_GLIBCXX_DEBUG.

llvm-svn: 37793

llvm-svn: 37792

llvm-svn: 37791

llvm-svn: 37790

llvm-svn: 37789

llvm-svn: 37788

llvm-svn: 37787

llvm-svn: 37786

vectors are split down to single elements as part of legalization.

llvm-svn: 37785

llvm-svn: 37784

Add support for performing GVNPRE on select instructions.  This fixes test/Transforms/GVNPRE/select.ll.

llvm-svn: 37783

llvm-svn: 37782

illegal value type will be transformed to, for code that needs the
register type after all transformations instead of just after the first
transformation.

Factor out the code that uses this information to do copy-from-regs and
copy-to-regs for various purposes into separate functions so that they
are done consistently.

llvm-svn: 37781

llvm-svn: 37780

be called with just an initial length value, just like in std::vector.

llvm-svn: 37779

llvm-svn: 37778

--enable-expensive-checks allows the developer to enable runtime
checking that can greatly increase compile time.  Currently it only
turns on _GLIBCXX_DEBUG.  Other expensive debugging checks added later
should be controlled by this configure option.

This patch also updates llvm-config with a --cppflags option to inform
llvm-gcc how to build itself so that it is compatible with an llvm that
was built with _GLIBCXX_DEBUG.

llvm-svn: 37777

llvm-svn: 37776

llvm-svn: 37774

llvm-svn: 37773

loop.
- Avoid loop unswich for loop header branch.
- While cloning dominators fix typo and handle self dominating blocks.

llvm-svn: 37772

llvm-svn: 37771

to loop unswitch candidate for the loop.

llvm-svn: 37770

Anton's testcase from 35.5s to 34.7s.

llvm-svn: 37769

llvm-svn: 37768

llvm-svn: 37767

llvm-svn: 37766

llvm-svn: 37765

llvm-svn: 37764

Partial fix for PR1502: If a EH register is needed in a successor of landing pad, add it as livein to all the blocks in the paths between the landing pad and the specified block.

llvm-svn: 37763

Use cached information that has already been computed to make clean() simpler and faster.  This is a small speedup on most cases.

llvm-svn: 37761

llvm-svn: 37760

This saves many lines of code duplication.  No functionality change.

llvm-svn: 37759

llvm-svn: 37758

llvm-svn: 37757

llvm-svn: 37756

to compute the number and type of registers needed for vector values
instead of computing it manually. This fixes PR1529.

llvm-svn: 37755

llvm-svn: 37753

with single-element vectors.

llvm-svn: 37752

llvm-svn: 37751