[Bug c/110696] New: RISC-V: -march doesn't imply correctly

[juzhe.zhong at rivai dot ai via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110696

            Bug ID: 110696
           Summary: RISC-V: -march doesn't imply correctly
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: juzhe.zhong at rivai dot ai
  Target Milestone: ---

test:
#include "riscv_vector.h"
void foo () {vint32m1_t v;}

1. -march=rv64gcv_zvl4096:

.attribute arch,
"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl1024b1p0_zvl128b1p0_zvl2048b1p0_zvl32b1p0_zvl4096b1p0_zvl64b1p0"

Missing: zvl256b and zvl512b



2. -march=rv64gcv_zvl8192:

.attribute arch,
"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl2048b1p0_zvl32b1p0_zvl4096b1p0_zvl64b1p0_zvl8192b1p0"

Missing: zvl256b and zvl512b and zvl1024b