text: # Test 64-bit BRANCH RELATIVE ON COUNT in cases where some branches are out
  # of range.
  # RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s
  
  # Construct:
  #
  # loopN:
  #   load of countN
  #   ...
  # loop0:
  #   0xffd8 bytes, from MVIY instructions
  #   conditional branch to main
  # after0:
  #   ...
  #   decrement of countN
  #   conditional branch to loopN
  # afterN:
  #
  # Each load occupies 6 bytes.  Each decrement and branch occupies 4
  # bytes if BRCTG can be used, otherwise it occupies 10 bytes (AGHI + BRCL).
  # This means that loop 5 contains 4 * 6 + 0xffd8 + 4 * 4 == 0x10000 bytes
  # and is therefore (just) in range.  Loop 6 is out of range.
  #
  # CHECK: brctg {{%r[0-9]+}}
  # CHECK: brctg {{%r[0-9]+}}
  # CHECK: brctg {{%r[0-9]+}}
  # CHECK: brctg {{%r[0-9]+}}
  # CHECK: brctg {{%r[0-9]+}}
  # CHECK: aghi {{%r[0-9]+}}, -1
  # CHECK: jglh
  # CHECK: aghi {{%r[0-9]+}}, -1
  # CHECK: jglh
  # CHECK: aghi {{%r[0-9]+}}, -1
  # CHECK: jglh
  
  from __future__ import print_function
  
  branch_blocks = 8
  main_size = 0xffd8
  
  print('define void @f1(i8 *%base, i64 *%counts) {')
  print('entry:')
  
  for i in range(branch_blocks - 1, -1, -1):
      print('  %%countptr%d = getelementptr i64, i64 *%%counts, i64 %d' % (i, i))
      print('  %%initcount%d = load i64 , i64 *%%countptr%d' % (i, i))
      print('  br label %%loop%d' % i)
      
      print('loop%d:' % i)
      block1 = 'entry' if i == branch_blocks - 1 else 'loop%d' % (i + 1)
      block2 = 'loop0' if i == 0 else 'after%d' % (i - 1)
      print(('  %%count%d = phi i64 [ %%initcount%d, %%%s ],'
             ' [ %%nextcount%d, %%%s ]' % (i, i, block1, i, block2)))
  
  a, b = 1, 1
  for i in range(0, main_size, 6):
      a, b = b, a + b
      offset = 4096 + b % 500000
      value = a % 256
      print('  %%ptr%d = getelementptr i8, i8 *%%base, i64 %d' % (i, offset))
      print('  store volatile i8 %d, i8 *%%ptr%d' % (value, i))
  
  for i in range(branch_blocks):
      print('  %%nextcount%d = add i64 %%count%d, -1' % (i, i))
      print('  %%test%d = icmp ne i64 %%nextcount%d, 0' % (i, i))
      print('  br i1 %%test%d, label %%loop%d, label %%after%d' % (i, i, i))
      print('')
      print('after%d:' % i)
  
  print('  ret void')
  print('}')
  