1 # Test normal conditional branches in cases where the sheer number of
2 # instructions causes some branches to be out of range.
3 # RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s
8 # conditional branch to after0
11 # conditional branch to after0
13 # 0xffd8 bytes, from MVIY instructions
14 # conditional branch to main
17 # conditional branch to main
20 # Each conditional branch sequence occupies 8 bytes if it uses a short branch
21 # and 10 if it uses a long one. The ones before "main:" have to take the branch
22 # length into account -- which is 4 bytes for short branches -- so the final
23 # (0x28 - 4) / 8 == 4 blocks can use short branches. The ones after "main:"
24 # do not, so the first 0x28 / 8 == 5 can use short branches. However,
25 # the conservative algorithm we use makes one branch unnecessarily long
28 # CHECK: c %r4, 0(%r3)
29 # CHECK: jge [[LABEL:\.L[^ ]*]]
30 # CHECK: c %r4, 4(%r3)
31 # CHECK: jge [[LABEL]]
32 # CHECK: c %r4, 8(%r3)
33 # CHECK: jge [[LABEL]]
34 # CHECK: c %r4, 12(%r3)
35 # CHECK: jge [[LABEL]]
36 # CHECK: c %r4, 16(%r3)
37 # CHECK: jge [[LABEL]]
38 # CHECK: c %r4, 20(%r3)
39 # CHECK: jge [[LABEL]]
40 # CHECK: c %r4, 24(%r3)
41 # CHECK: j{{g?}}e [[LABEL]]
42 # CHECK: c %r4, 28(%r3)
44 # CHECK: c %r4, 32(%r3)
46 # CHECK: c %r4, 36(%r3)
48 # ...main goes here...
49 # CHECK: c %r4, 100(%r3)
50 # CHECK: je [[LABEL:\.L[^ ]*]]
51 # CHECK: c %r4, 104(%r3)
53 # CHECK: c %r4, 108(%r3)
55 # CHECK: c %r4, 112(%r3)
57 # CHECK: c %r4, 116(%r3)
58 # CHECK: j{{g?}}e [[LABEL]]
59 # CHECK: c %r4, 120(%r3)
60 # CHECK: jge [[LABEL]]
61 # CHECK: c %r4, 124(%r3)
62 # CHECK: jge [[LABEL]]
63 # CHECK: c %r4, 128(%r3)
64 # CHECK: jge [[LABEL]]
65 # CHECK: c %r4, 132(%r3)
66 # CHECK: jge [[LABEL]]
67 # CHECK: c %r4, 136(%r3)
68 # CHECK: jge [[LABEL]]
73 print 'define void @f1(i8 *%base, i32 *%stop, i32 %limit) {'
75 print ' br label %before0'
78 for i in xrange(branch_blocks):
79 next = 'before%d' % (i + 1) if i + 1 < branch_blocks else 'main'
81 print ' %%bstop%d = getelementptr i32, i32 *%%stop, i64 %d' % (i, i)
82 print ' %%bcur%d = load i32 , i32 *%%bstop%d' % (i, i)
83 print ' %%btest%d = icmp eq i32 %%limit, %%bcur%d' % (i, i)
84 print ' br i1 %%btest%d, label %%after0, label %%%s' % (i, next)
89 for i in xrange(0, main_size, 6):
91 offset = 4096 + b % 500000
93 print ' %%ptr%d = getelementptr i8, i8 *%%base, i64 %d' % (i, offset)
94 print ' store volatile i8 %d, i8 *%%ptr%d' % (value, i)
96 for i in xrange(branch_blocks):
97 print ' %%astop%d = getelementptr i32, i32 *%%stop, i64 %d' % (i, i + 25)
98 print ' %%acur%d = load i32 , i32 *%%astop%d' % (i, i)
99 print ' %%atest%d = icmp eq i32 %%limit, %%acur%d' % (i, i)
100 print ' br i1 %%atest%d, label %%main, label %%after%d' % (i, i)