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cmd/gc: fix bad checknil with ints on 32 bit compilers
Fixes #7413. LGTM=rsc R=remyoudompheng CC=golang-codereviews, r, rsc https://golang.org/cl/69180044
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@ -471,8 +471,8 @@ cgen_checknil(Node *n)
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if(disable_checknil)
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if(disable_checknil)
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return;
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return;
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// Ideally we wouldn't see any TUINTPTR here, but we do.
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// Ideally we wouldn't see any integer types here, but we do.
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if(n->type == T || (!isptr[n->type->etype] && n->type->etype != TUINTPTR && n->type->etype != TUNSAFEPTR)) {
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if(n->type == T || (!isptr[n->type->etype] && !isint[n->type->etype] && n->type->etype != TUNSAFEPTR)) {
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dump("checknil", n);
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dump("checknil", n);
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fatal("bad checknil");
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fatal("bad checknil");
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}
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}
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24
test/nilptr4.go
Normal file
24
test/nilptr4.go
Normal file
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@ -0,0 +1,24 @@
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// build
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// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test that the compiler does not crash during compilation.
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package main
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import "unsafe"
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// Issue 7413
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func f1() {
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type t struct {
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i int
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}
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var v *t
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_ = int(uintptr(unsafe.Pointer(&v.i)))
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_ = int32(uintptr(unsafe.Pointer(&v.i)))
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}
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func main() {}
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