The system ranlib on darwin occasionally adds two extra newlines to the

end of files, breaking the CFE build.  As a gross hack around this,
ignore any trailing garbage on bytecode files.  Thanks to Brian for digging
in and identifying the problem.

llvm-svn: 16525

1 files changed, 8 insertions, 2 deletions

diff --git a/llvm/lib/Bytecode/Reader/Reader.cpp b/llvm/lib/Bytecode/Reader/Reader.cpp
index 18780208e2b..d44003c73a1 100644
--- a/llvm/lib/Bytecode/Reader/Reader.cpp
+++ b/llvm/lib/Bytecode/Reader/Reader.cpp
@@ -2139,10 +2139,16 @@ void BytecodeReader::ParseBytecode(BufPtr Buf, unsigned Length,
       error("Expected Module Block! Type:" + utostr(Type) + ", Size:" 
             + utostr(Size));
     }
-    if (At + Size != MemEnd) {
+
+    // It looks like the darwin ranlib program is broken, and adds trailing
+    // garbage to the end of some bytecode files.  This hack allows the bc
+    // reader to ignore trailing garbage on bytecode files.
+    if (At + Size < MemEnd)
+      MemEnd = BlockEnd = At+Size;
+
+    if (At + Size != MemEnd)
       error("Invalid Top Level Block Length! Type:" + utostr(Type)
             + ", Size:" + utostr(Size));
-    }
 
     // Parse the module contents
     this->ParseModule();