From e9593da8cc07949e85354d1ff316438e63be076d Mon Sep 17 00:00:00 2001 From: James E Wilson Date: Tue, 10 Oct 2017 20:23:41 -0700 Subject: [PATCH] Allow 2 insns from sched group to issue in same cycle, if no stalls needed. gcc/ PR rtl-optimization/81434 * haifa-sched.c (prune_ready_list): Init min_cost_group to 0. Update comment for main loop. In sched_group_found if, also add checks for pass and min_cost_group. From-SVN: r253628 --- gcc/ChangeLog | 7 +++++++ gcc/haifa-sched.c | 9 +++++---- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e42eb5062ea..61ec983c83e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2017-10-10 Jim Wilson + + PR rtl-optimization/81434 + * haifa-sched.c (prune_ready_list): Init min_cost_group to 0. Update + comment for main loop. In sched_group_found if, also add checks for + pass and min_cost_group. + 2017-10-10 Segher Boessenkool * config/rs6000/rs6000.c (TARGET_INSN_COST): New. diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c index e7014cbb8b3..d6dab57101b 100644 --- a/gcc/haifa-sched.c +++ b/gcc/haifa-sched.c @@ -6303,7 +6303,7 @@ prune_ready_list (state_t temp_state, bool first_cycle_insn_p, { int i, pass; bool sched_group_found = false; - int min_cost_group = 1; + int min_cost_group = 0; if (sched_fusion) return; @@ -6319,8 +6319,8 @@ prune_ready_list (state_t temp_state, bool first_cycle_insn_p, } /* Make two passes if there's a SCHED_GROUP_P insn; make sure to handle - such an insn first and note its cost, then schedule all other insns - for one cycle later. */ + such an insn first and note its cost. If at least one SCHED_GROUP_P insn + gets queued, then all other insns get queued for one cycle later. */ for (pass = sched_group_found ? 0 : 1; pass < 2; ) { int n = ready.n_ready; @@ -6333,7 +6333,8 @@ prune_ready_list (state_t temp_state, bool first_cycle_insn_p, if (DEBUG_INSN_P (insn)) continue; - if (sched_group_found && !SCHED_GROUP_P (insn)) + if (sched_group_found && !SCHED_GROUP_P (insn) + && ((pass == 0) || (min_cost_group >= 1))) { if (pass == 0) continue; -- 2.30.2