diff options
Diffstat (limited to 'gcc/modulo-sched.c')
| -rw-r--r-- | gcc/modulo-sched.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/gcc/modulo-sched.c b/gcc/modulo-sched.c index 28be942..7c33be5 100644 --- a/gcc/modulo-sched.c +++ b/gcc/modulo-sched.c @@ -476,7 +476,12 @@ generate_reg_moves (partial_schedule_ptr ps, bool rescan) sbitmap *uses_of_defs; rtx last_reg_move; rtx prev_reg, old_reg; - + rtx set = single_set (u->insn); + + /* Skip instructions that do not set a register. */ + if ((set && !REG_P (SET_DEST (set)))) + continue; + /* Compute the number of reg_moves needed for u, by looking at life ranges started at u (excluding self-loops). */ for (e = u->out; e; e = e->next_out) @@ -493,6 +498,16 @@ generate_reg_moves (partial_schedule_ptr ps, bool rescan) && SCHED_COLUMN (e->dest) < SCHED_COLUMN (e->src)) nreg_moves4e--; + if (nreg_moves4e >= 1) + { + /* !single_set instructions are not supported yet and + thus we do not except to encounter them in the loop + except from the doloop part. For the latter case + we assume no regmoves are generated as the doloop + instructions are tied to the branch with an edge. */ + gcc_assert (set); + } + nreg_moves = MAX (nreg_moves, nreg_moves4e); } |