xref: /llvm-project/llvm/test/Transforms/Coroutines/coro-alloca-outside-frame.ll (revision 34415fd611e2d92da570bc4adf931a6410fb406e) 
1; Tests that CoroSplit can succesfully skip allocas that shall not live on the frame
2; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S -o %t.ll
3; RUN: FileCheck --input-file=%t.ll %s
4
5define ptr @f(i1 %n) presplitcoroutine {
6entry:
7  %x = alloca i64, !coro.outside.frame !{}
8  %y = alloca i64
9  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
10  %size = call i32 @llvm.coro.size.i32()
11  %alloc = call ptr @malloc(i32 %size)
12  %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
13  br i1 %n, label %flag_true, label %flag_false
14
15flag_true:
16  br label %merge
17
18flag_false:
19  br label %merge
20
21merge:
22  %alias_phi = phi ptr [ %x, %flag_true ], [ %y, %flag_false ]
23  %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
24  switch i8 %sp1, label %suspend [i8 0, label %resume
25                                  i8 1, label %cleanup]
26resume:
27  call void @print(ptr %alias_phi)
28  br label %cleanup
29
30cleanup:
31  %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
32  call void @free(ptr %mem)
33  br label %suspend
34
35suspend:
36  call i1 @llvm.coro.end(ptr %hdl, i1 0, token none)
37  ret ptr %hdl
38}
39
40; %y and %alias_phi would all go to the frame, but not %x
41; CHECK:       %f.Frame = type { ptr, ptr, i64, ptr, i1 }
42; CHECK-LABEL: @f(
43; CHECK:         %x = alloca i64, align 8, !coro.outside.frame !0
44; CHECK-NOT:     %x.reload.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 2
45; CHECK:         %y.reload.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 2
46; CHECK:         %alias_phi = phi ptr [ %y.reload.addr, %merge.from.flag_false ], [ %x, %entry ]
47
48declare ptr @llvm.coro.free(token, ptr)
49declare i32 @llvm.coro.size.i32()
50declare i8  @llvm.coro.suspend(token, i1)
51declare void @llvm.coro.resume(ptr)
52declare void @llvm.coro.destroy(ptr)
53
54declare token @llvm.coro.id(i32, ptr, ptr, ptr)
55declare i1 @llvm.coro.alloc(token)
56declare ptr @llvm.coro.begin(token, ptr)
57declare i1 @llvm.coro.end(ptr, i1, token)
58
59declare void @print(ptr)
60declare noalias ptr @malloc(i32)
61declare void @free(ptr)