Switch the asmprinter (.ll) and all the stuff it requires over to

use raw_ostream instead of std::ostream.  Among other goodness,
this speeds up llvm-dis of kc++ with a release build from 0.85s
to 0.49s (88% faster).

Other interesting changes:
 1) This makes Value::print be non-virtual.
 2) AP[S]Int and ConstantRange can no longer print to ostream directly, 
    use raw_ostream instead.
 3) This fixes a bug in raw_os_ostream where it didn't flush itself 
    when destroyed.
 4) This adds a new SDNode::print method, instead of only allowing "dump".


A lot of APIs have both std::ostream and raw_ostream versions, it would
be useful to go through and systematically anihilate the std::ostream 
versions.

This passes dejagnu, but there may be minor fallout, plz let me know if
so and I'll fix it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55263 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/ConstantRange.cpp

@@ -22,8 +22,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/ConstantRange.h"
-#include "llvm/Support/Streams.h"
-#include <ostream>
+#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 /// Initialize a full (the default) or empty set for the specified type.
@@ -462,12 +461,12 @@ ConstantRange ConstantRange::truncate(uint32_t DstTySize) const {
 
 /// print - Print out the bounds to a stream...
 ///
-void ConstantRange::print(std::ostream &OS) const {
+void ConstantRange::print(raw_ostream &OS) const {
   OS << "[" << Lower << "," << Upper << ")";
 }
 
 /// dump - Allow printing from a debugger easily...
 ///
 void ConstantRange::dump() const {
-  print(cerr);
+  print(errs());
 }