Add a combine pattern for parity detection.
Ok for master?
Johann
AVR: target/114975 - Add combine-pattern for __parityqi2.
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.diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md
index 97f42be7729..d4fcff46123 100644
--- a/gcc/config/avr/avr.md
+++ b/gcc/config/avr/avr.md
@@ -8418,7 +8418,22 @@ (define_insn_and_split "*parityhi2"
(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))]
diff --git a/gcc/testsuite/gcc.target/avr/pr114975-parity.c b/gcc/testsuite/gcc.target/avr/pr114975-parity.c
new file mode 100644
index 000..767ced0a464
--- /dev/null
+++ b/gcc/testsuite/gcc.target/avr/pr114975-parity.c
@@ -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 } } */
