1 ; RUN: opt < %s -passes='default<O0>' -enable-coroutines -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: [[IGEP:%.+]] = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 4
34 ; CHECK: [[XGEP:%.+]] = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 6
36 ; CHECK: call void @llvm.dbg.declare(metadata i32* [[IGEP]], metadata ![[IVAR:[0-9]+]], metadata !DIExpression()), !dbg ![[IDBGLOC:[0-9]+]]
37 ; CHECK: call void @llvm.dbg.declare(metadata [10 x i32]* [[XGEP]], metadata ![[XVAR:[0-9]+]], metadata !DIExpression()), !dbg ![[IDBGLOC]]
39 ; CHECK: call void @llvm.dbg.declare(metadata i32* %j, metadata ![[JVAR:[0-9]+]], metadata !DIExpression()), !dbg ![[JDBGLOC:[0-9]+]]
41 ; CHECK-LABEL: define internal fastcc void @f.resume({{.*}}) {
42 ; CHECK: entry.resume:
43 ; CHECK-NEXT: %[[DBG_PTR:.*]] = alloca %f.Frame*
44 ; CHECK-NEXT: call void @llvm.dbg.declare(metadata %f.Frame** %[[DBG_PTR]], metadata ![[XVAR_RESUME:[0-9]+]], metadata !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 32)), !dbg
45 ; CHECK-NEXT: call void @llvm.dbg.declare(metadata %f.Frame** %[[DBG_PTR]], metadata ![[IVAR_RESUME:[0-9]+]], metadata !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 20)), !dbg ![[IDBGLOC_RESUME:[0-9]+]]
46 ; CHECK-NEXT: store %f.Frame* {{.*}}, %f.Frame** %[[DBG_PTR]]
47 ; CHECK: %[[J:.*]] = alloca i32, align 4
48 ; CHECK-NEXT: call void @llvm.dbg.declare(metadata i32* %[[J]], metadata ![[JVAR_RESUME:[0-9]+]], metadata !DIExpression()), !dbg ![[JDBGLOC_RESUME:[0-9]+]]
52 ; CHECK: ![[IVAR]] = !DILocalVariable(name: "i"
53 ; CHECK: ![[SCOPE:[0-9]+]] = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)
54 ; CHECK: ![[IDBGLOC]] = !DILocation(line: 24, column: 7, scope: ![[SCOPE]])
55 ; CHECK: ![[XVAR]] = !DILocalVariable(name: "x"
56 ; CHECK: ![[JVAR]] = !DILocalVariable(name: "j"
57 ; CHECK: ![[JDBGLOC]] = !DILocation(line: 32, column: 7, scope: ![[SCOPE]])
59 ; CHECK: ![[XVAR_RESUME]] = !DILocalVariable(name: "x"
60 ; CHECK: ![[IDBGLOC_RESUME]] = !DILocation(line: 24, column: 7, scope: ![[RESUME_SCOPE:[0-9]+]])
61 ; CHECK: ![[RESUME_SCOPE]] = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)
62 ; CHECK: ![[IVAR_RESUME]] = !DILocalVariable(name: "i"
63 ; CHECK: ![[JVAR_RESUME]] = !DILocalVariable(name: "j"
64 ; CHECK: ![[JDBGLOC_RESUME]] = !DILocation(line: 32, column: 7, scope: ![[RESUME_SCOPE]])
67 %__promise = alloca i8, align 8
68 %i = alloca i32, align 4
69 %j = alloca i32, align 4
70 %x = alloca [10 x i32], align 16
71 %id = call token @llvm.coro.id(i32 16, i8* %__promise, i8* null, i8* null)
72 %alloc = call i1 @llvm.coro.alloc(token %id)
73 br i1 %alloc, label %coro.alloc, label %coro.init
75 coro.alloc: ; preds = %entry
76 %size = call i64 @llvm.coro.size.i64()
77 %memory = call i8* @new(i64 %size)
80 coro.init: ; preds = %coro.alloc, %entry
81 %phi.entry.alloc = phi i8* [ null, %entry ], [ %memory, %coro.alloc ]
82 %begin = call i8* @llvm.coro.begin(token %id, i8* %phi.entry.alloc)
83 %ready = call i1 @await_ready()
84 br i1 %ready, label %init.ready, label %init.suspend
86 init.suspend: ; preds = %coro.init
87 %save = call token @llvm.coro.save(i8* null)
88 call void @await_suspend()
89 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)
90 switch i8 %suspend, label %coro.ret [
91 i8 0, label %init.ready
92 i8 1, label %init.cleanup
95 init.cleanup: ; preds = %init.suspend
98 init.ready: ; preds = %init.suspend, %coro.init
99 call void @await_resume()
100 call void @llvm.dbg.declare(metadata i32* %i, metadata !6, metadata !DIExpression()), !dbg !11
101 store i32 0, i32* %i, align 4
102 %i.init.ready.load = load i32, i32* %i, align 4
103 %i.init.ready.inc = add nsw i32 %i.init.ready.load, 1
104 store i32 %i.init.ready.inc, i32* %i, align 4
105 call void @llvm.dbg.declare(metadata [10 x i32]* %x, metadata !14, metadata !DIExpression()), !dbg !11
106 %memset = bitcast [10 x i32]* %x to i8*, !dbg !11
107 call void @llvm.memset.p0i8.i64(i8* align 16 %memset, i8 0, i64 40, i1 false), !dbg !11
108 %i.init.ready.reload = load i32, i32* %i, align 4
109 call void @print(i32 %i.init.ready.reload)
110 %ready.again = call zeroext i1 @await_ready()
111 br i1 %ready.again, label %await.ready, label %await.suspend
113 await.suspend: ; preds = %init.ready
114 %save.again = call token @llvm.coro.save(i8* null)
115 %from.address = call i8* @from_address(i8* %begin)
116 call void @await_suspend()
117 %suspend.again = call i8 @llvm.coro.suspend(token %save.again, i1 false)
118 switch i8 %suspend.again, label %coro.ret [
119 i8 0, label %await.ready
120 i8 1, label %await.cleanup
123 await.cleanup: ; preds = %await.suspend
126 await.ready: ; preds = %await.suspend, %init.ready
127 call void @await_resume()
128 call void @llvm.dbg.declare(metadata i32* %j, metadata !12, metadata !DIExpression()), !dbg !13
129 store i32 0, i32* %j, align 4
130 %arrayidx0 = getelementptr inbounds [10 x i32], [10 x i32]* %x, i64 0, i64 0, !dbg !18
131 store i32 1, i32* %arrayidx0, align 16, !dbg !19
132 %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* %x, i64 0, i64 1, !dbg !20
133 store i32 2, i32* %arrayidx1, align 4, !dbg !21
134 %i.await.ready.load = load i32, i32* %i, align 4
135 %i.await.ready.inc = add nsw i32 %i.await.ready.load, 1
136 store i32 %i.await.ready.inc, i32* %i, align 4
137 %j.await.ready.load = load i32, i32* %j, align 4
138 %j.await.ready.inc = add nsw i32 %j.await.ready.load, 1
139 store i32 %j.await.ready.inc, i32* %j, align 4
140 %i.await.ready.reload = load i32, i32* %i, align 4
141 call void @print(i32 %i.await.ready.reload)
142 %j.await.ready.reload = load i32, i32* %j, align 4
143 call void @print(i32 %j.await.ready.reload)
144 call void @return_void()
147 coro.final: ; preds = %await.ready
148 call void @final_suspend()
149 %coro.final.await_ready = call i1 @await_ready()
150 br i1 %coro.final.await_ready, label %final.ready, label %final.suspend
152 final.suspend: ; preds = %coro.final
153 %final.suspend.coro.save = call token @llvm.coro.save(i8* null)
154 %final.suspend.from_address = call i8* @from_address(i8* %begin)
155 call void @await_suspend()
156 %final.suspend.coro.suspend = call i8 @llvm.coro.suspend(token %final.suspend.coro.save, i1 true)
157 switch i8 %final.suspend.coro.suspend, label %coro.ret [
158 i8 0, label %final.ready
159 i8 1, label %final.cleanup
162 final.cleanup: ; preds = %final.suspend
165 final.ready: ; preds = %final.suspend, %coro.final
166 call void @await_resume()
169 cleanup: ; preds = %final.ready, %final.cleanup, %await.cleanup, %init.cleanup
170 %cleanup.dest.slot.0 = phi i32 [ 0, %final.ready ], [ 2, %final.cleanup ], [ 2, %await.cleanup ], [ 2, %init.cleanup ]
171 %free.memory = call i8* @llvm.coro.free(token %id, i8* %begin)
172 %free = icmp ne i8* %free.memory, null
173 br i1 %free, label %coro.free, label %after.coro.free
175 coro.free: ; preds = %cleanup
176 call void @delete(i8* %free.memory)
177 br label %after.coro.free
179 after.coro.free: ; preds = %coro.free, %cleanup
180 switch i32 %cleanup.dest.slot.0, label %unreachable [
181 i32 0, label %cleanup.cont
182 i32 2, label %coro.ret
185 cleanup.cont: ; preds = %after.coro.free
188 coro.ret: ; preds = %cleanup.cont, %after.coro.free, %final.suspend, %await.suspend, %init.suspend
189 %end = call i1 @llvm.coro.end(i8* null, i1 false)
192 unreachable: ; preds = %after.coro.free
196 declare void @llvm.dbg.declare(metadata, metadata, metadata)
197 declare token @llvm.coro.id(i32, i8* readnone, i8* nocapture readonly, i8*)
198 declare i1 @llvm.coro.alloc(token)
199 declare i64 @llvm.coro.size.i64()
200 declare token @llvm.coro.save(i8*)
201 declare i8* @llvm.coro.begin(token, i8* writeonly)
202 declare i8 @llvm.coro.suspend(token, i1)
203 declare i8* @llvm.coro.free(token, i8* nocapture readonly)
204 declare i1 @llvm.coro.end(i8*, i1)
206 declare i8* @new(i64)
207 declare void @delete(i8*)
208 declare i1 @await_ready()
209 declare void @await_suspend()
210 declare void @await_resume()
211 declare void @print(i32)
212 declare i8* @from_address(i8*)
213 declare void @return_void()
214 declare void @final_suspend()
216 declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg)
219 !llvm.linker.options = !{}
220 !llvm.module.flags = !{!3, !4}
223 !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)
224 !1 = !DIFile(filename: "repro.cpp", directory: ".")
226 !3 = !{i32 7, !"Dwarf Version", i32 4}
227 !4 = !{i32 2, !"Debug Info Version", i32 3}
228 !5 = !{!"clang version 11.0.0"}
229 !6 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 24, type: !10)
230 !7 = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)
231 !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)
232 !9 = !DISubroutineType(types: !2)
233 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
234 !11 = !DILocation(line: 24, column: 7, scope: !7)
235 !12 = !DILocalVariable(name: "j", scope: !7, file: !1, line: 32, type: !10)
236 !13 = !DILocation(line: 32, column: 7, scope: !7)
237 !14 = !DILocalVariable(name: "x", scope: !22, file: !1, line: 34, type: !15)
238 !15 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 320, elements: !16)
240 !17 = !DISubrange(count: 10)
241 !18 = !DILocation(line: 42, column: 3, scope: !7)
242 !19 = !DILocation(line: 42, column: 8, scope: !7)
243 !20 = !DILocation(line: 43, column: 3, scope: !7)
244 !21 = !DILocation(line: 43, column: 8, scope: !7)
245 !22 = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)