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1; RUN: opt -debugify -loop-simplify -loop-extract -S < %s | FileCheck %s
2
3; This tests 2 cases:
4; 1. loop1 should be extracted into a function, without extracting %v1 alloca.
5; 2. loop2 should be extracted into a function, with the %v2 alloca.
6;
7; This used to produce an invalid IR, where `memcpy` will have a reference to
8; the, now, external value (local to the extracted loop function).
9
10; CHECK-LABEL: define void @test()
11; CHECK-NEXT: entry:
12; CHECK-NEXT:   %v1 = alloca i32
13; CHECK-NEXT:   call void @llvm.dbg.value(metadata i32* %v1
14; CHECK-NEXT:   %p1 = bitcast i32* %v1 to i8*
15; CHECK-NEXT:   call void @llvm.dbg.value(metadata i8* %p1,
16; CHECK-NEXT:   call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 undef, i8* %p1, i64 4, i1 true)
17
18; CHECK-LABEL: define internal void @test.loop2()
19; CHECK-NEXT: newFuncRoot:
20; CHECK-NEXT:   %v2 = alloca i32
21; CHECK-NEXT:   %p2 = bitcast i32* %v2 to i8*
22
23; CHECK-LABEL: define internal void @test.loop1(i8* %p1)
24; CHECK-NEXT: newFuncRoot:
25; CHECK-NEXT:   br
26
27define void @test() {
28entry:
29  %v1 = alloca i32, align 4
30  %v2 = alloca i32, align 4
31  %p1 = bitcast i32* %v1 to i8*
32  %p2 = bitcast i32* %v2 to i8*
33  call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 undef, i8* %p1, i64 4, i1 true)
34  br label %loop1
35
36loop1:
37  call void @llvm.lifetime.start.p0i8(i64 4, i8* %p1)
38  %r1 = call i32 @foo(i8* %p1)
39  call void @llvm.lifetime.end.p0i8(i64 4, i8* %p1)
40  %cmp1 = icmp ne i32 %r1, 0
41  br i1 %cmp1, label %loop1, label %loop2
42
43loop2:
44  call void @llvm.lifetime.start.p0i8(i64 4, i8* %p2)
45  %r2 = call i32 @foo(i8* %p2)
46  call void @llvm.lifetime.end.p0i8(i64 4, i8* %p2)
47  %cmp2 = icmp ne i32 %r2, 0
48  br i1 %cmp2, label %loop2, label %exit
49
50exit:
51  ret void
52}
53
54declare i32 @foo(i8*)
55
56declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
57declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
58declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
59