| # 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]] |
| |
| from __future__ import print_function |
| |
| 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 range(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('}') |
