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gc: rewrite complex /= to l = l / r.

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Fixes #1368.

R=rsc, ejsherry
CC=golang-dev
https://golang.org/cl/3811042
This commit is contained in:
Patrick Gavlin 2011-01-04 13:14:17 -05:00 committed by Russ Cox
parent 71793d4b42
commit 4e5a59591b
2 changed files with 21 additions and 1 deletions
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4
src/cmd/gc/walk.c
View File

@ -975,13 +975,15 @@ walkexpr(Node **np, NodeList **init)
* on 386, rewrite float ops into l = l op r.
* everywhere, rewrite map ops into l = l op r.
* everywhere, rewrite string += into l = l op r.
* everywhere, rewrite complex /= into l = l op r.
* TODO(rsc): Maybe this rewrite should be done always?
*/
et = n->left->type->etype;
if((widthptr == 4 && (et == TUINT64 || et == TINT64)) ||
(thechar == '8' && isfloat[et]) ||
l->op == OINDEXMAP ||
et == TSTRING) {
et == TSTRING ||
(iscomplex[et] && n->etype == ODIV)) {
l = safeexpr(n->left, init);
a = l;
if(a->op == OINDEXMAP) {

18
test/fixedbugs/bug315.go Normal file
View File

@ -0,0 +1,18 @@
// $G $D/$F.go || echo BUG: bug315
// Copyright 2010 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.
// Issue 1368.
package main
func main() {
a := cmplx(2, 2)
a /= 2
}
/*
bug315.go:13: internal compiler error: optoas: no entry DIV-complex
*/