1 ; RUN: opt < %s -enable-coroutines -passes='default<O0>' -S | FileCheck --check-prefixes=CHECK %s
2 ; RUN: opt < %s -enable-coroutines -O0 -S | FileCheck --check-prefixes=CHECK %s
4 target datalayout = "p:64:64:64"
6 %async.task = type { i64 }
7 %async.actor = type { i64 }
8 %async.fp = type <{ i32, i32 }>
10 %async.ctxt = type { i8*, void (i8*, %async.task*, %async.actor*)* }
13 @my_other_async_function_fp = external global <{ i32, i32 }>
14 declare void @my_other_async_function(i8* %async.ctxt)
16 @my_async_function_fp = constant <{ i32, i32 }>
17 <{ i32 trunc ( ; Relative pointer to async function
19 i64 ptrtoint (void (i8*)* @my_async_function to i64),
20 i64 ptrtoint (i32* getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @my_async_function_fp, i32 0, i32 1) to i64)
23 i32 128 ; Initial async context size without space for frame
26 define swiftcc void @my_other_async_function_fp.apply(i8* %fnPtr, i8* %async.ctxt) {
27 %callee = bitcast i8* %fnPtr to void(i8*)*
28 tail call swiftcc void %callee(i8* %async.ctxt)
32 declare void @escape(i64*)
33 declare void @store_resume(i8*)
34 declare i1 @exitLoop()
35 define i8* @resume_context_projection(i8* %ctxt) {
37 %resume_ctxt_addr = bitcast i8* %ctxt to i8**
38 %resume_ctxt = load i8*, i8** %resume_ctxt_addr, align 8
42 define swiftcc void @my_async_function(i8* swiftasync %async.ctxt) {
44 %escaped_addr = alloca i64
46 %id = call token @llvm.coro.id.async(i32 128, i32 16, i32 0,
47 i8* bitcast (<{i32, i32}>* @my_async_function_fp to i8*))
48 %hdl = call i8* @llvm.coro.begin(token %id, i8* null)
49 %ltb = bitcast i64* %escaped_addr to i8*
50 call void @llvm.lifetime.start.p0i8(i64 4, i8* %ltb)
56 %callee_context = call i8* @context_alloc()
58 %resume.func_ptr = call i8* @llvm.coro.async.resume()
59 call void @store_resume(i8* %resume.func_ptr)
60 %resume_proj_fun = bitcast i8*(i8*)* @resume_context_projection to i8*
61 %callee = bitcast void(i8*)* @asyncSuspend to i8*
62 %res = call {i8*, i8*, i8*} (i32, i8*, i8*, ...) @llvm.coro.suspend.async(i32 0,
65 void (i8*, i8*)* @my_other_async_function_fp.apply,
66 i8* %callee, i8* %callee_context)
67 call void @escape(i64* %escaped_addr)
68 %exitCond = call i1 @exitLoop()
70 ;; We used to move the lifetime.start intrinsic here =>
71 ;; This exposes two bugs:
72 ; 1.) The code should use the basic block start not end as insertion point
73 ; More problematically:
74 ; 2.) The code marks the stack object as not alive for part of the loop.
76 br i1 %exitCond, label %loop_exit, label %loop
77 %res2 = call {i8*, i8*, i8*} (i32, i8*, i8*, ...) @llvm.coro.suspend.async(i32 0,
80 void (i8*, i8*)* @my_other_async_function_fp.apply,
81 i8* %callee, i8* %callee_context)
83 %exitCond2 = call i1 @exitLoop()
84 br i1 %exitCond2, label %loop_exit, label %loop
90 call void @llvm.lifetime.end.p0i8(i64 4, i8* %ltb)
91 call i1 (i8*, i1, ...) @llvm.coro.end.async(i8* %hdl, i1 false)
95 ; CHECK: define {{.*}} void @my_async_function.resume.0(
96 ; CHECK-NOT: call void @llvm.lifetime.start.p0i8(i64 4, i8* %3)
97 ; CHECK: br i1 %exitCond, label %loop_exit, label %loop
101 declare { i8*, i8*, i8*, i8* } @llvm.coro.suspend.async.sl_p0i8p0i8p0i8p0i8s(i32, i8*, i8*, ...)
102 declare i8* @llvm.coro.prepare.async(i8*)
103 declare token @llvm.coro.id.async(i32, i32, i32, i8*)
104 declare i8* @llvm.coro.begin(token, i8*)
105 declare i1 @llvm.coro.end.async(i8*, i1, ...)
106 declare i1 @llvm.coro.end(i8*, i1)
107 declare {i8*, i8*, i8*} @llvm.coro.suspend.async(i32, i8*, i8*, ...)
108 declare i8* @context_alloc()
109 declare void @llvm.coro.async.context.dealloc(i8*)
110 declare swiftcc void @asyncSuspend(i8*)
111 declare i8* @llvm.coro.async.resume()
112 declare void @llvm.coro.async.size.replace(i8*, i8*)
113 declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #0
114 declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #0
115 attributes #0 = { argmemonly nofree nosync nounwind willreturn }