Driver: Handle "linker input" arguments.

 - Make InputInfo a variant of filename, pipe, input argument,
   nothing.

 - Leave a FIXME in InputInfo that this should be revisited.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67292 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 40 insertions, 14 deletions

diff --git a/lib/Driver/InputInfo.h b/lib/Driver/InputInfo.h
index 617e70365d..c657bef95a 100644
--- a/lib/Driver/InputInfo.h
+++ b/lib/Driver/InputInfo.h
@@ -21,37 +21,61 @@ namespace driver {
 
 /// InputInfo - Wrapper for information about an input source.
 class InputInfo {
+  // FIXME: The distinction between filenames and inputarg here is
+  // gross; we should probably drop the idea of a "linker
+  // input". Doing so means tweaking pipelining to still create link
+  // steps when it sees linker inputs (but not treat them as
+  // arguments), and making sure that arguments get rendered
+  // correctly.
+  enum Class {
+    Nothing,
+    Filename,
+    InputArg,
+    Pipe
+  };
+
   union {
     const char *Filename;
+    const Arg *InputArg;
     PipedJob *Pipe;
   } Data;
-  bool IsPipe;
+  Class Kind;
   types::ID Type;
   const char *BaseInput;
 
 public:
   InputInfo() {}
   InputInfo(types::ID _Type, const char *_BaseInput)
-    : IsPipe(false), Type(_Type), BaseInput(_BaseInput) {
-    Data.Filename = 0;
+    : Kind(Nothing), Type(_Type), BaseInput(_BaseInput) {
+  }
+  InputInfo(const char *_Filename, types::ID _Type, const char *_BaseInput)
+    : Kind(Filename), Type(_Type), BaseInput(_BaseInput) {
+    Data.Filename = _Filename;
   }
-  InputInfo(const char *Filename, types::ID _Type, const char *_BaseInput)
-    : IsPipe(false), Type(_Type), BaseInput(_BaseInput) {
-    Data.Filename = Filename;
+  InputInfo(const Arg *_InputArg, types::ID _Type, const char *_BaseInput)
+    : Kind(InputArg), Type(_Type), BaseInput(_BaseInput) {
+    Data.InputArg = _InputArg;
   }
-  InputInfo(PipedJob *Pipe, types::ID _Type, const char *_BaseInput)
-    : IsPipe(true), Type(_Type), BaseInput(_BaseInput) {
-    Data.Pipe = Pipe;
+  InputInfo(PipedJob *_Pipe, types::ID _Type, const char *_BaseInput)
+    : Kind(Pipe), Type(_Type), BaseInput(_BaseInput) {
+    Data.Pipe = _Pipe;
   }
 
-  bool isPipe() const { return IsPipe; }
+  bool isNothing() const { return Kind == Nothing; }
+  bool isFilename() const { return Kind == Filename; }
+  bool isInputArg() const { return Kind == InputArg; }
+  bool isPipe() const { return Kind == Pipe; }
   types::ID getType() const { return Type; }
   const char *getBaseInput() const { return BaseInput; }
 
-  const char *getInputFilename() const {
-    assert(!isPipe() && "Invalid accessor.");
+  const char *getFilename() const {
+    assert(isFilename() && "Invalid accessor.");
     return Data.Filename;
   }
+  const Arg &getInputArg() const {
+    assert(isInputArg() && "Invalid accessor.");
+    return *Data.InputArg;
+  }
   PipedJob &getPipe() const {
     assert(isPipe() && "Invalid accessor.");
     return *Data.Pipe;
@@ -62,8 +86,10 @@ public:
   std::string getAsString() const {
     if (isPipe())
       return "(pipe)";
-    else if (const char *N = getInputFilename())
-      return std::string("\"") + N + '"';
+    else if (isFilename())
+      return std::string("\"") + getFilename() + '"';
+    else if (isInputArg())
+      return "(input arg)";
     else
       return "(nothing)";
   }