144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# Test normal conditional branches in cases where the sheer number of 244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# instructions causes some branches to be out of range. 344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s 444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# Construct: 644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# 744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# before0: 844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# conditional branch to after0 944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# ... 1044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# beforeN: 1144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# conditional branch to after0 1244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# main: 1344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# 0xffd8 bytes, from MVIY instructions 1444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# conditional branch to main 1544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# after0: 1644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# ... 1744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# conditional branch to main 1844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# afterN: 1944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# 2044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# Each conditional branch sequence occupies 8 bytes if it uses a short branch 2144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# and 10 if it uses a long one. The ones before "main:" have to take the branch 2244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# length into account -- which is 4 bytes for short branches -- so the final 2344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# (0x28 - 4) / 8 == 4 blocks can use short branches. The ones after "main:" 2444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# do not, so the first 0x28 / 8 == 5 can use short branches. However, 2544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# the conservative algorithm we use makes one branch unnecessarily long 2644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# on each side. 2744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# 2844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 0(%r3) 2944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL:\.L[^ ]*]] 3044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 4(%r3) 3144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 3244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 8(%r3) 3344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 3444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 12(%r3) 3544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 3644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 16(%r3) 3744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 3844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 20(%r3) 3944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 4044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 24(%r3) 4144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: j{{g?}}e [[LABEL]] 4244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 28(%r3) 4344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL]] 4444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 32(%r3) 4544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL]] 4644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 36(%r3) 4744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL]] 4844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# ...main goes here... 4944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 100(%r3) 5044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL:\.L[^ ]*]] 5144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 104(%r3) 5244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL]] 5344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 108(%r3) 5444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL]] 5544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 112(%r3) 5644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: je [[LABEL]] 5744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 116(%r3) 5844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: j{{g?}}e [[LABEL]] 5944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 120(%r3) 6044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 6144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 124(%r3) 6244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 6344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 128(%r3) 6444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 6544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 132(%r3) 6644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 6744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: c %r4, 136(%r3) 6844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford# CHECK: jge [[LABEL]] 6944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 7044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordbranch_blocks = 10 7144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordmain_size = 0xffd8 7244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 7344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint 'define void @f1(i8 *%base, i32 *%stop, i32 %limit) {' 7444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint 'entry:' 7544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint ' br label %before0' 7644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint '' 7744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 7844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordfor i in xrange(branch_blocks): 7944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford next = 'before%d' % (i + 1) if i + 1 < branch_blocks else 'main' 8044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print 'before%d:' % i 8144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' %%bstop%d = getelementptr i32 *%%stop, i64 %d' % (i, i) 8236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines print ' %%bcur%d = load i32 *%%bstop%d' % (i, i) 8344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' %%btest%d = icmp eq i32 %%limit, %%bcur%d' % (i, i) 8444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' br i1 %%btest%d, label %%after0, label %%%s' % (i, next) 8544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print '' 8644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 8744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint '%s:' % next 8844b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiforda, b = 1, 1 8944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordfor i in xrange(0, main_size, 6): 9044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford a, b = b, a + b 9144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford offset = 4096 + b % 500000 9244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford value = a % 256 9344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' %%ptr%d = getelementptr i8 *%%base, i64 %d' % (i, offset) 9444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' store volatile i8 %d, i8 *%%ptr%d' % (value, i) 9544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 9644b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordfor i in xrange(branch_blocks): 9744b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' %%astop%d = getelementptr i32 *%%stop, i64 %d' % (i, i + 25) 9836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines print ' %%acur%d = load i32 *%%astop%d' % (i, i) 9944b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' %%atest%d = icmp eq i32 %%limit, %%acur%d' % (i, i) 10044b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print ' br i1 %%atest%d, label %%main, label %%after%d' % (i, i) 10144b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print '' 10244b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford print 'after%d:' % i 10344b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandiford 10444b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint ' ret void' 10544b486ed78c60b50aa14d4eed92ee828d4d44293Richard Sandifordprint '}' 106