MOV R0, R1
    MOV R1, R0

the second machine instruction is removed. Added a regression test.

llvm-svn: 29792

Adjust usage of the ExecuteAndWait function to use the last argument which
is the ErrMsg string. This is necessitated because this function no longer
throws exceptions on error.

llvm-svn: 29791

Remove all exception code from Program.inc and implement its new interface
with an ErrMsg string argument.

llvm-svn: 29790

Make sys::Program::ExecuteAndWait not throw exceptions and update any
affected code. It now return -9999 to signal that the program couldn't be
executed. Only one case (in bugpoint) actually examines the result code.

llvm-svn: 29785

llvm-svn: 29780

llvm-svn: 29771

llvm-svn: 29770

llvm-svn: 29769

1. Actually turn on -fno-exceptions in libraries that do not have the
   REQUIRES_EH option in their Makefile. The following library file size
   savings were made (DEBUG):
      libLLVMDataStructure.a  525K
      libLLVMCore.a           380K
      libLLVMCodeGen.a        350K
      libLLVMTransformUtils.a 305K
      libLLVMScalarOpts.a     270K
      libLLVMAnalysis.a       247K
      libLLVMSelectionDAG.a   233K
      libLLVMipo.a            175K
      LLVMX86.o               123K
      LLVMPPC.o                81K
      libLLVMipa.a             17K
                 TOTAL      2,706K
      Note that the savings is actually a little larger than this because
      I didn't count any of the libraries that had small changes.

2. Remove REQUIRES_EH from the AsmParser library as it is now exception
   free. This resulted in a nearly 78K drop in the size of the debug
   library for AsmParser.

llvm-svn: 29767

llvm-svn: 29765

Rid the Assembly Parser of exceptions. This is a really gross hack but it
will do until the Assembly Parser is re-written as a recursive descent.
The basic premise is that wherever the old "ThrowException" function was
called (new name: GenerateError) we set a flag (TriggerError). Every
production checks that flag and calls YYERROR if it is set. Additionally,
each call to ThrowException in the grammar is replaced with GEN_ERROR
which calls GenerateError and then YYERROR immediately. This prevents
the remaining production from continuing after an error condition.

llvm-svn: 29763

llvm-svn: 29756

llvm-svn: 29752

llvm-svn: 29751

llvm-svn: 29750

llvm-svn: 29748

llvm-svn: 29747

llvm-svn: 29746

This reduces selectiondag time on kc++ from 5.43s to 4.98s (9%).  More
significantly, this speeds up the default ppc scheduler from ~1571ms to 1063ms,
a 33% speedup.

llvm-svn: 29743

llvm-svn: 29741

llvm-svn: 29740

llvm-svn: 29730

Remove the hard coded store and load of the link register
Implement ARMFrameInfo

llvm-svn: 29727

llvm-svn: 29726

llvm-svn: 29725

llvm-svn: 29722

linking the program on the fly.

llvm-svn: 29721

llvm-svn: 29715

llvm-svn: 29711

the creation of canonical VTLists.

llvm-svn: 29709

llvm-svn: 29687

of value-type nodes.  This avoids having to do mallocs for std::vectors of
valuetypes when a node returns more than one type.

llvm-svn: 29685

llvm-svn: 29677

kimwitu, but seems like a good idea from a "avoid performance cliffs" standpoint :)

llvm-svn: 29675

Transforms/CondProp/2006-08-14-SingleEntryPhiCrash.ll

llvm-svn: 29673

Rafael Espindola for pointing this out.

llvm-svn: 29669

ldr rx, [ry, #offset]

llvm-svn: 29664

the number of relocations in object files, shrinkifying them.

llvm-svn: 29650

llvm-svn: 29649

llvm-svn: 29648