1 ; RUN: opt < %s -passes='default<O0>' -S | FileCheck %s
3 ; Define a function 'f' that resembles the Clang frontend's output for the
4 ; following C++ coroutine:
10 ; print(i); // Prints '1'
12 ; co_await suspend_always();
18 ; print(i); // Prints '2'
20 ; print(j); // Prints '1'
21 ; print(x); // Print '1'
24 ; The CHECKs verify that dbg.declare intrinsics are created for the coroutine
25 ; funclet 'f.resume', and that they reference the address of the variables on
26 ; the coroutine frame. The debug locations for the original function 'f' are
27 ; static (!11 and !13), whereas the coroutine funclet will have its own new
28 ; ones with identical line and column numbers.
30 ; CHECK-LABEL: define void @f() {{.*}} {
32 ; CHECK: %j = alloca i32, align 4
33 ; CHECK: call void @llvm.dbg.declare(metadata ptr %j, metadata ![[JVAR:[0-9]+]], metadata !DIExpression()), !dbg ![[JDBGLOC:[0-9]+]]
34 ; CHECK: %[[MEMORY:.*]] = call ptr @new
35 ; CHECK: call void @llvm.dbg.declare(metadata ptr %[[MEMORY]], metadata ![[XVAR:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 32)), !dbg ![[IDBGLOC:[0-9]+]]
36 ; CHECK: call void @llvm.dbg.declare(metadata ptr %[[MEMORY]], metadata ![[IVAR:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 20)), !dbg ![[IDBGLOC]]
39 ; CHECK-LABEL: define internal fastcc void @f.resume({{.*}}) {{.*}} {
40 ; CHECK: entry.resume:
41 ; CHECK-NEXT: %[[DBG_PTR:.*]] = alloca ptr
42 ; CHECK-NEXT: call void @llvm.dbg.declare(metadata ptr %[[DBG_PTR]], metadata ![[XVAR_RESUME:[0-9]+]], metadata !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 32)), !dbg
43 ; CHECK-NEXT: call void @llvm.dbg.declare(metadata ptr %[[DBG_PTR]], metadata ![[IVAR_RESUME:[0-9]+]], metadata !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 20)), !dbg ![[IDBGLOC_RESUME:[0-9]+]]
44 ; CHECK-NEXT: store ptr {{.*}}, ptr %[[DBG_PTR]]
45 ; CHECK: %[[J:.*]] = alloca i32, align 4
46 ; CHECK-NEXT: call void @llvm.dbg.declare(metadata ptr %[[J]], metadata ![[JVAR_RESUME:[0-9]+]], metadata !DIExpression()), !dbg ![[JDBGLOC_RESUME:[0-9]+]]
50 ; CHECK-DAG: ![[IVAR]] = !DILocalVariable(name: "i"
51 ; CHECK-DAG: ![[SCOPE:[0-9]+]] = distinct !DILexicalBlock(scope: !6, file: !1, line: 23, column: 12)
52 ; CHECK-DAG: ![[IDBGLOC]] = !DILocation(line: 24, column: 7, scope: ![[SCOPE]])
53 ; CHECK-DAG: ![[XVAR]] = !DILocalVariable(name: "x"
54 ; CHECK-DAG: ![[JVAR]] = !DILocalVariable(name: "j"
55 ; CHECK-DAG: ![[JDBGLOC]] = !DILocation(line: 32, column: 7, scope: ![[SCOPE]])
57 ; CHECK-DAG: ![[XVAR_RESUME]] = !DILocalVariable(name: "x"
58 ; CHECK-DAG: ![[IDBGLOC_RESUME]] = !DILocation(line: 24, column: 7, scope: ![[RESUME_SCOPE:[0-9]+]])
59 ; CHECK-DAG: ![[RESUME_SCOPE]] = distinct !DILexicalBlock(scope: !22, file: !1, line: 23, column: 12)
60 ; CHECK-DAG: ![[IVAR_RESUME]] = !DILocalVariable(name: "i"
61 ; CHECK-DAG: ![[JVAR_RESUME]] = !DILocalVariable(name: "j"
62 ; CHECK-DAG: ![[JDBGLOC_RESUME]] = !DILocation(line: 32, column: 7, scope: ![[RESUME_SCOPE]])
63 define void @f() presplitcoroutine !dbg !8 {
65 %__promise = alloca i8, align 8
66 %i = alloca i32, align 4
67 %j = alloca i32, align 4
68 %x = alloca [10 x i32], align 16
69 %id = call token @llvm.coro.id(i32 16, ptr %__promise, ptr null, ptr null)
70 %alloc = call i1 @llvm.coro.alloc(token %id)
71 br i1 %alloc, label %coro.alloc, label %coro.init
73 coro.alloc: ; preds = %entry
74 %size = call i64 @llvm.coro.size.i64()
75 %memory = call ptr @new(i64 %size)
78 coro.init: ; preds = %coro.alloc, %entry
79 %phi.entry.alloc = phi ptr [ null, %entry ], [ %memory, %coro.alloc ]
80 %begin = call ptr @llvm.coro.begin(token %id, ptr %phi.entry.alloc)
81 %ready = call i1 @await_ready()
82 br i1 %ready, label %init.ready, label %init.suspend
84 init.suspend: ; preds = %coro.init
85 %save = call token @llvm.coro.save(ptr null)
86 call void @await_suspend()
87 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)
88 switch i8 %suspend, label %coro.ret [
89 i8 0, label %init.ready
90 i8 1, label %init.cleanup
93 init.cleanup: ; preds = %init.suspend
96 init.ready: ; preds = %init.suspend, %coro.init
97 call void @await_resume()
98 call void @llvm.dbg.declare(metadata ptr %i, metadata !6, metadata !DIExpression()), !dbg !11
99 store i32 0, ptr %i, align 4
100 %i.init.ready.load = load i32, ptr %i, align 4
101 %i.init.ready.inc = add nsw i32 %i.init.ready.load, 1
102 store i32 %i.init.ready.inc, ptr %i, align 4
103 call void @llvm.dbg.declare(metadata ptr %x, metadata !14, metadata !DIExpression()), !dbg !11
104 call void @llvm.memset.p0.i64(ptr align 16 %x, i8 0, i64 40, i1 false), !dbg !11
105 %i.init.ready.reload = load i32, ptr %i, align 4
106 call void @print(i32 %i.init.ready.reload)
107 %ready.again = call zeroext i1 @await_ready()
108 br i1 %ready.again, label %await.ready, label %await.suspend
110 await.suspend: ; preds = %init.ready
111 %save.again = call token @llvm.coro.save(ptr null)
112 %from.address = call ptr @from_address(ptr %begin)
113 call void @await_suspend()
114 %suspend.again = call i8 @llvm.coro.suspend(token %save.again, i1 false)
115 switch i8 %suspend.again, label %coro.ret [
116 i8 0, label %await.ready
117 i8 1, label %await.cleanup
120 await.cleanup: ; preds = %await.suspend
123 await.ready: ; preds = %await.suspend, %init.ready
124 call void @await_resume()
125 call void @llvm.dbg.declare(metadata ptr %j, metadata !12, metadata !DIExpression()), !dbg !13
126 store i32 0, ptr %j, align 4
127 store i32 1, ptr %x, align 16, !dbg !19
128 %arrayidx1 = getelementptr inbounds [10 x i32], ptr %x, i64 0, i64 1, !dbg !20
129 store i32 2, ptr %arrayidx1, align 4, !dbg !21
130 %i.await.ready.load = load i32, ptr %i, align 4
131 %i.await.ready.inc = add nsw i32 %i.await.ready.load, 1
132 store i32 %i.await.ready.inc, ptr %i, align 4
133 %j.await.ready.load = load i32, ptr %j, align 4
134 %j.await.ready.inc = add nsw i32 %j.await.ready.load, 1
135 store i32 %j.await.ready.inc, ptr %j, align 4
136 %i.await.ready.reload = load i32, ptr %i, align 4
137 call void @print(i32 %i.await.ready.reload)
138 %j.await.ready.reload = load i32, ptr %j, align 4
139 call void @print(i32 %j.await.ready.reload)
140 call void @return_void()
143 coro.final: ; preds = %await.ready
144 call void @final_suspend()
145 %coro.final.await_ready = call i1 @await_ready()
146 br i1 %coro.final.await_ready, label %final.ready, label %final.suspend
148 final.suspend: ; preds = %coro.final
149 %final.suspend.coro.save = call token @llvm.coro.save(ptr null)
150 %final.suspend.from_address = call ptr @from_address(ptr %begin)
151 call void @await_suspend()
152 %final.suspend.coro.suspend = call i8 @llvm.coro.suspend(token %final.suspend.coro.save, i1 true)
153 switch i8 %final.suspend.coro.suspend, label %coro.ret [
154 i8 0, label %final.ready
155 i8 1, label %final.cleanup
158 final.cleanup: ; preds = %final.suspend
161 final.ready: ; preds = %final.suspend, %coro.final
162 call void @await_resume()
165 cleanup: ; preds = %final.ready, %final.cleanup, %await.cleanup, %init.cleanup
166 %cleanup.dest.slot.0 = phi i32 [ 0, %final.ready ], [ 2, %final.cleanup ], [ 2, %await.cleanup ], [ 2, %init.cleanup ]
167 %free.memory = call ptr @llvm.coro.free(token %id, ptr %begin)
168 %free = icmp ne ptr %free.memory, null
169 br i1 %free, label %coro.free, label %after.coro.free
171 coro.free: ; preds = %cleanup
172 call void @delete(ptr %free.memory)
173 br label %after.coro.free
175 after.coro.free: ; preds = %coro.free, %cleanup
176 switch i32 %cleanup.dest.slot.0, label %unreachable [
177 i32 0, label %cleanup.cont
178 i32 2, label %coro.ret
181 cleanup.cont: ; preds = %after.coro.free
184 coro.ret: ; preds = %cleanup.cont, %after.coro.free, %final.suspend, %await.suspend, %init.suspend
185 %end = call i1 @llvm.coro.end(ptr null, i1 false, token none)
188 unreachable: ; preds = %after.coro.free
192 declare void @llvm.dbg.declare(metadata, metadata, metadata)
193 declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr)
194 declare i1 @llvm.coro.alloc(token)
195 declare i64 @llvm.coro.size.i64()
196 declare token @llvm.coro.save(ptr)
197 declare ptr @llvm.coro.begin(token, ptr writeonly)
198 declare i8 @llvm.coro.suspend(token, i1)
199 declare ptr @llvm.coro.free(token, ptr nocapture readonly)
200 declare i1 @llvm.coro.end(ptr, i1, token)
202 declare ptr @new(i64)
203 declare void @delete(ptr)
204 declare i1 @await_ready()
205 declare void @await_suspend()
206 declare void @await_resume()
207 declare void @print(i32)
208 declare ptr @from_address(ptr)
209 declare void @return_void()
210 declare void @final_suspend()
212 declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
215 !llvm.linker.options = !{}
216 !llvm.module.flags = !{!3, !4}
219 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, splitDebugInlining: false, nameTableKind: None)
220 !1 = !DIFile(filename: "repro.cpp", directory: ".")
222 !3 = !{i32 7, !"Dwarf Version", i32 4}
223 !4 = !{i32 2, !"Debug Info Version", i32 3}
224 !5 = !{!"clang version 11.0.0"}
225 !6 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 24, type: !10)
226 !7 = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)
227 !8 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 23, type: !9, scopeLine: 23, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
228 !9 = !DISubroutineType(types: !2)
229 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
230 !11 = !DILocation(line: 24, column: 7, scope: !7)
231 !12 = !DILocalVariable(name: "j", scope: !7, file: !1, line: 32, type: !10)
232 !13 = !DILocation(line: 32, column: 7, scope: !7)
233 !14 = !DILocalVariable(name: "x", scope: !22, file: !1, line: 34, type: !15)
234 !15 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 320, elements: !16)
236 !17 = !DISubrange(count: 10)
237 !18 = !DILocation(line: 42, column: 3, scope: !7)
238 !19 = !DILocation(line: 42, column: 8, scope: !7)
239 !20 = !DILocation(line: 43, column: 3, scope: !7)
240 !21 = !DILocation(line: 43, column: 8, scope: !7)
241 !22 = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)