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Use maybe_expand_insn in maybe_emit_atomic_test_and_set.

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* optabs.c (gen_atomic_test_and_set): Remove default.
        (maybe_emit_atomic_test_and_set): Use maybe_expand_insn.

From-SVN: r183580
This commit is contained in:
Richard Henderson 2012-01-26 13:17:27 -08:00 committed by Richard Henderson
parent 13b6172204
commit 15e73e0657
2 changed files with 15 additions and 15 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-01-27 Richard Henderson <rth@redhat.com>
* optabs.c (gen_atomic_test_and_set): Remove default.
(maybe_emit_atomic_test_and_set): Use maybe_expand_insn.
2012-01-26 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/51978

25
gcc/optabs.c
View File

@ -7311,39 +7311,34 @@ maybe_emit_compare_and_swap_exchange_loop (rtx target, rtx mem, rtx val)
#ifndef HAVE_atomic_test_and_set
#define HAVE_atomic_test_and_set 0
#define CODE_FOR_atomic_test_and_set CODE_FOR_nothing
#define gen_atomic_test_and_set(x,y,z) \
(gcc_unreachable (), (void) (0 && (x) && (y) && (z)), NULL_RTX)
#endif
static rtx
maybe_emit_atomic_test_and_set (rtx target, rtx mem, enum memmodel model)
{
enum machine_mode pat_bool_mode;
const struct insn_data_d *id;
struct expand_operand ops[3];
if (!HAVE_atomic_test_and_set)
return NULL_RTX;
id = &insn_data[CODE_FOR_atomic_test_and_set];
pat_bool_mode = id->operand[0].mode;
/* ??? We only support test-and-set on single bytes at the moment.
We'd have to change the builtin to allow wider memories. */
gcc_checking_assert (id->operand[1].mode == QImode);
/* While we always get QImode from __atomic_test_and_set, we get
other memory modes from __sync_lock_test_and_set. Note that we
use no endian adjustment here. This matches the 4.6 behavior
in the Sparc backend. */
gcc_checking_assert
(insn_data[CODE_FOR_atomic_test_and_set].operand[1].mode == QImode);
if (GET_MODE (mem) != QImode)
mem = adjust_address_nv (mem, QImode, 0);
if (target == NULL || GET_MODE (target) != pat_bool_mode)
target = gen_reg_rtx (pat_bool_mode);
pat_bool_mode = insn_data[CODE_FOR_atomic_test_and_set].operand[0].mode;
create_output_operand (&ops[0], target, pat_bool_mode);
create_fixed_operand (&ops[1], mem);
create_integer_operand (&ops[2], model);
emit_insn (gen_atomic_test_and_set (target, mem, GEN_INT (model)));
return target;
if (maybe_expand_insn (CODE_FOR_atomic_test_and_set, 3, ops))
return ops[0].value;
return NULL_RTX;
}
/* This function expands the legacy _sync_lock test_and_set operation which is