LLVM  14.0.0git
Public Member Functions | Public Attributes | List of all members
llvm::GlobalValueSummary::GVFlags Struct Reference

Group flags (Linkage, NotEligibleToImport, etc.) as a bitfield. More...

#include "llvm/IR/ModuleSummaryIndex.h"

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Public Member Functions

 GVFlags (GlobalValue::LinkageTypes Linkage, GlobalValue::VisibilityTypes Visibility, bool NotEligibleToImport, bool Live, bool IsLocal, bool CanAutoHide)
 Convenience Constructors. More...
 

Public Attributes

unsigned Linkage: 4
 The linkage type of the associated global value. More...
 
unsigned Visibility: 2
 Indicates the visibility. More...
 
unsigned NotEligibleToImport: 1
 Indicate if the global value cannot be imported (e.g. More...
 
unsigned Live: 1
 In per-module summary, indicate that the global value must be considered a live root for index-based liveness analysis. More...
 
unsigned DSOLocal: 1
 Indicates that the linker resolved the symbol to a definition from within the same linkage unit. More...
 
unsigned CanAutoHide: 1
 In the per-module summary, indicates that the global value is linkonce_odr and global unnamed addr (so eligible for auto-hiding via hidden visibility). More...
 

Detailed Description

Group flags (Linkage, NotEligibleToImport, etc.) as a bitfield.

Definition at line 296 of file ModuleSummaryIndex.h.

Constructor & Destructor Documentation

◆ GVFlags()

llvm::GlobalValueSummary::GVFlags::GVFlags ( GlobalValue::LinkageTypes  Linkage,
GlobalValue::VisibilityTypes  Visibility,
bool  NotEligibleToImport,
bool  Live,
bool  IsLocal,
bool  CanAutoHide 
)
inlineexplicit

Convenience Constructors.

Definition at line 336 of file ModuleSummaryIndex.h.

Member Data Documentation

◆ CanAutoHide

unsigned llvm::GlobalValueSummary::GVFlags::CanAutoHide

In the per-module summary, indicates that the global value is linkonce_odr and global unnamed addr (so eligible for auto-hiding via hidden visibility).

In the combined summary, indicates that the prevailing linkonce_odr copy can be auto-hidden via hidden visibility when it is upgraded to weak_odr in the backend. This is legal when all copies are eligible for auto-hiding (i.e. all copies were linkonce_odr global unnamed addr. If any copy is not (e.g. it was originally weak_odr, we cannot auto-hide the prevailing copy as it means the symbol was externally visible.

Definition at line 333 of file ModuleSummaryIndex.h.

Referenced by getEncodedGVSummaryFlags().

◆ DSOLocal

unsigned llvm::GlobalValueSummary::GVFlags::DSOLocal

Indicates that the linker resolved the symbol to a definition from within the same linkage unit.

Definition at line 322 of file ModuleSummaryIndex.h.

Referenced by getEncodedGVSummaryFlags().

◆ Linkage

unsigned llvm::GlobalValueSummary::GVFlags::Linkage

The linkage type of the associated global value.

One use is to flag values that have local linkage types and need to have module identifier appended before placing into the combined index, to disambiguate from other values with the same name. In the future this will be used to update and optimize linkage types based on global summary-based analysis.

Definition at line 304 of file ModuleSummaryIndex.h.

Referenced by getEncodedGVSummaryFlags().

◆ Live

unsigned llvm::GlobalValueSummary::GVFlags::Live

In per-module summary, indicate that the global value must be considered a live root for index-based liveness analysis.

Used for special LLVM values such as llvm.global_ctors that the linker does not know about.

In combined summary, indicate that the global value is live.

Definition at line 318 of file ModuleSummaryIndex.h.

Referenced by getEncodedGVSummaryFlags().

◆ NotEligibleToImport

unsigned llvm::GlobalValueSummary::GVFlags::NotEligibleToImport

Indicate if the global value cannot be imported (e.g.

it cannot be renamed or references something that can't be renamed).

Definition at line 311 of file ModuleSummaryIndex.h.

Referenced by getEncodedGVSummaryFlags().

◆ Visibility

unsigned llvm::GlobalValueSummary::GVFlags::Visibility

Indicates the visibility.

Definition at line 307 of file ModuleSummaryIndex.h.

Referenced by getEncodedGVSummaryFlags().


The documentation for this struct was generated from the following file: