1 ; Tests that CoroSplit can succesfully determine allocas should live on the frame
2 ; if their aliases are used across suspension points through PHINode.
3 ; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
5 define ptr @f(i1 %n) presplitcoroutine {
8 br i1 %n, label %flag_true, label %flag_false
17 %alias_phi = phi ptr [ %x, %flag_true ], [ %x, %flag_false ]
18 %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
19 %size = call i32 @llvm.coro.size.i32()
20 %alloc = call ptr @malloc(i32 %size)
21 %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
22 %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
23 switch i8 %sp1, label %suspend [i8 0, label %resume
26 call void @print(ptr %alias_phi)
30 %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
31 call void @free(ptr %mem)
35 call i1 @llvm.coro.end(ptr %hdl, i1 0, token none)
39 ; both %x and %alias_phi would go to the frame.
40 ; CHECK: %f.Frame = type { ptr, ptr, i64, ptr, i1 }
42 ; CHECK: store ptr @f.destroy, ptr %destroy.addr
43 ; CHECK-NEXT: %0 = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 2
44 ; CHECK: %alias_phi.spill.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 3
45 ; CHECK-NEXT: store ptr %0, ptr %alias_phi.spill.addr
47 declare ptr @llvm.coro.free(token, ptr)
48 declare i32 @llvm.coro.size.i32()
49 declare i8 @llvm.coro.suspend(token, i1)
50 declare void @llvm.coro.resume(ptr)
51 declare void @llvm.coro.destroy(ptr)
53 declare token @llvm.coro.id(i32, ptr, ptr, ptr)
54 declare i1 @llvm.coro.alloc(token)
55 declare ptr @llvm.coro.begin(token, ptr)
56 declare i1 @llvm.coro.end(ptr, i1, token)
58 declare void @print(ptr)
59 declare noalias ptr @malloc(i32)
60 declare void @free(ptr)