1; RUN: opt -debug-pass=Executions -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 freed after a pass that preserves CFG.
5
6; CHECK: Executing Pass 'Phi Values Analysis'
7; CHECK: Executing Pass 'Basic Alias Analysis (stateless AA impl)'
8; CHECK: Executing Pass 'Memory Dependence Analysis'
9; CHECK: Executing Pass 'MemCpy Optimization'
10; CHECK-DAG: Freeing Pass 'MemCpy Optimization'
11; CHECK-DAG: Freeing Pass 'Phi Values Analysis'
12; CHECK-DAG: Freeing Pass 'Memory Dependence Analysis'
13; CHECK-DAG: Freeing Pass 'Basic Alias Analysis (stateless AA impl)'
14; CHECK-NOT: Executing Pass 'Phi Values Analysis'
15; CHECK: Executing Pass 'Basic Alias Analysis (stateless AA impl)'
16; CHECK: Executing Pass 'Combine redundant instructions'
17
18declare void @otherfn([4 x i8]*)
19declare i32 @__gxx_personality_v0(...)
20
21; This function is one where if we didn't free basicaa after memcpyopt then the
22; usage of basicaa in instcombine would cause a segfault due to stale phi-values
23; results being used.
24define void @fn(i8* %this, i64* %ptr) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
25entry:
26  %arr = alloca [4 x i8], align 8
27  %gep1 = getelementptr inbounds [4 x i8], [4 x i8]* %arr, i64 0, i32 0
28  br i1 undef, label %then, label %if
29
30if:
31  br label %then
32
33then:
34  %phi = phi i64* [ %ptr, %if ], [ null, %entry ]
35  store i8 1, i8* %gep1, align 8
36  %load = load i64, i64* %phi, align 8
37  %gep2 = getelementptr inbounds i8, i8* undef, i64 %load
38  %gep3 = getelementptr inbounds i8, i8* %gep2, i64 40
39  invoke i32 undef(i8* undef)
40     to label %invoke unwind label %lpad
41
42invoke:
43  unreachable
44
45lpad:
46  landingpad { i8*, i32 }
47     catch i8* null
48  call void @otherfn([4 x i8]* nonnull %arr)
49  unreachable
50}
51