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Current Path: /opt/golang/1.19.4/src/cmd/compile/internal/escape

opt / golang / 1.19.4 / src / cmd / compile / internal / escape /

📁 ..
📄 assign.go(2.95 KB)
📄 call.go(12.61 KB)
📄 desugar.go(1.16 KB)
📄 escape.go(12.31 KB)
📄 expr.go(8.78 KB)
📄 graph.go(8.15 KB)
📄 leaks.go(2.58 KB)
📄 solve.go(7.84 KB)
📄 stmt.go(4.69 KB)
📄 utils.go(6.3 KB)

Editing: desugar.go

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package escape

import (
	"cmd/compile/internal/base"
	"cmd/compile/internal/ir"
	"cmd/compile/internal/typecheck"
	"cmd/compile/internal/types"
)

// TODO(mdempsky): Desugaring doesn't belong during escape analysis,
// but for now it's the most convenient place for some rewrites.

// fixRecoverCall rewrites an ORECOVER call into ORECOVERFP,
// adding an explicit frame pointer argument.
// If call is not an ORECOVER call, it's left unmodified.
func fixRecoverCall(call *ir.CallExpr) {
	if call.Op() != ir.ORECOVER {
		return
	}

pos := call.Pos()

// FP is equal to caller's SP plus FixedFrameSize.
	var fp ir.Node = ir.NewCallExpr(pos, ir.OGETCALLERSP, nil, nil)
	if off := base.Ctxt.Arch.FixedFrameSize; off != 0 {
		fp = ir.NewBinaryExpr(fp.Pos(), ir.OADD, fp, ir.NewInt(off))
	}
	// TODO(mdempsky): Replace *int32 with unsafe.Pointer, without upsetting checkptr.
	fp = ir.NewConvExpr(pos, ir.OCONVNOP, types.NewPtr(types.Types[types.TINT32]), fp)

call.SetOp(ir.ORECOVERFP)
	call.Args = []ir.Node{typecheck.Expr(fp)}
}

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Editing: desugar.go

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