/* Perform doloop optimizations
- Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
- Inc.
+ Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010
+ Free Software Foundation, Inc.
Based on code by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz)
This file is part of GCC.
op0 = force_operand (op0, NULL_RTX);
op1 = force_operand (op1, NULL_RTX);
label = block_label (dest);
- do_compare_rtx_and_jump (op0, op1, code, 0, mode, NULL_RTX, NULL_RTX, label);
+ do_compare_rtx_and_jump (op0, op1, code, 0, mode, NULL_RTX,
+ NULL_RTX, label, -1);
jump = get_last_insn ();
if (!jump || !JUMP_P (jump))
redirect_edge_and_branch_force (*e, dest);
return false;
}
-
+
JUMP_LABEL (jump) = label;
/* The jump is supposed to handle an unlikely special case. */
end of the loop. CONDITION is the condition separated from the
DOLOOP_SEQ. COUNT is the number of iterations of the LOOP.
ZERO_EXTEND_P says to zero extend COUNT after the increment of it to
- word_mode. */
+ word_mode from FROM_MODE. */
static void
doloop_modify (struct loop *loop, struct niter_desc *desc,
- rtx doloop_seq, rtx condition, rtx count, bool zero_extend_p)
+ rtx doloop_seq, rtx condition, rtx count,
+ bool zero_extend_p, enum machine_mode from_mode)
{
rtx counter_reg;
rtx tmp, noloop = NULL_RTX;
}
if (increment_count)
- count = simplify_gen_binary (PLUS, mode, count, const1_rtx);
+ count = simplify_gen_binary (PLUS, from_mode, count, const1_rtx);
if (zero_extend_p)
count = simplify_gen_unary (ZERO_EXTEND, word_mode,
- count, mode);
+ count, from_mode);
/* Insert initialization of the count register into the loop header. */
start_sequence ();
set_zero->count = preheader->count;
set_zero->frequency = preheader->frequency;
}
-
+
if (EDGE_COUNT (set_zero->preds) == 0)
{
/* All the conditions were simplified to false, remove the
sequence = get_insns ();
end_sequence ();
emit_insn_after (sequence, BB_END (set_zero));
-
+
set_immediate_dominator (CDI_DOMINATORS, set_zero,
recompute_dominator (CDI_DOMINATORS,
set_zero));
if (true_prob_val)
{
/* Seems safer to use the branch probability. */
- add_reg_note (jump_insn, REG_BR_PROB,
+ add_reg_note (jump_insn, REG_BR_PROB,
GEN_INT (desc->in_edge->probability));
}
}
return false;
}
- doloop_modify (loop, desc, doloop_seq, condition, count, zero_extend_p);
+ doloop_modify (loop, desc, doloop_seq, condition, count,
+ zero_extend_p, mode);
return true;
}