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/Transforms/Utils/LowerSwitch.cpp

@@ -22,6 +22,7 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 using namespace llvm;
 
@@ -144,9 +145,10 @@ BasicBlock* LowerSwitch::switchConvert(CaseItr Begin, CaseItr End,
   DOUT << "RHS: " << RHS << "\n";
 
   CaseRange& Pivot = *(Begin + Mid);
-  DEBUG(cerr << "Pivot ==> " 
-             << cast<ConstantInt>(Pivot.Low)->getValue() << " -"
-             << cast<ConstantInt>(Pivot.High)->getValue() << "\n");
+  DEBUG(errs() << "Pivot ==> " 
+               << cast<ConstantInt>(Pivot.Low)->getValue() << " -"
+               << cast<ConstantInt>(Pivot.High)->getValue() << "\n";
+        errs().flush());
 
   BasicBlock* LBranch = switchConvert(LHS.begin(), LHS.end(), Val,
                                       OrigBlock, Default);