1 ; Test 64-bit byteswaps from memory to registers. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 declare i64 @llvm.bswap.i64(i64 %a) 6 7 ; Check LRVG with no displacement. 8 define i64 @f1(i64 *%src) { 9 ; CHECK-LABEL: f1: 10 ; CHECK: lrvg %r2, 0(%r2) 11 ; CHECK: br %r14 12 %a = load i64 *%src 13 %swapped = call i64 @llvm.bswap.i64(i64 %a) 14 ret i64 %swapped 15 } 16 17 ; Check the high end of the aligned LRVG range. 18 define i64 @f2(i64 *%src) { 19 ; CHECK-LABEL: f2: 20 ; CHECK: lrvg %r2, 524280(%r2) 21 ; CHECK: br %r14 22 %ptr = getelementptr i64 *%src, i64 65535 23 %a = load i64 *%ptr 24 %swapped = call i64 @llvm.bswap.i64(i64 %a) 25 ret i64 %swapped 26 } 27 28 ; Check the next doubleword up, which needs separate address logic. 29 ; Other sequences besides this one would be OK. 30 define i64 @f3(i64 *%src) { 31 ; CHECK-LABEL: f3: 32 ; CHECK: agfi %r2, 524288 33 ; CHECK: lrvg %r2, 0(%r2) 34 ; CHECK: br %r14 35 %ptr = getelementptr i64 *%src, i64 65536 36 %a = load i64 *%ptr 37 %swapped = call i64 @llvm.bswap.i64(i64 %a) 38 ret i64 %swapped 39 } 40 41 ; Check the high end of the negative aligned LRVG range. 42 define i64 @f4(i64 *%src) { 43 ; CHECK-LABEL: f4: 44 ; CHECK: lrvg %r2, -8(%r2) 45 ; CHECK: br %r14 46 %ptr = getelementptr i64 *%src, i64 -1 47 %a = load i64 *%ptr 48 %swapped = call i64 @llvm.bswap.i64(i64 %a) 49 ret i64 %swapped 50 } 51 52 ; Check the low end of the LRVG range. 53 define i64 @f5(i64 *%src) { 54 ; CHECK-LABEL: f5: 55 ; CHECK: lrvg %r2, -524288(%r2) 56 ; CHECK: br %r14 57 %ptr = getelementptr i64 *%src, i64 -65536 58 %a = load i64 *%ptr 59 %swapped = call i64 @llvm.bswap.i64(i64 %a) 60 ret i64 %swapped 61 } 62 63 ; Check the next doubleword down, which needs separate address logic. 64 ; Other sequences besides this one would be OK. 65 define i64 @f6(i64 *%src) { 66 ; CHECK-LABEL: f6: 67 ; CHECK: agfi %r2, -524296 68 ; CHECK: lrvg %r2, 0(%r2) 69 ; CHECK: br %r14 70 %ptr = getelementptr i64 *%src, i64 -65537 71 %a = load i64 *%ptr 72 %swapped = call i64 @llvm.bswap.i64(i64 %a) 73 ret i64 %swapped 74 } 75 76 ; Check that LRVG allows an index. 77 define i64 @f7(i64 %src, i64 %index) { 78 ; CHECK-LABEL: f7: 79 ; CHECK: lrvg %r2, 524287({{%r3,%r2|%r2,%r3}}) 80 ; CHECK: br %r14 81 %add1 = add i64 %src, %index 82 %add2 = add i64 %add1, 524287 83 %ptr = inttoptr i64 %add2 to i64 * 84 %a = load i64 *%ptr 85 %swapped = call i64 @llvm.bswap.i64(i64 %a) 86 ret i64 %swapped 87 } 88 89 ; Check that volatile accesses do not use LRVG, which might access the 90 ; storage multple times. 91 define i64 @f8(i64 *%src) { 92 ; CHECK-LABEL: f8: 93 ; CHECK: lg [[REG:%r[0-5]]], 0(%r2) 94 ; CHECK: lrvgr %r2, [[REG]] 95 ; CHECK: br %r14 96 %a = load volatile i64 *%src 97 %swapped = call i64 @llvm.bswap.i64(i64 %a) 98 ret i64 %swapped 99 } 100 101 ; Test a case where we spill the source of at least one LRVGR. We want 102 ; to use LRVG if possible. 103 define void @f9(i64 *%ptr) { 104 ; CHECK-LABEL: f9: 105 ; CHECK: lrvg {{%r[0-9]+}}, 160(%r15) 106 ; CHECK: br %r14 107 %val0 = load volatile i64 *%ptr 108 %val1 = load volatile i64 *%ptr 109 %val2 = load volatile i64 *%ptr 110 %val3 = load volatile i64 *%ptr 111 %val4 = load volatile i64 *%ptr 112 %val5 = load volatile i64 *%ptr 113 %val6 = load volatile i64 *%ptr 114 %val7 = load volatile i64 *%ptr 115 %val8 = load volatile i64 *%ptr 116 %val9 = load volatile i64 *%ptr 117 %val10 = load volatile i64 *%ptr 118 %val11 = load volatile i64 *%ptr 119 %val12 = load volatile i64 *%ptr 120 %val13 = load volatile i64 *%ptr 121 %val14 = load volatile i64 *%ptr 122 %val15 = load volatile i64 *%ptr 123 124 %swapped0 = call i64 @llvm.bswap.i64(i64 %val0) 125 %swapped1 = call i64 @llvm.bswap.i64(i64 %val1) 126 %swapped2 = call i64 @llvm.bswap.i64(i64 %val2) 127 %swapped3 = call i64 @llvm.bswap.i64(i64 %val3) 128 %swapped4 = call i64 @llvm.bswap.i64(i64 %val4) 129 %swapped5 = call i64 @llvm.bswap.i64(i64 %val5) 130 %swapped6 = call i64 @llvm.bswap.i64(i64 %val6) 131 %swapped7 = call i64 @llvm.bswap.i64(i64 %val7) 132 %swapped8 = call i64 @llvm.bswap.i64(i64 %val8) 133 %swapped9 = call i64 @llvm.bswap.i64(i64 %val9) 134 %swapped10 = call i64 @llvm.bswap.i64(i64 %val10) 135 %swapped11 = call i64 @llvm.bswap.i64(i64 %val11) 136 %swapped12 = call i64 @llvm.bswap.i64(i64 %val12) 137 %swapped13 = call i64 @llvm.bswap.i64(i64 %val13) 138 %swapped14 = call i64 @llvm.bswap.i64(i64 %val14) 139 %swapped15 = call i64 @llvm.bswap.i64(i64 %val15) 140 141 store volatile i64 %val0, i64 *%ptr 142 store volatile i64 %val1, i64 *%ptr 143 store volatile i64 %val2, i64 *%ptr 144 store volatile i64 %val3, i64 *%ptr 145 store volatile i64 %val4, i64 *%ptr 146 store volatile i64 %val5, i64 *%ptr 147 store volatile i64 %val6, i64 *%ptr 148 store volatile i64 %val7, i64 *%ptr 149 store volatile i64 %val8, i64 *%ptr 150 store volatile i64 %val9, i64 *%ptr 151 store volatile i64 %val10, i64 *%ptr 152 store volatile i64 %val11, i64 *%ptr 153 store volatile i64 %val12, i64 *%ptr 154 store volatile i64 %val13, i64 *%ptr 155 store volatile i64 %val14, i64 *%ptr 156 store volatile i64 %val15, i64 *%ptr 157 158 store volatile i64 %swapped0, i64 *%ptr 159 store volatile i64 %swapped1, i64 *%ptr 160 store volatile i64 %swapped2, i64 *%ptr 161 store volatile i64 %swapped3, i64 *%ptr 162 store volatile i64 %swapped4, i64 *%ptr 163 store volatile i64 %swapped5, i64 *%ptr 164 store volatile i64 %swapped6, i64 *%ptr 165 store volatile i64 %swapped7, i64 *%ptr 166 store volatile i64 %swapped8, i64 *%ptr 167 store volatile i64 %swapped9, i64 *%ptr 168 store volatile i64 %swapped10, i64 *%ptr 169 store volatile i64 %swapped11, i64 *%ptr 170 store volatile i64 %swapped12, i64 *%ptr 171 store volatile i64 %swapped13, i64 *%ptr 172 store volatile i64 %swapped14, i64 *%ptr 173 store volatile i64 %swapped15, i64 *%ptr 174 175 ret void 176 } 177
