Move new lld's code to Common subdirectory.

New lld's files are spread under lib subdirectory, and it isn't easy
to find which files are actually maintained. This patch moves maintained
files to Common subdirectory.

Differential Revision: https://reviews.llvm.org/D37645

llvm-svn: 314719

1 files changed, 66 insertions, 0 deletions

diff --git a/lld/Common/Reproduce.cpp b/lld/Common/Reproduce.cpp
new file mode 100644
index 00000000000..1e3dabaea0c
--- /dev/null
+++ b/lld/Common/Reproduce.cpp
@@ -0,0 +1,66 @@
+//===- Reproduce.cpp - Utilities for creating reproducers -----------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lld/Common/Reproduce.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+
+using namespace lld;
+using namespace llvm;
+using namespace llvm::sys;
+
+// Makes a given pathname an absolute path first, and then remove
+// beginning /. For example, "../foo.o" is converted to "home/john/foo.o",
+// assuming that the current directory is "/home/john/bar".
+// Returned string is a forward slash separated path even on Windows to avoid
+// a mess with backslash-as-escape and backslash-as-path-separator.
+std::string lld::relativeToRoot(StringRef Path) {
+  SmallString<128> Abs = Path;
+  if (fs::make_absolute(Abs))
+    return Path;
+  path::remove_dots(Abs, /*remove_dot_dot=*/true);
+
+  // This is Windows specific. root_name() returns a drive letter
+  // (e.g. "c:") or a UNC name (//net). We want to keep it as part
+  // of the result.
+  SmallString<128> Res;
+  StringRef Root = path::root_name(Abs);
+  if (Root.endswith(":"))
+    Res = Root.drop_back();
+  else if (Root.startswith("//"))
+    Res = Root.substr(2);
+
+  path::append(Res, path::relative_path(Abs));
+  return path::convert_to_slash(Res);
+}
+
+// Quote a given string if it contains a space character.
+std::string lld::quote(StringRef S) {
+  if (S.contains(' '))
+    return ("\"" + S + "\"").str();
+  return S;
+}
+
+std::string lld::rewritePath(StringRef S) {
+  if (fs::exists(S))
+    return relativeToRoot(S);
+  return S;
+}
+
+std::string lld::toString(opt::Arg *Arg) {
+  std::string K = Arg->getSpelling();
+  if (Arg->getNumValues() == 0)
+    return K;
+  std::string V = quote(Arg->getValue());
+  if (Arg->getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
+    return K + V;
+  return K + " " + V;
+}