Enhance EmitInstrWithCustomInserter() so target can specify CFG changes that sdisel will use to properly complete phi nodes.
Not functionality change yet.

llvm-svn: 82273

Overriding doFinalization is pretty lame.

llvm-svn: 82268

llvm-svn: 82245

variables to specified absolute address. Make use of this feature for MSP430.
This unbreaks PR4776.

llvm-svn: 82227

llvm-svn: 82215

Fix a bug in sdisel switch lowering code. When it updates the phi nodes in switch successor blocks, it can introduce multiple phi operands of the same value from different blocks (and may not be on the predecessor list).

This can be seen on CodeGen/Generic/2006-09-06-SwitchLowering.ll. But it's not known to cause any real regression (but I have added an assertion for it now).

llvm-svn: 82214

64-bit systems.

llvm-svn: 82180

currently unused.

llvm-svn: 82157

llvm-svn: 82150

llvm-svn: 82127

Fix PR4910: Broken logic in coalescer means when a physical register liveness is being shortened, the sub-registers were not. The symptom is the register allocator could not find a free register for this particular test. 

llvm-svn: 82108

llvm-svn: 82080

llvm-svn: 82077

constants out of loops. These aren't covered by the regular LICM
pass, because in LLVM IR constants don't require separate
instructions. They're not always covered by the MachineLICM pass
either, because it doesn't know how to unfold folded constant-pool
loads. This is somewhat experimental at this point, and off by
default.

llvm-svn: 82076

failures.

llvm-svn: 82040

llvm-svn: 82038

stuff common across all macho targets.

llvm-svn: 82018

llvm-svn: 82012

we have MCInstPrinter.

llvm-svn: 82006

Eliminate the PersonalityPrefix/Suffix & NeedsIndirectEncoding
fields from MAI: they aren't part of the asm syntax, they are
related to the structure of the object file.

To replace their functionality, add a new 
TLOF::getSymbolForDwarfGlobalReference method which asks targets
to decide how to reference a global from EH in a pc-relative way.

The default implementation just returns the symbol.  The default
darwin implementation references the symbol through an indirect
$non_lazy_ptr stub.  The bizarro x86-64 darwin specialization
handles the weird "foo@GOTPCREL+4" hack.

DwarfException.cpp now uses this to emit the reference to the
symbol in the right way, and this also eliminates another 
horrible hack from DwarfException.cpp:

-    if (strcmp(MAI->getPersonalitySuffix(), "+4@GOTPCREL"))
-      O << "-" << MAI->getPCSymbol();

llvm-svn: 81991

llvm-svn: 81970

one implementation into its one caller.  This eliminates a totally
awesome and gratuitous hack where we casted a Function* to 
GlobalVariable*.

llvm-svn: 81967

it into all of its call sites and simplifying them.

llvm-svn: 81962

llvm-svn: 81946

llvm-svn: 81942

move MachineFunctionInfo virtual method out of line to give it
a home.

llvm-svn: 81940

SVOffsets.

llvm-svn: 81937

llvm-svn: 81928

llvm-svn: 81909

Better solution for tracking both the original alignment of the access, and the current alignment based
on the source value offset.  This avoids increasing the size of mem nodes. 

llvm-svn: 81897

Another try at early partial coalescing. Identity phi source copies (their sources are defined by phi join def) are coalesced. And the phi join copy is backward copy propagated into the other copies.

Still miscompiling some tests. :-(

llvm-svn: 81849

llvm-svn: 81819

1. Switch from an std::set to a SmallPtrSet for visited chain nodes.
2. Do not force the recursive flattening of token factor nodes, regardless of
   use count.
3. Immediately process newly created TokenFactor nodes.

Also, improve combiner-aa by teaching it that loads to non-overlapping offsets
of relatively aligned objects cannot alias.

These changes result in a >5x speedup for combiner-aa on most testcases.

llvm-svn: 81816

it splits them.

llvm-svn: 81815

DAG Combiner to disambiguate chains for loads and stores of types which are
 broken up by the Legalizer into smaller pieces.  

llvm-svn: 81813

Add early coalescing to liveintervals. This is work in progress and is known to miscompute some tests. Read it at your own rish, I have aged 10 year while writing this.

The gist of this is if source of some of the copies that feed into a phi join is defined by the phi join, we'd like to eliminate them. However, if any of the non-identity source overlaps the live interval of the phi join then the coalescer won't be able to coalesce them. The early coalescer's job is to eliminate the identity copies by partially-coalescing the two live intervals.

llvm-svn: 81796

created once, so shouldn't be stuck in the middle of the loop. Also early exit
if there are no uses of UnwindInst in the function.

llvm-svn: 81785

llvm-svn: 81755

full AsmPrinter, and change TargetRegistry to keep track
of registered MCInstPrinters.

llvm-mc is still linking in the entire
target foo to get the code emitter stuff, but this is an
important step in the right direction.

llvm-svn: 81754

llvm-svn: 81727