Share action code more effectively

Restructure action code to match equivalent code better, create
another static function to outline code and shrink binary.

Signed-off-by: Keith Packard <keithp@keithp.com>

snek-gram.ll

@@ -254,6 +254,7 @@ for-stat	: FOR NAME
 				value_push_offset(snek_code_prev_insn());
 				/* push 3 - while_else_stat_off */
 				value_push_offset(snek_code_current());
+			}@ @{
 				for_depth--;
 			}@
 		  while-else-stat
@@ -300,10 +301,7 @@ suite		: simple-stat
 expr		: expr-and expr-or-p
 		;
 expr-or-p	: OR
-			@{
-				snek_code_add_op_offset(snek_op_branch_true, 0);
-				value_push_offset(snek_compile_prev);
-			}@
+			@ bool_branch(snek_op_branch_true); @
 		  expr-and
 			@ short_second(); @
 		  expr-or-p
@@ -312,10 +310,7 @@ expr-or-p	: OR
 expr-and	: expr-not expr-and-p
 		;
 expr-and-p	: AND
-			@{
-				snek_code_add_op_offset(snek_op_branch_false, 0);
-				value_push_offset(snek_compile_prev);
-			}@
+			@ bool_branch(snek_op_branch_false); @
 		  expr-not
 			@ short_second(); @
 		  expr-and-p
@@ -495,10 +490,10 @@ expr-prim	: OP opt-tuple CP
 			}@
 		| OS opt-actuals CS
 			@{
-				snek_offset_t num = value_pop().offset;
-				if (num >= 256)
+				snek_offset_t offset = value_pop().offset;
+				if (offset >= 256)
 					return parse_return_syntax;
-				snek_code_add_op_offset(snek_op_list, num);
+				snek_code_add_op_offset(snek_op_list, offset);
 			}@
 {SNEK_DICT
 		| OC
@@ -509,8 +504,8 @@ expr-prim	: OP opt-tuple CP
 		  opt-dict-ents CC
 			@{
 				/* Fetch the number of entries compiled */
-				snek_offset_t num = value_pop().offset;
-				snek_code_add_op_offset(snek_op_dict, num);
+				snek_offset_t offset = value_pop().offset;
+				snek_code_add_op_offset(snek_op_dict, offset);
 			}@
 }
 		| NAME

snek-parse.c

@@ -209,6 +209,12 @@ static inline void unop_second(void)
 	snek_code_add_op(value_pop().op);
 }
 
+static inline void bool_branch(snek_op_t op)
+{
+	snek_code_add_op_offset(op, 0);
+	value_push_offset(snek_compile_prev);
+}
+
 #define PARSE_CODE
 #include "snek-gram.h"