1; Test that SCEV gets invalidated when one of its dependencies is invalidated.
2;
3; Each of the RUNs checks that the pass manager runs SCEV, then invalidates it
4; due to a dependency being invalidated, and then re-urns it. This will
5; directly fail and indicates a failure that would occur later if we ddidn't
6; invalidate SCEV in this way.
7
8target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
9target triple = "x86_64-unknown-linux-gnu"
10
11; RUN: opt < %s -passes='require<scalar-evolution>,invalidate<domtree>,print<scalar-evolution>' \
12; RUN:     -debug-pass-manager -disable-output 2>&1 \
13; RUN:     | FileCheck %s -check-prefixes=CHECK,CHECK-DT-INVALIDATE
14;
15; CHECK-DT-INVALIDATE: Running pass: RequireAnalysisPass
16; CHECK-DT-INVALIDATE: Running analysis: ScalarEvolutionAnalysis
17; CHECK-DT-INVALIDATE: Running analysis: DominatorTreeAnalysis
18; CHECK-DT-INVALIDATE: Running pass: InvalidateAnalysisPass
19; CHECK-DT-INVALIDATE: Invalidating analysis: DominatorTreeAnalysis
20; CHECK-DT-INVALIDATE: Running pass: ScalarEvolutionPrinterPass
21; CHECK-DT-INVALIDATE: Running analysis: ScalarEvolutionAnalysis
22; CHECK-DT-INVALIDATE: Running analysis: DominatorTreeAnalysis
23
24; RUN: opt < %s -passes='require<scalar-evolution>,invalidate<loops>,print<scalar-evolution>' \
25; RUN:     -debug-pass-manager -disable-output 2>&1 \
26; RUN:     | FileCheck %s -check-prefixes=CHECK,CHECK-LI-INVALIDATE
27;
28; CHECK-LI-INVALIDATE: Running pass: RequireAnalysisPass
29; CHECK-LI-INVALIDATE: Running analysis: ScalarEvolutionAnalysis
30; CHECK-LI-INVALIDATE: Running analysis: LoopAnalysis
31; CHECK-LI-INVALIDATE: Running pass: InvalidateAnalysisPass
32; CHECK-LI-INVALIDATE: Invalidating analysis: LoopAnalysis
33; CHECK-LI-INVALIDATE: Running pass: ScalarEvolutionPrinterPass
34; CHECK-LI-INVALIDATE: Running analysis: ScalarEvolutionAnalysis
35; CHECK-LI-INVALIDATE: Running analysis: LoopAnalysis
36
37; This test isn't particularly interesting, its just enough to make sure we
38; actually do some work inside of SCEV so that if we regress here despite the
39; debug pass printing continuing to match, ASan and other tools can catch it.
40define void @test(i32 %n) {
41; CHECK-LABEL: Classifying expressions for: @test
42; CHECK: Loop %loop: backedge-taken count is 14
43; CHECK: Loop %loop: max backedge-taken count is 14
44; CHECK: Loop %loop: Predicated backedge-taken count is 14
45
46entry:
47  br label %loop
48
49loop:
50  %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
51  %iv.inc = add nsw i32 %iv, 3
52  %becond = icmp ne i32 %iv.inc, 46
53  br i1 %becond, label %loop, label %leave
54
55leave:
56  ret void
57}
58