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added global code motion

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Lorenzo Torres 2026-01-14 18:36:27 +01:00
parent 09d6cf4b46
commit 032c04ad1d
4 changed files with 1341 additions and 17 deletions
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45
ir.h
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@ -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