xref: /llvm-project/llvm/test/Analysis/DependenceAnalysis/lcssa.ll (revision 46f9cddfd7e40998422d1e34a3f1193210ee2fb8)
1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
2; RUN: opt < %s -disable-output "-passes=print<da>"                            \
3; RUN: "-aa-pipeline=basic-aa,tbaa" 2>&1 | FileCheck %s
4
5define void @f(ptr %a, i32 %n, i64 %n2) {
6; CHECK-LABEL: 'f'
7; CHECK-NEXT:  Src: %v = load i32, ptr %arrayidx1, align 4 --> Dst: %v = load i32, ptr %arrayidx1, align 4
8; CHECK-NEXT:    da analyze - none!
9; CHECK-NEXT:  Src: %v = load i32, ptr %arrayidx1, align 4 --> Dst: store i32 %add, ptr %a.lcssa, align 4
10; CHECK-NEXT:    da analyze - anti [*|<]!
11; CHECK-NEXT:  Src: store i32 %add, ptr %a.lcssa, align 4 --> Dst: store i32 %add, ptr %a.lcssa, align 4
12; CHECK-NEXT:    da analyze - consistent output [S]!
13;
14entry:
15  br label %while.body
16
17while.body:
18  %n.addr = phi i32 [ %mul, %while.body ], [ %n, %entry ]
19  %inc.phi = phi i32 [ %inc, %while.body ], [ 0, %entry ]
20  %mul = mul i32 %n.addr, 3
21  %div = udiv i32 %mul, 2
22  %inc = add i32 %inc.phi, 1
23  %incdec.ptr = getelementptr inbounds i32, ptr %a, i32 %inc
24  %cmp.not = icmp eq i32 %div, 1
25  br i1 %cmp.not, label %while.end, label %while.body
26
27while.end:
28  %a.lcssa = phi ptr [ %incdec.ptr, %while.body ]
29  br label %for.body
30
31for.body:
32  %indvars.iv = phi i64 [ 1, %while.end ], [ %indvars.iv.next, %for.body ]
33  %arrayidx1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
34  %v = load i32, ptr %arrayidx1, align 4
35  %add = add nsw i32 %v, 1
36  store i32 %add, ptr %a.lcssa, align 4
37  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
38  %exitcond.not = icmp eq i64 %indvars.iv.next, %n2
39  br i1 %exitcond.not, label %ret, label %for.body
40
41ret:
42  ret void
43}
44