1; RUN: opt -debug-pass-manager -aa-pipeline=basic-aa -passes='require<phi-values>,memcpyopt,instcombine' -disable-output < %s 2>&1 | FileCheck %s
2
3; Check that phi values is not run when it's not already available, and that
4; basicaa is not freed after a pass that preserves CFG, as it preserves CFG.
5
6; CHECK-DAG: Running analysis: PhiValuesAnalysis
7; CHECK-DAG: Running analysis: BasicAA
8; CHECK-DAG: Running analysis: MemorySSA
9; CHECK: Running pass: MemCpyOptPass
10; CHECK-NOT: Invalidating analysis
11; CHECK: Running pass: InstCombinePass
12
13target datalayout = "p:8:8-n8"
14
15declare void @otherfn([4 x i8]*)
16declare i32 @__gxx_personality_v0(...)
17declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
18@c = external global i8*, align 1
19
20; This function is one where if we didn't free basicaa after memcpyopt then the
21; usage of basicaa in instcombine would cause a segfault due to stale phi-values
22; results being used.
23define void @fn(i8* %this, i64* %ptr) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
24entry:
25  %arr = alloca [4 x i8], align 8
26  %gep1 = getelementptr inbounds [4 x i8], [4 x i8]* %arr, i64 0, i32 0
27  br i1 undef, label %then, label %if
28
29if:
30  br label %then
31
32then:
33  %phi = phi i64* [ %ptr, %if ], [ null, %entry ]
34  store i8 1, i8* %gep1, align 8
35  %load = load i64, i64* %phi, align 8
36  %gep2 = getelementptr inbounds i8, i8* undef, i64 %load
37  %gep3 = getelementptr inbounds i8, i8* %gep2, i64 40
38  invoke i32 undef(i8* undef)
39     to label %invoke unwind label %lpad
40
41invoke:
42  unreachable
43
44lpad:
45  landingpad { i8*, i32 }
46     catch i8* null
47  call void @otherfn([4 x i8]* nonnull %arr)
48  unreachable
49}
50
51; When running instcombine after memdep, the basicaa used by instcombine uses
52; the phivalues that memdep used. This would then cause a segfault due to
53; instcombine deleting a phi whose values had been cached.
54define void @fn2() {
55entry:
56  %a = alloca i8, align 1
57  %0 = load i8*, i8** @c, align 1
58  %1 = bitcast i8* %0 to i8**
59  br label %for.cond
60
61for.cond:                                         ; preds = %for.body, %entry
62  %d.0 = phi i8** [ %1, %entry ], [ null, %for.body ]
63  br i1 undef, label %for.body, label %for.cond.cleanup
64
65for.body:                                         ; preds = %for.cond
66  store volatile i8 undef, i8* %a, align 1
67  br label %for.cond
68
69for.cond.cleanup:                                 ; preds = %for.cond
70  call void @llvm.lifetime.end.p0i8(i64 1, i8* %a)
71  %2 = load i8*, i8** %d.0, align 1
72  store i8* %2, i8** @c, align 1
73  ret void
74}
75