Compiler output from qcc

funcs.c

long func1(long x, long y)
{
    long a, b, c;
    a = x + y;
    b = y - x;
    a = a + 2;
    a = a * b;
    b = b + 2;
    b = b * a;
    c = a + b;
    return c;
}

long func2(long x, long y)
{
    long a, b;
    a = x + y;
    b = y - x;
    a = a + 2;
    a = a * b;
    b = b + 2;
    b = b * a;
    return a + b;
}

funcs.s

func1:
  call	t0,__riscv_save_4
  addi	fp,sp,-48
  add	s1,a0,a1
  sub	s2,a1,a0
  addi	s1,s1,2
  mul	s1,s1,s2
  addi	s2,s2,2
  mul	s2,s2,s1
  add	s3,s1,s2
  mv	a0,s3
  tail	__riscv_restore_4

func2:
  call	t0,__riscv_save_3
  addi	fp,sp,-32
  add	s1,a0,a1
  sub	s2,a1,a0
  addi	s1,s1,2
  mul	s1,s1,s2
  addi	s2,s2,2
  mul	s2,s2,s1
  add	a0,s1,s2
  tail	__riscv_restore_3