1d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# Test 32-bit COMPARE AND BRANCH in cases where the sheer number of 2d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# instructions causes some branches to be out of range. 3d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s 4d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 5d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# Construct: 6d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# 7d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# before0: 8d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# conditional branch to after0 9d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# ... 10d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# beforeN: 11d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# conditional branch to after0 12d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# main: 13d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# 0xffcc bytes, from MVIY instructions 14d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# conditional branch to main 15d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# after0: 16d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# ... 17d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# conditional branch to main 18d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# afterN: 19d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# 20d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# Each conditional branch sequence occupies 12 bytes if it uses a short 21d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# branch and 14 if it uses a long one. The ones before "main:" have to 22d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# take the branch length into account, which is 6 for short branches, 23d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# so the final (0x34 - 6) / 12 == 3 blocks can use short branches. 24d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# The ones after "main:" do not, so the first 0x34 / 12 == 4 blocks 25d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# can use short branches. 26d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# 27d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 0(%r3) 28d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 29d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL:\.L[^ ]*]] 30d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 1(%r3) 31d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 32d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 33d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 2(%r3) 34d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 35d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 36d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 3(%r3) 37d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 38d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 39d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 4(%r3) 40d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 41d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 42d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 5(%r3) 43d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL]] 44d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 6(%r3) 45d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL]] 46d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 7(%r3) 47d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL]] 48d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# ...main goes here... 49d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 25(%r3) 50d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL:\.L[^ ]*]] 51d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 26(%r3) 52d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL]] 53d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 27(%r3) 54d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL]] 55d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 28(%r3) 56d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: crje %r4, [[REG]], [[LABEL]] 57d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 29(%r3) 58d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 59d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 60d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 30(%r3) 61d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 62d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 63d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 31(%r3) 64d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 65d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 66d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: lb [[REG:%r[0-5]]], 32(%r3) 67d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: cr %r4, [[REG]] 68d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford# CHECK: jge [[LABEL]] 69d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 70d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordbranch_blocks = 8 71d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordmain_size = 0xffcc 72d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 73d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint 'define void @f1(i8 *%base, i8 *%stop, i32 %limit) {' 74d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint 'entry:' 75d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint ' br label %before0' 76d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint '' 77d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 78d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordfor i in xrange(branch_blocks): 79d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford next = 'before%d' % (i + 1) if i + 1 < branch_blocks else 'main' 80d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print 'before%d:' % i 814c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%bstop%d = getelementptr i8, i8 *%%stop, i64 %d' % (i, i) 824c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%bcur%d = load i8 , i8 *%%bstop%d' % (i, i) 83d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' %%bext%d = sext i8 %%bcur%d to i32' % (i, i) 84d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' %%btest%d = icmp eq i32 %%limit, %%bext%d' % (i, i) 85d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' br i1 %%btest%d, label %%after0, label %%%s' % (i, next) 86d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print '' 87d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 88d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint '%s:' % next 89d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiforda, b = 1, 1 90d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordfor i in xrange(0, main_size, 6): 91d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford a, b = b, a + b 92d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford offset = 4096 + b % 500000 93d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford value = a % 256 944c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%ptr%d = getelementptr i8, i8 *%%base, i64 %d' % (i, offset) 95d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' store volatile i8 %d, i8 *%%ptr%d' % (value, i) 96d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 97d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordfor i in xrange(branch_blocks): 984c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%astop%d = getelementptr i8, i8 *%%stop, i64 %d' % (i, i + 25) 994c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar print ' %%acur%d = load i8 , i8 *%%astop%d' % (i, i) 100d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' %%aext%d = sext i8 %%acur%d to i32' % (i, i) 101d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' %%atest%d = icmp eq i32 %%limit, %%aext%d' % (i, i) 102d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print ' br i1 %%atest%d, label %%main, label %%after%d' % (i, i) 103d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print '' 104d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford print 'after%d:' % i 105d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandiford 106d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint ' ret void' 107d50bcb2162a529534da42748ab4a418bfc9aaf06Richard Sandifordprint '}' 108