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cmd/6g: restore magic multiply for /=, %=.

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Also enables turning /= 2 in a right shift.

Part of issue 2230.

R=rsc
CC=golang-dev, remy
https://golang.org/cl/6012049
This commit is contained in:
Rémy Oudompheng 2012-04-13 10:12:31 +02:00
parent 08f919f462
commit 061061e77c
1 changed files with 3 additions and 1 deletions
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4
src/cmd/6g/ggen.c
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@ -389,7 +389,9 @@ cgen_asop(Node *n)
hard:
n2.op = 0;
n1.op = 0;
if(nr->ullman >= nl->ullman || nl->addable) {
if(nr->op == OLITERAL) {
// don't allocate a register for literals.
} else if(nr->ullman >= nl->ullman || nl->addable) {
regalloc(&n2, nr->type, N);
cgen(nr, &n2);
nr = &n2;