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llvm-mirror/test/Other/new-pm-defaults.ll
Roman Lebedev 10ca53ce65 [NewPM] Remove SpeculateAroundPHIs pass 
Addition of this pass has been botched.
There is no particular reason why it had to be sold as an inseparable part
of new-pm transition. It was added when old-pm was still the default,
and very *very* few users were actually tracking new-pm,
so it's effects weren't measured.

Which means, some of the turnoil of the new-pm transition
are actually likely regressions due to this pass.

Likewise, there has been a number of post-commit feedback
(post new-pm switch), namely
* https://reviews.llvm.org/D37467#2787157 (regresses HW-loops)
* https://reviews.llvm.org/D37467#2787259 (should not be in middle-end, should run after LSR, not before)
* https://reviews.llvm.org/D95789 (an attempt to fix bad loop backedge metadata)
and in the half year past, the pass authors (google) still haven't found time to respond to any of that.

Hereby it is proposed to backout the pass from the pipeline,
until someone who cares about it can address the issues reported,
and properly start the process of adding a new pass into the pipeline,
with proper performance evaluation.

Furthermore, neither google nor facebook reports any perf changes
from this change, so i'm dropping the pass completely.
It can always be re-reverted should/if anyone want to pick it up again.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D104099
2021-06-15 20:35:55 +03:00

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; The IR below was crafted so as:
; 1) To have a loop, so we create a loop pass manager
; 2) To be "immutable" in the sense that no pass in the standard
; pipeline will modify it.
; Since no transformations take place, we don't expect any analyses
; to be invalidated.
; Any invalidation that shows up here is a bug, unless we started modifying
; the IR, in which case we need to make it immutable harder.
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='default<O1>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O1,%llvmcheckext
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='default<O2>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O2,CHECK-O23SZ,%llvmcheckext
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,CHECK-O23SZ,%llvmcheckext
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='default<Os>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-Os,CHECK-O23SZ,%llvmcheckext
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='default<Oz>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-Oz,CHECK-O23SZ,%llvmcheckext
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='lto-pre-link<O2>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-LTO,CHECK-O2,CHECK-O23SZ,%llvmcheckext
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-peephole='no-op-function' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-PEEPHOLE,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-late-loop-optimizations='no-op-loop' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-LOOP-LATE,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-loop-optimizer-end='no-op-loop' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-LOOP-END,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-scalar-optimizer-late='no-op-function' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-SCALAR-LATE,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-cgscc-optimizer-late='no-op-cgscc' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-CGSCC-LATE,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-vectorizer-start='no-op-function' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-VECTORIZER-START,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-pipeline-start='no-op-module' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-PIPELINE-START,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-pipeline-early-simplification='no-op-module' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-PIPELINE-EARLY-SIMPLIFICATION,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-pipeline-start='no-op-module' \
; RUN: -passes='lto-pre-link<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-LTO,CHECK-O3,%llvmcheckext,CHECK-EP-PIPELINE-START,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes-ep-optimizer-last='no-op-function' \
; RUN: -passes='default<O3>' -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,%llvmcheckext,CHECK-EP-OPTIMIZER-LAST,CHECK-O23SZ
; RUN: opt -disable-verify -verify-cfg-preserved=1 -debug-pass-manager \
; RUN: -passes='default<O3>' -enable-matrix -S %s 2>&1 \
; RUN: | FileCheck %s --check-prefixes=CHECK-O,CHECK-DEFAULT,CHECK-O3,CHECK-O23SZ,%llvmcheckext,CHECK-MATRIX
; Suppress FileCheck --allow-unused-prefixes=false diagnostics.
; CHECK-Oz: {{^}}
; CHECK-O: Running pass: Annotation2Metadata
; CHECK-O-NEXT: Running pass: ForceFunctionAttrsPass
; CHECK-EP-PIPELINE-START-NEXT: Running pass: NoOpModulePass
; CHECK-O-NEXT: Running pass: InferFunctionAttrsPass
; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Running analysis: PreservedCFGCheckerAnalysis on foo
; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
; CHECK-O-NEXT: Running pass: SROA
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O2-NEXT: Running pass: OpenMPOptPass
; CHECK-O3-NEXT: Running pass: OpenMPOptPass
; CHECK-EP-PIPELINE-EARLY-SIMPLIFICATION-NEXT: Running pass: NoOpModulePass
; CHECK-O-NEXT: Running pass: IPSCCPPass
; CHECK-O-NEXT: Running pass: CalledValuePropagationPass
; CHECK-O-NEXT: Running pass: GlobalOptPass
; CHECK-O-NEXT: Running pass: PromotePass
; CHECK-O-NEXT: Running pass: DeadArgumentEliminationPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running analysis: OptimizationRemarkEmitterAnalysis
; CHECK-O-NEXT: Running analysis: AAManager
; CHECK-O-NEXT: Running analysis: BasicAA
; CHECK-O-NEXT: Running analysis: ScopedNoAliasAA
; CHECK-O-NEXT: Running analysis: TypeBasedAA
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: ModuleInlinerWrapperPass
; CHECK-O-NEXT: Running analysis: InlineAdvisorAnalysis
; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA
; CHECK-O-NEXT: Running analysis: GlobalsAA
; CHECK-O-NEXT: Running analysis: CallGraphAnalysis
; CHECK-O-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}AAManager
; CHECK-O-NEXT: Invalidating analysis: AAManager
; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}ProfileSummaryAnalysis
; CHECK-O-NEXT: Running analysis: ProfileSummaryAnalysis
; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O-NEXT: Running analysis: LazyCallGraphAnalysis
; CHECK-O-NEXT: Running analysis: FunctionAnalysisManagerCGSCCProxy
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy<{{.*}}LazyCallGraph::SCC{{.*}}>
; CHECK-O-NEXT: Running pass: DevirtSCCRepeatedPass
; CHECK-O-NEXT: Running pass: InlinerPass
; CHECK-O-NEXT: Running pass: InlinerPass
; CHECK-O-NEXT: Running pass: PostOrderFunctionAttrsPass
; CHECK-O-NEXT: Running analysis: AAManager
; CHECK-O3-NEXT: Running pass: ArgumentPromotionPass
; CHECK-O2-NEXT: Running pass: OpenMPOptCGSCCPass on (foo)
; CHECK-O3-NEXT: Running pass: OpenMPOptCGSCCPass on (foo)
; CHECK-EP-CGSCC-LATE-NEXT: Running pass: NoOpCGSCCPass
; CHECK-O-NEXT: Running pass: SROA
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: MemorySSAAnalysis
; CHECK-O23SZ-NEXT: Running pass: SpeculativeExecutionPass
; CHECK-O23SZ-NEXT: Running pass: JumpThreadingPass
; CHECK-O23SZ-NEXT: Running analysis: LazyValueAnalysis
; CHECK-O23SZ-NEXT: Running pass: CorrelatedValuePropagationPass
; CHECK-O23SZ-NEXT: Invalidating analysis: LazyValueAnalysis
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O3-NEXT: AggressiveInstCombinePass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O1-NEXT: Running pass: LibCallsShrinkWrapPass
; CHECK-O2-NEXT: Running pass: LibCallsShrinkWrapPass
; CHECK-O3-NEXT: Running pass: LibCallsShrinkWrapPass
; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
; CHECK-O23SZ-NEXT: Running pass: TailCallElimPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: ReassociatePass
; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
; CHECK-O-NEXT: Running pass: LoopSimplifyPass
; CHECK-O-NEXT: Running analysis: LoopAnalysis
; CHECK-O-NEXT: Running pass: LCSSAPass
; CHECK-O-NEXT: Running analysis: ScalarEvolutionAnalysis
; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopInstSimplifyPass
; CHECK-O-NEXT: Running pass: LoopSimplifyCFGPass
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: LoopRotatePass
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass
; CHECK-O-NEXT: Running pass: LCSSAPass
; CHECK-O-NEXT: Running pass: LoopIdiomRecognizePass
; CHECK-O-NEXT: Running pass: IndVarSimplifyPass
; CHECK-EP-LOOP-LATE-NEXT: Running pass: NoOpLoopPass
; CHECK-O-NEXT: Running pass: LoopDeletionPass
; CHECK-O-NEXT: Running pass: LoopFullUnrollPass
; CHECK-EP-LOOP-END-NEXT: Running pass: NoOpLoopPass
; CHECK-O-NEXT: Running pass: SROA on foo
; CHECK-O23SZ-NEXT: Running pass: MergedLoadStoreMotionPass
; CHECK-O23SZ-NEXT: Running pass: GVN
; CHECK-O23SZ-NEXT: Running analysis: MemoryDependenceAnalysis
; CHECK-O23SZ-NEXT: Running analysis: PhiValuesAnalysis
; CHECK-O1-NEXT: Running pass: MemCpyOptPass
; CHECK-O-NEXT: Running pass: SCCPPass
; CHECK-O-NEXT: Running pass: BDCEPass
; CHECK-O-NEXT: Running analysis: DemandedBitsAnalysis
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
; CHECK-O23SZ-NEXT: Running pass: JumpThreadingPass
; CHECK-O23SZ-NEXT: Running analysis: LazyValueAnalysis
; CHECK-O23SZ-NEXT: Running pass: CorrelatedValuePropagationPass
; CHECK-O23SZ-NEXT: Invalidating analysis: LazyValueAnalysis
; CHECK-O-NEXT: Running pass: ADCEPass
; CHECK-O-NEXT: Running analysis: PostDominatorTreeAnalysis
; CHECK-O23SZ-NEXT: Running pass: MemCpyOptPass
; CHECK-O23SZ-NEXT: Running pass: DSEPass
; CHECK-O23SZ-NEXT: Running pass: LoopSimplifyPass
; CHECK-O23SZ-NEXT: Running pass: LCSSAPass
; CHECK-O23SZ-NEXT: Running pass: LICMPass
; CHECK-EP-SCALAR-LATE-NEXT: Running pass: NoOpFunctionPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
; CHECK-O-NEXT: Running pass: GlobalOptPass
; CHECK-O-NEXT: Running pass: GlobalDCEPass
; CHECK-DEFAULT-NEXT: Running pass: EliminateAvailableExternallyPass
; CHECK-LTO-NOT: Running pass: EliminateAvailableExternallyPass
; CHECK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA
; CHECK-O-NEXT: Running pass: Float2IntPass
; CHECK-O-NEXT: Running pass: LowerConstantIntrinsicsPass on foo
; CHECK-MATRIX: Running pass: LowerMatrixIntrinsicsPass on f
; CHECK-MATRIX-NEXT: Running pass: EarlyCSEPass on f
; CHECK-EP-VECTORIZER-START-NEXT: Running pass: NoOpFunctionPass
; CHECK-EXT: Running pass: {{.*}}::Bye on foo
; CHECK-NOEXT: {{^}}
; CHECK-O-NEXT: Running pass: LoopSimplifyPass
; CHECK-O-NEXT: Running pass: LCSSAPass
; CHECK-O-NEXT: Running pass: LoopRotatePass
; CHECK-O-NEXT: Running pass: LoopDistributePass
; CHECK-O-NEXT: Running pass: InjectTLIMappings
; CHECK-O-NEXT: Running pass: LoopVectorizePass
; CHECK-O-NEXT: Running analysis: BlockFrequencyAnalysis
; CHECK-O-NEXT: Running analysis: BranchProbabilityAnalysis
; CHECK-O-NEXT: Running pass: LoopLoadEliminationPass
; CHECK-O-NEXT: Running analysis: LoopAccessAnalysis
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O2-NEXT: Running pass: SLPVectorizerPass
; CHECK-O3-NEXT: Running pass: SLPVectorizerPass
; CHECK-Os-NEXT: Running pass: SLPVectorizerPass
; CHECK-O-NEXT: Running pass: VectorCombinePass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopUnrollPass
; CHECK-O-NEXT: Running pass: WarnMissedTransformationsPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
; CHECK-O-NEXT: Running pass: LoopSimplifyPass
; CHECK-O-NEXT: Running pass: LCSSAPass
; CHECK-O-NEXT: Running pass: LICMPass
; CHECK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
; CHECK-O-NEXT: Running pass: LoopSinkPass
; CHECK-O-NEXT: Running pass: InstSimplifyPass
; CHECK-O-NEXT: Running pass: DivRemPairsPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-EP-OPTIMIZER-LAST: Running pass: NoOpFunctionPass
; CHECK-O-NEXT: Running pass: CGProfilePass
; CHECK-O-NEXT: Running pass: GlobalDCEPass
; CHECK-O-NEXT: Running pass: ConstantMergePass
; CHECK-DEFAULT-NEXT: Running pass: RelLookupTableConverterPass
; CHECK-LTO-NOT: Running pass: RelLookupTableConverterPass
; CHECK-DEFAULT-NEXT: Running analysis: TargetIRAnalysis
; CHECK-LTO-NOT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running pass: AnnotationRemarksPass on foo
; CHECK-LTO-NEXT: Running pass: CanonicalizeAliasesPass
; CHECK-LTO-NEXT: Running pass: NameAnonGlobalPass
; CHECK-O-NEXT: Running pass: PrintModulePass
;
; Make sure we get the IR back out without changes when we print the module.
; CHECK-O-LABEL: define void @foo(i32 %n) local_unnamed_addr {
; CHECK-O-NEXT: entry:
; CHECK-O-NEXT: br label %loop
; CHECK-O: loop:
; CHECK-O-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
; CHECK-O-NEXT: %iv.next = add i32 %iv, 1
; CHECK-O-NEXT: tail call void @bar()
; CHECK-O-NEXT: %cmp = icmp eq i32 %iv, %n
; CHECK-O-NEXT: br i1 %cmp, label %exit, label %loop
; CHECK-O: exit:
; CHECK-O-NEXT: ret void
; CHECK-O-NEXT: }
declare void @bar() local_unnamed_addr
define void @foo(i32 %n) local_unnamed_addr {
entry:
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%iv.next = add i32 %iv, 1
tail call void @bar()
%cmp = icmp eq i32 %iv, %n
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
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