From e1511f1d4c3949b107fda284ea9117632b9ef61d Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Thu, 9 May 2019 17:05:31 -0500 Subject: [PATCH] util/ra: Only update q_total if the reg is not assigned We only use q_total if the reg is not assigned so there's no point in updating it if the reg is not assigned. This has no known perf benefit but it will reduce churn in a future commit. Reviewed-by: Eric Anholt --- src/util/register_allocate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/util/register_allocate.c b/src/util/register_allocate.c index 9493f578dba..0c62ad3865c 100644 --- a/src/util/register_allocate.c +++ b/src/util/register_allocate.c @@ -484,7 +484,7 @@ decrement_q(struct ra_graph *g, unsigned int n) unsigned int n2 = g->nodes[n].adjacency_list[i]; unsigned int n2_class = g->nodes[n2].class; - if (!BITSET_TEST(g->in_stack, n2)) { + if (!BITSET_TEST(g->in_stack, n2) && g->nodes[n2].reg == NO_REG) { assert(g->nodes[n2].q_total >= g->regs->classes[n2_class]->q[n_class]); g->nodes[n2].q_total -= g->regs->classes[n2_class]->q[n_class]; } -- 2.30.2