1 ; Test 64-bit byteswaps from registers to memory. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 declare i64 @llvm.bswap.i64(i64 %a) 6 7 ; Check STRVG with no displacement. 8 define void @f1(i64 *%dst, i64 %a) { 9 ; CHECK-LABEL: f1: 10 ; CHECK: strvg %r3, 0(%r2) 11 ; CHECK: br %r14 12 %swapped = call i64 @llvm.bswap.i64(i64 %a) 13 store i64 %swapped, i64 *%dst 14 ret void 15 } 16 17 ; Check the high end of the aligned STRVG range. 18 define void @f2(i64 *%dst, i64 %a) { 19 ; CHECK-LABEL: f2: 20 ; CHECK: strvg %r3, 524280(%r2) 21 ; CHECK: br %r14 22 %ptr = getelementptr i64, i64 *%dst, i64 65535 23 %swapped = call i64 @llvm.bswap.i64(i64 %a) 24 store i64 %swapped, i64 *%ptr 25 ret void 26 } 27 28 ; Check the next doubleword up, which needs separate address logic. 29 ; Other sequences besides this one would be OK. 30 define void @f3(i64 *%dst, i64 %a) { 31 ; CHECK-LABEL: f3: 32 ; CHECK: agfi %r2, 524288 33 ; CHECK: strvg %r3, 0(%r2) 34 ; CHECK: br %r14 35 %ptr = getelementptr i64, i64 *%dst, i64 65536 36 %swapped = call i64 @llvm.bswap.i64(i64 %a) 37 store i64 %swapped, i64 *%ptr 38 ret void 39 } 40 41 ; Check the high end of the negative aligned STRVG range. 42 define void @f4(i64 *%dst, i64 %a) { 43 ; CHECK-LABEL: f4: 44 ; CHECK: strvg %r3, -8(%r2) 45 ; CHECK: br %r14 46 %ptr = getelementptr i64, i64 *%dst, i64 -1 47 %swapped = call i64 @llvm.bswap.i64(i64 %a) 48 store i64 %swapped, i64 *%ptr 49 ret void 50 } 51 52 ; Check the low end of the STRVG range. 53 define void @f5(i64 *%dst, i64 %a) { 54 ; CHECK-LABEL: f5: 55 ; CHECK: strvg %r3, -524288(%r2) 56 ; CHECK: br %r14 57 %ptr = getelementptr i64, i64 *%dst, i64 -65536 58 %swapped = call i64 @llvm.bswap.i64(i64 %a) 59 store i64 %swapped, i64 *%ptr 60 ret void 61 } 62 63 ; Check the next doubleword down, which needs separate address logic. 64 ; Other sequences besides this one would be OK. 65 define void @f6(i64 *%dst, i64 %a) { 66 ; CHECK-LABEL: f6: 67 ; CHECK: agfi %r2, -524296 68 ; CHECK: strvg %r3, 0(%r2) 69 ; CHECK: br %r14 70 %ptr = getelementptr i64, i64 *%dst, i64 -65537 71 %swapped = call i64 @llvm.bswap.i64(i64 %a) 72 store i64 %swapped, i64 *%ptr 73 ret void 74 } 75 76 ; Check that STRVG allows an index. 77 define void @f7(i64 %src, i64 %index, i64 %a) { 78 ; CHECK-LABEL: f7: 79 ; CHECK: strvg %r4, 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 %swapped = call i64 @llvm.bswap.i64(i64 %a) 85 store i64 %swapped, i64 *%ptr 86 ret void 87 } 88 89 ; Check that volatile stores do not use STRVG, which might access the 90 ; storage multple times. 91 define void @f8(i64 *%dst, i64 %a) { 92 ; CHECK-LABEL: f8: 93 ; CHECK: lrvgr [[REG:%r[0-5]]], %r3 94 ; CHECK: stg [[REG]], 0(%r2) 95 ; CHECK: br %r14 96 %swapped = call i64 @llvm.bswap.i64(i64 %a) 97 store volatile i64 %swapped, i64 *%dst 98 ret void 99 } 100
