[Bug target/125217] New: RISC-V: missing sspopchk when zicfiss + zcmp is enabled

[michiel at derhaeg dot be via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125217

            Bug ID: 125217
           Summary: RISC-V: missing sspopchk when zicfiss + zcmp is
                    enabled
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: michiel at derhaeg dot be
  Target Milestone: ---

Example: https://godbolt.org/z/nTPhj5Y8Y

int printf(const char *,...);
int printSomething(int arr[], int len) {
  for (int i = 0; i < len; i++)
    printf("Val[%d]: %d\n", i, arr[i]);
  return len;
}

emits

.LC0:
        .string "Val[%d]: %d\n"
printSomething:
        sspush  ra
        cm.push {ra, s0-s1}, -32
        cm.mvsa01       s1,s0
        li      a1,0
.L2:
        blt     a1,s0,.L3
        mv      a0,s0
        cm.popret       {ra, s0-s1}, 32
.L3:
        slli    a5,a1,2
        add     a5,s1,a5
        lw      a2,0(a5)
        lla     a0,.LC0
        sw      a1,12(sp)
        call    printf@plt
        lw      a1,12(sp)
        addi    a1,a1,1
        j       .L2

Looks like a easy fix in riscv_expand_epilogue.
Already made a fix, will submit it soon.