LLVM 20.0.0git
Namespaces | Macros | Functions | Variables
InlineCost.cpp File Reference
#include "llvm/Analysis/InlineCost.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/MemoryBuiltins.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/AssemblyAnnotationWriter.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/InstVisitor.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/raw_ostream.h"
#include <climits>
#include <limits>
#include <optional>

Go to the source code of this file.

Namespaces

namespace  llvm
 This is an optimization pass for GlobalISel generic memory operations.
 
namespace  llvm::InlineConstants
 

Macros

#define DEBUG_TYPE   "inline-cost"
 
#define DEBUG_PRINT_STAT(x)   OS << " " #x ": " << x << "\n"
 

Functions

 STATISTIC (NumCallsAnalyzed, "Number of call sites analyzed")
 
std::optional< int > llvm::getStringFnAttrAsInt (const Attribute &Attr)
 
std::optional< int > llvm::getStringFnAttrAsInt (CallBase &CB, StringRef AttrKind)
 
std::optional< int > llvm::getStringFnAttrAsInt (Function *F, StringRef AttrKind)
 
int llvm::InlineConstants::getInstrCost ()
 
static bool functionsHaveCompatibleAttributes (Function *Caller, Function *Callee, TargetTransformInfo &TTI, function_ref< const TargetLibraryInfo &(Function &)> &GetTLI)
 Test that there are no attribute conflicts between Caller and Callee that prevent inlining.
 
static int computeThresholdFromOptLevels (unsigned OptLevel, unsigned SizeOptLevel)
 

Variables

static cl::opt< int > DefaultThreshold ("inlinedefault-threshold", cl::Hidden, cl::init(225), cl::desc("Default amount of inlining to perform"))
 
static cl::opt< boolIgnoreTTIInlineCompatible ("ignore-tti-inline-compatible", cl::Hidden, cl::init(false), cl::desc("Ignore TTI attributes compatibility check between callee/caller " "during inline cost calculation"))
 
static cl::opt< boolPrintInstructionComments ("print-instruction-comments", cl::Hidden, cl::init(false), cl::desc("Prints comments for instruction based on inline cost analysis"))
 
static cl::opt< int > InlineThreshold ("inline-threshold", cl::Hidden, cl::init(225), cl::desc("Control the amount of inlining to perform (default = 225)"))
 
static cl::opt< int > HintThreshold ("inlinehint-threshold", cl::Hidden, cl::init(325), cl::desc("Threshold for inlining functions with inline hint"))
 
static cl::opt< int > ColdCallSiteThreshold ("inline-cold-callsite-threshold", cl::Hidden, cl::init(45), cl::desc("Threshold for inlining cold callsites"))
 
static cl::opt< boolInlineEnableCostBenefitAnalysis ("inline-enable-cost-benefit-analysis", cl::Hidden, cl::init(false), cl::desc("Enable the cost-benefit analysis for the inliner"))
 
static cl::opt< int > InlineSavingsMultiplier ("inline-savings-multiplier", cl::Hidden, cl::init(8), cl::desc("Multiplier to multiply cycle savings by during inlining"))
 
static cl::opt< int > InlineSavingsProfitableMultiplier ("inline-savings-profitable-multiplier", cl::Hidden, cl::init(4), cl::desc("A multiplier on top of cycle savings to decide whether the " "savings won't justify the cost"))
 
static cl::opt< int > InlineSizeAllowance ("inline-size-allowance", cl::Hidden, cl::init(100), cl::desc("The maximum size of a callee that get's " "inlined without sufficient cycle savings"))
 
static cl::opt< int > ColdThreshold ("inlinecold-threshold", cl::Hidden, cl::init(45), cl::desc("Threshold for inlining functions with cold attribute"))
 
static cl::opt< int > HotCallSiteThreshold ("hot-callsite-threshold", cl::Hidden, cl::init(3000), cl::desc("Threshold for hot callsites "))
 
static cl::opt< int > LocallyHotCallSiteThreshold ("locally-hot-callsite-threshold", cl::Hidden, cl::init(525), cl::desc("Threshold for locally hot callsites "))
 
static cl::opt< int > ColdCallSiteRelFreq ("cold-callsite-rel-freq", cl::Hidden, cl::init(2), cl::desc("Maximum block frequency, expressed as a percentage of caller's " "entry frequency, for a callsite to be cold in the absence of " "profile information."))
 
static cl::opt< uint64_tHotCallSiteRelFreq ("hot-callsite-rel-freq", cl::Hidden, cl::init(60), cl::desc("Minimum block frequency, expressed as a multiple of caller's " "entry frequency, for a callsite to be hot in the absence of " "profile information."))
 
static cl::opt< int > InstrCost ("inline-instr-cost", cl::Hidden, cl::init(5), cl::desc("Cost of a single instruction when inlining"))
 
static cl::opt< int > MemAccessCost ("inline-memaccess-cost", cl::Hidden, cl::init(0), cl::desc("Cost of load/store instruction when inlining"))
 
static cl::opt< int > CallPenalty ("inline-call-penalty", cl::Hidden, cl::init(25), cl::desc("Call penalty that is applied per callsite when inlining"))
 
static cl::opt< size_t > StackSizeThreshold ("inline-max-stacksize", cl::Hidden, cl::init(std::numeric_limits< size_t >::max()), cl::desc("Do not inline functions with a stack size " "that exceeds the specified limit"))
 
static cl::opt< size_t > RecurStackSizeThreshold ("recursive-inline-max-stacksize", cl::Hidden, cl::init(InlineConstants::TotalAllocaSizeRecursiveCaller), cl::desc("Do not inline recursive functions with a stack " "size that exceeds the specified limit"))
 
static cl::opt< boolOptComputeFullInlineCost ("inline-cost-full", cl::Hidden, cl::desc("Compute the full inline cost of a call site even when the cost " "exceeds the threshold."))
 
static cl::opt< boolInlineCallerSupersetNoBuiltin ("inline-caller-superset-nobuiltin", cl::Hidden, cl::init(true), cl::desc("Allow inlining when caller has a superset of callee's nobuiltin " "attributes."))
 
static cl::opt< boolDisableGEPConstOperand ("disable-gep-const-evaluation", cl::Hidden, cl::init(false), cl::desc("Disables evaluation of GetElementPtr with constant operands"))
 

Macro Definition Documentation

◆ DEBUG_PRINT_STAT

#define DEBUG_PRINT_STAT (   x)    OS << " " #x ": " << x << "\n"

◆ DEBUG_TYPE

#define DEBUG_TYPE   "inline-cost"

Definition at line 52 of file InlineCost.cpp.

Function Documentation

◆ computeThresholdFromOptLevels()

static int computeThresholdFromOptLevels ( unsigned  OptLevel,
unsigned  SizeOptLevel 
)
static

◆ functionsHaveCompatibleAttributes()

static bool functionsHaveCompatibleAttributes ( Function Caller,
Function Callee,
TargetTransformInfo TTI,
function_ref< const TargetLibraryInfo &(Function &)> &  GetTLI 
)
static

Test that there are no attribute conflicts between Caller and Callee that prevent inlining.

Definition at line 2881 of file InlineCost.cpp.

References llvm::AttributeFuncs::areInlineCompatible(), llvm::TargetTransformInfo::areInlineCompatible(), IgnoreTTIInlineCompatible, and InlineCallerSupersetNoBuiltin.

Referenced by llvm::getAttributeBasedInliningDecision().

◆ STATISTIC()

STATISTIC ( NumCallsAnalyzed  ,
"Number of call sites analyzed"   
)

Variable Documentation

◆ CallPenalty

cl::opt< int > CallPenalty("inline-call-penalty", cl::Hidden, cl::init(25), cl::desc("Call penalty that is applied per callsite when inlining")) ( "inline-call-penalty"  ,
cl::Hidden  ,
cl::init(25)  ,
cl::desc("Call penalty that is applied per callsite when inlining")   
)
static

Referenced by llvm::getCallsiteCost().

◆ ColdCallSiteRelFreq

cl::opt< int > ColdCallSiteRelFreq("cold-callsite-rel-freq", cl::Hidden, cl::init(2), cl::desc("Maximum block frequency, expressed as a percentage of caller's " "entry frequency, for a callsite to be cold in the absence of " "profile information.")) ( "cold-callsite-rel-freq"  ,
cl::Hidden  ,
cl::init(2)  ,
cl::desc("Maximum block frequency, expressed as a percentage of caller's " "entry frequency, for a callsite to be cold in the absence of " "profile information.")   
)
static

◆ ColdCallSiteThreshold

cl::opt< int > ColdCallSiteThreshold("inline-cold-callsite-threshold", cl::Hidden, cl::init(45), cl::desc("Threshold for inlining cold callsites")) ( "inline-cold-callsite-threshold"  ,
cl::Hidden  ,
cl::init(45)  ,
cl::desc("Threshold for inlining cold callsites")   
)
static

Referenced by llvm::getInlineParams().

◆ ColdThreshold

cl::opt< int > ColdThreshold("inlinecold-threshold", cl::Hidden, cl::init(45), cl::desc("Threshold for inlining functions with cold attribute")) ( "inlinecold-threshold"  ,
cl::Hidden  ,
cl::init(45)  ,
cl::desc("Threshold for inlining functions with cold attribute")   
)
static

Referenced by llvm::getInlineParams().

◆ DefaultThreshold

cl::opt< int > DefaultThreshold("inlinedefault-threshold", cl::Hidden, cl::init(225), cl::desc("Default amount of inlining to perform")) ( "inlinedefault-threshold"  ,
cl::Hidden  ,
cl::init(225)  ,
cl::desc("Default amount of inlining to perform")   
)
static

◆ DisableGEPConstOperand

cl::opt< bool > DisableGEPConstOperand("disable-gep-const-evaluation", cl::Hidden, cl::init(false), cl::desc("Disables evaluation of GetElementPtr with constant operands")) ( "disable-gep-const-evaluation"  ,
cl::Hidden  ,
cl::init(false)  ,
cl::desc("Disables evaluation of GetElementPtr with constant operands")   
)
static

◆ HintThreshold

cl::opt< int > HintThreshold("inlinehint-threshold", cl::Hidden, cl::init(325), cl::desc("Threshold for inlining functions with inline hint")) ( "inlinehint-threshold"  ,
cl::Hidden  ,
cl::init(325)  ,
cl::desc("Threshold for inlining functions with inline hint")   
)
static

Referenced by llvm::getInlineParams().

◆ HotCallSiteRelFreq

cl::opt< uint64_t > HotCallSiteRelFreq("hot-callsite-rel-freq", cl::Hidden, cl::init(60), cl::desc("Minimum block frequency, expressed as a multiple of caller's " "entry frequency, for a callsite to be hot in the absence of " "profile information.")) ( "hot-callsite-rel-freq"  ,
cl::Hidden  ,
cl::init(60)  ,
cl::desc("Minimum block frequency, expressed as a multiple of caller's " "entry frequency, for a callsite to be hot in the absence of " "profile information.")   
)
static

◆ HotCallSiteThreshold

cl::opt< int > HotCallSiteThreshold("hot-callsite-threshold", cl::Hidden, cl::init(3000), cl::desc("Threshold for hot callsites ")) ( "hot-callsite-threshold"  ,
cl::Hidden  ,
cl::init(3000)  ,
cl::desc("Threshold for hot callsites ")   
)
static

Referenced by llvm::getInlineParams().

◆ IgnoreTTIInlineCompatible

cl::opt< bool > IgnoreTTIInlineCompatible("ignore-tti-inline-compatible", cl::Hidden, cl::init(false), cl::desc("Ignore TTI attributes compatibility check between callee/caller " "during inline cost calculation")) ( "ignore-tti-inline-compatible"  ,
cl::Hidden  ,
cl::init(false)  ,
cl::desc("Ignore TTI attributes compatibility check between callee/caller " "during inline cost calculation")   
)
static

◆ InlineCallerSupersetNoBuiltin

cl::opt< bool > InlineCallerSupersetNoBuiltin("inline-caller-superset-nobuiltin", cl::Hidden, cl::init(true), cl::desc("Allow inlining when caller has a superset of callee's nobuiltin " "attributes.")) ( "inline-caller-superset-nobuiltin"  ,
cl::Hidden  ,
cl::init(true ,
cl::desc("Allow inlining when caller has a superset of callee's nobuiltin " "attributes.")   
)
static

◆ InlineEnableCostBenefitAnalysis

cl::opt< bool > InlineEnableCostBenefitAnalysis("inline-enable-cost-benefit-analysis", cl::Hidden, cl::init(false), cl::desc("Enable the cost-benefit analysis for the inliner")) ( "inline-enable-cost-benefit-analysis"  ,
cl::Hidden  ,
cl::init(false)  ,
cl::desc("Enable the cost-benefit analysis for the inliner")   
)
static

◆ InlineSavingsMultiplier

cl::opt< int > InlineSavingsMultiplier("inline-savings-multiplier", cl::Hidden, cl::init(8), cl::desc("Multiplier to multiply cycle savings by during inlining")) ( "inline-savings-multiplier"  ,
cl::Hidden  ,
cl::init(8)  ,
cl::desc("Multiplier to multiply cycle savings by during inlining")   
)
static

◆ InlineSavingsProfitableMultiplier

cl::opt< int > InlineSavingsProfitableMultiplier("inline-savings-profitable-multiplier", cl::Hidden, cl::init(4), cl::desc("A multiplier on top of cycle savings to decide whether the " "savings won't justify the cost")) ( "inline-savings-profitable-multiplier"  ,
cl::Hidden  ,
cl::init(4)  ,
cl::desc("A multiplier on top of cycle savings to decide whether the " "savings won't justify the cost")   
)
static

◆ InlineSizeAllowance

cl::opt< int > InlineSizeAllowance("inline-size-allowance", cl::Hidden, cl::init(100), cl::desc("The maximum size of a callee that get's " "inlined without sufficient cycle savings")) ( "inline-size-allowance"  ,
cl::Hidden  ,
cl::init(100)  ,
cl::desc("The maximum size of a callee that get's " "inlined without sufficient cycle savings")   
)
static

◆ InlineThreshold

cl::opt< int > InlineThreshold("inline-threshold", cl::Hidden, cl::init(225), cl::desc("Control the amount of inlining to perform (default = 225)")) ( "inline-threshold"  ,
cl::Hidden  ,
cl::init(225)  ,
cl::desc("Control the amount of inlining to perform (default = 225)")   
)
static

Referenced by llvm::getInlineParams().

◆ InstrCost

cl::opt< int > InstrCost("inline-instr-cost", cl::Hidden, cl::init(5), cl::desc("Cost of a single instruction when inlining")) ( "inline-instr-cost"  ,
cl::Hidden  ,
cl::init(5)  ,
cl::desc("Cost of a single instruction when inlining")   
)
static

◆ LocallyHotCallSiteThreshold

cl::opt< int > LocallyHotCallSiteThreshold("locally-hot-callsite-threshold", cl::Hidden, cl::init(525), cl::desc("Threshold for locally hot callsites ")) ( "locally-hot-callsite-threshold"  ,
cl::Hidden  ,
cl::init(525)  ,
cl::desc("Threshold for locally hot callsites ")   
)
static

Referenced by llvm::getInlineParams().

◆ MemAccessCost

cl::opt< int > MemAccessCost("inline-memaccess-cost", cl::Hidden, cl::init(0), cl::desc("Cost of load/store instruction when inlining")) ( "inline-memaccess-cost"  ,
cl::Hidden  ,
cl::init(0)  ,
cl::desc("Cost of load/store instruction when inlining")   
)
static

◆ OptComputeFullInlineCost

cl::opt< bool > OptComputeFullInlineCost("inline-cost-full", cl::Hidden, cl::desc("Compute the full inline cost of a call site even when the cost " "exceeds the threshold.")) ( "inline-cost-full"  ,
cl::Hidden  ,
cl::desc("Compute the full inline cost of a call site even when the cost " "exceeds the threshold.")   
)
static

◆ PrintInstructionComments

cl::opt< bool > PrintInstructionComments("print-instruction-comments", cl::Hidden, cl::init(false), cl::desc("Prints comments for instruction based on inline cost analysis")) ( "print-instruction-comments"  ,
cl::Hidden  ,
cl::init(false)  ,
cl::desc("Prints comments for instruction based on inline cost analysis")   
)
static

◆ RecurStackSizeThreshold

cl::opt< size_t > RecurStackSizeThreshold("recursive-inline-max-stacksize", cl::Hidden, cl::init(InlineConstants::TotalAllocaSizeRecursiveCaller), cl::desc("Do not inline recursive functions with a stack " "size that exceeds the specified limit")) ( "recursive-inline-max-stacksize"  ,
cl::Hidden  ,
cl::init(InlineConstants::TotalAllocaSizeRecursiveCaller)  ,
cl::desc("Do not inline recursive functions with a stack " "size that exceeds the specified limit")   
)
static

◆ StackSizeThreshold

cl::opt< size_t > StackSizeThreshold("inline-max-stacksize", cl::Hidden, cl::init(std::numeric_limits< size_t >::max()), cl::desc("Do not inline functions with a stack size " "that exceeds the specified limit")) ( "inline-max-stacksize"  ,
cl::Hidden  ,
cl::init(std::numeric_limits< size_t >::max())  ,
cl::desc("Do not inline functions with a stack size " "that exceeds the specified limit")   
)
static