[Bug target/128162] [17 Regression] wrong code at -O2: vwmacc.vx whose source is the upper half of the accumulator raises SIGILL

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128162

--- Comment #16 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:c0e167041b054400959aa8b3923df76934197fec

commit r17-5791-gc0e167041b054400959aa8b3923df76934197fec
Author: Pan Li <pan2...@intel.com>
Date:   Fri Oct 30 16:20:05 2026 +0800

    RISC-V: Add tests for no reg overlap of fp widen ternary [PR target/128162]

    Add test cases for the register group overlap of the floating-point
    widening ternary insns, to ensure the vs1 and vs2 will not fall inside
    the vd register group, as the vd is also read as the accumulator with
    a wider EEW.  The test cases ask for the overlap by taking a piece of
    the vd register group as the vs1 or vs2, and cover below insns.

      vfwmacc.vv, vfwmsac.vv, vfwnmacc.vv, vfwnmsac.vv
      vfwmacc.vf, vfwmsac.vf, vfwnmacc.vf, vfwnmsac.vf
      vfwmaccbf16.vv, vfwmaccbf16.vf

            PR target/128162

    gcc/testsuite/ChangeLog:

            *
gcc.target/riscv/rvv/autovec/group_overlap/vfwmaccbf16_vf-bf16-m1.c: New test.
            *
gcc.target/riscv/rvv/autovec/group_overlap/vfwmaccbf16_vf-bf16-m2.c: New test.
            *
gcc.target/riscv/rvv/autovec/group_overlap/vfwmaccbf16_vf-bf16-m4.c: New test.
            *
gcc.target/riscv/rvv/autovec/group_overlap/vfwmaccbf16_vv-bf16-m1.c: New test.
            *
gcc.target/riscv/rvv/autovec/group_overlap/vfwmaccbf16_vv-bf16-m2.c: New test.
            *
gcc.target/riscv/rvv/autovec/group_overlap/vfwmaccbf16_vv-bf16-m4.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vf-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vf-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vf-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vf-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vf-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vf-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vv-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vv-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vv-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vv-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vv-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmacc_vv-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vf-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vf-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vf-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vf-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vf-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vf-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vv-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vv-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vv-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vv-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vv-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwmsac_vv-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vf-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vf-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vf-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vf-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vf-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vf-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vv-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vv-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vv-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vv-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vv-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmacc_vv-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vf-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vf-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vf-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vf-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vf-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vf-f32-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vv-f16-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vv-f16-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vv-f16-m4.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vv-f32-m1.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vv-f32-m2.c:
New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vfwnmsac_vv-f32-m4.c:
New test.

    Signed-off-by: Pan Li <pan2...@intel.com>