Bug fix - incorrect frame size calculation

dibyendumajumdar · dibyendumajumdar · commit 6381f9b86daa · 2025-03-30T10:39:36.000+01:00
diff --git a/optvm/src/main/java/com/compilerprogramming/ezlang/compiler/ChaitinGraphColoringRegisterAllocator.java b/optvm/src/main/java/com/compilerprogramming/ezlang/compiler/ChaitinGraphColoringRegisterAllocator.java
@@ -45,7 +45,7 @@ public Map<Integer, Integer> assignRegisters(CompiledFunction function, int numR
      * Frame size = max number of registers needed to execute the function
      */
     private int computeFrameSize(Map<Integer, Integer> assignments) {
-        return assignments.values().stream().mapToInt(k->k).max().orElse(0);
+        return assignments.values().stream().mapToInt(k->k).max().orElse(-1)+1;
     }
 
     /**

Original file line number	Diff line number	Diff line change
`@@ -45,7 +45,7 @@ public Map<Integer, Integer> assignRegisters(CompiledFunction function, int numR`
`45`	`45`	`* Frame size = max number of registers needed to execute the function`
`46`	`46`	`*/`
`47`	`47`	`private int computeFrameSize(Map<Integer, Integer> assignments) {`
`48`		`- return assignments.values().stream().mapToInt(k->k).max().orElse(0);`
	`48`	`+ return assignments.values().stream().mapToInt(k->k).max().orElse(-1)+1;`
`49`	`49`	`}`
`50`	`50`
`51`	`51`	`/**`