Added Mips support for DYNAMIC_STACKALLOC
Fixed bug in adjustMipsStackFrame, which was breaking
while trying to access a dead stack object index. Also added
one more alignment before fixing the callee saved registers
stack offset adjustment.

llvm-svn: 54485
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h
index 25b1161..3c8afb8 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.h
+++ b/llvm/lib/Target/Mips/MipsISelLowering.h
@@ -93,6 +93,7 @@
     SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG);
     SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
     SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG);
+    SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG);
     SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
     SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG);