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8g: out of register bug

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Fixes #806.

R=ken2
CC=golang-dev
https://golang.org/cl/1281042
This commit is contained in:
Russ Cox 2010-05-24 17:22:51 -07:00
parent ea941f09bf
commit 6a060200cc
2 changed files with 27 additions and 4 deletions
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12
src/cmd/8g/cgen.c
View File

@ -10,6 +10,8 @@
void
mgen(Node *n, Node *n1, Node *rg)
{
Node n2;
n1->op = OEMPTY;
if(n->addable) {
@ -18,11 +20,13 @@ mgen(Node *n, Node *n1, Node *rg)
reg[n->val.u.reg]++;
return;
}
if(n->type->width > widthptr && !isfloat[n->type->etype])
tempname(n1, n->type);
else
regalloc(n1, n->type, rg);
tempname(n1, n->type);
cgen(n, n1);
if(n->type->width <= widthptr || isfloat[n->type->etype]) {
n2 = *n1;
regalloc(n1, n->type, rg);
gmove(&n2, n1);
}
}
void

19
test/fixedbugs/bug283.go Normal file
View File

@ -0,0 +1,19 @@
// $G $D/$F.go || echo BUG: should compile
// 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.
// http://code.google.com/p/go/issues/detail?id=806
// triggered out of registers on 8g
package main
type Point struct {
x int
y int
}
func dist(p0, p1 Point) float64 {
return float64((p0.x-p1.x)*(p0.x-p1.x) + (p0.y-p1.y)*(p0.y-p1.y))
}