diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/riscv/riscv-v.cc | 25 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/riscv/rvv/autovec/pr114028.c | 25 |
2 files changed, 49 insertions, 1 deletions
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc index 0cfbd21..29d58de 100644 --- a/gcc/config/riscv/riscv-v.cc +++ b/gcc/config/riscv/riscv-v.cc @@ -443,6 +443,7 @@ public: } bool can_duplicate_repeating_sequence_p (); + bool is_repeating_sequence (); rtx get_merged_repeating_sequence (); bool repeating_sequence_use_merge_profitable_p (); @@ -483,7 +484,8 @@ rvv_builder::can_duplicate_repeating_sequence_p () { poly_uint64 new_size = exact_div (full_nelts (), npatterns ()); unsigned int new_inner_size = m_inner_bits_size * npatterns (); - if (!int_mode_for_size (new_inner_size, 0).exists (&m_new_inner_mode) + if (m_inner_mode == Pmode + || !int_mode_for_size (new_inner_size, 0).exists (&m_new_inner_mode) || GET_MODE_SIZE (m_new_inner_mode) > UNITS_PER_WORD || !get_vector_mode (m_new_inner_mode, new_size).exists (&m_new_mode)) return false; @@ -492,6 +494,18 @@ rvv_builder::can_duplicate_repeating_sequence_p () return nelts_per_pattern () == 1; } +/* Return true if the vector is a simple sequence with one pattern and all + elements the same. */ +bool +rvv_builder::is_repeating_sequence () +{ + if (npatterns () > 1) + return false; + if (full_nelts ().is_constant ()) + return repeating_sequence_p (0, full_nelts ().to_constant (), 1); + return nelts_per_pattern () == 1; +} + /* Return true if it is a repeating sequence that using merge approach has better codegen than using default approach (slide1down). @@ -2544,6 +2558,15 @@ expand_vec_init (rtx target, rtx vals) v.quick_push (XVECEXP (vals, 0, i)); v.finalize (); + /* If the sequence is v = { a, a, a, a } just broadcast an element. */ + if (v.is_repeating_sequence ()) + { + machine_mode mode = GET_MODE (target); + rtx dup = expand_vector_broadcast (mode, v.elt (0)); + emit_move_insn (target, dup); + return; + } + if (nelts > 3) { /* Case 1: Convert v = { a, b, a, b } into v = { ab, ab }. */ diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr114028.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr114028.c new file mode 100644 index 0000000..e41f272 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr114028.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-march=rv64gcv_zvl256b -mabi=lp64d -O3" } */ + +int a, d = 55003; +long c = 0, h; +long e = 1; +short i; + +int +main () +{ + for (int g = 0; g < 16; g++) + { + d |= c; + short l = d; + i = l < 0 || a >> 4 ? d : a; + h = i - 8L; + e &= h; + } + + if (e != 1) + __builtin_abort (); +} + +/* { dg-final { scan-assembler-not "vmv\.v\.i\tv\[0-9\],0" } } */ |