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AVR: target/114975 - Add combine-pattern for __parityqi2.

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PR target/114975
gcc/
	* config/avr/avr.md: Add combine pattern for
	8-bit parity detection.

gcc/testsuite/
	* gcc.target/avr/pr114975-parity.c: New test.
This commit is contained in:
Georg-Johann Lay 2024-05-07 19:42:30 +02:00
parent c8f4bbb824
commit 41bc359c32
2 changed files with 33 additions and 1 deletions
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17
gcc/config/avr/avr.md
View File

@ -8418,7 +8418,22 @@
(set (match_dup 0)
(reg:HI 24))])
(define_insn_and_split "*parityqihi2"
(define_insn_and_split "*parityqihi2.1"
[(set (match_operand:HI 0 "register_operand" "=r")
(zero_extend:HI
(parity:QI (match_operand:QI 1 "register_operand" "r"))))
(clobber (reg:HI 24))]
"!reload_completed"
{ gcc_unreachable(); }
"&& 1"
[(set (reg:QI 24)
(match_dup 1))
(set (reg:HI 24)
(zero_extend:HI (parity:QI (reg:QI 24))))
(set (match_dup 0)
(reg:HI 24))])
(define_insn_and_split "*parityqihi2.2"
[(set (match_operand:HI 0 "register_operand" "=r")
(parity:HI (match_operand:QI 1 "register_operand" "r")))
(clobber (reg:HI 24))]

17
gcc/testsuite/gcc.target/avr/pr114975-parity.c Normal file
View File

@ -0,0 +1,17 @@
/* { dg-do compile } */
/* { dg-additional-options "-Os" } */
typedef __UINT8_TYPE__ uint8_t;
uint8_t use_pary1 (int y, uint8_t x)
{
return 1 + __builtin_parity (x);
}
uint8_t use_pary2 (uint8_t x)
{
x += 1;
return 1 - __builtin_parity (x);
}
/* { dg-final { scan-assembler-times "__parityqi2" 2 } } */