1 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-linux-gnu | FileCheck %s 2 3 ; Note that this should be refactored (for efficiency if nothing else) 4 ; when the PCS is implemented so we don't have to worry about the 5 ; loads and stores. 6 7 @var_i32 = global i32 42 8 @var2_i32 = global i32 43 9 @var_i64 = global i64 0 10 11 ; Add pure 12-bit immediates: 12 define void @add_small() { 13 ; CHECK-LABEL: add_small: 14 15 ; CHECK: add {{w[0-9]+}}, {{w[0-9]+}}, #4095 16 %val32 = load i32, i32* @var_i32 17 %newval32 = add i32 %val32, 4095 18 store i32 %newval32, i32* @var_i32 19 20 ; CHECK: add {{x[0-9]+}}, {{x[0-9]+}}, #52 21 %val64 = load i64, i64* @var_i64 22 %newval64 = add i64 %val64, 52 23 store i64 %newval64, i64* @var_i64 24 25 ret void 26 } 27 28 ; Make sure we grab the imm variant when the register operand 29 ; can be implicitly zero-extend. 30 ; We used to generate something horrible like this: 31 ; wA = ldrb 32 ; xB = ldimm 12 33 ; xC = add xB, wA, uxtb 34 ; whereas this can be achieved with: 35 ; wA = ldrb 36 ; xC = add xA, #12 ; <- xA implicitly zero extend wA. 37 define void @add_small_imm(i8* %p, i64* %q, i32 %b, i32* %addr) { 38 ; CHECK-LABEL: add_small_imm: 39 entry: 40 41 ; CHECK: ldrb w[[LOAD32:[0-9]+]], [x0] 42 %t = load i8, i8* %p 43 %promoted = zext i8 %t to i64 44 %zextt = zext i8 %t to i32 45 %add = add nuw i32 %zextt, %b 46 47 ; CHECK: add [[ADD2:x[0-9]+]], x[[LOAD32]], #12 48 %add2 = add nuw i64 %promoted, 12 49 store i32 %add, i32* %addr 50 51 ; CHECK: str [[ADD2]], [x1] 52 store i64 %add2, i64* %q 53 ret void 54 } 55 56 ; Add 12-bit immediates, shifted left by 12 bits 57 define void @add_med() { 58 ; CHECK-LABEL: add_med: 59 60 ; CHECK: add {{w[0-9]+}}, {{w[0-9]+}}, {{#3567, lsl #12|#14610432}} 61 %val32 = load i32, i32* @var_i32 62 %newval32 = add i32 %val32, 14610432 ; =0xdef000 63 store i32 %newval32, i32* @var_i32 64 65 ; CHECK: add {{x[0-9]+}}, {{x[0-9]+}}, {{#4095, lsl #12|#16773120}} 66 %val64 = load i64, i64* @var_i64 67 %newval64 = add i64 %val64, 16773120 ; =0xfff000 68 store i64 %newval64, i64* @var_i64 69 70 ret void 71 } 72 73 ; Subtract 12-bit immediates 74 define void @sub_small() { 75 ; CHECK-LABEL: sub_small: 76 77 ; CHECK: sub {{w[0-9]+}}, {{w[0-9]+}}, #4095 78 %val32 = load i32, i32* @var_i32 79 %newval32 = sub i32 %val32, 4095 80 store i32 %newval32, i32* @var_i32 81 82 ; CHECK: sub {{x[0-9]+}}, {{x[0-9]+}}, #52 83 %val64 = load i64, i64* @var_i64 84 %newval64 = sub i64 %val64, 52 85 store i64 %newval64, i64* @var_i64 86 87 ret void 88 } 89 90 ; Subtract 12-bit immediates, shifted left by 12 bits 91 define void @sub_med() { 92 ; CHECK-LABEL: sub_med: 93 94 ; CHECK: sub {{w[0-9]+}}, {{w[0-9]+}}, {{#3567, lsl #12|#14610432}} 95 %val32 = load i32, i32* @var_i32 96 %newval32 = sub i32 %val32, 14610432 ; =0xdef000 97 store i32 %newval32, i32* @var_i32 98 99 ; CHECK: sub {{x[0-9]+}}, {{x[0-9]+}}, {{#4095, lsl #12|#16773120}} 100 %val64 = load i64, i64* @var_i64 101 %newval64 = sub i64 %val64, 16773120 ; =0xfff000 102 store i64 %newval64, i64* @var_i64 103 104 ret void 105 } 106 107 define void @testing() { 108 ; CHECK-LABEL: testing: 109 %val = load i32, i32* @var_i32 110 %val2 = load i32, i32* @var2_i32 111 112 ; CHECK: cmp {{w[0-9]+}}, #4095 113 ; CHECK: b.ne [[RET:.?LBB[0-9]+_[0-9]+]] 114 %cmp_pos_small = icmp ne i32 %val, 4095 115 br i1 %cmp_pos_small, label %ret, label %test2 116 117 test2: 118 ; CHECK: cmp {{w[0-9]+}}, {{#3567, lsl #12|#14610432}} 119 ; CHECK: b.lo [[RET]] 120 %newval2 = add i32 %val, 1 121 store i32 %newval2, i32* @var_i32 122 %cmp_pos_big = icmp ult i32 %val2, 14610432 123 br i1 %cmp_pos_big, label %ret, label %test3 124 125 test3: 126 ; CHECK: cmp {{w[0-9]+}}, #123 127 ; CHECK: b.lt [[RET]] 128 %newval3 = add i32 %val, 2 129 store i32 %newval3, i32* @var_i32 130 %cmp_pos_slt = icmp slt i32 %val, 123 131 br i1 %cmp_pos_slt, label %ret, label %test4 132 133 test4: 134 ; CHECK: cmp {{w[0-9]+}}, #321 135 ; CHECK: b.gt [[RET]] 136 %newval4 = add i32 %val, 3 137 store i32 %newval4, i32* @var_i32 138 %cmp_pos_sgt = icmp sgt i32 %val2, 321 139 br i1 %cmp_pos_sgt, label %ret, label %test5 140 141 test5: 142 ; CHECK: cmn {{w[0-9]+}}, #444 143 ; CHECK: b.gt [[RET]] 144 %newval5 = add i32 %val, 4 145 store i32 %newval5, i32* @var_i32 146 %cmp_neg_uge = icmp sgt i32 %val2, -444 147 br i1 %cmp_neg_uge, label %ret, label %test6 148 149 test6: 150 %newval6 = add i32 %val, 5 151 store i32 %newval6, i32* @var_i32 152 ret void 153 154 ret: 155 ret void 156 } 157 ; TODO: adds/subs 158
