[InstCombine] Signed saturation patterns
[llvm-complete.git] / test / CodeGen / SystemZ / Large / branch-range-08.py
blob2ef6859fc5c8b25a8feb8a8a106696fa26548c87
1 # Test 64-bit BRANCH RELATIVE ON COUNT in cases where some branches are out
2 # of range.
3 # RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s
5 # Construct:
7 # loopN:
8 # load of countN
9 # ...
10 # loop0:
11 # 0xffd8 bytes, from MVIY instructions
12 # conditional branch to main
13 # after0:
14 # ...
15 # decrement of countN
16 # conditional branch to loopN
17 # afterN:
19 # Each load occupies 6 bytes. Each decrement and branch occupies 4
20 # bytes if BRCTG can be used, otherwise it occupies 10 bytes (AGHI + BRCL).
21 # This means that loop 5 contains 4 * 6 + 0xffd8 + 4 * 4 == 0x10000 bytes
22 # and is therefore (just) in range. Loop 6 is out of range.
24 # CHECK: brctg {{%r[0-9]+}}
25 # CHECK: brctg {{%r[0-9]+}}
26 # CHECK: brctg {{%r[0-9]+}}
27 # CHECK: brctg {{%r[0-9]+}}
28 # CHECK: brctg {{%r[0-9]+}}
29 # CHECK: aghi {{%r[0-9]+}}, -1
30 # CHECK: jglh
31 # CHECK: aghi {{%r[0-9]+}}, -1
32 # CHECK: jglh
33 # CHECK: aghi {{%r[0-9]+}}, -1
34 # CHECK: jglh
36 from __future__ import print_function
38 branch_blocks = 8
39 main_size = 0xffd8
41 print('define void @f1(i8 *%base, i64 *%counts) {')
42 print('entry:')
44 for i in range(branch_blocks - 1, -1, -1):
45 print(' %%countptr%d = getelementptr i64, i64 *%%counts, i64 %d' % (i, i))
46 print(' %%initcount%d = load i64 , i64 *%%countptr%d' % (i, i))
47 print(' br label %%loop%d' % i)
49 print('loop%d:' % i)
50 block1 = 'entry' if i == branch_blocks - 1 else 'loop%d' % (i + 1)
51 block2 = 'loop0' if i == 0 else 'after%d' % (i - 1)
52 print((' %%count%d = phi i64 [ %%initcount%d, %%%s ],'
53 ' [ %%nextcount%d, %%%s ]' % (i, i, block1, i, block2)))
55 a, b = 1, 1
56 for i in range(0, main_size, 6):
57 a, b = b, a + b
58 offset = 4096 + b % 500000
59 value = a % 256
60 print(' %%ptr%d = getelementptr i8, i8 *%%base, i64 %d' % (i, offset))
61 print(' store volatile i8 %d, i8 *%%ptr%d' % (value, i))
63 for i in range(branch_blocks):
64 print(' %%nextcount%d = add i64 %%count%d, -1' % (i, i))
65 print(' %%test%d = icmp ne i64 %%nextcount%d, 0' % (i, i))
66 print(' br i1 %%test%d, label %%loop%d, label %%after%d' % (i, i, i))
67 print('')
68 print('after%d:' % i)
70 print(' ret void')
71 print('}')