1# Test normal conditional branches in cases where block alignments cause
2# some branches to be out of range.
3# RUN: python %s | llc -mtriple=s390x-linux-gnu -align-all-blocks=8 | FileCheck %s
4
5# Construct:
6#
7# b0:
8#   conditional branch to end
9#   ...
10# b<N>:
11#   conditional branch to end
12# b<N+1>:
13#   conditional branch to b0
14#   ...
15# b<2*N>:
16#   conditional branch to b0
17# end:
18#
19# with N == 256 + 4.  The -align-all-blocks=8 option ensures that all blocks
20# are 256 bytes in size.  The first 4 blocks and the last 4 blocks are then
21# out of range.
22#
23# CHECK: c %r4, 0(%r3)
24# CHECK: jge [[LABEL:\.L[^ ]*]]
25# CHECK: c %r4, 4(%r3)
26# CHECK: jge [[LABEL]]
27# CHECK: c %r4, 8(%r3)
28# CHECK: jge [[LABEL]]
29# CHECK: c %r4, 12(%r3)
30# CHECK: jge [[LABEL]]
31# CHECK: c %r4, 16(%r3)
32# CHECK: je [[LABEL]]
33# CHECK: c %r4, 20(%r3)
34# CHECK: je [[LABEL]]
35# CHECK: c %r4, 24(%r3)
36# CHECK: je [[LABEL]]
37# CHECK: c %r4, 28(%r3)
38# CHECK: je [[LABEL]]
39# ...lots of other blocks...
40# CHECK: c %r4, 1004(%r3)
41# CHECK: je [[LABEL:\.L[^ ]*]]
42# CHECK: c %r4, 1008(%r3)
43# CHECK: je [[LABEL]]
44# CHECK: c %r4, 1012(%r3)
45# CHECK: je [[LABEL]]
46# CHECK: c %r4, 1016(%r3)
47# CHECK: je [[LABEL]]
48# CHECK: c %r4, 1020(%r3)
49# CHECK: je [[LABEL]]
50# CHECK: c %r4, 1024(%r3)
51# CHECK: jge [[LABEL]]
52# CHECK: c %r4, 1028(%r3)
53# CHECK: jge [[LABEL]]
54# CHECK: c %r4, 1032(%r3)
55# CHECK: jge [[LABEL]]
56# CHECK: c %r4, 1036(%r3)
57# CHECK: jge [[LABEL]]
58
59blocks = 256 + 4
60
61print 'define void @f1(i8 *%base, i32 *%stop, i32 %limit) {'
62print 'entry:'
63print '  br label %b0'
64print ''
65
66a, b = 1, 1
67for i in xrange(blocks):
68    a, b = b, a + b
69    value = a % 256
70    next = 'b%d' % (i + 1) if i + 1 < blocks else 'end'
71    other = 'end' if 2 * i < blocks else 'b0'
72    print 'b%d:' % i
73    print '  store volatile i8 %d, i8 *%%base' % value
74    print '  %%astop%d = getelementptr i32, i32 *%%stop, i64 %d' % (i, i)
75    print '  %%acur%d = load i32 , i32 *%%astop%d' % (i, i)
76    print '  %%atest%d = icmp eq i32 %%limit, %%acur%d' % (i, i)
77    print '  br i1 %%atest%d, label %%%s, label %%%s' % (i, other, next)
78
79print ''
80print '%s:' % next
81print '  ret void'
82print '}'
83