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ifcvt.c (total_bb_rtx_cost): New function.

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* ifcvt.c (total_bb_rtx_cost): New function.
        (find_if_case_1): Compare rtx_cost of basic block to cost of
        BRANCH_COST insns.
        (find_if_case_2): Same.

From-SVN: r84233
This commit is contained in:
David Edelsohn 2004-07-07 21:35:44 +00:00 committed by David Edelsohn
parent 951661a1a5
commit 252910550c
2 changed files with 31 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2004-07-07 David Edelsohn <edelsohn@gnu.org>
* ifcvt.c (total_bb_rtx_cost): New function.
(find_if_case_1): Compare rtx_cost of basic block to cost of
BRANCH_COST insns.
(find_if_case_2): Same.
2004-07-07 Eric Botcazou <ebotcazou@libertysurf.fr>
PR target/10567

26
gcc/ifcvt.c
View File

@ -86,6 +86,7 @@ static bool life_data_ok;
/* Forward references. */
static int count_bb_insns (basic_block);
static int total_bb_rtx_cost (basic_block);
static rtx first_active_insn (basic_block);
static rtx last_active_insn (basic_block, int);
static basic_block block_fallthru (basic_block);
@ -160,6 +161,27 @@ count_bb_insns (basic_block bb)
return count;
}
/* Count the total rtx_cost of non-jump active insns in BB. */
static int
total_bb_rtx_cost (basic_block bb)
{
int count = 0;
rtx insn = BB_HEAD (bb);
while (1)
{
if (GET_CODE (insn) == CALL_INSN || GET_CODE (insn) == INSN)
count += rtx_cost (PATTERN (insn), 0);
if (insn == BB_END (bb))
break;
insn = NEXT_INSN (insn);
}
return count;
}
/* Return the first non-jump active insn in the basic block. */
static rtx
@ -2883,7 +2905,7 @@ find_if_case_1 (basic_block test_bb, edge then_edge, edge else_edge)
test_bb->index, then_bb->index);
/* THEN is small. */
if (count_bb_insns (then_bb) > BRANCH_COST)
if (total_bb_rtx_cost (then_bb) >= COSTS_N_INSNS (BRANCH_COST))
return FALSE;
/* Registers set are dead, or are predicable. */
@ -2974,7 +2996,7 @@ find_if_case_2 (basic_block test_bb, edge then_edge, edge else_edge)
test_bb->index, else_bb->index);
/* ELSE is small. */
if (count_bb_insns (else_bb) > BRANCH_COST)
if (total_bb_rtx_cost (else_bb) >= COSTS_N_INSNS (BRANCH_COST))
return FALSE;
/* Registers set are dead, or are predicable. */