pgo

type CallSiteInfo struct {
	LineOffset int // Line offset from function start line.
	Caller     *ir.Func
	Callee     *ir.Func
}

type IREdge struct {
	// Source and destination of the edge in IRNode.
	Src, Dst       *IRNode
	Weight         int64
	CallSiteOffset int // Line offset from function start line.
}

type IRGraph struct {
	// Nodes of the graph
	IRNodes map[string]*IRNode
}

type IRNode struct {
	// Pointer to the IR of the Function represented by this node.
	AST *ir.Func
	// Linker symbol name of the Function represented by this node.
	// Populated only if AST == nil.
	LinkerSymbolName string

	// Set of out-edges in the callgraph. The map uniquely identifies each
	// edge based on the callsite and callee, for fast lookup.
	OutEdges map[NodeMapKey]*IREdge
}

type NodeMapKey struct {
	CallerName     string
	CalleeName     string
	CallSiteOffset int // Line offset from function start line.
}

type Profile struct {
	// Aggregated NodeWeights and EdgeWeights across the profile. This
	// helps us determine the percentage threshold for hot/cold
	// partitioning.
	TotalNodeWeight int64
	TotalEdgeWeight int64

	// NodeMap contains all unique call-edges in the profile and their
	// aggregated weight.
	NodeMap map[NodeMapKey]*Weights

	// WeightedCG represents the IRGraph built from profile, which we will
	// update as part of inlining.
	WeightedCG *IRGraph
}

type Weights struct {
	NFlat   int64
	NCum    int64
	EWeight int64
}