From: Rob Clark <robdclark@chromium.org>
Date: Mon, 9 Mar 2020 21:20:50 +0000 (-0700)
Subject: util/ra: move NO_REG to header
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=dd2e050a8422aed2f4de601b3894cbba94ba30bb;p=mesa.git

util/ra: move NO_REG to header

In the select_reg callback, I want to be able to determine if a given
node is already assigned, and if so what physical register has been
assigned.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4071>
---

diff --git a/src/util/register_allocate.c b/src/util/register_allocate.c
index 56517b5161c..4e97d82f23e 100644
--- a/src/util/register_allocate.c
+++ b/src/util/register_allocate.c
@@ -78,8 +78,6 @@
 #include "util/bitset.h"
 #include "register_allocate.h"
 
-#define NO_REG ~0U
-
 struct ra_reg {
    BITSET_WORD *conflicts;
    unsigned int *conflict_list;
diff --git a/src/util/register_allocate.h b/src/util/register_allocate.h
index 7d8459b1eff..c01f4aee47a 100644
--- a/src/util/register_allocate.h
+++ b/src/util/register_allocate.h
@@ -114,6 +114,10 @@ void ra_reset_node_interference(struct ra_graph *g, unsigned int n);
 /** @{ Graph-coloring register allocation */
 bool ra_allocate(struct ra_graph *g);
 
+#define NO_REG ~0U
+/**
+ * Returns NO_REG for a node that has not (yet) been assigned.
+ */
 unsigned int ra_get_node_reg(struct ra_graph *g, unsigned int n);
 void ra_set_node_reg(struct ra_graph * g, unsigned int n, unsigned int reg);
 void ra_set_node_spill_cost(struct ra_graph *g, unsigned int n, float cost);