1; The IR below was crafted so as:
2; 1) To have a loop, so we create a loop pass manager
3; 2) To be "immutable" in the sense that no pass in the standard
4;    pipeline will modify it.
5; Since no transformations take place, we don't expect any analyses
6; to be invalidated.
7; Any invalidation that shows up here is a bug, unless we started modifying
8; the IR, in which case we need to make it immutable harder.
9;
10; Prelink pipelines:
11; RUN: opt -disable-verify -debug-pass-manager \
12; RUN:     -passes='thinlto-pre-link<O1>,name-anon-globals' -S %s 2>&1 \
13; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O1,CHECK-PRELINK-O,CHECK-PRELINK-O-NODIS,CHECK-PRELINK-O1
14; RUN: opt -disable-verify -debug-pass-manager \
15; RUN:     -passes='thinlto-pre-link<O2>,name-anon-globals' -S  %s 2>&1 \
16; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O2,CHECK-PRELINK-O,CHECK-PRELINK-O-NODIS,CHECK-PRELINK-O2
17; RUN: opt -disable-verify -debug-pass-manager \
18; RUN:     -passes='thinlto-pre-link<O3>,name-anon-globals' -S -passes-ep-pipeline-start='no-op-module' %s 2>&1 \
19; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O3,CHECK-PRELINK-O,CHECK-PRELINK-O-NODIS,CHECK-PRELINK-O3,CHECK-EP-PIPELINE-START
20; RUN: opt -disable-verify -debug-pass-manager \
21; RUN:     -passes='thinlto-pre-link<Os>,name-anon-globals' -S %s 2>&1 \
22; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-Os,CHECK-PRELINK-O,CHECK-PRELINK-O-NODIS,CHECK-PRELINK-Os
23; RUN: opt -disable-verify -debug-pass-manager \
24; RUN:     -passes='thinlto-pre-link<Oz>,name-anon-globals' -S %s 2>&1 \
25; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-Oz,CHECK-PRELINK-O,CHECK-PRELINK-O-NODIS,CHECK-PRELINK-Oz
26; RUN: opt -disable-verify -debug-pass-manager -new-pm-debug-info-for-profiling \
27; RUN:     -passes='thinlto-pre-link<O2>,name-anon-globals' -S  %s 2>&1 \
28; RUN:     | FileCheck %s --check-prefixes=CHECK-DIS,CHECK-O,CHECK-O2,CHECK-PRELINK-O,CHECK-PRELINK-O2
29;
30; Postlink pipelines:
31; RUN: opt -disable-verify -debug-pass-manager \
32; RUN:     -passes='thinlto<O1>' -S %s 2>&1 \
33; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O1,CHECK-POSTLINK-O,CHECK-POSTLINK-O1
34; RUN: opt -disable-verify -debug-pass-manager \
35; RUN:     -passes='thinlto<O2>' -S  %s 2>&1 \
36; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O2,CHECK-POSTLINK-O,CHECK-POSTLINK-O2
37; RUN: opt -disable-verify -debug-pass-manager -passes-ep-pipeline-start='no-op-module' \
38; RUN:     -passes='thinlto<O3>' -S  %s 2>&1 \
39; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O3,CHECK-POSTLINK-O,CHECK-POSTLINK-O3
40; RUN: opt -disable-verify -debug-pass-manager \
41; RUN:     -passes='thinlto<Os>' -S %s 2>&1 \
42; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-Os,CHECK-POSTLINK-O,CHECK-POSTLINK-Os
43; RUN: opt -disable-verify -debug-pass-manager \
44; RUN:     -passes='thinlto<Oz>' -S %s 2>&1 \
45; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-Oz,CHECK-POSTLINK-O,CHECK-POSTLINK-Oz
46; RUN: opt -disable-verify -debug-pass-manager -new-pm-debug-info-for-profiling \
47; RUN:     -passes='thinlto<O2>' -S  %s 2>&1 \
48; RUN:     | FileCheck %s --check-prefixes=CHECK-O,CHECK-O2,CHECK-POSTLINK-O,CHECK-POSTLINK-O2
49;
50; CHECK-O: Starting llvm::Module pass manager run.
51; CHECK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
52; CHECK-O-NEXT: Starting llvm::Module pass manager run.
53; CHECK-O-NEXT: Running pass: ForceFunctionAttrsPass
54; CHECK-EP-PIPELINE-START-NEXT: Running pass: NoOpModulePass
55; CHECK-DIS-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}AddDiscriminatorsPass{{.*}}>
56; CHECK-DIS-NEXT: Running analysis: InnerAnalysisManagerProxy
57; CHECK-POSTLINK-O-NEXT: Running pass: PGOIndirectCallPromotion
58; CHECK-POSTLINK-O-NEXT: Running analysis: ProfileSummaryAnalysis
59; CHECK-POSTLINK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
60; CHECK-POSTLINK-O-NEXT: Running analysis: OptimizationRemarkEmitterAnalysis
61; CHECK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
62; CHECK-O-NEXT: Starting llvm::Module pass manager run.
63; CHECK-O-NEXT: Running pass: InferFunctionAttrsPass
64; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
65; CHECK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
66; CHECK-PRELINK-O-NODIS-NEXT: Running analysis: InnerAnalysisManagerProxy
67; CHECK-O-NEXT: Starting llvm::Function pass manager run.
68; CHECK-O-NEXT: Running pass: SimplifyCFGPass
69; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
70; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
71; CHECK-O-NEXT: Running pass: SROA
72; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
73; CHECK-O-NEXT: Running pass: EarlyCSEPass
74; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
75; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
76; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
77; CHECK-O-NEXT: Finished llvm::Function pass manager run.
78; CHECK-O-NEXT: Running pass: IPSCCPPass
79; CHECK-O-NEXT: Running pass: CalledValuePropagationPass
80; CHECK-O-NEXT: Running pass: GlobalOptPass
81; CHECK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PromotePass>
82; CHECK-O-NEXT: Running pass: DeadArgumentEliminationPass
83; CHECK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
84; CHECK-O-NEXT: Starting llvm::Function pass manager run.
85; CHECK-O-NEXT: Running pass: InstCombinePass
86; CHECK-PRELINK-O-NEXT: Running analysis: OptimizationRemarkEmitterAnalysis
87; CHECK-O-NEXT: Running analysis: AAManager
88; CHECK-O-NEXT: Running pass: SimplifyCFGPass
89; CHECK-O-NEXT: Finished llvm::Function pass manager run.
90; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA
91; CHECK-O-NEXT: Running analysis: GlobalsAA
92; CHECK-O-NEXT: Running analysis: CallGraphAnalysis
93; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}ProfileSummaryAnalysis
94; CHECK-PRELINK-O-NEXT: Running analysis: ProfileSummaryAnalysis
95; CHECK-O-NEXT: Running pass: ModuleToPostOrderCGSCCPassAdaptor<{{.*}}LazyCallGraph{{.*}}>
96; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
97; CHECK-O-NEXT: Running analysis: LazyCallGraphAnalysis
98; CHECK-O-NEXT: Starting CGSCC pass manager run.
99; CHECK-O-NEXT: Running pass: InlinerPass
100; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy<{{.*}}LazyCallGraph{{.*}}>
101; CHECK-O-NEXT: Running pass: PostOrderFunctionAttrsPass
102; CHECK-O-NEXT: Running analysis: FunctionAnalysisManagerCGSCCProxy
103; CHECK-O3-NEXT: Running pass: ArgumentPromotionPass
104; CHECK-O-NEXT: Running pass: CGSCCToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
105; CHECK-O-NEXT: Starting llvm::Function pass manager run.
106; CHECK-O-NEXT: Running pass: SROA
107; CHECK-O-NEXT: Running pass: EarlyCSEPass
108; CHECK-O-NEXT: Running analysis: MemorySSAAnalysis
109; CHECK-O-NEXT: Running pass: SpeculativeExecutionPass
110; CHECK-O-NEXT: Running pass: JumpThreadingPass
111; CHECK-O-NEXT: Running analysis: LazyValueAnalysis
112; CHECK-O-NEXT: Running pass: CorrelatedValuePropagationPass
113; CHECK-O-NEXT: Running pass: SimplifyCFGPass
114; CHECK-O3-NEXT: Running pass: AggressiveInstCombinePass
115; CHECK-O-NEXT: Running pass: InstCombinePass
116; CHECK-O1-NEXT: Running pass: LibCallsShrinkWrapPass
117; CHECK-O2-NEXT: Running pass: LibCallsShrinkWrapPass
118; CHECK-O3-NEXT: Running pass: LibCallsShrinkWrapPass
119; CHECK-O-NEXT: Running pass: TailCallElimPass
120; CHECK-O-NEXT: Running pass: SimplifyCFGPass
121; CHECK-O-NEXT: Running pass: ReassociatePass
122; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
123; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopStandardAnalysisResults{{.*}}>
124; CHECK-O-NEXT: Starting llvm::Function pass manager run
125; CHECK-O-NEXT: Running pass: LoopSimplifyPass
126; CHECK-O-NEXT: Running analysis: LoopAnalysis
127; CHECK-O-NEXT: Running pass: LCSSAPass
128; CHECK-O-NEXT: Finished llvm::Function pass manager run
129; CHECK-O-NEXT: Running analysis: ScalarEvolutionAnalysis
130; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
131; CHECK-O-NEXT: Starting Loop pass manager run.
132; CHECK-O-NEXT: Running pass: LoopRotatePass
133; CHECK-O-NEXT: Running pass: LICM
134; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
135; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
136; CHECK-O-NEXT: Finished Loop pass manager run.
137; CHECK-O-NEXT: Running pass: SimplifyCFGPass
138; CHECK-O-NEXT: Running pass: InstCombinePass
139; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopStandardAnalysisResults{{.*}}>
140; CHECK-O-NEXT: Starting llvm::Function pass manager run
141; CHECK-O-NEXT: Running pass: LoopSimplifyPass
142; CHECK-O-NEXT: Running pass: LCSSAPass
143; CHECK-O-NEXT: Finished llvm::Function pass manager run
144; CHECK-O-NEXT: Starting Loop pass manager run.
145; CHECK-O-NEXT: Running pass: IndVarSimplifyPass
146; CHECK-O-NEXT: Running pass: LoopIdiomRecognizePass
147; CHECK-O-NEXT: Running pass: LoopDeletionPass
148; CHECK-O-NEXT: Running pass: LoopFullUnrollPass
149; CHECK-O-NEXT: Finished Loop pass manager run.
150; CHECK-Os-NEXT: Running pass: MergedLoadStoreMotionPass
151; CHECK-Os-NEXT: Running pass: GVN
152; CHECK-Os-NEXT: Running analysis: MemoryDependenceAnalysis
153; CHECK-Oz-NEXT: Running pass: MergedLoadStoreMotionPass
154; CHECK-Oz-NEXT: Running pass: GVN
155; CHECK-Oz-NEXT: Running analysis: MemoryDependenceAnalysis
156; CHECK-O2-NEXT: Running pass: MergedLoadStoreMotionPass
157; CHECK-O2-NEXT: Running pass: GVN
158; CHECK-O2-NEXT: Running analysis: MemoryDependenceAnalysis
159; CHECK-O3-NEXT: Running pass: MergedLoadStoreMotionPass
160; CHECK-O3-NEXT: Running pass: GVN
161; CHECK-O3-NEXT: Running analysis: MemoryDependenceAnalysis
162; CHECK-O-NEXT: Running pass: MemCpyOptPass
163; CHECK-O1-NEXT: Running analysis: MemoryDependenceAnalysis
164; CHECK-O-NEXT: Running pass: SCCPPass
165; CHECK-O-NEXT: Running pass: BDCEPass
166; CHECK-O-NEXT: Running analysis: DemandedBitsAnalysis
167; CHECK-O-NEXT: Running pass: InstCombinePass
168; CHECK-O-NEXT: Running pass: JumpThreadingPass
169; CHECK-O-NEXT: Running pass: CorrelatedValuePropagationPass
170; CHECK-O-NEXT: Running pass: DSEPass
171; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LICMPass{{.*}}>
172; CHECK-O-NEXT: Starting llvm::Function pass manager run
173; CHECK-O-NEXT: Running pass: LoopSimplifyPass
174; CHECK-O-NEXT: Running pass: LCSSAPass
175; CHECK-O-NEXT: Finished llvm::Function pass manager run
176; CHECK-O-NEXT: Running pass: ADCEPass
177; CHECK-O-NEXT: Running analysis: PostDominatorTreeAnalysis
178; CHECK-O-NEXT: Running pass: SimplifyCFGPass
179; CHECK-O-NEXT: Running pass: InstCombinePass
180; CHECK-O-NEXT: Finished llvm::Function pass manager run.
181; CHECK-O-NEXT: Finished CGSCC pass manager run.
182; CHECK-O-NEXT: Finished llvm::Module pass manager run.
183; CHECK-PRELINK-O-NEXT: Running pass: GlobalOptPass
184; CHECK-POSTLINK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
185; CHECK-POSTLINK-O-NEXT: Starting llvm::Module pass manager run.
186; CHECK-POSTLINK-O-NEXT: Running pass: GlobalOptPass
187; CHECK-POSTLINK-O-NEXT: Running pass: GlobalDCEPass
188; CHECK-POSTLINK-O-NEXT: Running pass: EliminateAvailableExternallyPass
189; CHECK-POSTLINK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
190; CHECK-POSTLINK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA
191; CHECK-POSTLINK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
192; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run.
193; CHECK-POSTLINK-O-NEXT: Running pass: Float2IntPass
194; CHECK-POSTLINK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopRotatePass
195; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run
196; CHECK-POSTLINK-O-NEXT: Running pass: LoopSimplifyPass
197; CHECK-POSTLINK-O-NEXT: Running pass: LCSSAPass
198; CHECK-POSTLINK-O-NEXT: Finished llvm::Function pass manager run
199; CHECK-POSTLINK-O-NEXT: Running pass: LoopDistributePass
200; CHECK-POSTLINK-O-NEXT: Running pass: LoopVectorizePass
201; CHECK-POSTLINK-O-NEXT: Running analysis: BlockFrequencyAnalysis
202; CHECK-POSTLINK-O-NEXT: Running analysis: BranchProbabilityAnalysis
203; CHECK-POSTLINK-O-NEXT: Running pass: LoopLoadEliminationPass
204; CHECK-POSTLINK-O-NEXT: Running analysis: LoopAccessAnalysis
205; CHECK-POSTLINK-O-NEXT: Running pass: InstCombinePass
206; CHECK-POSTLINK-O-NEXT: Running pass: SimplifyCFGPass
207; CHECK-POSTLINK-O-NEXT: Running pass: SLPVectorizerPass
208; CHECK-POSTLINK-O-NEXT: Running pass: InstCombinePass
209; CHECK-POSTLINK-O-NEXT: Running pass: LoopUnrollPass
210; CHECK-POSTLINK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
211; CHECK-POSTLINK-O-NEXT: Running pass: InstCombinePass
212; CHECK-POSTLINK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
213; CHECK-POSTLINK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LICMPass
214; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run
215; CHECK-POSTLINK-O-NEXT: Running pass: LoopSimplifyPass
216; CHECK-POSTLINK-O-NEXT: Running pass: LCSSAPass
217; CHECK-POSTLINK-O-NEXT: Finished llvm::Function pass manager run
218; CHECK-POSTLINK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
219; CHECK-POSTLINK-O-NEXT: Running pass: LoopSinkPass
220; CHECK-POSTLINK-O-NEXT: Running pass: InstSimplifierPass
221; CHECK-POSTLINK-O-NEXT: Running pass: DivRemPairsPass
222; CHECK-POSTLINK-O-NEXT: Running pass: SimplifyCFGPass
223; CHECK-POSTLINK-O-NEXT: Running pass: SpeculateAroundPHIsPass
224; CHECK-POSTLINK-O-NEXT: Finished llvm::Function pass manager run.
225; CHECK-POSTLINK-O-NEXT: Running pass: GlobalDCEPass
226; CHECK-POSTLINK-O-NEXT: Running pass: ConstantMergePass
227; CHECK-POSTLINK-O-NEXT: Finished llvm::Module pass manager run.
228; CHECK-O-NEXT: Finished llvm::Module pass manager run.
229; CHECK-PRELINK-O-NEXT: Running pass: NameAnonGlobalPass
230; CHECK-O-NEXT: Running pass: PrintModulePass
231
232; Make sure we get the IR back out without changes when we print the module.
233; CHECK-O-LABEL: define void @foo(i32 %n) local_unnamed_addr {
234; CHECK-O-NEXT: entry:
235; CHECK-O-NEXT:   br label %loop
236; CHECK-O:      loop:
237; CHECK-O-NEXT:   %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
238; CHECK-O-NEXT:   %iv.next = add i32 %iv, 1
239; CHECK-O-NEXT:   tail call void @bar()
240; CHECK-O-NEXT:   %cmp = icmp eq i32 %iv, %n
241; CHECK-O-NEXT:   br i1 %cmp, label %exit, label %loop
242; CHECK-O:      exit:
243; CHECK-O-NEXT:   ret void
244; CHECK-O-NEXT: }
245;
246; CHECK-O-NEXT: Finished llvm::Module pass manager run.
247
248declare void @bar() local_unnamed_addr
249
250define void @foo(i32 %n) local_unnamed_addr {
251entry:
252  br label %loop
253loop:
254  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
255  %iv.next = add i32 %iv, 1
256  tail call void @bar()
257  %cmp = icmp eq i32 %iv, %n
258  br i1 %cmp, label %exit, label %loop
259exit:
260  ret void
261}
262