1 ; RUN: opt < %s -passes='function(coro-early),cgscc(coro-split,coro-split),function(sroa)' --reuse-storage-in-coroutine-frame -S | FileCheck %s
3 ; Checks whether the dbg.declare for `__promise` remains valid under O2.
5 ; CHECK-LABEL: define internal fastcc void @f.resume({{.*}})
7 ; CHECK: call void @llvm.dbg.declare(metadata %f.Frame* %FramePtr, metadata ![[PROMISEVAR_RESUME:[0-9]+]], metadata !DIExpression(
9 ; CHECK: ![[PROMISEVAR_RESUME]] = !DILocalVariable(name: "__promise"
10 %promise_type = type { i32, i32, double }
12 define void @f() !dbg !8 {
14 %__promise = alloca %promise_type, align 8
15 %0 = bitcast %promise_type* %__promise to i8*
16 %id = call token @llvm.coro.id(i32 16, i8* %0, i8* null, i8* null)
17 %alloc = call i1 @llvm.coro.alloc(token %id)
18 br i1 %alloc, label %coro.alloc, label %coro.init
20 coro.alloc: ; preds = %entry
21 %size = call i64 @llvm.coro.size.i64()
22 %memory = call i8* @new(i64 %size)
25 coro.init: ; preds = %coro.alloc, %entry
26 %phi.entry.alloc = phi i8* [ null, %entry ], [ %memory, %coro.alloc ]
27 %begin = call i8* @llvm.coro.begin(token %id, i8* %phi.entry.alloc)
28 call void @llvm.dbg.declare(metadata %promise_type* %__promise, metadata !6, metadata !DIExpression()), !dbg !18
29 %i.i = getelementptr inbounds %promise_type, %promise_type* %__promise, i64 0, i32 0
30 store i32 1, i32* %i.i, align 8
31 %j.i = getelementptr inbounds %promise_type, %promise_type* %__promise, i64 0, i32 1
32 store i32 2, i32* %j.i, align 4
33 %k.i = getelementptr inbounds %promise_type, %promise_type* %__promise, i64 0, i32 2
34 store double 3.000000e+00, double* %k.i, align 8
35 %ready = call i1 @await_ready()
36 br i1 %ready, label %init.ready, label %init.suspend
38 init.suspend: ; preds = %coro.init
39 %save = call token @llvm.coro.save(i8* null)
40 call void @await_suspend()
41 %suspend = call i8 @llvm.coro.suspend(token %save, i1 false)
42 switch i8 %suspend, label %coro.ret [
43 i8 0, label %init.ready
44 i8 1, label %init.cleanup
47 init.cleanup: ; preds = %init.suspend
50 init.ready: ; preds = %init.suspend, %coro.init
51 call void @await_resume()
52 %ready.again = call zeroext i1 @await_ready()
53 br i1 %ready.again, label %await.ready, label %await.suspend
55 await.suspend: ; preds = %init.ready
56 %save.again = call token @llvm.coro.save(i8* null)
57 %from.address = call i8* @from_address(i8* %begin)
58 call void @await_suspend()
59 %suspend.again = call i8 @llvm.coro.suspend(token %save.again, i1 false)
60 switch i8 %suspend.again, label %coro.ret [
61 i8 0, label %await.ready
62 i8 1, label %await.cleanup
65 await.cleanup: ; preds = %await.suspend
68 await.ready: ; preds = %await.suspend, %init.ready
69 call void @await_resume()
70 call void @return_void()
73 coro.final: ; preds = %await.ready
74 call void @final_suspend()
75 %coro.final.await_ready = call i1 @await_ready()
76 br i1 %coro.final.await_ready, label %final.ready, label %final.suspend
78 final.suspend: ; preds = %coro.final
79 %final.suspend.coro.save = call token @llvm.coro.save(i8* null)
80 %final.suspend.from_address = call i8* @from_address(i8* %begin)
81 call void @await_suspend()
82 %final.suspend.coro.suspend = call i8 @llvm.coro.suspend(token %final.suspend.coro.save, i1 true)
83 switch i8 %final.suspend.coro.suspend, label %coro.ret [
84 i8 0, label %final.ready
85 i8 1, label %final.cleanup
88 final.cleanup: ; preds = %final.suspend
91 final.ready: ; preds = %final.suspend, %coro.final
92 call void @await_resume()
95 cleanup: ; preds = %final.ready, %final.cleanup, %await.cleanup, %init.cleanup
96 %cleanup.dest.slot.0 = phi i32 [ 0, %final.ready ], [ 2, %final.cleanup ], [ 2, %await.cleanup ], [ 2, %init.cleanup ]
97 %free.memory = call i8* @llvm.coro.free(token %id, i8* %begin)
98 %free = icmp ne i8* %free.memory, null
99 br i1 %free, label %coro.free, label %after.coro.free
101 coro.free: ; preds = %cleanup
102 call void @delete(i8* %free.memory)
103 br label %after.coro.free
105 after.coro.free: ; preds = %coro.free, %cleanup
106 switch i32 %cleanup.dest.slot.0, label %unreachable [
107 i32 0, label %cleanup.cont
108 i32 2, label %coro.ret
111 cleanup.cont: ; preds = %after.coro.free
114 coro.ret: ; preds = %cleanup.cont, %after.coro.free, %final.suspend, %await.suspend, %init.suspend
115 %end = call i1 @llvm.coro.end(i8* null, i1 false)
118 unreachable: ; preds = %after.coro.free
123 declare void @llvm.dbg.declare(metadata, metadata, metadata)
124 declare token @llvm.coro.id(i32, i8* readnone, i8* nocapture readonly, i8*)
125 declare i1 @llvm.coro.alloc(token)
126 declare i64 @llvm.coro.size.i64()
127 declare token @llvm.coro.save(i8*)
128 declare i8* @llvm.coro.begin(token, i8* writeonly)
129 declare i8 @llvm.coro.suspend(token, i1)
130 declare i8* @llvm.coro.free(token, i8* nocapture readonly)
131 declare i1 @llvm.coro.end(i8*, i1)
133 declare i8* @new(i64)
134 declare void @delete(i8*)
135 declare i1 @await_ready()
136 declare void @await_suspend()
137 declare void @await_resume()
138 declare void @print(i32)
139 declare i8* @from_address(i8*)
140 declare void @return_void()
141 declare void @final_suspend()
144 !llvm.linker.options = !{}
145 !llvm.module.flags = !{!3, !4}
148 !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)
149 !1 = !DIFile(filename: "coro-debug.cpp", directory: ".")
151 !3 = !{i32 7, !"Dwarf Version", i32 4}
152 !4 = !{i32 2, !"Debug Info Version", i32 3}
153 !5 = !{!"clang version 11.0.0"}
154 !6 = !DILocalVariable(name: "__promise", scope: !7, file: !1, line: 24, type: !10)
155 !7 = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)
156 !8 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !8, file: !1, line: 23, type: !9, scopeLine: 23, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
157 !9 = !DISubroutineType(types: !2)
158 !10 = !DIDerivedType(tag: DW_TAG_typedef, name: "promise_type", scope: !8, file: !1, line: 15, baseType: !11)
159 !11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "promise_type", scope: !8, file: !1, line: 10, size: 128, flags: DIFlagTypePassByValue | DIFlagNonTrivial, elements: !12, identifier: "_ZTSN4coro12promise_typeE")
160 !12 = !{!13, !14, !15}
161 !13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !8, file: !1, line: 10, baseType: !16, size: 32)
162 !14 = !DIDerivedType(tag: DW_TAG_member, name: "j", scope: !8, file: !1, line: 10, baseType: !16, size: 32, offset: 32)
163 !15 = !DIDerivedType(tag: DW_TAG_member, name: "k", scope: !8, file: !1, line: 10, baseType: !17, size: 64, offset: 64)
164 !16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
165 !17 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
166 !18 = !DILocation(line: 0, scope: !7)