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