gcc/testsuite/gcc.target/riscv/shift-shift-2.c

/* { dg-do compile } */
/* { dg-options "-march=rv64gc -mabi=lp64" } */
/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" } } */

/* Test for lshrsi3_zero_extend_3+1 pattern that uses p2m1_shift_operand.  */
unsigned int
sub1 (unsigned int i)
{
  return (i << 1) >> 1;
}

unsigned int
sub2 (unsigned int i)
{
  return (i << 20) >> 20;
}

unsigned long
sub3 (unsigned long i)
{
  return (i << 1) >> 1;
}

unsigned long
sub4 (unsigned long i)
{
  return (i << 52) >> 52;
}

unsigned int
sub5 (unsigned int i)
{
  unsigned int j;
  j = i >> 24;
  j = j * (1 << 24);
  j = i - j;
  return j;
}
/* { dg-final { scan-assembler-times {\mslli} 5 } } */
/* { dg-final { scan-assembler-times {\msrli} 5 } } */
/* { dg-final { scan-assembler-times ",40" 2 } } */ /* For sub5 test */
/* { dg-final { scan-assembler-not {\mslliw} } } */
/* { dg-final { scan-assembler-not {\msrliw} } } */