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gc: fix crash for nested complex division

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R=ken2
CC=golang-dev
https://golang.org/cl/1720043
This commit is contained in:
Russ Cox 2010-06-23 10:55:50 -04:00
parent 6e83100ae5
commit 6d8b8101ea
2 changed files with 7 additions and 1 deletions
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2
src/cmd/gc/cplx.c
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@ -184,6 +184,7 @@ complexgen(Node *n, Node *res)
case OINDEX: case OINDEX:
case OIND: case OIND:
case ONAME: // PHEAP or PPARAMREF var case ONAME: // PHEAP or PPARAMREF var
case OCALLFUNC:
igen(n, &n1, res); igen(n, &n1, res);
complexmove(&n1, res); complexmove(&n1, res);
regfree(&n1); regfree(&n1);
@ -245,7 +246,6 @@ complexgen(Node *n, Node *res)
case OMUL: case OMUL:
complexmul(nl, nr, res); complexmul(nl, nr, res);
break; break;
// ODIV call a runtime function
} }
} }

6
test/ken/cplx4.go
View file

@ -35,4 +35,10 @@ func main() {
// real, imag, cmplx // real, imag, cmplx
c3 := cmplx(real(c2)+3, imag(c2)-5) + c2 c3 := cmplx(real(c2)+3, imag(c2)-5) + c2
fmt.Printf("c = %G\n", c3) fmt.Printf("c = %G\n", c3)
// compiler used to crash on nested divide
c4 := cmplx(real(c3/2), imag(c3/2))
if c4 != c3/2 {
fmt.Printf("c3 = %G != c4 = %G\n", c3, c4)
}
} }