231 lines
7.2 KiB
Diff
231 lines
7.2 KiB
Diff
2010-01-05 Alexandre Oliva <aoliva@redhat.com>
|
||
|
||
* params.def (PARAM_MAX_VARTRACK_SIZE): New.
|
||
* doc/invoke.texi: Document it.
|
||
* var-tracking.c: Include toplev.h and params.h.
|
||
(vt_find_locations): Return bool indicating success. Compute
|
||
hash sizes unconditionally. Check new parameter, report.
|
||
(variable_tracking_main_1): Check vt_find_locations results and
|
||
retry. Renamed from...
|
||
(variable_tracking_main): ... this. New wrapper to preserve
|
||
flag_var_tracking_assignments.
|
||
* Makefile.in (var-tracking.o): Adjust dependencies.
|
||
|
||
--- gcc/doc/invoke.texi.jj 2009-12-09 00:36:51.000000000 +0100
|
||
+++ gcc/doc/invoke.texi 2010-01-05 10:23:34.000000000 +0100
|
||
@@ -7937,6 +7937,15 @@ with more basic blocks than this paramet
|
||
motion optimization performed on them. The default value of the
|
||
parameter is 1000 for -O1 and 10000 for -O2 and above.
|
||
|
||
+@item max-vartrack-size
|
||
+Sets a maximum number of hash table slots to use during variable
|
||
+tracking dataflow analysis of any function. If this limit is exceeded
|
||
+with variable tracking at assignments enabled, analysis for that
|
||
+function is retried without it, after removing all debug insns from
|
||
+the function. If the limit is exceeded even without debug insns, var
|
||
+tracking analysis is completely disabled for the function. Setting
|
||
+the parameter to zero makes it unlimited.
|
||
+
|
||
@item min-nondebug-insn-uid
|
||
Use uids starting at this parameter for nondebug insns. The range below
|
||
the parameter is reserved exclusively for debug insns created by
|
||
--- gcc/params.def.jj 2009-09-16 21:35:17.000000000 +0200
|
||
+++ gcc/params.def 2010-01-06 10:18:04.000000000 +0100
|
||
@@ -771,6 +771,13 @@ DEFPARAM (PARAM_LOOP_INVARIANT_MAX_BBS_I
|
||
"max basic blocks number in loop for loop invariant motion",
|
||
10000, 0, 0)
|
||
|
||
+/* Set maximum hash table size for var tracking. */
|
||
+
|
||
+DEFPARAM (PARAM_MAX_VARTRACK_SIZE,
|
||
+ "max-vartrack-size",
|
||
+ "Max. size of var tracking hash tables",
|
||
+ 50000000, 0, 0)
|
||
+
|
||
/* Set minimum insn uid for non-debug insns. */
|
||
|
||
DEFPARAM (PARAM_MIN_NONDEBUG_INSN_UID,
|
||
--- gcc/var-tracking.c.jj 2009-12-17 20:42:04.000000000 +0100
|
||
+++ gcc/var-tracking.c 2010-01-06 10:17:28.000000000 +0100
|
||
@@ -108,6 +108,8 @@
|
||
#include "tree-pass.h"
|
||
#include "cselib.h"
|
||
#include "target.h"
|
||
+#include "toplev.h"
|
||
+#include "params.h"
|
||
|
||
/* Type of micro operation. */
|
||
enum micro_operation_type
|
||
@@ -443,7 +445,7 @@ static int add_uses (rtx *, void *);
|
||
static void add_uses_1 (rtx *, void *);
|
||
static void add_stores (rtx, const_rtx, void *);
|
||
static bool compute_bb_dataflow (basic_block);
|
||
-static void vt_find_locations (void);
|
||
+static bool vt_find_locations (void);
|
||
|
||
static void dump_attrs_list (attrs);
|
||
static int dump_variable_slot (void **, void *);
|
||
@@ -5454,7 +5456,7 @@ compute_bb_dataflow (basic_block bb)
|
||
|
||
/* Find the locations of variables in the whole function. */
|
||
|
||
-static void
|
||
+static bool
|
||
vt_find_locations (void)
|
||
{
|
||
fibheap_t worklist, pending, fibheap_swap;
|
||
@@ -5465,6 +5467,8 @@ vt_find_locations (void)
|
||
int *rc_order;
|
||
int i;
|
||
int htabsz = 0;
|
||
+ int htabmax = PARAM_VALUE (PARAM_MAX_VARTRACK_SIZE);
|
||
+ bool success = true;
|
||
|
||
/* Compute reverse completion order of depth first search of the CFG
|
||
so that the data-flow runs faster. */
|
||
@@ -5486,7 +5490,7 @@ vt_find_locations (void)
|
||
fibheap_insert (pending, bb_order[bb->index], bb);
|
||
sbitmap_ones (in_pending);
|
||
|
||
- while (!fibheap_empty (pending))
|
||
+ while (success && !fibheap_empty (pending))
|
||
{
|
||
fibheap_swap = pending;
|
||
pending = worklist;
|
||
@@ -5509,11 +5513,11 @@ vt_find_locations (void)
|
||
|
||
SET_BIT (visited, bb->index);
|
||
|
||
- if (dump_file && VTI (bb)->in.vars)
|
||
+ if (VTI (bb)->in.vars)
|
||
{
|
||
htabsz
|
||
- -= htab_size (shared_hash_htab (VTI (bb)->in.vars))
|
||
- + htab_size (shared_hash_htab (VTI (bb)->out.vars));
|
||
+ -= (htab_size (shared_hash_htab (VTI (bb)->in.vars))
|
||
+ + htab_size (shared_hash_htab (VTI (bb)->out.vars)));
|
||
oldinsz
|
||
= htab_elements (shared_hash_htab (VTI (bb)->in.vars));
|
||
oldoutsz
|
||
@@ -5577,9 +5581,20 @@ vt_find_locations (void)
|
||
}
|
||
|
||
changed = compute_bb_dataflow (bb);
|
||
- if (dump_file)
|
||
- htabsz += htab_size (shared_hash_htab (VTI (bb)->in.vars))
|
||
- + htab_size (shared_hash_htab (VTI (bb)->out.vars));
|
||
+ htabsz += (htab_size (shared_hash_htab (VTI (bb)->in.vars))
|
||
+ + htab_size (shared_hash_htab (VTI (bb)->out.vars)));
|
||
+
|
||
+ if (htabmax && htabsz > htabmax)
|
||
+ {
|
||
+ if (MAY_HAVE_DEBUG_INSNS)
|
||
+ inform (DECL_SOURCE_LOCATION (cfun->decl),
|
||
+ "variable tracking size limit exceeded with debug insns, retrying without");
|
||
+ else
|
||
+ inform (DECL_SOURCE_LOCATION (cfun->decl),
|
||
+ "variable tracking size limit exceeded");
|
||
+ success = false;
|
||
+ break;
|
||
+ }
|
||
|
||
if (changed)
|
||
{
|
||
@@ -5630,7 +5645,7 @@ vt_find_locations (void)
|
||
}
|
||
}
|
||
|
||
- if (MAY_HAVE_DEBUG_INSNS)
|
||
+ if (success && MAY_HAVE_DEBUG_INSNS)
|
||
FOR_EACH_BB (bb)
|
||
gcc_assert (VTI (bb)->flooded);
|
||
|
||
@@ -5640,6 +5655,8 @@ vt_find_locations (void)
|
||
sbitmap_free (visited);
|
||
sbitmap_free (in_worklist);
|
||
sbitmap_free (in_pending);
|
||
+
|
||
+ return success;
|
||
}
|
||
|
||
/* Print the content of the LIST to dump file. */
|
||
@@ -7542,9 +7558,11 @@ vt_finalize (void)
|
||
|
||
/* The entry point to variable tracking pass. */
|
||
|
||
-unsigned int
|
||
-variable_tracking_main (void)
|
||
+static inline unsigned int
|
||
+variable_tracking_main_1 (void)
|
||
{
|
||
+ bool success;
|
||
+
|
||
if (flag_var_tracking_assignments < 0)
|
||
{
|
||
delete_debug_insns ();
|
||
@@ -7569,7 +7587,31 @@ variable_tracking_main (void)
|
||
}
|
||
}
|
||
|
||
- vt_find_locations ();
|
||
+ success = vt_find_locations ();
|
||
+
|
||
+ if (!success && flag_var_tracking_assignments > 0)
|
||
+ {
|
||
+ vt_finalize ();
|
||
+
|
||
+ delete_debug_insns ();
|
||
+
|
||
+ /* This is later restored by our caller. */
|
||
+ flag_var_tracking_assignments = 0;
|
||
+
|
||
+ vt_initialize ();
|
||
+
|
||
+ if (!frame_pointer_needed && !vt_stack_adjustments ())
|
||
+ gcc_unreachable ();
|
||
+
|
||
+ success = vt_find_locations ();
|
||
+ }
|
||
+
|
||
+ if (!success)
|
||
+ {
|
||
+ vt_finalize ();
|
||
+ vt_debug_insns_local (false);
|
||
+ return 0;
|
||
+ }
|
||
|
||
if (dump_file && (dump_flags & TDF_DETAILS))
|
||
{
|
||
@@ -7583,6 +7625,19 @@ variable_tracking_main (void)
|
||
vt_debug_insns_local (false);
|
||
return 0;
|
||
}
|
||
+
|
||
+unsigned int
|
||
+variable_tracking_main (void)
|
||
+{
|
||
+ unsigned int ret;
|
||
+ int save = flag_var_tracking_assignments;
|
||
+
|
||
+ ret = variable_tracking_main_1 ();
|
||
+
|
||
+ flag_var_tracking_assignments = save;
|
||
+
|
||
+ return ret;
|
||
+}
|
||
|
||
static bool
|
||
gate_handle_var_tracking (void)
|
||
--- gcc/Makefile.in.jj 2010-01-04 10:07:40.000000000 +0100
|
||
+++ gcc/Makefile.in 2010-01-05 10:24:39.000000000 +0100
|
||
@@ -2750,7 +2750,8 @@ regstat.o : regstat.c $(CONFIG_H) $(SYST
|
||
var-tracking.o : var-tracking.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) \
|
||
$(RTL_H) $(TREE_H) hard-reg-set.h insn-config.h reload.h $(FLAGS_H) \
|
||
$(BASIC_BLOCK_H) output.h sbitmap.h alloc-pool.h $(FIBHEAP_H) $(HASHTAB_H) \
|
||
- $(REGS_H) $(EXPR_H) $(TIMEVAR_H) tree-pass.h cselib.h $(TARGET_H)
|
||
+ $(REGS_H) $(EXPR_H) $(TIMEVAR_H) tree-pass.h cselib.h $(TARGET_H) \
|
||
+ $(TOPLEV_H) $(PARAMS_H)
|
||
profile.o : profile.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
|
||
$(TREE_H) $(FLAGS_H) output.h $(REGS_H) $(EXPR_H) $(FUNCTION_H) \
|
||
$(TOPLEV_H) $(COVERAGE_H) $(TREE_FLOW_H) value-prof.h cfghooks.h \
|