| # 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("}") |