Re: [PATCH] RISC-V: Fix ICE of RVV compare intrinsic

[Kito Cheng <kito.cheng@gmail.com>]

committed as https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=6f6eba35b9f06d35ff7bea81969fe905a5584bdc

On Fri, Mar 10, 2023 at 4:09 PM <juzhe.zhong@rivai.ai> wrote:
>
> From: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
>
> vfrsub_vf_m.cpp: In function 'int main()':
> vfrsub_vf_m.cpp:5:43: error: invalid argument to built-in function
>    5 |   vbool32_t d = __riscv_vmflt_vf_f32m1_b32(c, b, 8);
>      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
> during RTL pass: expand
> vfrsub_vf_m.cpp:5:43: internal compiler error: Segmentation fault
> 0x19f1b89 crash_signal
>        ../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/toplev.cc:314
> 0x1472e2f store_expr(tree_node*, rtx_def*, int, bool, bool)
>        ../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/expr.cc:6348
>
> gcc/ChangeLog:
>
>         * config/riscv/riscv-vector-builtins.cc (function_expander::use_compare_insn): Add operand predicate check.
>
> gcc/testsuite/ChangeLog:
>
>         * gcc.target/riscv/rvv/base/bug-1.c: New test.
>
> ---
>  gcc/config/riscv/riscv-vector-builtins.cc     |  9 +++
>  .../gcc.target/riscv/rvv/base/bug-1.c         | 79 +++++++++++++++++++
>  2 files changed, 88 insertions(+)
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/bug-1.c
>
> diff --git a/gcc/config/riscv/riscv-vector-builtins.cc b/gcc/config/riscv/riscv-vector-builtins.cc
> index fcda3863576..75e65091db3 100644
> --- a/gcc/config/riscv/riscv-vector-builtins.cc
> +++ b/gcc/config/riscv/riscv-vector-builtins.cc
> @@ -3084,6 +3084,15 @@ function_expander::use_compare_insn (rtx_code rcode, insn_code icode)
>
>    rtx op1 = expand_normal (CALL_EXPR_ARG (exp, arg_offset++));
>    rtx op2 = expand_normal (CALL_EXPR_ARG (exp, arg_offset++));
> +  if (!insn_operand_matches (icode, opno + 1, op1))
> +    op1 = force_reg (mode, op1);
> +  if (!insn_operand_matches (icode, opno + 2, op2))
> +    {
> +      if (VECTOR_MODE_P (GET_MODE (op2)))
> +       op2 = force_reg (mode, op2);
> +      else
> +       op2 = force_reg (GET_MODE_INNER (mode), op2);
> +    }
>    rtx comparison = gen_rtx_fmt_ee (rcode, mask_mode, op1, op2);
>    if (!VECTOR_MODE_P (GET_MODE (op2)))
>      comparison = gen_rtx_fmt_ee (rcode, mask_mode, op1,
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/bug-1.c b/gcc/testsuite/gcc.target/riscv/rvv/base/bug-1.c
> new file mode 100644
> index 00000000000..a8843674e31
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/bug-1.c
> @@ -0,0 +1,79 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv32gcv -mabi=ilp32d -O0" } */
> +
> +#include "riscv_vector.h"
> +
> +int
> +f0 ()
> +{
> +  float b;
> +  vfloat32m1_t c;
> +  vbool32_t d = __riscv_vmflt_vf_f32m1_b32 (c, b, 8);
> +  return 0;
> +}
> +
> +int
> +f1 ()
> +{
> +  vfloat32m1_t c;
> +  vbool32_t d = __riscv_vmflt_vf_f32m1_b32 (c, 0, 8);
> +  return 0;
> +}
> +
> +int
> +f2 ()
> +{
> +  vfloat32m1_t c;
> +  vbool32_t d = __riscv_vmflt_vf_f32m1_b32 (c, 55.55, 8);
> +  return 0;
> +}
> +
> +int
> +f3 ()
> +{
> +  int32_t b;
> +  vint32m1_t c;
> +  vbool32_t d = __riscv_vmseq_vx_i32m1_b32 (c, b, 8);
> +  return 0;
> +}
> +
> +int
> +f4 ()
> +{
> +  vint32m1_t c;
> +  vbool32_t d = __riscv_vmseq_vx_i32m1_b32 (c, 11, 8);
> +  return 0;
> +}
> +
> +int
> +f5 ()
> +{
> +  int64_t b;
> +  vint64m1_t c;
> +  vbool64_t d = __riscv_vmseq_vx_i64m1_b64 (c, b, 8);
> +  return 0;
> +}
> +
> +int
> +f6 ()
> +{
> +  vint64m1_t c;
> +  vbool64_t d = __riscv_vmseq_vx_i64m1_b64 (c, 11, 8);
> +  return 0;
> +}
> +
> +int
> +f7 ()
> +{
> +  vint64m1_t c;
> +  vbool64_t d = __riscv_vmseq_vx_i64m1_b64 (c, 0xAAAA, 8);
> +  return 0;
> +}
> +
> +int
> +f8 ()
> +{
> +  vint64m1_t c;
> +  vbool64_t d = __riscv_vmseq_vx_i64m1_b64 (c, 0xAAAAAAAAAAAAAA, 8);
> +  return 0;
> +}
> --
> 2.36.3
>