API to enable dumping

include/libfirm/irprog.h

@@ -291,6 +291,12 @@ FIRM_API size_t get_irp_n_asms(void);
 /** Return the global asm include at position pos. */
 FIRM_API ident *get_irp_asm(size_t pos);
 
+/** Return whether optimization dump vcg graphs */
+FIRM_API int get_irp_optimization_dumps(void);
+
+/** Enable vcg dumping of optimization */
+FIRM_API void enable_irp_optimization_dumps(void);
+
 #include "end.h"
 
 #endif

ir/ir/irprog_t.h

@@ -140,6 +140,20 @@ static inline ir_label_t _get_irp_next_label_nr(void)
 	return ++irp->last_label_nr;
 }
 
+/** Whether optimizations should dump irgs */
+static inline int _get_irp_optimization_dumps(void)
+{
+	assert(irp);
+	return irp->optimization_dumps;
+}
+
+/** Set optimizations to dump irgs */
+static inline void _enable_irp_optimization_dumps(void)
+{
+	assert(irp);
+	irp->optimization_dumps = 1;
+}
+
 void           set_irp_ip_outedges(ir_node ** ip_outedges);
 ir_node**      get_irp_ip_outedges(void);
 
@@ -164,5 +178,7 @@ void init_irprog_2(void);
 #define get_tls_type()            _get_tls_type()
 #define get_irp_next_region_nr()  _get_irp_next_region_nr()
 #define get_irp_next_label_nr()   _get_irp_next_label_nr()
+#define get_irp_optimization_dumps()     _get_irp_optimization_dumps()
+#define enable_irp_optimization_dumps()  _enable_irp_optimization_dumps()
 
 #endif

ir/ir/irtypes.h

@@ -608,6 +608,7 @@ struct ir_prog {
 	size_t max_irg_idx;                  /**< highest unused irg index */
 	long max_node_nr;                    /**< to generate unique numbers for nodes. */
 	unsigned dump_nr;                    /**< number of program info dumps */
+	unsigned optimization_dumps :1;      /**< dump irg on each optimization */
 #ifndef NDEBUG
 	ir_resources_t reserved_resources;   /**< Bitset for tracking used global resources. */
 #endif

ir/opt/opt_manage.c

@@ -4,6 +4,7 @@
 #include <stdbool.h>
 
 #include "irgraph_t.h"
+#include "irprog_t.h"
 
 #include "iroptimize.h"
 #include "irgopt.h"
@@ -14,9 +15,6 @@
 #include "irdump.h"
 #include "opt_manage.h"
 
-// TODO some API to enable dumping
-static const bool dump_opts = false;
-
 static void deactivate_entity_usage(ir_graph *irg)
 {
 	set_irg_entity_usage_state(irg, ir_entity_usage_not_computed);
@@ -62,12 +60,12 @@ void perform_irg_optimization(ir_graph *irg, optdesc_t *opt)
 	PREPARE(IR_GRAPH_STATE_VALID_EXTENDED_BLOCKS,    compute_extbb)
 
 	/* now all the requirements for the optimization are fulfilled */
-	if (dump_opts)
+	if (dump)
 		dump_ir_graph(irg, opt->name);
 
 	new_irg_state = opt->optimization(irg);
 
-	if (dump_opts)
+	if (dump)
 		dump_ir_graph(irg, opt->name);
 
 	/* unless the optimization returned that some state is retained,