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

examples/HowToUseJIT/HowToUseJIT.cpp

@@ -42,7 +42,7 @@
 #include "llvm/ExecutionEngine/JIT.h"
 #include "llvm/ExecutionEngine/Interpreter.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
-#include <iostream>
+#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 int main() {
@@ -99,14 +99,15 @@ int main() {
   ExistingModuleProvider* MP = new ExistingModuleProvider(M);
   ExecutionEngine* EE = ExecutionEngine::create(MP, false);
 
-  std::cout << "We just constructed this LLVM module:\n\n" << *M;
-  std::cout << "\n\nRunning foo: " << std::flush;
+  outs() << "We just constructed this LLVM module:\n\n" << *M;
+  outs() << "\n\nRunning foo: ";
+  outs().flush();
 
   // Call the `foo' function with no arguments:
   std::vector<GenericValue> noargs;
   GenericValue gv = EE->runFunction(FooF, noargs);
 
   // Import result of execution:
-  std::cout << "Result: " << gv.IntVal << "\n";
+  outs() << "Result: " << gv.IntVal << "\n";
   return 0;
 }