mirror of
https://github.com/golang/go
synced 2024-11-21 21:44:40 -07:00
parent
f30719dc89
commit
092a211fb9
@ -213,11 +213,11 @@ cgen(Node *n, Node *res)
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goto ret;
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case OMINUS:
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regalloc(&n1, nl->type, N);
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cgen(nl, &n1);
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nodconst(&n3, nl->type, 0);
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regalloc(&n2, nl->type, res);
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regalloc(&n1, nl->type, N);
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gmove(&n3, &n2);
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cgen(nl, &n1);
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gins(optoas(OSUB, nl->type), &n1, &n2);
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gmove(&n2, res);
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regfree(&n1);
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26
test/fixedbugs/bug368.go
Normal file
26
test/fixedbugs/bug368.go
Normal file
@ -0,0 +1,26 @@
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// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2011 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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package main
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// 5g bug used to set up the 0 for -f() before calling f,
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// and the call to f smashed the register.
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func f(n int) int {
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s := 0
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for i := 0; i < n; i++ {
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s += i>>1
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}
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return s
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}
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func main() {
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x := -f(100)
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if x != -2450 {
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println(x)
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panic("broken")
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}
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}
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