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-rw-r--r--src/gallium/drivers/nvc0/nvc0_pc_regalloc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/gallium/drivers/nvc0/nvc0_pc_regalloc.c b/src/gallium/drivers/nvc0/nvc0_pc_regalloc.c
index d7213949483..f4afe083e2d 100644
--- a/src/gallium/drivers/nvc0/nvc0_pc_regalloc.c
+++ b/src/gallium/drivers/nvc0/nvc0_pc_regalloc.c
@@ -87,6 +87,9 @@ add_range_ex(struct nv_value *val, int bgn, int end, struct nv_range *new_range)
{
struct nv_range *range, **nextp = &val->livei;
+ if (bgn == end) /* [a, a) is invalid / empty */
+ return TRUE;
+
for (range = val->livei; range; range = range->next) {
if (end < range->bgn)
break; /* insert before */