1; Test sign extensions from a halfword to an i32. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5; Test register extension, starting with an i32. 6define i32 @f1(i32 %a) { 7; CHECK-LABEL: f1: 8; CHECK: lhr %r2, %r2 9; CHECK: br %r14 10 %half = trunc i32 %a to i16 11 %ext = sext i16 %half to i32 12 ret i32 %ext 13} 14 15; ...and again with an i64. 16define i32 @f2(i64 %a) { 17; CHECK-LABEL: f2: 18; CHECK: lhr %r2, %r2 19; CHECK: br %r14 20 %half = trunc i64 %a to i16 21 %ext = sext i16 %half to i32 22 ret i32 %ext 23} 24 25; Check the low end of the LH range. 26define i32 @f3(i16 *%src) { 27; CHECK-LABEL: f3: 28; CHECK: lh %r2, 0(%r2) 29; CHECK: br %r14 30 %half = load i16 *%src 31 %ext = sext i16 %half to i32 32 ret i32 %ext 33} 34 35; Check the high end of the LH range. 36define i32 @f4(i16 *%src) { 37; CHECK-LABEL: f4: 38; CHECK: lh %r2, 4094(%r2) 39; CHECK: br %r14 40 %ptr = getelementptr i16 *%src, i64 2047 41 %half = load i16 *%ptr 42 %ext = sext i16 %half to i32 43 ret i32 %ext 44} 45 46; Check the next halfword up, which needs LHY rather than LH. 47define i32 @f5(i16 *%src) { 48; CHECK-LABEL: f5: 49; CHECK: lhy %r2, 4096(%r2) 50; CHECK: br %r14 51 %ptr = getelementptr i16 *%src, i64 2048 52 %half = load i16 *%ptr 53 %ext = sext i16 %half to i32 54 ret i32 %ext 55} 56 57; Check the high end of the LHY range. 58define i32 @f6(i16 *%src) { 59; CHECK-LABEL: f6: 60; CHECK: lhy %r2, 524286(%r2) 61; CHECK: br %r14 62 %ptr = getelementptr i16 *%src, i64 262143 63 %half = load i16 *%ptr 64 %ext = sext i16 %half to i32 65 ret i32 %ext 66} 67 68; Check the next halfword up, which needs separate address logic. 69; Other sequences besides this one would be OK. 70define i32 @f7(i16 *%src) { 71; CHECK-LABEL: f7: 72; CHECK: agfi %r2, 524288 73; CHECK: lh %r2, 0(%r2) 74; CHECK: br %r14 75 %ptr = getelementptr i16 *%src, i64 262144 76 %half = load i16 *%ptr 77 %ext = sext i16 %half to i32 78 ret i32 %ext 79} 80 81; Check the high end of the negative LHY range. 82define i32 @f8(i16 *%src) { 83; CHECK-LABEL: f8: 84; CHECK: lhy %r2, -2(%r2) 85; CHECK: br %r14 86 %ptr = getelementptr i16 *%src, i64 -1 87 %half = load i16 *%ptr 88 %ext = sext i16 %half to i32 89 ret i32 %ext 90} 91 92; Check the low end of the LHY range. 93define i32 @f9(i16 *%src) { 94; CHECK-LABEL: f9: 95; CHECK: lhy %r2, -524288(%r2) 96; CHECK: br %r14 97 %ptr = getelementptr i16 *%src, i64 -262144 98 %half = load i16 *%ptr 99 %ext = sext i16 %half to i32 100 ret i32 %ext 101} 102 103; Check the next halfword down, which needs separate address logic. 104; Other sequences besides this one would be OK. 105define i32 @f10(i16 *%src) { 106; CHECK-LABEL: f10: 107; CHECK: agfi %r2, -524290 108; CHECK: lh %r2, 0(%r2) 109; CHECK: br %r14 110 %ptr = getelementptr i16 *%src, i64 -262145 111 %half = load i16 *%ptr 112 %ext = sext i16 %half to i32 113 ret i32 %ext 114} 115 116; Check that LH allows an index 117define i32 @f11(i64 %src, i64 %index) { 118; CHECK-LABEL: f11: 119; CHECK: lh %r2, 4094(%r3,%r2) 120; CHECK: br %r14 121 %add1 = add i64 %src, %index 122 %add2 = add i64 %add1, 4094 123 %ptr = inttoptr i64 %add2 to i16 * 124 %half = load i16 *%ptr 125 %ext = sext i16 %half to i32 126 ret i32 %ext 127} 128 129; Check that LH allows an index 130define i32 @f12(i64 %src, i64 %index) { 131; CHECK-LABEL: f12: 132; CHECK: lhy %r2, 4096(%r3,%r2) 133; CHECK: br %r14 134 %add1 = add i64 %src, %index 135 %add2 = add i64 %add1, 4096 136 %ptr = inttoptr i64 %add2 to i16 * 137 %half = load i16 *%ptr 138 %ext = sext i16 %half to i32 139 ret i32 %ext 140} 141 142; Test a case where we spill the source of at least one LHR. We want 143; to use LH if possible. 144define void @f13(i32 *%ptr) { 145; CHECK-LABEL: f13: 146; CHECK: lh {{%r[0-9]+}}, 16{{[26]}}(%r15) 147; CHECK: br %r14 148 %val0 = load volatile i32 *%ptr 149 %val1 = load volatile i32 *%ptr 150 %val2 = load volatile i32 *%ptr 151 %val3 = load volatile i32 *%ptr 152 %val4 = load volatile i32 *%ptr 153 %val5 = load volatile i32 *%ptr 154 %val6 = load volatile i32 *%ptr 155 %val7 = load volatile i32 *%ptr 156 %val8 = load volatile i32 *%ptr 157 %val9 = load volatile i32 *%ptr 158 %val10 = load volatile i32 *%ptr 159 %val11 = load volatile i32 *%ptr 160 %val12 = load volatile i32 *%ptr 161 %val13 = load volatile i32 *%ptr 162 %val14 = load volatile i32 *%ptr 163 %val15 = load volatile i32 *%ptr 164 165 %trunc0 = trunc i32 %val0 to i16 166 %trunc1 = trunc i32 %val1 to i16 167 %trunc2 = trunc i32 %val2 to i16 168 %trunc3 = trunc i32 %val3 to i16 169 %trunc4 = trunc i32 %val4 to i16 170 %trunc5 = trunc i32 %val5 to i16 171 %trunc6 = trunc i32 %val6 to i16 172 %trunc7 = trunc i32 %val7 to i16 173 %trunc8 = trunc i32 %val8 to i16 174 %trunc9 = trunc i32 %val9 to i16 175 %trunc10 = trunc i32 %val10 to i16 176 %trunc11 = trunc i32 %val11 to i16 177 %trunc12 = trunc i32 %val12 to i16 178 %trunc13 = trunc i32 %val13 to i16 179 %trunc14 = trunc i32 %val14 to i16 180 %trunc15 = trunc i32 %val15 to i16 181 182 %ext0 = sext i16 %trunc0 to i32 183 %ext1 = sext i16 %trunc1 to i32 184 %ext2 = sext i16 %trunc2 to i32 185 %ext3 = sext i16 %trunc3 to i32 186 %ext4 = sext i16 %trunc4 to i32 187 %ext5 = sext i16 %trunc5 to i32 188 %ext6 = sext i16 %trunc6 to i32 189 %ext7 = sext i16 %trunc7 to i32 190 %ext8 = sext i16 %trunc8 to i32 191 %ext9 = sext i16 %trunc9 to i32 192 %ext10 = sext i16 %trunc10 to i32 193 %ext11 = sext i16 %trunc11 to i32 194 %ext12 = sext i16 %trunc12 to i32 195 %ext13 = sext i16 %trunc13 to i32 196 %ext14 = sext i16 %trunc14 to i32 197 %ext15 = sext i16 %trunc15 to i32 198 199 store volatile i32 %val0, i32 *%ptr 200 store volatile i32 %val1, i32 *%ptr 201 store volatile i32 %val2, i32 *%ptr 202 store volatile i32 %val3, i32 *%ptr 203 store volatile i32 %val4, i32 *%ptr 204 store volatile i32 %val5, i32 *%ptr 205 store volatile i32 %val6, i32 *%ptr 206 store volatile i32 %val7, i32 *%ptr 207 store volatile i32 %val8, i32 *%ptr 208 store volatile i32 %val9, i32 *%ptr 209 store volatile i32 %val10, i32 *%ptr 210 store volatile i32 %val11, i32 *%ptr 211 store volatile i32 %val12, i32 *%ptr 212 store volatile i32 %val13, i32 *%ptr 213 store volatile i32 %val14, i32 *%ptr 214 store volatile i32 %val15, i32 *%ptr 215 216 store volatile i32 %ext0, i32 *%ptr 217 store volatile i32 %ext1, i32 *%ptr 218 store volatile i32 %ext2, i32 *%ptr 219 store volatile i32 %ext3, i32 *%ptr 220 store volatile i32 %ext4, i32 *%ptr 221 store volatile i32 %ext5, i32 *%ptr 222 store volatile i32 %ext6, i32 *%ptr 223 store volatile i32 %ext7, i32 *%ptr 224 store volatile i32 %ext8, i32 *%ptr 225 store volatile i32 %ext9, i32 *%ptr 226 store volatile i32 %ext10, i32 *%ptr 227 store volatile i32 %ext11, i32 *%ptr 228 store volatile i32 %ext12, i32 *%ptr 229 store volatile i32 %ext13, i32 *%ptr 230 store volatile i32 %ext14, i32 *%ptr 231 store volatile i32 %ext15, i32 *%ptr 232 233 ret void 234} 235