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[dev.power64] cmd/9c: fix switch bug 

The cmd/cc bundled with 9c has additional code compared to our cmd/cc, and
without those code, 9c couldn't handle switch statement where the expression
is not just a simple int32 or int64 variable (e.g. g->status or int8 variable).

All credit goes to rsc.

LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/125840043
This commit is contained in:
Shenghou Ma 2014-08-07 18:34:25 -04:00
parent 4be75c8f26
commit 95e8a3a1da
1 changed files with 11 additions and 3 deletions
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14
src/cmd/9c/swt.c
View File

@ -32,11 +32,19 @@
void
swit1(C1 *q, int nc, int32 def, Node *n)
{
Node tn;
Node tn, nod;
regalloc(&nod, n, Z);
/* always signed */
if(typev[n->type->etype])
nod.type = types[TVLONG];
else
nod.type = types[TLONG];
cgen(n, &nod);
regalloc(&tn, &regnode, Z);
swit2(q, nc, def, n, &tn);
swit2(q, nc, def, &nod, &tn);
regfree(&tn);
regfree(&nod);
}
void