85 lines
2.1 KiB
Python
85 lines
2.1 KiB
Python
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# Test normal conditional branches in cases where block alignments cause
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# some branches to be out of range.
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# RUN: python %s | llc -mtriple=s390x-linux-gnu -align-all-blocks=8 | FileCheck %s
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# Construct:
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#
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# b0:
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# conditional branch to end
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# ...
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# b<N>:
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# conditional branch to end
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# b<N+1>:
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# conditional branch to b0
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# ...
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# b<2*N>:
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# conditional branch to b0
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# end:
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#
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# with N == 256 + 4. The -align-all-blocks=8 option ensures that all blocks
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# are 256 bytes in size. The first 4 blocks and the last 4 blocks are then
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# out of range.
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#
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# CHECK: c %r4, 0(%r3)
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# CHECK: jge [[LABEL:\.L[^ ]*]]
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# CHECK: c %r4, 4(%r3)
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# CHECK: jge [[LABEL]]
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# CHECK: c %r4, 8(%r3)
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# CHECK: jge [[LABEL]]
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# CHECK: c %r4, 12(%r3)
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# CHECK: jge [[LABEL]]
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# CHECK: c %r4, 16(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 20(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 24(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 28(%r3)
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# CHECK: je [[LABEL]]
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# ...lots of other blocks...
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# CHECK: c %r4, 1004(%r3)
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# CHECK: je [[LABEL:\.L[^ ]*]]
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# CHECK: c %r4, 1008(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 1012(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 1016(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 1020(%r3)
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# CHECK: je [[LABEL]]
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# CHECK: c %r4, 1024(%r3)
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# CHECK: jge [[LABEL]]
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# CHECK: c %r4, 1028(%r3)
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# CHECK: jge [[LABEL]]
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# CHECK: c %r4, 1032(%r3)
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# CHECK: jge [[LABEL]]
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# CHECK: c %r4, 1036(%r3)
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# CHECK: jge [[LABEL]]
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from __future__ import print_function
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blocks = 256 + 4
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print('define void @f1(i8 *%base, i32 *%stop, i32 %limit) {')
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print('entry:')
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print(' br label %b0')
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print('')
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a, b = 1, 1
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for i in range(blocks):
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a, b = b, a + b
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value = a % 256
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next = 'b%d' % (i + 1) if i + 1 < blocks else 'end'
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other = 'end' if 2 * i < blocks else 'b0'
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print('b%d:' % i)
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print(' store volatile i8 %d, i8 *%%base' % value)
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print(' %%astop%d = getelementptr i32, i32 *%%stop, i64 %d' % (i, i))
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print(' %%acur%d = load i32 , i32 *%%astop%d' % (i, i))
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print(' %%atest%d = icmp eq i32 %%limit, %%acur%d' % (i, i))
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print(' br i1 %%atest%d, label %%%s, label %%%s' % (i, other, next))
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print('')
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print('%s:' % next)
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print(' ret void')
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print('}')
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