Add some classes to produce pretty-printed asm. We'll use these

shortly to provide nicely printed comments and other goodies in
asm files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75156 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/CodeGen/AsmStream.cpp b/lib/CodeGen/AsmStream.cpp
new file mode 100644
index 0000000000..8a9ded7ee5
--- /dev/null
+++ b/lib/CodeGen/AsmStream.cpp
@@ -0,0 +1,47 @@
+//===-- llvm/CodeGen/AsmStream.cpp - AsmStream Framework --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains instantiations of "standard" AsmOStreams.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/AsmStream.h"
+
+#include <unistd.h>
+
+namespace llvm {
+  AsmStreambuf asmoutbuf(STDOUT_FILENO);
+  AsmStreambuf asmerrbuf(STDERR_FILENO);
+
+  //===----------------------------------------------------------------------===//
+  //  raw_asm_ostream
+  //===----------------------------------------------------------------------===//
+
+  raw_asm_ostream::~raw_asm_ostream() {
+    flush();
+  }
+
+  /// flush_impl - The is the piece of the class that is implemented by
+  /// subclasses.  This outputs the currently buffered data and resets the
+  /// buffer to empty.
+  void raw_asm_ostream::flush_impl() {
+    if (OutBufCur-OutBufStart)
+      OS.write(OutBufStart, OutBufCur-OutBufStart);
+
+    HandleFlush();
+  }
+
+  namespace {
+    AsmOStream AsmOut(&asmoutbuf);
+    AsmOStream AsmErr(&asmerrbuf);
+  }
+
+  raw_asm_ostream asmout(AsmOut);
+  raw_asm_ostream asmerr(AsmErr);
+}