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aarch64.c (doloop_end): New pattern.

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* config/aarch64/aarch64.c (doloop_end): New pattern.
       * config/aarch64/aarch64.md (TARGET_CAN_USE_DOLOOP_P): Implement.

From-SVN: r217717
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Felix Yang 2014-11-18 14:45:09 +00:00 committed by Fei Yang
parent ef768ba353
commit 594bdd53d8
3 changed files with 45 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-11-18 Felix Yang <felix.yang@huawei.com>
* config/aarch64/aarch64.c (doloop_end): New pattern.
* config/aarch64/aarch64.md (TARGET_CAN_USE_DOLOOP_P): Implement.
2014-11-18 Jason Merrill <jason@redhat.com>
* tree.c (warn_deprecated_use): Show declaration with inform.

3
gcc/config/aarch64/aarch64.c
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@ -10605,6 +10605,9 @@ aarch64_gen_ccmp_next (rtx prev, int cmp_code, rtx op0, rtx op1, int bit_code)
#define TARGET_USE_BY_PIECES_INFRASTRUCTURE_P \
aarch64_use_by_pieces_infrastructure_p
#undef TARGET_CAN_USE_DOLOOP_P
#define TARGET_CAN_USE_DOLOOP_P can_use_doloop_if_innermost
struct gcc_target targetm = TARGET_INITIALIZER;
#include "gt-aarch64.h"

37
gcc/config/aarch64/aarch64.md
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@ -4169,6 +4169,43 @@
[(set_attr "type" "mrs")])
;; Define the subtract-one-and-jump insns so loop.c
;; knows what to generate.
(define_expand "doloop_end"
[(use (match_operand 0 "" "")) ; loop pseudo
(use (match_operand 1 "" ""))] ; label
"optimize > 0 && flag_modulo_sched"
{
rtx s0;
rtx bcomp;
rtx loc_ref;
rtx cc_reg;
rtx insn;
rtx cmp;
/* Currently SMS relies on the do-loop pattern to recognize loops
where (1) the control part consists of all insns defining and/or
using a certain 'count' register and (2) the loop count can be
adjusted by modifying this register prior to the loop.
??? The possible introduction of a new block to initialize the
new IV can potentially affect branch optimizations. */
if (GET_MODE (operands[0]) != DImode)
FAIL;
s0 = operands [0];
insn = emit_insn (gen_adddi3_compare0 (s0, s0, GEN_INT (-1)));
cmp = XVECEXP (PATTERN (insn), 0, 0);
cc_reg = SET_DEST (cmp);
bcomp = gen_rtx_NE (VOIDmode, cc_reg, const0_rtx);
loc_ref = gen_rtx_LABEL_REF (VOIDmode, operands [1]);
emit_jump_insn (gen_rtx_SET (VOIDmode, pc_rtx,
gen_rtx_IF_THEN_ELSE (VOIDmode, bcomp,
loc_ref, pc_rtx)));
DONE;
})
;; AdvSIMD Stuff
(include "aarch64-simd.md")