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, !tbaa !0 12 %dec = add i64 %0, -1 13 store i64 %dec, i64* %refcnt, align 8, !tbaa !0 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, !tbaa !0 37 %dec.i = add nsw i64 %0, -1 38 store i64 %dec.i, i64* @c, align 8, !tbaa !0 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, !tbaa !3 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, !tbaa !0 51 %dec.i = add nsw i64 %0, -1 52 store i64 %dec.i, i64* @c, align 8, !tbaa !0 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, !tbaa !3 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 !0 = metadata !{metadata !"long", metadata !1} 65 !1 = metadata !{metadata !"omnipotent char", metadata !2} 66 !2 = metadata !{metadata !"Simple C/C++ TBAA", null} 67 !3 = metadata !{metadata !"int", metadata !1} 68 69 %struct.obj2 = type { i64, i32, i16, i8 } 70 71 declare void @other(%struct.obj2* ) nounwind; 72 73 ; CHECK: example_dec 74 define void @example_dec(%struct.obj2* %o) nounwind uwtable ssp { 75 ; 64 bit dec 76 entry: 77 %s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0 78 ; CHECK-NOT: load 79 %0 = load i64* %s64, align 8 80 ; CHECK: decq ({{.*}}) 81 %dec = add i64 %0, -1 82 store i64 %dec, i64* %s64, align 8 83 %tobool = icmp eq i64 %dec, 0 84 br i1 %tobool, label %if.end, label %return 85 86 ; 32 bit dec 87 if.end: 88 %s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1 89 ; CHECK-NOT: load 90 %1 = load i32* %s32, align 4 91 ; CHECK: decl {{[0-9][0-9]*}}({{.*}}) 92 %dec1 = add i32 %1, -1 93 store i32 %dec1, i32* %s32, align 4 94 %tobool2 = icmp eq i32 %dec1, 0 95 br i1 %tobool2, label %if.end1, label %return 96 97 ; 16 bit dec 98 if.end1: 99 %s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2 100 ; CHECK-NOT: load 101 %2 = load i16* %s16, align 2 102 ; CHECK: decw {{[0-9][0-9]*}}({{.*}}) 103 %dec2 = add i16 %2, -1 104 store i16 %dec2, i16* %s16, align 2 105 %tobool3 = icmp eq i16 %dec2, 0 106 br i1 %tobool3, label %if.end2, label %return 107 108 ; 8 bit dec 109 if.end2: 110 %s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3 111 ; CHECK-NOT: load 112 %3 = load i8* %s8 113 ; CHECK: decb {{[0-9][0-9]*}}({{.*}}) 114 %dec3 = add i8 %3, -1 115 store i8 %dec3, i8* %s8 116 %tobool4 = icmp eq i8 %dec3, 0 117 br i1 %tobool4, label %if.end4, label %return 118 119 if.end4: 120 tail call void @other(%struct.obj2* %o) nounwind 121 br label %return 122 123 return: ; preds = %if.end4, %if.end, %entry 124 ret void 125 } 126 127 ; CHECK: example_inc 128 define void @example_inc(%struct.obj2* %o) nounwind uwtable ssp { 129 ; 64 bit inc 130 entry: 131 %s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0 132 ; CHECK-NOT: load 133 %0 = load i64* %s64, align 8 134 ; CHECK: incq ({{.*}}) 135 %inc = add i64 %0, 1 136 store i64 %inc, i64* %s64, align 8 137 %tobool = icmp eq i64 %inc, 0 138 br i1 %tobool, label %if.end, label %return 139 140 ; 32 bit inc 141 if.end: 142 %s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1 143 ; CHECK-NOT: load 144 %1 = load i32* %s32, align 4 145 ; CHECK: incl {{[0-9][0-9]*}}({{.*}}) 146 %inc1 = add i32 %1, 1 147 store i32 %inc1, i32* %s32, align 4 148 %tobool2 = icmp eq i32 %inc1, 0 149 br i1 %tobool2, label %if.end1, label %return 150 151 ; 16 bit inc 152 if.end1: 153 %s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2 154 ; CHECK-NOT: load 155 %2 = load i16* %s16, align 2 156 ; CHECK: incw {{[0-9][0-9]*}}({{.*}}) 157 %inc2 = add i16 %2, 1 158 store i16 %inc2, i16* %s16, align 2 159 %tobool3 = icmp eq i16 %inc2, 0 160 br i1 %tobool3, label %if.end2, label %return 161 162 ; 8 bit inc 163 if.end2: 164 %s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3 165 ; CHECK-NOT: load 166 %3 = load i8* %s8 167 ; CHECK: incb {{[0-9][0-9]*}}({{.*}}) 168 %inc3 = add i8 %3, 1 169 store i8 %inc3, i8* %s8 170 %tobool4 = icmp eq i8 %inc3, 0 171 br i1 %tobool4, label %if.end4, label %return 172 173 if.end4: 174 tail call void @other(%struct.obj2* %o) nounwind 175 br label %return 176 177 return: 178 ret void 179 } 180 181 ; Deal with TokenFactor chain 182 ; rdar://11236106 183 @foo = external global i64*, align 8 184 185 define void @test3() nounwind ssp { 186 entry: 187 ; CHECK: test3: 188 ; CHECK: decq 16(%rax) 189 %0 = load i64** @foo, align 8 190 %arrayidx = getelementptr inbounds i64* %0, i64 2 191 %1 = load i64* %arrayidx, align 8 192 %dec = add i64 %1, -1 193 store i64 %dec, i64* %arrayidx, align 8 194 %cmp = icmp eq i64 %dec, 0 195 br i1 %cmp, label %if.then, label %if.end 196 197 if.then: 198 tail call void @baz() nounwind 199 br label %if.end 200 201 if.end: 202 ret void 203 } 204 205 declare void @baz() 206 207 ; Avoid creating a cycle in the DAG which would trigger an assert in the 208 ; scheduler. 209 ; PR12565 210 ; rdar://11451474 211 @x = external global i32, align 4 212 @y = external global i32, align 4 213 @z = external global i32, align 4 214 215 define void @test4() nounwind uwtable ssp { 216 entry: 217 %0 = load i32* @x, align 4 218 %1 = load i32* @y, align 4 219 %dec = add nsw i32 %1, -1 220 store i32 %dec, i32* @y, align 4 221 %tobool.i = icmp ne i32 %dec, 0 222 %cond.i = select i1 %tobool.i, i32 %0, i32 0 223 store i32 %cond.i, i32* @z, align 4 224 ret void 225 } 226
