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: 81848

When performing an user defined conversion sequence, perform the initial standard conversion sequence. This lets us remove a workaround in SemaCompleteConstructorCall.

llvm-svn: 81847

While I'm there, change code that does:
  SomeTy == Type::getFooType(Context)
into:
  SomeTy->getTypeID() == FooTyID
to decrease the amount of useless type creation which may involve locking, etc.

llvm-svn: 81846

an unpacked one.

llvm-svn: 81845

llvm-svn: 81844

argpromote to avoid invalidating an iterator.  This fixes PR4977.
All clang tests now pass with expensive checking (on my system 
at least).

llvm-svn: 81843

llvm-svn: 81842

llvm-svn: 81841

llvm-svn: 81840

llvm-svn: 81839

are in the SCC for each execution of a CGSCC pass.

llvm-svn: 81838

llvm-svn: 81837

llvm-svn: 81836

llvm-svn: 81835

llvm-svn: 81834

llvm-svn: 81833

__builtin_offsetof in the static analyzer that __builtin_offsetof is
not guaranteed to return an integer constant.  We will need to shore
this up later, but now at least we have correct support for when this
*is* an integer constant.

llvm-svn: 81830

llvm-svn: 81827

GetProcessId was introduced only in XP. As a bonus, this change makes Program
objects copyable, since Program is now basically a PID.

llvm-svn: 81826

llvm-svn: 81825

llvm-svn: 81824

llvm-svn: 81823

llvm-svn: 81822

has multiple uses, as one of the other uses may be on a path
to a different node above the callseq_start, because that
leads to a cyclic graph. This problem is exposed when
-combiner-global-alias-analysis is used. This fixes PR4880.

llvm-svn: 81821

llvm-svn: 81820

llvm-svn: 81819

versions of CALL and JMP with segmented addresses
provided in-line, as pairs of immediates.

llvm-svn: 81818

parses the .word directive as 4 bytes and ARMAsmParser::ParseInstruction will
give an error is called.  Broke out the test of the .word directive into two
different test cases, one for x86 and one for arm.

llvm-svn: 81817

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

its result if the condition is false.

llvm-svn: 81814

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

llvm-svn: 81813

a type convesion function results in ambiguity.

llvm-svn: 81812

llvm-svn: 81811

memset region to the alignment of the new start address.

llvm-svn: 81810

llvm-svn: 81809

llvm-svn: 81808

conversion function.

llvm-svn: 81807

templates.

llvm-svn: 81806