added global code motion

ir.h

@@ -5,6 +5,8 @@
 #include "parser.h"
 
 struct _ir_node;
+struct _basic_block;
+
 struct symbol_def {
 	struct _ir_node *node;
 	bool is_lvalue;
@@ -12,6 +14,28 @@ struct symbol_def {
 
 typedef struct { char *key; struct symbol_def *value; } symbol_table;
 
+// Basic block for CFG representation
+typedef struct _basic_block {
+	int id;
+	struct _ir_node *control;        // Control node that starts this block (region, loop, proj, start)
+	struct _ir_node **nodes;         // Scheduled nodes in this block (stb_ds array)
+	struct _basic_block **preds;     // Predecessor blocks (stb_ds array)
+	struct _basic_block **succs;     // Successor blocks (stb_ds array)
+	struct _basic_block *idom;       // Immediate dominator
+	struct _basic_block **dom_children; // Children in dominator tree (stb_ds array)
+	int dom_depth;                   // Depth in dominator tree
+	int loop_depth;                  // Loop nesting depth (for GCM optimization)
+	bool visited;                    // For graph traversals
+} basic_block;
+
+// Function representation after GCM
+typedef struct {
+	char *name;
+	basic_block *entry;              // Entry block
+	basic_block **blocks;            // All blocks in RPO order (stb_ds array)
+	int block_count;
+} ir_function;
+
 typedef enum {
 	OC_START,
 	OC_ADD,
@@ -24,6 +48,13 @@ typedef enum {
 	OC_BXOR,
 	OC_NEG,
 	OC_EQ,
+	OC_NEQ,
+	OC_LT,
+	OC_GT,
+	OC_LE,
+	OC_GE,
+	OC_AND,
+	OC_OR,
 
 	OC_CONST_INT,
 	OC_CONST_FLOAT,
@@ -40,6 +71,9 @@ typedef enum {
 
 	OC_IF,
 	OC_PROJ,
+	OC_LOOP,
+
+	OC_CALL,
 
 	OC_STOP,
 	OC_RETURN,
@@ -57,9 +91,20 @@ typedef struct _ir_node {
 		f64 const_float;
 		symbol_table **symbol_tables;
 		char *start_name;
+		char *call_name;
 	} data;
+	// GCM scheduling fields
+	struct _basic_block *early;      // Earliest legal block
+	struct _basic_block *late;       // Latest legal block
+	struct _basic_block *block;      // Final scheduled block
+	bool pinned;                     // True if node must stay in its block (control nodes, phi, etc.)
+	bool scheduled;                  // True if already scheduled
 } ir_node;
 
 void ir_build(ast_node *ast);
 
+// Global Code Motion and Scheduling
+ir_function *gcm_schedule(ir_node *func_start);
+void gcm_print_scheduled(ir_function *func);
+
 #endif

sema.c

@@ -558,11 +558,20 @@ static type *get_expression_type(sema *s, ast_node *node)
 			node->expr_type = t;
 			return t;
 		case NODE_CALL:
-			prot = shget(prototypes, intern_string(s, node->expr.call.name, node->expr.call.name_len));
+			node->expr.call.name = intern_string(s, node->expr.call.name, node->expr.call.name_len);
+			prot = shget(prototypes, node->expr.call.name);
 			if (!prot) {
 				error(node, "unknown function.");
 				return NULL;
 			}
+			// Process call arguments
+			ast_node *arg = node->expr.call.parameters;
+			while (arg && arg->type == NODE_UNIT) {
+				if (arg->expr.unit_node.expr) {
+					get_expression_type(s, arg->expr.unit_node.expr);
+				}
+				arg = arg->expr.unit_node.next;
+			}
 			t = prot->type;
 			node->expr_type = t;
 			return t;

test.l

@@ -1,12 +1,8 @@
-u32 main(u32 b)
+u32 main(u32 n)
 {
-	u32 a = 4;
+	i32 i = 0;
-	//return a;
+	loop while i < 10 {
-	if (b == 3) {
+		i = i + 1;
-		return 3;
-	} else {
-		return 4;
 	}
-	
+	return i;
-	return a;
 }