1 ; Test 128-bit subtraction in which the second operand is variable. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s 4 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s 5 6 declare i128 *@foo() 7 8 ; Test register addition. 9 define void @f1(i128 *%ptr, i64 %high, i64 %low) { 10 ; CHECK-LABEL: f1: 11 ; CHECK: slgr {{%r[0-5]}}, %r4 12 ; CHECK: slbgr {{%r[0-5]}}, %r3 13 ; CHECK: br %r14 14 %a = load i128 *%ptr 15 %highx = zext i64 %high to i128 16 %lowx = zext i64 %low to i128 17 %bhigh = shl i128 %highx, 64 18 %b = or i128 %bhigh, %lowx 19 %sub = sub i128 %a, %b 20 store i128 %sub, i128 *%ptr 21 ret void 22 } 23 24 ; Test memory addition with no offset. 25 define void @f2(i64 %addr) { 26 ; CHECK-LABEL: f2: 27 ; CHECK: slg {{%r[0-5]}}, 8(%r2) 28 ; CHECK: slbg {{%r[0-5]}}, 0(%r2) 29 ; CHECK: br %r14 30 %bptr = inttoptr i64 %addr to i128 * 31 %aptr = getelementptr i128 *%bptr, i64 -8 32 %a = load i128 *%aptr 33 %b = load i128 *%bptr 34 %sub = sub i128 %a, %b 35 store i128 %sub, i128 *%aptr 36 ret void 37 } 38 39 ; Test the highest aligned offset that is in range of both SLG and SLBG. 40 define void @f3(i64 %base) { 41 ; CHECK-LABEL: f3: 42 ; CHECK: slg {{%r[0-5]}}, 524280(%r2) 43 ; CHECK: slbg {{%r[0-5]}}, 524272(%r2) 44 ; CHECK: br %r14 45 %addr = add i64 %base, 524272 46 %bptr = inttoptr i64 %addr to i128 * 47 %aptr = getelementptr i128 *%bptr, i64 -8 48 %a = load i128 *%aptr 49 %b = load i128 *%bptr 50 %sub = sub i128 %a, %b 51 store i128 %sub, i128 *%aptr 52 ret void 53 } 54 55 ; Test the next doubleword up, which requires separate address logic for SLG. 56 define void @f4(i64 %base) { 57 ; CHECK-LABEL: f4: 58 ; CHECK: lgr [[BASE:%r[1-5]]], %r2 59 ; CHECK: agfi [[BASE]], 524288 60 ; CHECK: slg {{%r[0-5]}}, 0([[BASE]]) 61 ; CHECK: slbg {{%r[0-5]}}, 524280(%r2) 62 ; CHECK: br %r14 63 %addr = add i64 %base, 524280 64 %bptr = inttoptr i64 %addr to i128 * 65 %aptr = getelementptr i128 *%bptr, i64 -8 66 %a = load i128 *%aptr 67 %b = load i128 *%bptr 68 %sub = sub i128 %a, %b 69 store i128 %sub, i128 *%aptr 70 ret void 71 } 72 73 ; Test the next doubleword after that, which requires separate logic for 74 ; both instructions. It would be better to create an anchor at 524288 75 ; that both instructions can use, but that isn't implemented yet. 76 define void @f5(i64 %base) { 77 ; CHECK-LABEL: f5: 78 ; CHECK: slg {{%r[0-5]}}, 0({{%r[1-5]}}) 79 ; CHECK: slbg {{%r[0-5]}}, 0({{%r[1-5]}}) 80 ; CHECK: br %r14 81 %addr = add i64 %base, 524288 82 %bptr = inttoptr i64 %addr to i128 * 83 %aptr = getelementptr i128 *%bptr, i64 -8 84 %a = load i128 *%aptr 85 %b = load i128 *%bptr 86 %sub = sub i128 %a, %b 87 store i128 %sub, i128 *%aptr 88 ret void 89 } 90 91 ; Test the lowest displacement that is in range of both SLG and SLBG. 92 define void @f6(i64 %base) { 93 ; CHECK-LABEL: f6: 94 ; CHECK: slg {{%r[0-5]}}, -524280(%r2) 95 ; CHECK: slbg {{%r[0-5]}}, -524288(%r2) 96 ; CHECK: br %r14 97 %addr = add i64 %base, -524288 98 %bptr = inttoptr i64 %addr to i128 * 99 %aptr = getelementptr i128 *%bptr, i64 -8 100 %a = load i128 *%aptr 101 %b = load i128 *%bptr 102 %sub = sub i128 %a, %b 103 store i128 %sub, i128 *%aptr 104 ret void 105 } 106 107 ; Test the next doubleword down, which is out of range of the SLBG. 108 define void @f7(i64 %base) { 109 ; CHECK-LABEL: f7: 110 ; CHECK: slg {{%r[0-5]}}, -524288(%r2) 111 ; CHECK: slbg {{%r[0-5]}}, 0({{%r[1-5]}}) 112 ; CHECK: br %r14 113 %addr = add i64 %base, -524296 114 %bptr = inttoptr i64 %addr to i128 * 115 %aptr = getelementptr i128 *%bptr, i64 -8 116 %a = load i128 *%aptr 117 %b = load i128 *%bptr 118 %sub = sub i128 %a, %b 119 store i128 %sub, i128 *%aptr 120 ret void 121 } 122 123 ; Check that subtractions of spilled values can use SLG and SLBG rather than 124 ; SLGR and SLBGR. 125 define void @f8(i128 *%ptr0) { 126 ; CHECK-LABEL: f8: 127 ; CHECK: brasl %r14, foo@PLT 128 ; CHECK: slg {{%r[0-9]+}}, {{[0-9]+}}(%r15) 129 ; CHECK: slbg {{%r[0-9]+}}, {{[0-9]+}}(%r15) 130 ; CHECK: br %r14 131 %ptr1 = getelementptr i128 *%ptr0, i128 2 132 %ptr2 = getelementptr i128 *%ptr0, i128 4 133 %ptr3 = getelementptr i128 *%ptr0, i128 6 134 %ptr4 = getelementptr i128 *%ptr0, i128 8 135 136 %val0 = load i128 *%ptr0 137 %val1 = load i128 *%ptr1 138 %val2 = load i128 *%ptr2 139 %val3 = load i128 *%ptr3 140 %val4 = load i128 *%ptr4 141 142 %retptr = call i128 *@foo() 143 144 %ret = load i128 *%retptr 145 %sub0 = sub i128 %ret, %val0 146 %sub1 = sub i128 %sub0, %val1 147 %sub2 = sub i128 %sub1, %val2 148 %sub3 = sub i128 %sub2, %val3 149 %sub4 = sub i128 %sub3, %val4 150 store i128 %sub4, i128 *%retptr 151 152 ret void 153 } 154
