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; RUN: opt -enable-new-pm=0 -O3 -enable-matrix -debug-pass=Structure < %s -o /dev/null 2>&1 | FileCheck %s
; REQUIRES: asserts
; CHECK-LABEL: Pass Arguments:
; CHECK-NEXT: Target Transform Information
; CHECK-NEXT: Type-Based Alias Analysis
; CHECK-NEXT: Scoped NoAlias Alias Analysis
; CHECK-NEXT: Assumption Cache Tracker
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Module Verifier
; CHECK-EXT: Good Bye World Pass
; CHECK-NOEXT-NOT: Good Bye World Pass
; CHECK-NEXT: Instrument function entry/exit with calls to e.g. mcount() (pre inlining)
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: SROA
; CHECK-NEXT: Early CSE
; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: Target Transform Information
; Target Pass Configuration
; CHECK: Type-Based Alias Analysis
; CHECK-NEXT: Scoped NoAlias Alias Analysis
; CHECK-NEXT: Assumption Cache Tracker
; CHECK-NEXT: Profile summary info
; CHECK-NEXT: ModulePass Manager
; CHECK-NEXT: Force set function attributes
; CHECK-NEXT: Infer set function attributes
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Call-site splitting
; CHECK-NEXT: Interprocedural Sparse Conditional Constant Propagation
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Called Value Propagation
; CHECK-NEXT: Global Variable Optimizer
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Promote Memory to Register
; CHECK-NEXT: Dead Argument Elimination
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: CallGraph Construction
; CHECK-NEXT: Globals Alias Analysis
; CHECK-NEXT: Call Graph SCC Pass Manager
; CHECK-NEXT: Remove unused exception handling info
; CHECK-NEXT: Function Integration/Inlining
; CHECK-NEXT: OpenMP specific optimizations
; CHECK-NEXT: Deduce function attributes
; CHECK-NEXT: Promote 'by reference' arguments to scalars
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: SROA
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory SSA
; CHECK-NEXT: Early CSE w/ MemorySSA
; CHECK-NEXT: Speculatively execute instructions if target has divergent branches
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Lazy Value Information Analysis
; CHECK-NEXT: Jump Threading
; CHECK-NEXT: Value Propagation
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Combine pattern based expressions
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Conditionally eliminate dead library calls
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: PGOMemOPSize
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Tail Call Elimination
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Reassociate expressions
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Rotate Loops
; CHECK-NEXT: Memory SSA
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Loop Invariant Code Motion
; CHECK-NEXT: Unswitch loops
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Induction Variable Simplification
; CHECK-NEXT: Recognize loop idioms
; CHECK-NEXT: Delete dead loops
; CHECK-NEXT: Unroll loops
; CHECK-NEXT: MergedLoadStoreMotion
; CHECK-NEXT: Phi Values Analysis
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory Dependence Analysis
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Global Value Numbering
; CHECK-NEXT: Phi Values Analysis
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory Dependence Analysis
; CHECK-NEXT: MemCpy Optimization
; CHECK-NEXT: Sparse Conditional Constant Propagation
; CHECK-NEXT: Demanded bits analysis
; CHECK-NEXT: Bit-Tracking Dead Code Elimination
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Lazy Value Information Analysis
; CHECK-NEXT: Jump Threading
; CHECK-NEXT: Value Propagation
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Phi Values Analysis
; CHECK-NEXT: Memory Dependence Analysis
[DSE] Switch to MemorySSA-backed DSE by default. The tests have been updated and I plan to move them from the MSSA directory up. Some end-to-end tests needed small adjustments. One difference to the legacy DSE is that legacy DSE also deletes trivially dead instructions that are unrelated to memory operations. Because MemorySSA-backed DSE just walks the MemorySSA, we only visit/check memory instructions. But removing unrelated dead instructions is not really DSE's job and other passes will clean up. One noteworthy change is in llvm/test/Transforms/Coroutines/ArgAddr.ll, but I think this comes down to legacy DSE not handling instructions that may throw correctly in that case. To cover this with MemorySSA-backed DSE, we need an update to llvm.coro.begin to treat it's return value to belong to the same underlying object as the passed pointer. There are some minor cases MemorySSA-backed DSE currently misses, e.g. related to atomic operations, but I think those can be implemented after the switch. This has been discussed on llvm-dev: http://lists.llvm.org/pipermail/llvm-dev/2020-August/144417.html For the MultiSource/SPEC2000/SPEC2006 the number of eliminated stores goes from ~17500 (legayc DSE) to ~26300 (MemorySSA-backed). More numbers and details in the thread on llvm-dev. Impact on CTMark: ``` Legacy Pass Manager exec instrs size-text O3 + 0.60% - 0.27% ReleaseThinLTO + 1.00% - 0.42% ReleaseLTO-g. + 0.77% - 0.33% RelThinLTO (link only) + 0.87% - 0.42% RelLO-g (link only) + 0.78% - 0.33% ``` http://llvm-compile-time-tracker.com/compare.php?from=3f22e96d95c71ded906c67067d75278efb0a2525&to=ae8be4642533ff03803967ee9d7017c0d73b0ee0&stat=instructions ``` New Pass Manager exec instrs. size-text O3 + 0.95% - 0.25% ReleaseThinLTO + 1.34% - 0.41% ReleaseLTO-g. + 1.71% - 0.35% RelThinLTO (link only) + 0.96% - 0.41% RelLO-g (link only) + 2.21% - 0.35% ``` http://195.201.131.214:8000/compare.php?from=3f22e96d95c71ded906c67067d75278efb0a2525&to=ae8be4642533ff03803967ee9d7017c0d73b0ee0&stat=instructions Reviewed By: asbirlea, xbolva00, nikic Differential Revision: https://reviews.llvm.org/D87163
2020-09-11 05:00:10 +08:00
; CHECK-NEXT: Dead Store Elimination
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory SSA
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Loop Invariant Code Motion
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Aggressive Dead Code Elimination
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: A No-Op Barrier Pass
; CHECK-NEXT: Eliminate Available Externally Globals
; CHECK-NEXT: CallGraph Construction
; CHECK-NEXT: Deduce function attributes in RPO
; CHECK-NEXT: Global Variable Optimizer
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: Dead Global Elimination
; CHECK-NEXT: CallGraph Construction
; CHECK-NEXT: Globals Alias Analysis
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Float to int
; CHECK-NEXT: Lower constant intrinsics
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Lower the matrix intrinsics
; CHECK-NEXT: Early CSE
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Rotate Loops
; CHECK-NEXT: Loop Access Analysis
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Loop Distribution
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Loop Access Analysis
; CHECK-NEXT: Demanded bits analysis
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Inject TLI Mappings
; CHECK-NEXT: Loop Vectorization
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Loop Access Analysis
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Loop Load Elimination
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Demanded bits analysis
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Inject TLI Mappings
; CHECK-NEXT: SLP Vectorizer
; CHECK-NEXT: Optimize scalar/vector ops
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Unroll loops
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Memory SSA
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Loop Invariant Code Motion
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Warn about non-applied transformations
; CHECK-NEXT: Alignment from assumptions
; CHECK-NEXT: Strip Unused Function Prototypes
; CHECK-NEXT: Dead Global Elimination
; CHECK-NEXT: Merge Duplicate Global Constants
; CHECK-NEXT: Call Graph Profile
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: Canonicalize natural loops
; CHECK-NEXT: LCSSA Verifier
; CHECK-NEXT: Loop-Closed SSA Form Pass
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Scalar Evolution Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: Loop Pass Manager
; CHECK-NEXT: Loop Sink
; CHECK-NEXT: Lazy Branch Probability Analysis
; CHECK-NEXT: Lazy Block Frequency Analysis
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Remove redundant instructions
; CHECK-NEXT: Hoist/decompose integer division and remainder
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Module Verifier
; CHECK-NEXT: Bitcode Writer
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Post-Dominator Tree Construction
; CHECK-NEXT: Branch Probability Analysis
; CHECK-NEXT: Block Frequency Analysis
define void @f() {
ret void
}