svn: 97574

SMMULR, SMMLAR, SMMLSR, TBB, TBH, and 16-bit Thumb instruction CPS for
disassembly only.

llvm-svn: 97573

Thanks Duncan!

llvm-svn: 97572

Add printMandatoryPredicateOperand() PrintMethod for IT predicate printing.

Ref: A8.3 Conditional execution
llvm-svn: 97571

careful about value-dependent enumerators. Fixes PR5786.

llvm-svn: 97570

llvm-svn: 97569

used to do this, but it got lost when we switched functional-style
cast syntax over to using the new initialization code. Fixes PR6457.

llvm-svn: 97568

llvm-svn: 97567

use scan-build with Wine, for example.

Ted, I hope this is OK.

llvm-svn: 97566

llvm-svn: 97565

llvm-svn: 97564

and nothing for AddressSpace, pass 0 for InsertBefore, "false" for ThreadLocal
and AddressSpace for AddressSpace.  Spotted by gcc-4.5.

llvm-svn: 97563

We may query their liveness because they are added to store when passing
argument values.

llvm-svn: 97562

was that we weren't properly handling the case when interior
nodes of a matched pattern become dead after updating chain
and flag uses.  Now we handle this explicitly in 
UpdateChainsAndFlags.

llvm-svn: 97561

base/member initializers.

llvm-svn: 97560

*does* delete ex-operands that become dead.

llvm-svn: 97559

llvm-svn: 97558

llvm-svn: 97557

llvm-svn: 97556

DoInstructionSelection.  Inline "SelectRoot" into it from DAGISelHeader.
Sink some other stuff out of DAGISelHeader into SDISel.

Eliminate the various 'Indent' stuff from various targets, which dates
to when isel was recursive.

 17 files changed, 114 insertions(+), 430 deletions(-)

llvm-svn: 97555

Fixes PR5309.

llvm-svn: 97554