On 6/26/25 8:53 AM, Paul-Antoine Arras wrote:
This pattern enables the combine pass (or late-combine, depending on the case)
to merge a vec_duplicate into a (possibly negated) minus-mult RTL instruction.
Before this patch, we have two instructions, e.g.:
vfmv.v.f v6,fa0
vfnmacc.vv v2,v6,v4
After, we get only one:
vfnmacc.vf v2,fa0,v4
PR target/119100
gcc/ChangeLog:
* config/riscv/autovec-opt.md (*vfnmsub_<mode>,*vfnmadd_<mode>): Handle
both add and acc variants.
* config/riscv/vector.md (*pred_mul_neg_<optab><mode>_scalar_undef): New
pattern.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f16.c: Add vfnmacc and
vfnmsac.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f32.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f64.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f16.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f32.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f64.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f16.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f32.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f64.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f16.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f32.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f64.c: Likewise.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_mulop.h (DEF_VF_MULOP_CASE_1):
Fix return type.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfnmacc-run-1-f16.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfnmacc-run-1-f32.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfnmacc-run-1-f64.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfnmsac-run-1-f16.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfnmsac-run-1-f32.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfnmsac-run-1-f64.c: New test.
This is failing pre-commit testing:
linux rv64gcv lp64d medlow multilib:
FAIL: gcc.target/riscv/rvv/base/bug-4.c (internal compiler error: in
extract_insn, at recog.cc:2882)
FAIL: gcc.target/riscv/rvv/base/bug-4.c (test for excess errors)
linux rv32gcv ilp32d medlow multilib:
FAIL: gcc.target/riscv/rvv/base/bug-4.c (internal compiler error: in
extract_insn, at recog.cc:2882)
FAIL: gcc.target/riscv/rvv/base/bug-4.c (test for excess errors)
newlib rv64gcv lp64d medlow multilib:
FAIL: gcc.target/riscv/rvv/base/bug-4.c (internal compiler error: in
extract_insn, at recog.cc:2882)
FAIL: gcc.target/riscv/rvv/base/bug-4.c (test for excess errors)
