1e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# Test 64-bit COMPARE LOGICAL IMMEDIATE AND BRANCH in cases where the sheer 2e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# number of instructions causes some branches to be out of range. 3e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s 4e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 5e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# Construct: 6e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# 7e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# before0: 8e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# conditional branch to after0 9e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# ... 10e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# beforeN: 11e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# conditional branch to after0 12e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# main: 13e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# 0xffb4 bytes, from MVIY instructions 14e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# conditional branch to main 15e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# after0: 16e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# ... 17e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# conditional branch to main 18e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# afterN: 19e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# 20e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# Each conditional branch sequence occupies 18 bytes if it uses a short 21e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# branch and 24 if it uses a long one. The ones before "main:" have to 22e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# take the branch length into account, which is 6 for short branches, 23e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# so the final (0x4c - 6) / 18 == 3 blocks can use short branches. 24e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# The ones after "main:" do not, so the first 0x4c / 18 == 4 blocks 25e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# can use short branches. The conservative algorithm we use makes 26e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# one of the forward branches unnecessarily long, as noted in the 27e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# check output below. 28e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# 29e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 30e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 31e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 50 32e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL:\.L[^ ]*]] 33e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 34e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 35e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 51 36e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 37e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 38e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 39e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 52 40e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 41e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 42e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 43e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 53 44e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 45e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 46e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 47e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 54 48e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 49e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# ...as mentioned above, the next one could be a CLGIJL instead... 50e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 51e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 52e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 55 53e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 54e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 55e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 56e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgijl [[REG]], 56, [[LABEL]] 57e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 58e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 59e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgijl [[REG]], 57, [[LABEL]] 60e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# ...main goes here... 61e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 62e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 63e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgijl [[REG]], 100, [[LABEL:\.L[^ ]*]] 64e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 65e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 66e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgijl [[REG]], 101, [[LABEL]] 67e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 68e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 69e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgijl [[REG]], 102, [[LABEL]] 70e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 71e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 72e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgijl [[REG]], 103, [[LABEL]] 73e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 74e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 75e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 104 76e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 77e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 78e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 79e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 105 80e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 81e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 82e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 83e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 106 84e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 85e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: lg [[REG:%r[0-5]]], 0(%r3) 86e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: sg [[REG]], 0(%r4) 87e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: clgfi [[REG]], 107 88e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford# CHECK: jgl [[LABEL]] 89e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 90e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordbranch_blocks = 8 91e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordmain_size = 0xffb4 92e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 93de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainarprint '@global = global i32 0' 94de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar 95e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint 'define void @f1(i8 *%base, i64 *%stopa, i64 *%stopb) {' 96e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint 'entry:' 97e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint ' br label %before0' 98e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint '' 99e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 100e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordfor i in xrange(branch_blocks): 101e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford next = 'before%d' % (i + 1) if i + 1 < branch_blocks else 'main' 102e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print 'before%d:' % i 1034c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%bcur%da = load i64 , i64 *%%stopa' % i 1044c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%bcur%db = load i64 , i64 *%%stopb' % i 105e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' %%bsub%d = sub i64 %%bcur%da, %%bcur%db' % (i, i, i) 106e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' %%btest%d = icmp ult i64 %%bsub%d, %d' % (i, i, i + 50) 107e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' br i1 %%btest%d, label %%after0, label %%%s' % (i, next) 108e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print '' 109e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 110e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint '%s:' % next 111e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiforda, b = 1, 1 112e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordfor i in xrange(0, main_size, 6): 113e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford a, b = b, a + b 114e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford offset = 4096 + b % 500000 115e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford value = a % 256 1164c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%ptr%d = getelementptr i8, i8 *%%base, i64 %d' % (i, offset) 117e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' store volatile i8 %d, i8 *%%ptr%d' % (value, i) 118e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 119e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordfor i in xrange(branch_blocks): 1204c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%acur%da = load i64 , i64 *%%stopa' % i 1214c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%acur%db = load i64 , i64 *%%stopb' % i 122e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' %%asub%d = sub i64 %%acur%da, %%acur%db' % (i, i, i) 123e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' %%atest%d = icmp ult i64 %%asub%d, %d' % (i, i, i + 100) 124e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print ' br i1 %%atest%d, label %%main, label %%after%d' % (i, i) 125e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print '' 126e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford print 'after%d:' % i 127e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandiford 128de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainarprint ' %dummy = load volatile i32, i32 *@global' 129e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint ' ret void' 130e2d6f91d63a2e8cf77b07794cda7d9ef72504769Richard Sandifordprint '}' 131