simplify even more

compiler/build_cf_graph.jou

@@ -114,7 +114,7 @@ def add_unary_op(
     target: LocalVariable*,
 ) -> None:
     ins = CfInstruction{location = location, kind = op, destvar = target}
-    ins.set_1_operand(arg)
+    ins.add_operand(arg)
     add_instruction(st, ins)
 
 
@@ -128,7 +128,8 @@ def add_binary_op(
     target: LocalVariable*,
 ) -> None:
     ins = CfInstruction{location = location, kind = op, destvar = target}
-    ins.set_2_operands(lhs, rhs)
+    ins.add_operand(lhs)
+    ins.add_operand(rhs)
     add_instruction(st, ins)
 
 
@@ -325,7 +326,7 @@ def build_class_field_pointer(
                 kind = CfInstructionKind::PtrClassField,
                 destvar = result,
             }
-            ins.set_1_operand(instance)
+            ins.add_operand(instance)
 
             assert sizeof(ins.fieldname) == sizeof(f->name)
             strcpy(ins.fieldname, f->name)

compiler/cf_graph.jou

@@ -202,18 +202,10 @@ class CfInstruction:
             free_signature(&self->signature)
         free(self->operands)
 
-    def set_1_operand(self, operand: LocalVariable*) -> None:
-        self->noperands = 1
-        self->operands = malloc(sizeof(self->operands[0]))
+    def add_operand(self, operand: LocalVariable*) -> None:
+        self->operands = realloc(self->operands, sizeof(self->operands[0]) * (self->noperands + 1))
         assert self->operands != NULL
-        self->operands[0] = operand
-
-    def set_2_operands(self, operand1: LocalVariable*, operand2: LocalVariable*) -> None:
-        self->noperands = 2
-        self->operands = malloc(2 * sizeof(self->operands[0]))
-        assert self->operands != NULL
-        self->operands[0] = operand1
-        self->operands[1] = operand2
+        self->operands[self->noperands++] = operand
 
 
 class CfBlock: