Be pessimistic in computing the buffer size when aligning.

llvm-svn: 50008
diff --git a/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp b/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
index b5a0737..b73b0bd 100644
--- a/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
@@ -664,7 +664,8 @@
 /// the new value.
 static unsigned RoundUpToAlign(unsigned FinalSize, unsigned Alignment) {
   if (Alignment == 0) Alignment = 1;
-  return (FinalSize + Alignment - 1) & ~(Alignment - 1);
+  // Since we do not know where the buffer will be allocated, be pessimistic.
+  return FinalSize + Alignment;
 }
   
 unsigned