Fix the Linker testcase regressions, by making MemoryBuffer::getFileOrSTDIN return

a valid but empty buffer if stdin is empty.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44219 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 6 deletions

diff --git a/include/llvm/Support/MemoryBuffer.h b/include/llvm/Support/MemoryBuffer.h
index aa13bfc..cfef6b1 100644
--- a/include/llvm/Support/MemoryBuffer.h
+++ b/include/llvm/Support/MemoryBuffer.h
@@ -88,14 +88,11 @@ public:
   
   /// getFileOrSTDIN - Open the specified file as a MemoryBuffer, or open stdin
   /// if the Filename is "-".  If an error occurs, this returns null and fills
-  /// in *ErrStr with a reason.
+  /// in *ErrStr with a reason.  If stdin is empty, this API (unlike getSTDIN)
+  /// returns an empty buffer.
   static MemoryBuffer *getFileOrSTDIN(const char *FilenameStart,unsigned FnSize,
                                       std::string *ErrStr = 0,
-                                      int64_t FileSize = -1) {
-    if (FnSize == 1 && FilenameStart[0] == '-')
-      return getSTDIN();
-    return getFile(FilenameStart, FnSize, ErrStr, FileSize);
-  }
+                                      int64_t FileSize = -1);
   
   /// getFileOrSTDIN - Open the specified file as a MemoryBuffer, or open stdin
   /// if the Filename is "-".  If an error occurs, this returns null and fills