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| author | abel <abel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-04-13 09:36:42 +0000 |
|---|---|---|
| committer | abel <abel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-04-13 09:36:42 +0000 |
| commit | 30474b14bbc3623f848946b8873ec4f7599170dd (patch) | |
| tree | b3ac87c736a413b3a27159041e762bb457b93798 /gcc/sel-sched.c | |
| parent | d1d7b24c1e751dc5fa0e6f945bb74a9ce0bbb0bd (diff) | |
| download | gcc-30474b14bbc3623f848946b8873ec4f7599170dd.tar.gz | |
PR rtl-optimization/52203
PR rtl-optimization/52715
Revert the 2012-03-07 fix for PR 52203.
* sel-sched.c (reset_sched_cycles_in_current_ebb): Check that
the insn does not modify DFA right before issuing, adjust
issue_rate accordingly.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@186410 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/sel-sched.c')
| -rw-r--r-- | gcc/sel-sched.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c index 4e13230ed69..ce38fa0e59f 100644 --- a/gcc/sel-sched.c +++ b/gcc/sel-sched.c @@ -4265,10 +4265,9 @@ invoke_aftermath_hooks (fence_t fence, rtx best_insn, int issue_more) return issue_more; } -/* Estimate the cost of issuing INSN on DFA state STATE. Write to PEMPTY - true when INSN does not change the processor state. */ +/* Estimate the cost of issuing INSN on DFA state STATE. */ static int -estimate_insn_cost (rtx insn, state_t state, bool *pempty) +estimate_insn_cost (rtx insn, state_t state) { static state_t temp = NULL; int cost; @@ -4278,8 +4277,6 @@ estimate_insn_cost (rtx insn, state_t state, bool *pempty) memcpy (temp, state, dfa_state_size); cost = state_transition (temp, insn); - if (pempty) - *pempty = (memcmp (temp, state, dfa_state_size) == 0); if (cost < 0) return 0; @@ -4310,7 +4307,7 @@ get_expr_cost (expr_t expr, fence_t fence) return 0; } else - return estimate_insn_cost (insn, FENCE_STATE (fence), NULL); + return estimate_insn_cost (insn, FENCE_STATE (fence)); } /* Find the best insn for scheduling, either via max_issue or just take @@ -7023,7 +7020,7 @@ reset_sched_cycles_in_current_ebb (void) { int cost, haifa_cost; int sort_p; - bool asm_p, real_insn, after_stall, all_issued, empty; + bool asm_p, real_insn, after_stall, all_issued; int clock; if (!INSN_P (insn)) @@ -7050,7 +7047,7 @@ reset_sched_cycles_in_current_ebb (void) haifa_cost = 0; } else - haifa_cost = estimate_insn_cost (insn, curr_state, &empty); + haifa_cost = estimate_insn_cost (insn, curr_state); /* Stall for whatever cycles we've stalled before. */ after_stall = 0; @@ -7084,7 +7081,7 @@ reset_sched_cycles_in_current_ebb (void) if (!after_stall && real_insn && haifa_cost > 0 - && estimate_insn_cost (insn, curr_state, NULL) == 0) + && estimate_insn_cost (insn, curr_state) == 0) break; /* When the data dependency stall is longer than the DFA stall, @@ -7096,7 +7093,7 @@ reset_sched_cycles_in_current_ebb (void) if ((after_stall || all_issued) && real_insn && haifa_cost == 0) - haifa_cost = estimate_insn_cost (insn, curr_state, NULL); + haifa_cost = estimate_insn_cost (insn, curr_state); } haifa_clock += i; @@ -7127,8 +7124,14 @@ reset_sched_cycles_in_current_ebb (void) if (real_insn) { + static state_t temp = NULL; + + if (!temp) + temp = xmalloc (dfa_state_size); + memcpy (temp, curr_state, dfa_state_size); + cost = state_transition (curr_state, insn); - if (!empty) + if (memcmp (temp, curr_state, dfa_state_size)) issued_insns++; if (sched_verbose >= 2) |