[llvm-commits] CVS: llvm/lib/Bytecode/Reader/Reader.cpp

[Chris Lattner]

Changes in directory llvm/lib/Bytecode/Reader:

Reader.cpp updated: 1.51 -> 1.52

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Log message:

Add support for reading unaligned bytecode buffers


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Diffs of the changes:

Index: llvm/lib/Bytecode/Reader/Reader.cpp
diff -u llvm/lib/Bytecode/Reader/Reader.cpp:1.51 llvm/lib/Bytecode/Reader/Reader.cpp:1.52
--- llvm/lib/Bytecode/Reader/Reader.cpp:1.51	Thu Apr 17 23:11:56 2003
+++ llvm/lib/Bytecode/Reader/Reader.cpp	Sat Apr 19 16:45:17 2003
@@ -639,8 +639,19 @@
 Module *ParseBytecodeBuffer(const unsigned char *Buffer, unsigned Length,
                             std::string *ErrorStr) {
   BytecodeParser Parser;
+  unsigned char *PtrToDelete = 0;
+  if ((intptr_t)Buffer & 3) {         // If the buffer is not 4 byte aligned...
+    // Allocate a new buffer to hold the bytecode...
+    PtrToDelete = new unsigned char[Length+4];
+    unsigned Offset = 4-((intptr_t)PtrToDelete & 3);  // Make sure it's aligned
+    memcpy(PtrToDelete+Offset, Buffer, Length);       // Copy it over
+    Buffer = PtrToDelete+Offset;
+  }
+
   Module *R = Parser.ParseBytecode(Buffer, Buffer+Length);
   if (ErrorStr) *ErrorStr = Parser.getError();
+
+  delete [] PtrToDelete;   // Delete alignment buffer if neccesary
   return R;
 }