Turn error recovery into an assert.

This was put in because in a certain version of DragonFlyBSD stat(2) lied about the
size of some files. This was fixed a long time ago so we can remove the workaround.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145059 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp
index cc3f6a8a48737800501ca1908d018408068bcf86..580338117b86424158909633c18de954f0ecbb30 100644 (file)
--- a/lib/Support/MemoryBuffer.cpp
+++ b/lib/Support/MemoryBuffer.cpp
@@ -330,13 +330,8 @@ error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
         continue;
       // Error while reading.
       return error_code(errno, posix_category());
-    } else if (NumRead == 0) {
-      // We hit EOF early, truncate and terminate buffer.
-      Buf->BufferEnd = BufPtr;
-      *BufPtr = 0;
-      result.swap(SB);
-      return success;
     }
+    assert(NumRead != 0 && "fstat reported an invalid file size.");
     BytesLeft -= NumRead;
     BufPtr += NumRead;
   }