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| author | Georg-Johann Lay <avr@gjlay.de> | 2024-05-07 19:39:55 +0200 |
|---|---|---|
| committer | Georg-Johann Lay <avr@gjlay.de> | 2024-05-08 10:40:41 +0200 |
| commit | c8f4bbb824fafecf021a802324cd79e64b03b947 (patch) | |
| tree | 5b88099000c333f5900942998025d384f293b3e4 | |
| parent | 245a6d478aba6499d1f649e4d35df1e858c5967c (diff) | |
| download | gcc-c8f4bbb824fafecf021a802324cd79e64b03b947.zip gcc-c8f4bbb824fafecf021a802324cd79e64b03b947.tar.gz gcc-c8f4bbb824fafecf021a802324cd79e64b03b947.tar.bz2 | |
AVR: target/114975 - Add combine-pattern for __popcountqi2.
PR target/114975
gcc/
* config/avr/avr.md: Add combine pattern for
8-bit popcount detection.
gcc/testsuite/
* gcc.target/avr/pr114975-popcount.c: New test.
| -rw-r--r-- | gcc/config/avr/avr.md | 13 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/avr/pr114975-popcount.c | 17 |
2 files changed, 30 insertions, 0 deletions
diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md index 97f42be..36fe384 100644 --- a/gcc/config/avr/avr.md +++ b/gcc/config/avr/avr.md @@ -8527,6 +8527,19 @@ operands[2] = gen_reg_rtx (HImode); }) +(define_insn_and_split "*popcounthi2.split8" + [(set (reg:HI 24) + (zero_extend:HI (popcount:QI (match_operand:QI 0 "register_operand"))))] + "! reload_completed" + { gcc_unreachable(); } + "&& 1" + [(set (reg:QI 24) + (match_dup 0)) + (set (reg:QI 24) + (popcount:QI (reg:QI 24))) + (set (reg:QI 25) + (const_int 0))]) + (define_insn_and_split "*popcounthi2.libgcc_split" [(set (reg:HI 24) (popcount:HI (reg:HI 24)))] diff --git a/gcc/testsuite/gcc.target/avr/pr114975-popcount.c b/gcc/testsuite/gcc.target/avr/pr114975-popcount.c new file mode 100644 index 0000000..87eb56b --- /dev/null +++ b/gcc/testsuite/gcc.target/avr/pr114975-popcount.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-Os" } */ + +typedef __UINT8_TYPE__ uint8_t; + +uint8_t use_pop1 (int y, uint8_t x) +{ + return 1 + __builtin_popcount (x); +} + +uint8_t use_pop2 (uint8_t x) +{ + x += 1; + return 1 - __builtin_popcount (x); +} + +/* { dg-final { scan-assembler-times "__popcountqi2" 2 } } */ |