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cmd/compile: fix missing case for shape double-check function

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Missing case types.TUNSAFEPTR in parameterizedBy().

Also realized there was the same missing case in the type substituter
(*Tsubster).Typ().

Fixes #48103

Change-Id: If71f1a6ef80932f0e2120d4c18b39a30189fd8fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/346669
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
This commit is contained in:
Dan Scales 2021-08-31 19:06:46 -07:00
parent 62ba72b353
commit 2dd7b770de
3 changed files with 41 additions and 2 deletions
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2
src/cmd/compile/internal/noder/stencil.go
View File

@ -1917,7 +1917,7 @@ func parameterizedBy1(t *types.Type, params []*types.Type, visited map[*types.Ty
case types.TINT, types.TINT8, types.TINT16, types.TINT32, types.TINT64,
types.TUINT, types.TUINT8, types.TUINT16, types.TUINT32, types.TUINT64,
types.TUINTPTR, types.TBOOL, types.TSTRING, types.TFLOAT32, types.TFLOAT64, types.TCOMPLEX64, types.TCOMPLEX128:
types.TUINTPTR, types.TBOOL, types.TSTRING, types.TFLOAT32, types.TFLOAT64, types.TCOMPLEX64, types.TCOMPLEX128, types.TUNSAFEPTR:
return true
case types.TUNION:

2
src/cmd/compile/internal/typecheck/subr.go
View File

@ -1189,7 +1189,7 @@ func (ts *Tsubster) typ1(t *types.Type) *types.Type {
}
case types.TINT, types.TINT8, types.TINT16, types.TINT32, types.TINT64,
types.TUINT, types.TUINT8, types.TUINT16, types.TUINT32, types.TUINT64,
types.TUINTPTR, types.TBOOL, types.TSTRING, types.TFLOAT32, types.TFLOAT64, types.TCOMPLEX64, types.TCOMPLEX128:
types.TUINTPTR, types.TBOOL, types.TSTRING, types.TFLOAT32, types.TFLOAT64, types.TCOMPLEX64, types.TCOMPLEX128, types.TUNSAFEPTR:
newt = t.Underlying()
case types.TUNION:
nt := t.NumTerms()

39
test/typeparam/issue48013.go Normal file
View File

@ -0,0 +1,39 @@
// run -gcflags=-G=3
// 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 main
import (
"fmt"
"unsafe"
)
type S[T any] struct {
val T
}
// Test type substitution where base type is unsafe.Pointer
type U[T any] unsafe.Pointer
func test[T any]() T {
var q U[T]
var v struct {
// Test derived type that contains an unsafe.Pointer
p unsafe.Pointer
val T
}
_ = q
return v.val
}
func main() {
want := 0
got := test[int]()
if got != want {
panic(fmt.Sprintf("got %f, want %f", got, want))
}
}