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1; Test 16-bit byteswaps from memory to registers.2;3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s4 5declare i16 @llvm.bswap.i16(i16 %a)6 7; Check LRVH with no displacement.8define i16 @f1(ptr %src) {9; CHECK-LABEL: f1:10; CHECK: lrvh %r2, 0(%r2)11; CHECK: br %r1412 %a = load i16, ptr %src13 %swapped = call i16 @llvm.bswap.i16(i16 %a)14 ret i16 %swapped15}16 17; Check the high end of the aligned LRVH range.18define i16 @f2(ptr %src) {19; CHECK-LABEL: f2:20; CHECK: lrvh %r2, 524286(%r2)21; CHECK: br %r1422 %ptr = getelementptr i16, ptr %src, i64 26214323 %a = load i16, ptr %ptr24 %swapped = call i16 @llvm.bswap.i16(i16 %a)25 ret i16 %swapped26}27 28; Check the next word up, which needs separate address logic.29; Other sequences besides this one would be OK.30define i16 @f3(ptr %src) {31; CHECK-LABEL: f3:32; CHECK: agfi %r2, 52428833; CHECK: lrvh %r2, 0(%r2)34; CHECK: br %r1435 %ptr = getelementptr i16, ptr %src, i64 26214436 %a = load i16, ptr %ptr37 %swapped = call i16 @llvm.bswap.i16(i16 %a)38 ret i16 %swapped39}40 41; Check the high end of the negative aligned LRVH range.42define i16 @f4(ptr %src) {43; CHECK-LABEL: f4:44; CHECK: lrvh %r2, -2(%r2)45; CHECK: br %r1446 %ptr = getelementptr i16, ptr %src, i64 -147 %a = load i16, ptr %ptr48 %swapped = call i16 @llvm.bswap.i16(i16 %a)49 ret i16 %swapped50}51 52; Check the low end of the LRVH range.53define i16 @f5(ptr %src) {54; CHECK-LABEL: f5:55; CHECK: lrvh %r2, -524288(%r2)56; CHECK: br %r1457 %ptr = getelementptr i16, ptr %src, i64 -26214458 %a = load i16, ptr %ptr59 %swapped = call i16 @llvm.bswap.i16(i16 %a)60 ret i16 %swapped61}62 63; Check the next word down, which needs separate address logic.64; Other sequences besides this one would be OK.65define i16 @f6(ptr %src) {66; CHECK-LABEL: f6:67; CHECK: agfi %r2, -52429068; CHECK: lrvh %r2, 0(%r2)69; CHECK: br %r1470 %ptr = getelementptr i16, ptr %src, i64 -26214571 %a = load i16, ptr %ptr72 %swapped = call i16 @llvm.bswap.i16(i16 %a)73 ret i16 %swapped74}75 76; Check that LRVH allows an index.77define i16 @f7(i64 %src, i64 %index) {78; CHECK-LABEL: f7:79; CHECK: lrvh %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 i16, ptr %ptr85 %swapped = call i16 @llvm.bswap.i16(i16 %a)86 ret i16 %swapped87}88 89