[Subzero][MIPS32] Fix stack offset assignment of spilled variables on MIPS32

src/IceTargetLoweringMIPS32.h

Index: src/IceTargetLoweringMIPS32.h
diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index 5d49b0140741d9d9fac1f1d5d64f9a49f60c0e43..70fed4e8cbc11e74742b3ba7c14820f9d0615c3f 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -420,6 +420,16 @@ public:
 
   void lowerArguments() override;
 
+  /// Make a pass through the SortedSpilledVariables and actually assign stack
+  /// slots. SpillAreaPaddingBytes takes into account stack alignment padding.
+  /// The SpillArea starts after that amount of padding. This matches the scheme
+  /// in getVarStackSlotParams, where there may be a separate multi-block global
+  /// var spill area and a local var spill area.
+  void assignVarStackSlots(VarList &SortedSpilledVariables,
+                           size_t SpillAreaPaddingBytes,
+                           size_t SpillAreaSizeBytes,
+                           size_t GlobalsAndSubsequentPaddingSize);
+
   /// Operand legalization helpers.  To deal with address mode constraints,
   /// the helpers will create a new Operand and emit instructions that
   /// guarantee that the Operand kind is one of those indicated by the