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1; Test 64-bit byteswaps from memory to registers.2;3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s4 5declare i64 @llvm.bswap.i64(i64 %a)6 7; Check LRVG with no displacement.8define i64 @f1(ptr %src) {9; CHECK-LABEL: f1:10; CHECK: lrvg %r2, 0(%r2)11; CHECK: br %r1412 %a = load i64, ptr %src13 %swapped = call i64 @llvm.bswap.i64(i64 %a)14 ret i64 %swapped15}16 17; Check the high end of the aligned LRVG range.18define i64 @f2(ptr %src) {19; CHECK-LABEL: f2:20; CHECK: lrvg %r2, 524280(%r2)21; CHECK: br %r1422 %ptr = getelementptr i64, ptr %src, i64 6553523 %a = load i64, ptr %ptr24 %swapped = call i64 @llvm.bswap.i64(i64 %a)25 ret i64 %swapped26}27 28; Check the next doubleword up, which needs separate address logic.29; Other sequences besides this one would be OK.30define i64 @f3(ptr %src) {31; CHECK-LABEL: f3:32; CHECK: agfi %r2, 52428833; CHECK: lrvg %r2, 0(%r2)34; CHECK: br %r1435 %ptr = getelementptr i64, ptr %src, i64 6553636 %a = load i64, ptr %ptr37 %swapped = call i64 @llvm.bswap.i64(i64 %a)38 ret i64 %swapped39}40 41; Check the high end of the negative aligned LRVG range.42define i64 @f4(ptr %src) {43; CHECK-LABEL: f4:44; CHECK: lrvg %r2, -8(%r2)45; CHECK: br %r1446 %ptr = getelementptr i64, ptr %src, i64 -147 %a = load i64, ptr %ptr48 %swapped = call i64 @llvm.bswap.i64(i64 %a)49 ret i64 %swapped50}51 52; Check the low end of the LRVG range.53define i64 @f5(ptr %src) {54; CHECK-LABEL: f5:55; CHECK: lrvg %r2, -524288(%r2)56; CHECK: br %r1457 %ptr = getelementptr i64, ptr %src, i64 -6553658 %a = load i64, ptr %ptr59 %swapped = call i64 @llvm.bswap.i64(i64 %a)60 ret i64 %swapped61}62 63; Check the next doubleword down, which needs separate address logic.64; Other sequences besides this one would be OK.65define i64 @f6(ptr %src) {66; CHECK-LABEL: f6:67; CHECK: agfi %r2, -52429668; CHECK: lrvg %r2, 0(%r2)69; CHECK: br %r1470 %ptr = getelementptr i64, ptr %src, i64 -6553771 %a = load i64, ptr %ptr72 %swapped = call i64 @llvm.bswap.i64(i64 %a)73 ret i64 %swapped74}75 76; Check that LRVG allows an index.77define i64 @f7(i64 %src, i64 %index) {78; CHECK-LABEL: f7:79; CHECK: lrvg %r2, 524287({{%r3,%r2|%r2,%r3}})80; CHECK: br %r1481 %add1 = add i64 %src, %index82 %add2 = add i64 %add1, 52428783 %ptr = inttoptr i64 %add2 to ptr84 %a = load i64, ptr %ptr85 %swapped = call i64 @llvm.bswap.i64(i64 %a)86 ret i64 %swapped87}88 89; Test a case where we spill the source of at least one LRVGR. We want90; to use LRVG if possible.91define i64 @f8(ptr %ptr) {92; CHECK-LABEL: f8:93; CHECK: lrvg {{%r[0-9]+}}, 160(%r15)94; CHECK: br %r1495 96 %val0 = call i64 @foo()97 %val1 = call i64 @foo()98 %val2 = call i64 @foo()99 %val3 = call i64 @foo()100 %val4 = call i64 @foo()101 %val5 = call i64 @foo()102 %val6 = call i64 @foo()103 %val7 = call i64 @foo()104 %val8 = call i64 @foo()105 %val9 = call i64 @foo()106 107 %swapped0 = call i64 @llvm.bswap.i64(i64 %val0)108 %swapped1 = call i64 @llvm.bswap.i64(i64 %val1)109 %swapped2 = call i64 @llvm.bswap.i64(i64 %val2)110 %swapped3 = call i64 @llvm.bswap.i64(i64 %val3)111 %swapped4 = call i64 @llvm.bswap.i64(i64 %val4)112 %swapped5 = call i64 @llvm.bswap.i64(i64 %val5)113 %swapped6 = call i64 @llvm.bswap.i64(i64 %val6)114 %swapped7 = call i64 @llvm.bswap.i64(i64 %val7)115 %swapped8 = call i64 @llvm.bswap.i64(i64 %val8)116 %swapped9 = call i64 @llvm.bswap.i64(i64 %val9)117 118 %ret1 = add i64 %swapped0, %swapped1119 %ret2 = add i64 %ret1, %swapped2120 %ret3 = add i64 %ret2, %swapped3121 %ret4 = add i64 %ret3, %swapped4122 %ret5 = add i64 %ret4, %swapped5123 %ret6 = add i64 %ret5, %swapped6124 %ret7 = add i64 %ret6, %swapped7125 %ret8 = add i64 %ret7, %swapped8126 %ret9 = add i64 %ret8, %swapped9127 128 ret i64 %ret9129}130 131declare i64 @foo()132