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re PR rtl-optimization/52203 (ICE: in reset_sched_cycles_in_current_ebb, at sel-sched.c:7136 with -fsel-sched-pipelining -fselective-scheduling2 and other custom flags) 

PR rtl-optimization/52203
        * sel-sched.c (estimate_insn_cost): New parameter pempty.  Adjust
        all callers to pass NULL except ...
        (reset_sched_cycles_in_current_ebb): ... here, save the value
        in new variable 'empty'.  Increase issue_rate only for
        non-empty insns.

From-SVN: r185036
This commit is contained in:
Andrey Belevantsev 2012-03-07 16:00:37 +04:00 committed by Andrey Belevantsev
parent d6baa4460b
commit 3f1960accc
2 changed files with 21 additions and 8 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2012-03-07 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/52203
* sel-sched.c (estimate_insn_cost): New parameter pempty. Adjust
all callers to pass NULL except ...
(reset_sched_cycles_in_current_ebb): ... here, save the value
in new variable 'empty'. Increase issue_rate only for
non-empty insns.
2012-03-07 Ralf Corsépius <ralf.corsepius@rtems.org> 2012-03-07 Ralf Corsépius <ralf.corsepius@rtems.org>
PR target/51417 PR target/51417

18
gcc/sel-sched.c
View File

@ -4265,9 +4265,10 @@ invoke_aftermath_hooks (fence_t fence, rtx best_insn, int issue_more)
return issue_more; return issue_more;
} }
/* Estimate the cost of issuing INSN on DFA state STATE. */ /* Estimate the cost of issuing INSN on DFA state STATE. Write to PEMPTY
true when INSN does not change the processor state. */
static int static int
estimate_insn_cost (rtx insn, state_t state) estimate_insn_cost (rtx insn, state_t state, bool *pempty)
{ {
static state_t temp = NULL; static state_t temp = NULL;
int cost; int cost;
@ -4277,6 +4278,8 @@ estimate_insn_cost (rtx insn, state_t state)
memcpy (temp, state, dfa_state_size); memcpy (temp, state, dfa_state_size);
cost = state_transition (temp, insn); cost = state_transition (temp, insn);
if (pempty)
*pempty = (memcmp (temp, state, dfa_state_size) == 0);
if (cost < 0) if (cost < 0)
return 0; return 0;
@ -4307,7 +4310,7 @@ get_expr_cost (expr_t expr, fence_t fence)
return 0; return 0;
} }
else else
return estimate_insn_cost (insn, FENCE_STATE (fence)); return estimate_insn_cost (insn, FENCE_STATE (fence), NULL);
} }
/* Find the best insn for scheduling, either via max_issue or just take /* Find the best insn for scheduling, either via max_issue or just take
@ -7020,7 +7023,7 @@ reset_sched_cycles_in_current_ebb (void)
{ {
int cost, haifa_cost; int cost, haifa_cost;
int sort_p; int sort_p;
bool asm_p, real_insn, after_stall, all_issued; bool asm_p, real_insn, after_stall, all_issued, empty;
int clock; int clock;
if (!INSN_P (insn)) if (!INSN_P (insn))
@ -7047,7 +7050,7 @@ reset_sched_cycles_in_current_ebb (void)
haifa_cost = 0; haifa_cost = 0;
} }
else else
haifa_cost = estimate_insn_cost (insn, curr_state); haifa_cost = estimate_insn_cost (insn, curr_state, &empty);
/* Stall for whatever cycles we've stalled before. */ /* Stall for whatever cycles we've stalled before. */
after_stall = 0; after_stall = 0;
@ -7081,7 +7084,7 @@ reset_sched_cycles_in_current_ebb (void)
if (!after_stall if (!after_stall
&& real_insn && real_insn
&& haifa_cost > 0 && haifa_cost > 0
&& estimate_insn_cost (insn, curr_state) == 0) && estimate_insn_cost (insn, curr_state, NULL) == 0)
break; break;
/* When the data dependency stall is longer than the DFA stall, /* When the data dependency stall is longer than the DFA stall,
@ -7093,7 +7096,7 @@ reset_sched_cycles_in_current_ebb (void)
if ((after_stall || all_issued) if ((after_stall || all_issued)
&& real_insn && real_insn
&& haifa_cost == 0) && haifa_cost == 0)
haifa_cost = estimate_insn_cost (insn, curr_state); haifa_cost = estimate_insn_cost (insn, curr_state, NULL);
} }
haifa_clock += i; haifa_clock += i;
@ -7125,6 +7128,7 @@ reset_sched_cycles_in_current_ebb (void)
if (real_insn) if (real_insn)
{ {
cost = state_transition (curr_state, insn); cost = state_transition (curr_state, insn);
if (!empty)
issued_insns++; issued_insns++;
if (sched_verbose >= 2) if (sched_verbose >= 2)