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" {
9 %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
10 %size = call i32 @llvm.coro.size.i32()
11 %alloc = call i8* @malloc(i32 %size)
12 %hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)
13 br i1 %n, label %flag_true, label %flag_false
16 %x.alias = bitcast i64* %x to i32*
20 %y.alias = bitcast i64* %y to i32*
24 %alias_phi = phi i32* [ %x.alias, %flag_true ], [ %y.alias, %flag_false ]
25 %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
26 switch i8 %sp1, label %suspend [i8 0, label %resume
29 call void @print(i32* %alias_phi)
33 %mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
34 call void @free(i8* %mem)
38 call i1 @llvm.coro.end(i8* %hdl, i1 0)
42 ; both %x and %y, as well as %alias_phi would all go to the frame.
43 ; CHECK: %f.Frame = type { void (%f.Frame*)*, void (%f.Frame*)*, i64, i64, i32*, i1 }
45 ; CHECK: %x.reload.addr = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 2
46 ; CHECK: %y.reload.addr = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 3
47 ; CHECK: %x.alias = bitcast i64* %x.reload.addr to i32*
48 ; CHECK: %y.alias = bitcast i64* %y.reload.addr to i32*
49 ; CHECK: %alias_phi = select i1 %n, i32* %x.alias, i32* %y.alias
50 ; CHECK: %alias_phi.spill.addr = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 4
51 ; CHECK: store i32* %alias_phi, i32** %alias_phi.spill.addr, align 8
53 declare i8* @llvm.coro.free(token, i8*)
54 declare i32 @llvm.coro.size.i32()
55 declare i8 @llvm.coro.suspend(token, i1)
56 declare void @llvm.coro.resume(i8*)
57 declare void @llvm.coro.destroy(i8*)
59 declare token @llvm.coro.id(i32, i8*, i8*, i8*)
60 declare i1 @llvm.coro.alloc(token)
61 declare i8* @llvm.coro.begin(token, i8*)
62 declare i1 @llvm.coro.end(i8*, i1)
64 declare void @print(i32*)
65 declare noalias i8* @malloc(i32)
66 declare void @free(i8*)