llvm::IsConstantOffsetFromGlobal

Synopsis

Declared in <llvm/Analysis/ConstantFolding.h>

bool
IsConstantOffsetFromGlobal(
    Constant* C,
    GlobalValue*& GV,
    APInt& Offset,
    DataLayout const& DL,
    DSOLocalEquivalent** DSOEquiv = nullptr);

Description

Because of constantexprs, this function is recursive. If the global is part of a dso_local_equivalent constant, return it through DSOEquiv if it is provided.

Return Value

True if C is a constant offset from a global.

Parameters

Name	Description
C	Constant to inspect for a global-plus-offset form.
GV	Set to the base global value on success.
Offset	Set to the constant byte offset from `GV` on success.
DL	Data layout used for type sizes and pointer widths.
DSOEquiv	Optional out-parameter for a dso_local_equivalent wrapper.