From 9c1ed63e4c6b0f80dd47ce421dd7d80d52c38fd3 Mon Sep 17 00:00:00 2001 From: Alexey Merzlyakov Date: Wed, 2 Jul 2025 11:29:00 -0600 Subject: [PATCH] [PATCH] [RISC-V] Fix shift type for RVV interleaved stepped patterns [PR120356] It corrects the shift type of interleaved stepped patterns for const vector expanding in LRA. The shift instruction was initially LSHIFTRT, and it seems still should be the same type for both LRA and other cases. PR target/120356 gcc/ChangeLog: * config/riscv/riscv-v.cc (expand_const_vector_interleaved_stepped_npatterns): Fix ASHIFT to LSHIFTRT insn. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/autovec/pr120356.c: New test. --- gcc/config/riscv/riscv-v.cc | 2 +- .../gcc.target/riscv/rvv/autovec/pr120356.c | 26 +++++++++++++++++++ 2 files changed, 27 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc index 69f2a1ece53..ce1633c72de 100644 --- a/gcc/config/riscv/riscv-v.cc +++ b/gcc/config/riscv/riscv-v.cc @@ -1598,7 +1598,7 @@ expand_const_vector_interleaved_stepped_npatterns (rtx target, rtx src, shifted_vid = gen_reg_rtx (mode); rtx shift = gen_int_mode (1, Xmode); rtx shift_ops[] = {shifted_vid, vid, shift}; - emit_vlmax_insn (code_for_pred_scalar (ASHIFT, mode), BINARY_OP, + emit_vlmax_insn (code_for_pred_scalar (LSHIFTRT, mode), BINARY_OP, shift_ops); } else diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c new file mode 100644 index 00000000000..2913f04e4c8 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c @@ -0,0 +1,26 @@ +/* { dg-do run } */ +/* { dg-require-effective-target rvv_zvl256b_ok } */ +/* { dg-options "-march=rv64gcv_zvl256b -mabi=lp64d -mrvv-vector-bits=zvl -O2" } */ + +unsigned char a = 5; +long long c[18]; + +static void d () +{ + for (short i = 0; i < 60; i += 65413) + for (char j = 0; j < 18; j++) + { + for (char k = 0; k < 18; k++) + a *= 143; + for (char k = 0; k < 6; k++) + for (char l = 0; l < 18; l++) + c[l] = 0; + } +} + +int main () +{ + d (); + if (a + c[0] != 69) + __builtin_abort (); +} -- 2.47.2