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

llvm-svn: 82273

llvm-svn: 82245

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

llvm-svn: 82080

llvm-svn: 82077

SVOffsets.

llvm-svn: 81937

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

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

llvm-svn: 81727

llvm-svn: 81493

isn't legal.

llvm-svn: 81492

post-decrement load/store.

llvm-svn: 81464

llvm-svn: 81415

llvm-svn: 81343

to instructions instead of zero extended ones.  This makes the asmprinter
print signed values more consistently.  This apparently only really affects
the X86 backend.

llvm-svn: 81265

null in the case of an empty struct, so don't try to call getNumValues
on it.

llvm-svn: 81180

from floating-point to integer first, and bitcast the result
back to floating-point. Previously, this test was passing by
falling back to SelectionDAG lowering. The resulting code isn't
as nice, but it's correct and CodeGen now stays on the fast path.

llvm-svn: 81171

llvm-svn: 81124

about by icc (#593, partial).  Patch by Erick Tryzelaar.

llvm-svn: 81115

icc (#177, partial).  Patch by Erick Tryzelaar.

llvm-svn: 81106

Do not use DenseMap operator[] because it inserts new entry if lookup fails. Use find() to check an entry in a DenseMap first.

llvm-svn: 81058

FastISel to recognize this pattern and emit a floating-point
negation using xor.

llvm-svn: 80963

swapping the operands if necessary.

llvm-svn: 80940

llvm-svn: 80773

Remove Offset from ExternalSybmol MachineOperands, this is unused (and at least partly unsupported, in X86 encoding at least).

llvm-svn: 80726

Use MDNodes to encode debug info in llvm IR.

llvm-svn: 80406

llvm-svn: 80116

llvm-svn: 80073

the array on its first access.

llvm-svn: 80040

Update DebugInfo interface to use metadata, instead of special named llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well.

This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!)

llvm-svn: 79977

 - The world needs better C++ refactoring tools, can I get an Amen!?

llvm-svn: 79843

llvm-svn: 79834

llvm-svn: 79832

update all code that this affects.

llvm-svn: 79830

effect with the way the current code is structured.

llvm-svn: 79792