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, 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, i64 *%src, i64 65535 23 %a = load i64, 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, i64 *%src, i64 65536 36 %a = load i64, 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, i64 *%src, i64 -1 47 %a = load i64, 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, i64 *%src, i64 -65536 58 %a = load i64, 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, i64 *%src, i64 -65537 71 %a = load i64, 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, i64 *%ptr 85 %swapped = call i64 @llvm.bswap.i64(i64 %a) 86 ret i64 %swapped 87 } 88 89 ; Test a case where we spill the source of at least one LRVGR. We want 90 ; to use LRVG if possible. 91 define i64 @f8(i64 *%ptr) { 92 ; CHECK-LABEL: f8: 93 ; CHECK: lrvg {{%r[0-9]+}}, 160(%r15) 94 ; CHECK: br %r14 95 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, %swapped1 119 %ret2 = add i64 %ret1, %swapped2 120 %ret3 = add i64 %ret2, %swapped3 121 %ret4 = add i64 %ret3, %swapped4 122 %ret5 = add i64 %ret4, %swapped5 123 %ret6 = add i64 %ret5, %swapped6 124 %ret7 = add i64 %ret6, %swapped7 125 %ret8 = add i64 %ret7, %swapped8 126 %ret9 = add i64 %ret8, %swapped9 127 128 ret i64 %ret9 129 } 130 131 declare i64 @foo() 132
