2007-09-07 Richard Sandiford <richard@codesourcery.com>
+ * config/mips/mips.c (mips_base_move_loop_invariants): New variable.
+ (mips_set_mips16_mode): Restore flag_move_loop_invariants, then set
+ to 0 for MIPS16.
+ (override_options): Set mips_base_move_loop_invariants.
+
+2007-09-07 Richard Sandiford <richard@codesourcery.com>
+
* config/mips/mips.opt (mcode-readable=): Move to keep list
alphabetical.
/* Similar copies of option settings. */
static int mips_base_schedule_insns; /* flag_schedule_insns */
static int mips_base_reorder_blocks_and_partition; /* flag_reorder... */
+static int mips_base_move_loop_invariants; /* flag_move_loop_invariants */
static int mips_base_align_loops; /* align_loops */
static int mips_base_align_jumps; /* align_jumps */
static int mips_base_align_functions; /* align_functions */
align_functions = mips_base_align_functions;
flag_schedule_insns = mips_base_schedule_insns;
flag_reorder_blocks_and_partition = mips_base_reorder_blocks_and_partition;
+ flag_move_loop_invariants = mips_base_move_loop_invariants;
flag_delayed_branch = mips_flag_delayed_branch;
if (mips16_p)
flag_schedule_insns = 0;
/* Don't do hot/cold partitioning. The constant layout code expects
- the whole function to be in a single section. */
+ the whole function to be in a single section. */
flag_reorder_blocks_and_partition = 0;
+ /* Don't move loop invariants, because it tends to increase
+ register pressure. It also introduces an extra move in cases
+ where the constant is the first operand in a two-operand binary
+ instruction, or when it forms a register argument to a functon
+ call. */
+ flag_move_loop_invariants = 0;
+
/* Silently disable -mexplicit-relocs since it doesn't apply
to mips16 code. Even so, it would overly pedantic to warn
about "-mips16 -mexplicit-relocs", especially given that
mips_base_target_flags = target_flags;
mips_base_schedule_insns = flag_schedule_insns;
mips_base_reorder_blocks_and_partition = flag_reorder_blocks_and_partition;
+ mips_base_move_loop_invariants = flag_move_loop_invariants;
mips_base_align_loops = align_loops;
mips_base_align_jumps = align_jumps;
mips_base_align_functions = align_functions;