[Bug tree-optimization/113281] [14 Regression] Wrong code due to vectorization of shift reduction and missing promotions

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113281

--- Comment #11 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Pan Li <pa...@gcc.gnu.org>:

https://gcc.gnu.org/g:0acb63670bf1058fce00a75bd318c40be3bfa222

commit r14-7183-g0acb63670bf1058fce00a75bd318c40be3bfa222
Author: Juzhe-Zhong <juzhe.zh...@rivai.ai>
Date:   Fri Jan 12 17:28:44 2024 +0800

    RISC-V: Adjust scalar_to_vec cost

    1. Introduce vector regmove new tune info.
    2. Adjust scalar_to_vec cost in add_stmt_cost.

    We will get optimal codegen after this patch with -march=rv64gcv_zvl256b:

            lui     a5,%hi(a)
            li      a4,19
            sb      a4,%lo(a)(a5)
            li      a0,0
            ret

    Tested on both RV32/RV64 no regression, Ok for trunk ?

            PR target/113281

    gcc/ChangeLog:

            * config/riscv/riscv-protos.h (struct regmove_vector_cost): New
struct.
            (struct cpu_vector_cost): Add regmove struct.
            (get_vector_costs): Export as global.
            * config/riscv/riscv-vector-costs.cc (adjust_stmt_cost): Adjust
scalar_to_vec cost.
            (costs::add_stmt_cost): Ditto.
            * config/riscv/riscv.cc (get_common_costs): Export global function.

    gcc/testsuite/ChangeLog:

            * gcc.target/riscv/rvv/autovec/pr113209.c: Adapt test.
            * gcc.dg/vect/costmodel/riscv/rvv/pr113281-1.c: New test.
            * gcc.dg/vect/costmodel/riscv/rvv/pr113281-2.c: New test.