cmd/compile: fix missing export/import init nodes of builtins that allow multiple arguments

Fixes #52590

Change-Id: Ibd0852ae2a9ad8e4598e93320daff1b3c196929f
Reviewed-on: https://go-review.googlesource.com/c/go/+/402854
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Keith Randall <khr@google.com>

src/cmd/compile/internal/typecheck/iexport.go

@@ -2001,6 +2001,7 @@ func (w *exportWriter) expr(n ir.Node) {
 		n := n.(*ir.BinaryExpr)
 		w.op(n.Op())
 		w.pos(n.Pos())
+		w.stmtList(n.Init())
 		w.expr(n.X)
 		w.expr(n.Y)
 		if go117ExportTypes {
@@ -2037,6 +2038,7 @@ func (w *exportWriter) expr(n ir.Node) {
 		n := n.(*ir.CallExpr)
 		w.op(n.Op())
 		w.pos(n.Pos())
+		w.stmtList(n.Init())
 		w.exprList(n.Args) // emits terminating OEND
 		// only append() calls may contain '...' arguments
 		if n.Op() == ir.OAPPEND {

src/cmd/compile/internal/typecheck/iimport.go

@@ -1552,20 +1552,25 @@ func (r *importReader) node() ir.Node {
 		return ir.NewConvExpr(r.pos(), op, r.typ(), r.expr())
 
 	case ir.OCOPY, ir.OCOMPLEX, ir.OREAL, ir.OIMAG, ir.OAPPEND, ir.OCAP, ir.OCLOSE, ir.ODELETE, ir.OLEN, ir.OMAKE, ir.ONEW, ir.OPANIC, ir.ORECOVER, ir.OPRINT, ir.OPRINTN, ir.OUNSAFEADD, ir.OUNSAFESLICE:
+		pos := r.pos()
 		if go117ExportTypes {
 			switch op {
 			case ir.OCOPY, ir.OCOMPLEX, ir.OUNSAFEADD, ir.OUNSAFESLICE:
-				n := ir.NewBinaryExpr(r.pos(), op, r.expr(), r.expr())
+				init := r.stmtList()
+				n := ir.NewBinaryExpr(pos, op, r.expr(), r.expr())
+				n.SetInit(init)
 				n.SetType(r.typ())
 				return n
 			case ir.OREAL, ir.OIMAG, ir.OCAP, ir.OCLOSE, ir.OLEN, ir.ONEW, ir.OPANIC:
-				n := ir.NewUnaryExpr(r.pos(), op, r.expr())
+				n := ir.NewUnaryExpr(pos, op, r.expr())
 				if op != ir.OPANIC {
 					n.SetType(r.typ())
 				}
 				return n
 			case ir.OAPPEND, ir.ODELETE, ir.ORECOVER, ir.OPRINT, ir.OPRINTN:
-				n := ir.NewCallExpr(r.pos(), op, nil, r.exprList())
+				init := r.stmtList()
+				n := ir.NewCallExpr(pos, op, nil, r.exprList())
+				n.SetInit(init)
 				if op == ir.OAPPEND {
 					n.IsDDD = r.bool()
 				}
@@ -1577,7 +1582,14 @@ func (r *importReader) node() ir.Node {
 			// ir.OMAKE
 			goto error
 		}
-		n := builtinCall(r.pos(), op)
+		n := builtinCall(pos, op)
+		switch n.Op() {
+		case ir.OCOPY, ir.OCOMPLEX, ir.OUNSAFEADD, ir.OUNSAFESLICE:
+			// treated like other builtin calls
+			fallthrough
+		case ir.OAPPEND, ir.ODELETE, ir.ORECOVER, ir.OPRINT, ir.OPRINTN:
+			n.SetInit(r.stmtList())
+		}
 		n.Args = r.exprList()
 		if op == ir.OAPPEND {
 			n.IsDDD = r.bool()

test/fixedbugs/issue52590.dir/a.go

@@ -0,0 +1,68 @@
+// Copyright 2022 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 a
+
+import "unsafe"
+
+func Append() {
+	_ = append(appendArgs())
+}
+
+func Delete() {
+	delete(deleteArgs())
+}
+
+func Print() {
+	print(ints())
+}
+
+func Println() {
+	println(ints())
+}
+
+func Complex() {
+	_ = complex(float64s())
+}
+
+func Copy() {
+	copy(slices())
+}
+
+func UnsafeAdd() {
+	_ = unsafe.Add(unsafeAdd())
+}
+
+func UnsafeSlice() {
+	_ = unsafe.Slice(unsafeSlice())
+}
+
+func appendArgs() ([]int, int) {
+	return []int{}, 0
+}
+
+func deleteArgs() (map[int]int, int) {
+	return map[int]int{}, 0
+}
+
+func ints() (int, int) {
+	return 1, 1
+}
+
+func float64s() (float64, float64) {
+	return 0, 0
+}
+
+func slices() ([]int, []int) {
+	return []int{}, []int{}
+}
+
+func unsafeAdd() (unsafe.Pointer, int) {
+	return nil, 0
+}
+
+func unsafeSlice() (*byte, int) {
+	var p [10]byte
+	return &p[0], 0
+}

test/fixedbugs/issue52590.dir/b.go

@@ -0,0 +1,18 @@
+// Copyright 2022 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 b
+
+import "./a"
+
+func f() {
+	a.Append()
+	a.Delete()
+	a.Print()
+	a.Println()
+	a.Complex()
+	a.Copy()
+	a.UnsafeAdd()
+	a.UnsafeSlice()
+}

test/fixedbugs/issue52590.go

@@ -0,0 +1,7 @@
+// compiledir
+
+// Copyright 2022 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 ignored