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1; RUN: opt < %s -O0 -S | FileCheck --check-prefixes=CHECK %s2 3target datalayout = "p:64:64:64"4 5%async.task = type { i64 }6%async.actor = type { i64 }7%async.fp = type <{ i32, i32 }>8 9%async.ctxt = type { ptr, ptr }10 11; The async callee.12@my_other_async_function_fp = external global <{ i32, i32 }>13declare void @my_other_async_function(ptr %async.ctxt)14 15@my_async_function_fp = constant <{ i32, i32 }>16 <{ i32 trunc ( ; Relative pointer to async function17 i64 sub (18 i64 ptrtoint (ptr @my_async_function to i64),19 i64 ptrtoint (ptr getelementptr inbounds (<{ i32, i32 }>, ptr @my_async_function_fp, i32 0, i32 1) to i64)20 )21 to i32),22 i32 128 ; Initial async context size without space for frame23}>24 25define swiftcc void @my_other_async_function_fp.apply(ptr %fnPtr, ptr %async.ctxt) {26 tail call swiftcc void %fnPtr(ptr %async.ctxt)27 ret void28}29 30declare void @escape(ptr)31declare void @store_resume(ptr)32define ptr @resume_context_projection(ptr %ctxt) {33entry:34 %resume_ctxt = load ptr, ptr %ctxt, align 835 ret ptr %resume_ctxt36}37 38; The address of alloca escapes but the analysis based on lifetimes fails to see39; that it can't localize this alloca.40; CHECK: define swiftcc void @my_async_function(ptr swiftasync %async.ctxt) {41; CHECK: entry:42; CHECK-NOT: ret43; CHECK-NOT: [[ESCAPED_ADDR:%.*]] = alloca i64, align 844; CHECK: ret45define swiftcc void @my_async_function(ptr swiftasync %async.ctxt) {46entry:47 %escaped_addr = alloca i6448 49 %id = call token @llvm.coro.id.async(i32 128, i32 16, i32 0,50 ptr @my_async_function_fp)51 %hdl = call ptr @llvm.coro.begin(token %id, ptr null)52 call void @llvm.lifetime.start.p0(ptr %escaped_addr)53 call void @escape(ptr %escaped_addr)54 br label %callblock55 56 57callblock:58 59 %callee_context = call ptr @context_alloc()60 61 %resume.func_ptr = call ptr @llvm.coro.async.resume()62 call void @store_resume(ptr %resume.func_ptr)63 %res = call {ptr, ptr, ptr} (i32, ptr, ptr, ...) @llvm.coro.suspend.async(i32 0,64 ptr %resume.func_ptr,65 ptr @resume_context_projection,66 ptr @my_other_async_function_fp.apply,67 ptr @asyncSuspend, ptr %callee_context)68 br label %callblock69}70 71declare { ptr, ptr, ptr, ptr } @llvm.coro.suspend.async.sl_p0i8p0i8p0i8p0i8s(i32, ptr, ptr, ...)72declare ptr @llvm.coro.prepare.async(ptr)73declare token @llvm.coro.id.async(i32, i32, i32, ptr)74declare ptr @llvm.coro.begin(token, ptr)75declare void @llvm.coro.end.async(ptr, i1, ...)76declare void @llvm.coro.end(ptr, i1, token)77declare {ptr, ptr, ptr} @llvm.coro.suspend.async(i32, ptr, ptr, ...)78declare ptr @context_alloc()79declare void @llvm.coro.async.context.dealloc(ptr)80declare swiftcc void @asyncSuspend(ptr)81declare ptr @llvm.coro.async.resume()82declare void @llvm.coro.async.size.replace(ptr, ptr)83declare void @llvm.lifetime.start.p0(ptr nocapture) #084declare void @llvm.lifetime.end.p0(ptr nocapture) #085attributes #0 = { argmemonly nofree nosync nounwind willreturn }86