# 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: # conditional branch to end # b: # 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("}")