llvm-gcc4 boostrap.  Whenever a node is deleted by the dag combiner, it
*must* be returned by the visit function, or the dag combiner will not
know that the node has been processed (and will, e.g., send it to the
target dag combine xforms).

llvm-svn: 27922

any of the fancy graphs or other output. Just produce the flat, makefile
style output on stdout.

llvm-svn: 27921

llvm-svn: 27920

llvm-svn: 27919

llvm-svn: 27918

llvm-svn: 27917

llvm-svn: 27916

1. If Perl is not available, don't run Perl dependent targets.
2. Check in FinalLibDeps.txt for build environments that can't build it
   because there's no Perl processor.
3. Ensure that FinalLibDeps.txt depends on LibDeps.txt so it is
   automatically regenerated.
4. Support objdir != srcdir building.

llvm-svn: 27915

llvm-svn: 27914

llvm-svn: 27913

llvm-svn: 27912

llvm-svn: 27911

llvm-svn: 27910

llvm-svn: 27909

llvm-svn: 27908

llvm-svn: 27907

llvm-svn: 27906

llvm-svn: 27905

llvm-svn: 27904

llvm-svn: 27903

llvm-svn: 27902

llvm-svn: 27901

llvm-svn: 27900

llvm-svn: 27899

llvm-svn: 27898

llvm-svn: 27897

llvm-svn: 27896

llvm-svn: 27895

llvm-svn: 27894

llvm-svn: 27893

llvm-svn: 27892

llvm-svn: 27891

llvm-svn: 27890

llvm-svn: 27889

llvm-svn: 27888

llvm-svn: 27887

llvm-svn: 27886

llvm-svn: 27885

llvm-svn: 27884

llvm-svn: 27883