1 ; RUN: llc < %s -march=x86-64 | FileCheck %s 2 3 %struct.obj = type { i64 } 4 5 ; CHECK: _Z7releaseP3obj 6 define void @_Z7releaseP3obj(%struct.obj* nocapture %o) nounwind uwtable ssp { 7 entry: 8 ; CHECK: decq (%{{rdi|rcx}}) 9 ; CHECK-NEXT: je 10 %refcnt = getelementptr inbounds %struct.obj* %o, i64 0, i32 0 11 %0 = load i64* %refcnt, align 8 12 %dec = add i64 %0, -1 13 store i64 %dec, i64* %refcnt, align 8 14 %tobool = icmp eq i64 %dec, 0 15 br i1 %tobool, label %if.end, label %return 16 17 if.end: ; preds = %entry 18 %1 = bitcast %struct.obj* %o to i8* 19 tail call void @free(i8* %1) 20 br label %return 21 22 return: ; preds = %entry, %if.end 23 ret void 24 } 25 26 @c = common global i64 0, align 8 27 @a = common global i32 0, align 4 28 @.str = private unnamed_addr constant [5 x i8] c"%ld\0A\00", align 1 29 @b = common global i32 0, align 4 30 31 ; CHECK: test 32 define i32 @test() nounwind uwtable ssp { 33 entry: 34 ; CHECK: decq 35 ; CHECK-NOT: decq 36 %0 = load i64* @c, align 8 37 %dec.i = add nsw i64 %0, -1 38 store i64 %dec.i, i64* @c, align 8 39 %tobool.i = icmp ne i64 %dec.i, 0 40 %lor.ext.i = zext i1 %tobool.i to i32 41 store i32 %lor.ext.i, i32* @a, align 4 42 %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind 43 ret i32 0 44 } 45 46 ; CHECK: test2 47 define i32 @test2() nounwind uwtable ssp { 48 entry: 49 ; CHECK-NOT: decq ({{.*}}) 50 %0 = load i64* @c, align 8 51 %dec.i = add nsw i64 %0, -1 52 store i64 %dec.i, i64* @c, align 8 53 %tobool.i = icmp ne i64 %0, 0 54 %lor.ext.i = zext i1 %tobool.i to i32 55 store i32 %lor.ext.i, i32* @a, align 4 56 %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind 57 ret i32 0 58 } 59 60 declare i32 @printf(i8* nocapture, ...) nounwind 61 62 declare void @free(i8* nocapture) nounwind 63 64 %struct.obj2 = type { i64, i32, i16, i8 } 65 66 declare void @other(%struct.obj2* ) nounwind; 67 68 ; CHECK: example_dec 69 define void @example_dec(%struct.obj2* %o) nounwind uwtable ssp { 70 ; 64 bit dec 71 entry: 72 %s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0 73 ; CHECK-NOT: load 74 %0 = load i64* %s64, align 8 75 ; CHECK: decq ({{.*}}) 76 %dec = add i64 %0, -1 77 store i64 %dec, i64* %s64, align 8 78 %tobool = icmp eq i64 %dec, 0 79 br i1 %tobool, label %if.end, label %return 80 81 ; 32 bit dec 82 if.end: 83 %s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1 84 ; CHECK-NOT: load 85 %1 = load i32* %s32, align 4 86 ; CHECK: decl {{[0-9][0-9]*}}({{.*}}) 87 %dec1 = add i32 %1, -1 88 store i32 %dec1, i32* %s32, align 4 89 %tobool2 = icmp eq i32 %dec1, 0 90 br i1 %tobool2, label %if.end1, label %return 91 92 ; 16 bit dec 93 if.end1: 94 %s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2 95 ; CHECK-NOT: load 96 %2 = load i16* %s16, align 2 97 ; CHECK: decw {{[0-9][0-9]*}}({{.*}}) 98 %dec2 = add i16 %2, -1 99 store i16 %dec2, i16* %s16, align 2 100 %tobool3 = icmp eq i16 %dec2, 0 101 br i1 %tobool3, label %if.end2, label %return 102 103 ; 8 bit dec 104 if.end2: 105 %s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3 106 ; CHECK-NOT: load 107 %3 = load i8* %s8 108 ; CHECK: decb {{[0-9][0-9]*}}({{.*}}) 109 %dec3 = add i8 %3, -1 110 store i8 %dec3, i8* %s8 111 %tobool4 = icmp eq i8 %dec3, 0 112 br i1 %tobool4, label %if.end4, label %return 113 114 if.end4: 115 tail call void @other(%struct.obj2* %o) nounwind 116 br label %return 117 118 return: ; preds = %if.end4, %if.end, %entry 119 ret void 120 } 121 122 ; CHECK: example_inc 123 define void @example_inc(%struct.obj2* %o) nounwind uwtable ssp { 124 ; 64 bit inc 125 entry: 126 %s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0 127 ; CHECK-NOT: load 128 %0 = load i64* %s64, align 8 129 ; CHECK: incq ({{.*}}) 130 %inc = add i64 %0, 1 131 store i64 %inc, i64* %s64, align 8 132 %tobool = icmp eq i64 %inc, 0 133 br i1 %tobool, label %if.end, label %return 134 135 ; 32 bit inc 136 if.end: 137 %s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1 138 ; CHECK-NOT: load 139 %1 = load i32* %s32, align 4 140 ; CHECK: incl {{[0-9][0-9]*}}({{.*}}) 141 %inc1 = add i32 %1, 1 142 store i32 %inc1, i32* %s32, align 4 143 %tobool2 = icmp eq i32 %inc1, 0 144 br i1 %tobool2, label %if.end1, label %return 145 146 ; 16 bit inc 147 if.end1: 148 %s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2 149 ; CHECK-NOT: load 150 %2 = load i16* %s16, align 2 151 ; CHECK: incw {{[0-9][0-9]*}}({{.*}}) 152 %inc2 = add i16 %2, 1 153 store i16 %inc2, i16* %s16, align 2 154 %tobool3 = icmp eq i16 %inc2, 0 155 br i1 %tobool3, label %if.end2, label %return 156 157 ; 8 bit inc 158 if.end2: 159 %s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3 160 ; CHECK-NOT: load 161 %3 = load i8* %s8 162 ; CHECK: incb {{[0-9][0-9]*}}({{.*}}) 163 %inc3 = add i8 %3, 1 164 store i8 %inc3, i8* %s8 165 %tobool4 = icmp eq i8 %inc3, 0 166 br i1 %tobool4, label %if.end4, label %return 167 168 if.end4: 169 tail call void @other(%struct.obj2* %o) nounwind 170 br label %return 171 172 return: 173 ret void 174 } 175 176 ; Deal with TokenFactor chain 177 ; rdar://11236106 178 @foo = external global i64*, align 8 179 180 define void @test3() nounwind ssp { 181 entry: 182 ; CHECK-LABEL: test3: 183 ; CHECK: decq 16(%rax) 184 %0 = load i64** @foo, align 8 185 %arrayidx = getelementptr inbounds i64* %0, i64 2 186 %1 = load i64* %arrayidx, align 8 187 %dec = add i64 %1, -1 188 store i64 %dec, i64* %arrayidx, align 8 189 %cmp = icmp eq i64 %dec, 0 190 br i1 %cmp, label %if.then, label %if.end 191 192 if.then: 193 tail call void @baz() nounwind 194 br label %if.end 195 196 if.end: 197 ret void 198 } 199 200 declare void @baz() 201 202 ; Avoid creating a cycle in the DAG which would trigger an assert in the 203 ; scheduler. 204 ; PR12565 205 ; rdar://11451474 206 @x = external global i32, align 4 207 @y = external global i32, align 4 208 @z = external global i32, align 4 209 210 define void @test4() nounwind uwtable ssp { 211 entry: 212 %0 = load i32* @x, align 4 213 %1 = load i32* @y, align 4 214 %dec = add nsw i32 %1, -1 215 store i32 %dec, i32* @y, align 4 216 %tobool.i = icmp ne i32 %dec, 0 217 %cond.i = select i1 %tobool.i, i32 %0, i32 0 218 store i32 %cond.i, i32* @z, align 4 219 ret void 220 } 221
