/* Convert tree expression to rtl instructions, for GNU compiler.
Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GCC.
#include "langhooks.h"
#include "ggc.h"
#include "basic-block.h"
+#include "output.h"
static bool prefer_and_bit_test (enum machine_mode, int);
-static void do_jump_by_parts_greater (tree, tree, int, rtx, rtx);
-static void do_jump_by_parts_equality (tree, tree, rtx, rtx);
+static void do_jump_by_parts_greater (tree, tree, int, rtx, rtx, int);
+static void do_jump_by_parts_equality (tree, tree, rtx, rtx, int);
static void do_compare_and_jump (tree, tree, enum rtx_code, enum rtx_code, rtx,
- rtx);
+ rtx, int);
+
+/* Invert probability if there is any. -1 stands for unknown. */
+
+static inline int
+inv (int prob)
+{
+ return prob == -1 ? -1 : REG_BR_PROB_BASE - prob;
+}
/* At the start of a function, record that we have no previously-pushed
arguments waiting to be popped. */
functions here. */
void
-jumpifnot (tree exp, rtx label)
+jumpifnot (tree exp, rtx label, int prob)
{
- do_jump (exp, label, NULL_RTX);
+ do_jump (exp, label, NULL_RTX, inv (prob));
}
void
-jumpifnot_1 (enum tree_code code, tree op0, tree op1, rtx label)
+jumpifnot_1 (enum tree_code code, tree op0, tree op1, rtx label, int prob)
{
- do_jump_1 (code, op0, op1, label, NULL_RTX);
+ do_jump_1 (code, op0, op1, label, NULL_RTX, inv (prob));
}
/* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */
void
-jumpif (tree exp, rtx label)
+jumpif (tree exp, rtx label, int prob)
{
- do_jump (exp, NULL_RTX, label);
+ do_jump (exp, NULL_RTX, label, prob);
}
void
-jumpif_1 (enum tree_code code, tree op0, tree op1, rtx label)
+jumpif_1 (enum tree_code code, tree op0, tree op1, rtx label, int prob)
{
- do_jump_1 (code, op0, op1, NULL_RTX, label);
+ do_jump_1 (code, op0, op1, NULL_RTX, label, prob);
}
/* Used internally by prefer_and_bit_test. */
}
/* Subroutine of do_jump, dealing with exploded comparisons of the type
- OP0 CODE OP1 . IF_FALSE_LABEL and IF_TRUE_LABEL like in do_jump. */
+ OP0 CODE OP1 . IF_FALSE_LABEL and IF_TRUE_LABEL like in do_jump.
+ PROB is probability of jump to if_true_label, or -1 if unknown. */
void
do_jump_1 (enum tree_code code, tree op0, tree op1,
- rtx if_false_label, rtx if_true_label)
+ rtx if_false_label, rtx if_true_label, int prob)
{
enum machine_mode mode;
rtx drop_through_label = 0;
!= MODE_COMPLEX_INT);
if (integer_zerop (op1))
- do_jump (op0, if_true_label, if_false_label);
+ do_jump (op0, if_true_label, if_false_label, inv (prob));
else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT
&& !can_compare_p (EQ, TYPE_MODE (inner_type), ccp_jump))
- do_jump_by_parts_equality (op0, op1, if_false_label, if_true_label);
+ do_jump_by_parts_equality (op0, op1, if_false_label, if_true_label,
+ prob);
else
- do_compare_and_jump (op0, op1, EQ, EQ, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, EQ, EQ, if_false_label, if_true_label,
+ prob);
break;
}
!= MODE_COMPLEX_INT);
if (integer_zerop (op1))
- do_jump (op0, if_false_label, if_true_label);
+ do_jump (op0, if_false_label, if_true_label, prob);
else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT
&& !can_compare_p (NE, TYPE_MODE (inner_type), ccp_jump))
- do_jump_by_parts_equality (op0, op1, if_true_label, if_false_label);
+ do_jump_by_parts_equality (op0, op1, if_true_label, if_false_label,
+ inv (prob));
else
- do_compare_and_jump (op0, op1, NE, NE, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, NE, NE, if_false_label, if_true_label,
+ prob);
break;
}
mode = TYPE_MODE (TREE_TYPE (op0));
if (GET_MODE_CLASS (mode) == MODE_INT
&& ! can_compare_p (LT, mode, ccp_jump))
- do_jump_by_parts_greater (op0, op1, 1, if_false_label, if_true_label);
+ do_jump_by_parts_greater (op0, op1, 1, if_false_label, if_true_label,
+ prob);
else
- do_compare_and_jump (op0, op1, LT, LTU, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, LT, LTU, if_false_label, if_true_label,
+ prob);
break;
case LE_EXPR:
mode = TYPE_MODE (TREE_TYPE (op0));
if (GET_MODE_CLASS (mode) == MODE_INT
&& ! can_compare_p (LE, mode, ccp_jump))
- do_jump_by_parts_greater (op0, op1, 0, if_true_label, if_false_label);
+ do_jump_by_parts_greater (op0, op1, 0, if_true_label, if_false_label,
+ inv (prob));
else
- do_compare_and_jump (op0, op1, LE, LEU, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, LE, LEU, if_false_label, if_true_label,
+ prob);
break;
case GT_EXPR:
mode = TYPE_MODE (TREE_TYPE (op0));
if (GET_MODE_CLASS (mode) == MODE_INT
&& ! can_compare_p (GT, mode, ccp_jump))
- do_jump_by_parts_greater (op0, op1, 0, if_false_label, if_true_label);
+ do_jump_by_parts_greater (op0, op1, 0, if_false_label, if_true_label,
+ prob);
else
- do_compare_and_jump (op0, op1, GT, GTU, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, GT, GTU, if_false_label, if_true_label,
+ prob);
break;
case GE_EXPR:
mode = TYPE_MODE (TREE_TYPE (op0));
if (GET_MODE_CLASS (mode) == MODE_INT
&& ! can_compare_p (GE, mode, ccp_jump))
- do_jump_by_parts_greater (op0, op1, 1, if_true_label, if_false_label);
+ do_jump_by_parts_greater (op0, op1, 1, if_true_label, if_false_label,
+ inv (prob));
else
- do_compare_and_jump (op0, op1, GE, GEU, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, GE, GEU, if_false_label, if_true_label,
+ prob);
break;
case ORDERED_EXPR:
do_compare_and_jump (op0, op1, ORDERED, ORDERED,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case UNORDERED_EXPR:
do_compare_and_jump (op0, op1, UNORDERED, UNORDERED,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case UNLT_EXPR:
- do_compare_and_jump (op0, op1, UNLT, UNLT, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, UNLT, UNLT, if_false_label, if_true_label,
+ prob);
break;
case UNLE_EXPR:
- do_compare_and_jump (op0, op1, UNLE, UNLE, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, UNLE, UNLE, if_false_label, if_true_label,
+ prob);
break;
case UNGT_EXPR:
- do_compare_and_jump (op0, op1, UNGT, UNGT, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, UNGT, UNGT, if_false_label, if_true_label,
+ prob);
break;
case UNGE_EXPR:
- do_compare_and_jump (op0, op1, UNGE, UNGE, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, UNGE, UNGE, if_false_label, if_true_label,
+ prob);
break;
case UNEQ_EXPR:
- do_compare_and_jump (op0, op1, UNEQ, UNEQ, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, UNEQ, UNEQ, if_false_label, if_true_label,
+ prob);
break;
case LTGT_EXPR:
- do_compare_and_jump (op0, op1, LTGT, LTGT, if_false_label, if_true_label);
+ do_compare_and_jump (op0, op1, LTGT, LTGT, if_false_label, if_true_label,
+ prob);
break;
case TRUTH_ANDIF_EXPR:
if (if_false_label == NULL_RTX)
{
drop_through_label = gen_label_rtx ();
- do_jump (op0, drop_through_label, NULL_RTX);
- do_jump (op1, NULL_RTX, if_true_label);
+ do_jump (op0, drop_through_label, NULL_RTX, prob);
+ do_jump (op1, NULL_RTX, if_true_label, prob);
}
else
{
- do_jump (op0, if_false_label, NULL_RTX);
- do_jump (op1, if_false_label, if_true_label);
+ do_jump (op0, if_false_label, NULL_RTX, prob);
+ do_jump (op1, if_false_label, if_true_label, prob);
}
break;
if (if_true_label == NULL_RTX)
{
drop_through_label = gen_label_rtx ();
- do_jump (op0, NULL_RTX, drop_through_label);
- do_jump (op1, if_false_label, NULL_RTX);
+ do_jump (op0, NULL_RTX, drop_through_label, prob);
+ do_jump (op1, if_false_label, NULL_RTX, prob);
}
else
{
- do_jump (op0, NULL_RTX, if_true_label);
- do_jump (op1, if_false_label, if_true_label);
+ do_jump (op0, NULL_RTX, if_true_label, prob);
+ do_jump (op1, if_false_label, if_true_label, prob);
}
break;
do_jump always does any pending stack adjust except when it does not
actually perform a jump. An example where there is no jump
- is when EXP is `(foo (), 0)' and IF_FALSE_LABEL is null. */
+ is when EXP is `(foo (), 0)' and IF_FALSE_LABEL is null.
+
+ PROB is probability of jump to if_true_label, or -1 if unknown. */
void
-do_jump (tree exp, rtx if_false_label, rtx if_true_label)
+do_jump (tree exp, rtx if_false_label, rtx if_true_label, int prob)
{
enum tree_code code = TREE_CODE (exp);
rtx temp;
case LROTATE_EXPR:
case RROTATE_EXPR:
/* These cannot change zero->nonzero or vice versa. */
- do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label);
+ do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label, prob);
break;
case TRUTH_NOT_EXPR:
- do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label);
+ do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label,
+ inv (prob));
break;
case COND_EXPR:
}
do_pending_stack_adjust ();
- do_jump (TREE_OPERAND (exp, 0), label1, NULL_RTX);
- do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label);
+ do_jump (TREE_OPERAND (exp, 0), label1, NULL_RTX, -1);
+ do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label, prob);
emit_label (label1);
- do_jump (TREE_OPERAND (exp, 2), if_false_label, if_true_label);
+ do_jump (TREE_OPERAND (exp, 2), if_false_label, if_true_label, prob);
break;
}
&& TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp))
&& have_insn_for (COMPARE, TYPE_MODE (type)))
{
- do_jump (fold_convert (type, exp), if_false_label, if_true_label);
+ do_jump (fold_convert (type, exp), if_false_label, if_true_label,
+ prob);
break;
}
goto normal;
case LTGT_EXPR:
case TRUTH_ANDIF_EXPR:
case TRUTH_ORIF_EXPR:
+ other_code:
do_jump_1 (code, TREE_OPERAND (exp, 0), TREE_OPERAND (exp, 1),
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case BIT_AND_EXPR:
{
tree exp0 = TREE_OPERAND (exp, 0);
rtx set_label, clr_label;
+ int setclr_prob = prob;
/* Strip narrowing integral type conversions. */
while (CONVERT_EXPR_P (exp0)
exp0 = TREE_OPERAND (exp0, 0);
clr_label = if_true_label;
set_label = if_false_label;
+ setclr_prob = inv (prob);
}
else
{
= (unsigned HOST_WIDE_INT) 1 << TREE_INT_CST_LOW (shift);
do_jump (build2 (BIT_AND_EXPR, argtype, arg,
build_int_cst_wide_type (argtype, mask, 0)),
- clr_label, set_label);
+ clr_label, set_label, setclr_prob);
break;
}
}
&& TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp))
&& have_insn_for (COMPARE, TYPE_MODE (type)))
{
- do_jump (fold_convert (type, exp), if_false_label, if_true_label);
+ do_jump (fold_convert (type, exp), if_false_label, if_true_label,
+ prob);
break;
}
false) >= 4
|| TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 1)))
goto normal;
+ code = TRUTH_ANDIF_EXPR;
+ goto other_code;
case BIT_IOR_EXPR:
case TRUTH_OR_EXPR:
/* High branch cost, expand as the bitwise OR of the conditions.
Do the same if the RHS has side effects, because we're effectively
turning a TRUTH_OR_EXPR into a TRUTH_ORIF_EXPR. */
- if (BRANCH_COST (optimize_insn_for_speed_p (), false)>= 4
+ if (BRANCH_COST (optimize_insn_for_speed_p (), false) >= 4
|| TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 1)))
goto normal;
+ code = TRUTH_ORIF_EXPR;
+ goto other_code;
/* Fall through and generate the normal code. */
default:
do_compare_rtx_and_jump (temp, CONST0_RTX (GET_MODE (temp)),
NE, TYPE_UNSIGNED (TREE_TYPE (exp)),
GET_MODE (temp), NULL_RTX,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
}
if (drop_through_label)
static void
do_jump_by_parts_greater_rtx (enum machine_mode mode, int unsignedp, rtx op0,
- rtx op1, rtx if_false_label, rtx if_true_label)
+ rtx op1, rtx if_false_label, rtx if_true_label,
+ int prob)
{
int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD);
rtx drop_through_label = 0;
/* All but high-order word must be compared as unsigned. */
do_compare_rtx_and_jump (op0_word, op1_word, GT,
(unsignedp || i > 0), word_mode, NULL_RTX,
- NULL_RTX, if_true_label);
+ NULL_RTX, if_true_label, prob);
/* Consider lower words only if these are equal. */
do_compare_rtx_and_jump (op0_word, op1_word, NE, unsignedp, word_mode,
- NULL_RTX, NULL_RTX, if_false_label);
+ NULL_RTX, NULL_RTX, if_false_label,
+ inv (prob));
}
if (if_false_label)
static void
do_jump_by_parts_greater (tree treeop0, tree treeop1, int swap,
- rtx if_false_label, rtx if_true_label)
+ rtx if_false_label, rtx if_true_label, int prob)
{
rtx op0 = expand_normal (swap ? treeop1 : treeop0);
rtx op1 = expand_normal (swap ? treeop0 : treeop1);
int unsignedp = TYPE_UNSIGNED (TREE_TYPE (treeop0));
do_jump_by_parts_greater_rtx (mode, unsignedp, op0, op1, if_false_label,
- if_true_label);
+ if_true_label, prob);
}
\f
/* Jump according to whether OP0 is 0. We assume that OP0 has an integer
static void
do_jump_by_parts_zero_rtx (enum machine_mode mode, rtx op0,
- rtx if_false_label, rtx if_true_label)
+ rtx if_false_label, rtx if_true_label, int prob)
{
int nwords = GET_MODE_SIZE (mode) / UNITS_PER_WORD;
rtx part;
if (part != 0)
{
do_compare_rtx_and_jump (part, const0_rtx, EQ, 1, word_mode,
- NULL_RTX, if_false_label, if_true_label);
-
+ NULL_RTX, if_false_label, if_true_label, prob);
return;
}
for (i = 0; i < nwords; i++)
do_compare_rtx_and_jump (operand_subword_force (op0, i, mode),
const0_rtx, EQ, 1, word_mode, NULL_RTX,
- if_false_label, NULL_RTX);
+ if_false_label, NULL_RTX, prob);
if (if_true_label)
emit_jump (if_true_label);
static void
do_jump_by_parts_equality_rtx (enum machine_mode mode, rtx op0, rtx op1,
- rtx if_false_label, rtx if_true_label)
+ rtx if_false_label, rtx if_true_label, int prob)
{
int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD);
rtx drop_through_label = 0;
if (op1 == const0_rtx)
{
- do_jump_by_parts_zero_rtx (mode, op0, if_false_label, if_true_label);
+ do_jump_by_parts_zero_rtx (mode, op0, if_false_label, if_true_label,
+ prob);
return;
}
else if (op0 == const0_rtx)
{
- do_jump_by_parts_zero_rtx (mode, op1, if_false_label, if_true_label);
+ do_jump_by_parts_zero_rtx (mode, op1, if_false_label, if_true_label,
+ prob);
return;
}
do_compare_rtx_and_jump (operand_subword_force (op0, i, mode),
operand_subword_force (op1, i, mode),
EQ, 0, word_mode, NULL_RTX,
- if_false_label, NULL_RTX);
+ if_false_label, NULL_RTX, prob);
if (if_true_label)
emit_jump (if_true_label);
static void
do_jump_by_parts_equality (tree treeop0, tree treeop1, rtx if_false_label,
- rtx if_true_label)
+ rtx if_true_label, int prob)
{
rtx op0 = expand_normal (treeop0);
rtx op1 = expand_normal (treeop1);
enum machine_mode mode = TYPE_MODE (TREE_TYPE (treeop0));
do_jump_by_parts_equality_rtx (mode, op0, op1, if_false_label,
- if_true_label);
+ if_true_label, prob);
}
\f
/* Split a comparison into two others, the second of which has the other
void
do_compare_rtx_and_jump (rtx op0, rtx op1, enum rtx_code code, int unsignedp,
enum machine_mode mode, rtx size, rtx if_false_label,
- rtx if_true_label)
+ rtx if_true_label, int prob)
{
rtx tem;
rtx dummy_label = NULL_RTX;
+ rtx last;
/* Reverse the comparison if that is safe and we want to jump if it is
false. Also convert to the reverse comparison if the target can
if_true_label = if_false_label;
if_false_label = tem;
code = rcode;
+ prob = inv (prob);
}
}
{
case LTU:
do_jump_by_parts_greater_rtx (mode, 1, op1, op0,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case LEU:
do_jump_by_parts_greater_rtx (mode, 1, op0, op1,
- if_true_label, if_false_label);
+ if_true_label, if_false_label,
+ inv (prob));
break;
case GTU:
do_jump_by_parts_greater_rtx (mode, 1, op0, op1,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case GEU:
do_jump_by_parts_greater_rtx (mode, 1, op1, op0,
- if_true_label, if_false_label);
+ if_true_label, if_false_label,
+ inv (prob));
break;
case LT:
do_jump_by_parts_greater_rtx (mode, 0, op1, op0,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case LE:
do_jump_by_parts_greater_rtx (mode, 0, op0, op1,
- if_true_label, if_false_label);
+ if_true_label, if_false_label,
+ inv (prob));
break;
case GT:
do_jump_by_parts_greater_rtx (mode, 0, op0, op1,
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
break;
case GE:
do_jump_by_parts_greater_rtx (mode, 0, op1, op0,
- if_true_label, if_false_label);
+ if_true_label, if_false_label,
+ inv (prob));
break;
case EQ:
do_jump_by_parts_equality_rtx (mode, op0, op1, if_false_label,
- if_true_label);
+ if_true_label, prob);
break;
case NE:
do_jump_by_parts_equality_rtx (mode, op0, op1, if_true_label,
- if_false_label);
+ if_false_label, inv (prob));
break;
default:
else
dest_label = if_false_label;
do_compare_rtx_and_jump (op0, op1, first_code, unsignedp, mode,
- size, dest_label, NULL_RTX);
+ size, dest_label, NULL_RTX, prob);
}
else
do_compare_rtx_and_jump (op0, op1, first_code, unsignedp, mode,
- size, NULL_RTX, if_true_label);
+ size, NULL_RTX, if_true_label, prob);
}
}
+ last = get_last_insn ();
emit_cmp_and_jump_insns (op0, op1, code, size, mode, unsignedp,
if_true_label);
+ if (prob != -1 && profile_status != PROFILE_ABSENT)
+ {
+ for (last = NEXT_INSN (last);
+ last && NEXT_INSN (last);
+ last = NEXT_INSN (last))
+ if (JUMP_P (last))
+ break;
+ if (!last
+ || !JUMP_P (last)
+ || NEXT_INSN (last)
+ || !any_condjump_p (last))
+ {
+ if (dump_file)
+ fprintf (dump_file, "Failed to add probability note\n");
+ }
+ else
+ {
+ gcc_assert (!find_reg_note (last, REG_BR_PROB, 0));
+ add_reg_note (last, REG_BR_PROB, GEN_INT (prob));
+ }
+ }
}
if (if_false_label)
static void
do_compare_and_jump (tree treeop0, tree treeop1, enum rtx_code signed_code,
enum rtx_code unsigned_code, rtx if_false_label,
- rtx if_true_label)
+ rtx if_true_label, int prob)
{
rtx op0, op1;
tree type;
do_compare_rtx_and_jump (op0, op1, code, unsignedp, mode,
((mode == BLKmode)
? expr_size (treeop0) : NULL_RTX),
- if_false_label, if_true_label);
+ if_false_label, if_true_label, prob);
}
#include "gt-dojump.h"
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