constants as being "true" when evaluating branches.  This was introduced
because we now create constantexprs for the constants instead of failing the
fold.

llvm-svn: 10778

llvm-svn: 10777

binary and YACC as bison -y.

llvm-svn: 10776

YACC as bison -y.  In this way, we ensure that bison is being used, but
the Makefiles have macros for using bison itself and for getting bison to
act like it is traditional yacc.

llvm-svn: 10774

register so that LiveVariable analysis is not confused.

llvm-svn: 10773

llvm-svn: 10770

llvm-svn: 10769

llvm-svn: 10768

* Implement SCCP of load instructions, implementing Transforms/SCCP/loadtest.ll
  This allows us to fold expressions like "foo"[2], even if the pointer is only
  a conditional constant.

llvm-svn: 10767

llvm-svn: 10766

from constant memory is, but lets not take chances.

llvm-svn: 10765

llvm-svn: 10763

as the result of the binary operator is always constant.  This does not require
the PHI itself to be constant though.

llvm-svn: 10762

case that the C/C++ front-end generates.

llvm-svn: 10761

llvm-svn: 10760

llvm-svn: 10759

ConstantExpr::getGetElementPtr method folds two getelementptr instructions
when possible.

llvm-svn: 10758

llvm-svn: 10757

llvm-svn: 10756

LiveVariables::HandlePhysRegDef private they use information that is
not in memory when LiveVariables finishes the analysis.

Also update the TwoAddressInstructionPass to not use this interface.

llvm-svn: 10755

The first change (which is disabled) compactifies all of the function constant
pools into the global constant pool, in an attempt to reduce the amount of
duplication and overhead.  Unfortunately, as the comment indicates, this is
not yet a win, so it is disabled.

The second change sorts the typeid's so that those types that can be used
by instructions in the program appear earlier in the table than those that
cannot (such as structures and arrays).  This causes the instructions to
be able to use the dense encoding more often, saving about 5K on 254.gap.
This is only a .65% savings though, unfortunately. :(

llvm-svn: 10754

llvm-svn: 10753

llvm-svn: 10752

Fix iterator invalidation problems which was causing -mstrip to miss some
entries, and read free'd memory.  This shrinks the symbol table of 254.gap
from 333 to 284 bytes!  :)

llvm-svn: 10751

occurs when the symbol table for a module has been stripped, making all of the
function local symbols go away.

This saves 6728 bytes in the stripped bytecode file of 254.gap (which obviously
has 841 functions), which isn't a ton, but helps and was easy.

llvm-svn: 10750

llvm-svn: 10749

llvm-svn: 10748

llvm-svn: 10747

llvm-svn: 10746

llvm-svn: 10745

llvm-svn: 10744

llvm-svn: 10743

llvm-svn: 10742

llvm-svn: 10741

llvm-svn: 10740

* Refactor reader stuff out of include/llvm/Bytecode/Primitives.h.  This is
  internal implementation details for the reader, not public interfaces!

llvm-svn: 10739

internal implementation details for the writer, not public interfaces!

llvm-svn: 10738

llvm-svn: 10737

llvm-svn: 10736

llvm-svn: 10735