in the backend. Introduce a new SDNode type, MemOperandSDNode, for
holding a MemOperand in the SelectionDAG IR, and add a MemOperand
list to MachineInstr, and code to manage them. Remove the offset
field from SrcValueSDNode; uses of SrcValueSDNode that were using
it are all all using MemOperandSDNode now.

Also, begin updating some getLoad and getStore calls to use the
PseudoSourceValue objects.

Most of this was written by Florian Brander, some
reorganization and updating to TOT by me.

llvm-svn: 46585

Fixed a bug in MergeValueInAsValue() pointed out by David Greene. Replace val# with previous liverange's.

llvm-svn: 46579

Treat the label for the first @llvm.dbg.stoppoint the same way as the dbg_func_start label. Make sure nothing else is inserted before them.
Note this solution might be somewhat fragile since ISD::LABEL may be used for other
purposes. If that ends up to be an issue, we may need to introduce a different node
for debug labels.

llvm-svn: 46571

llvm-svn: 46569

A semi-gross fix for a debug info issue. When inserting the "function start" label (i.e. first label in the entry block) take care to insert it at the beginning of the block.

llvm-svn: 46568

legitimate way of representing global variable GV in debug info.

llvm-svn: 46565

Even though InsertAtEndOfBasicBlock is an ugly hack it still deserves a proper name. Rename it to EmitInstrWithCustomInserter since it does not necessarily insert
instruction at the end.

llvm-svn: 46562

memory reference information in the backend. Most of this was written by
Florian Brander, cleanup and updating to TOT by me.

llvm-svn: 46556

list just to see if whether the list is empty.

llvm-svn: 46555

llvm-svn: 46554

llvm-svn: 46553

llvm-svn: 46546

llvm-svn: 46545

- Expand tabs... (poss 80-col violations, will get them later...)
- Consolidate logic for SelectDFormAddr and SelectDForm2Addr into a single
  function, simplifying maintenance. Also reduced custom instruction
  generation for SPUvecinsert/INSERT_MASK.

llvm-svn: 46544

Make DSE much more aggressive by performing DCE earlier.  Update a testcase to reflect this increased aggressiveness.

llvm-svn: 46542

of one of its internal maps.

llvm-svn: 46541

In practice this can only happen on code with already undefined behavior, 
but this is still a good thing to handle correctly.

llvm-svn: 46539

and StoreSDNode into their common base class LSBaseSDNode. Member
functions getLoadedVT and getStoredVT are replaced with the common
getMemoryVT to simplify code that will handle both loads and stores.

llvm-svn: 46538

Work in progress. This patch *fixes* x86-64 calls which are modelled as StructRet but really should be return in registers, e.g. _Complex long double, some 128-bit aggregates. This is a short term solution that is necessary only because llvm, for now, cannot model i128 nor call's with multiple results.
Status: This only works for direct calls, and only the caller side is done. Disabled for now.

llvm-svn: 46527

type that matters but the operand type.  This fixes
2008-01-08-IllegalCMP.ll which crashed with the new
legalize infrastructure because SETCC with result
type i8 and operand type i64 was being custom expanded
by the X86 backend.  With this fix, the gcc build gets
as far as the first libcall.

llvm-svn: 46525

llvm-svn: 46523

llvm-svn: 46514

llvm-svn: 46513

llvm-svn: 46510

compiler warnings.

llvm-svn: 46509

llvm-svn: 46508

llvm-svn: 46506

avoid turning -0.0 + 0.0 -> -0.0 which is incorrect.

llvm-svn: 46499

to get the alignment of global variables, rather than
using hand-made versions.

llvm-svn: 46495

the handling of eliminating stores to byval arguments.

llvm-svn: 46494

llvm-svn: 46488

llvm-svn: 46486

llvm-svn: 46485

These loops are not yet handled.

Fix PR 1912.

llvm-svn: 46484

only two addressing mode nodes, SPUaform and SPUindirect (vice the
three previous ones, SPUaform, SPUdform and SPUxform). This improves
code somewhat because we now avoid using reg+reg addressing when
it can be avoided. It also simplifies the address selection logic,
which was the main point for doing this.

Also, for various global variables that would be loaded using SPU's
A-form addressing, prefer D-form offs[reg] addressing, keeping the
base in a register if the variable is used more than once.

llvm-svn: 46483

llvm-svn: 46458

llvm-svn: 46455

the function label isn't associated with something it shouldn't be.

llvm-svn: 46449

llvm-svn: 46433

llvm-svn: 46431