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 i8* @f(i1 %n) "coroutine.presplit"="1" {
8 br i1 %n, label %flag_true, label %flag_false
11 %x.alias1 = bitcast i64* %x to i32*
15 %x.alias2 = bitcast i64* %x to i32*
19 %alias_phi = phi i32* [ %x.alias1, %flag_true ], [ %x.alias2, %flag_false ]
20 %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
21 %size = call i32 @llvm.coro.size.i32()
22 %alloc = call i8* @malloc(i32 %size)
23 %hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)
24 %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
25 switch i8 %sp1, label %suspend [i8 0, label %resume
28 call void @print(i32* %alias_phi)
32 %mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
33 call void @free(i8* %mem)
37 call i1 @llvm.coro.end(i8* %hdl, i1 0)
41 ; both %x and %alias_phi would go to the frame.
42 ; CHECK: %f.Frame = type { void (%f.Frame*)*, void (%f.Frame*)*, i64, i32*, i1 }
44 ; CHECK: store void (%f.Frame*)* @f.destroy, void (%f.Frame*)** %destroy.addr
45 ; CHECK-NEXT: %0 = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 2
46 ; CHECK-NEXT: %1 = bitcast i64* %0 to i8*
47 ; CHECK-NEXT: %2 = bitcast i8* %1 to i32*
48 ; CHECK: %alias_phi.spill.addr = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 3
49 ; CHECK-NEXT: store i32* %2, i32** %alias_phi.spill.addr
51 declare i8* @llvm.coro.free(token, i8*)
52 declare i32 @llvm.coro.size.i32()
53 declare i8 @llvm.coro.suspend(token, i1)
54 declare void @llvm.coro.resume(i8*)
55 declare void @llvm.coro.destroy(i8*)
57 declare token @llvm.coro.id(i32, i8*, i8*, i8*)
58 declare i1 @llvm.coro.alloc(token)
59 declare i8* @llvm.coro.begin(token, i8*)
60 declare i1 @llvm.coro.end(i8*, i1)
62 declare void @print(i32*)
63 declare noalias i8* @malloc(i32)
64 declare void @free(i8*)