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nvc0: kick out empty live ranges
authorChristoph Bumiller <e0425955@student.tuwien.ac.at>
Tue, 22 Feb 2011 20:50:17 +0000 (21:50 +0100)
committerChristoph Bumiller <e0425955@student.tuwien.ac.at>
Thu, 24 Feb 2011 16:35:35 +0000 (17:35 +0100)
They affect overlap tests even though they're actually empty.

src/gallium/drivers/nvc0/nvc0_pc_regalloc.c patch | blob | history

diff --git a/src/gallium/drivers/nvc0/nvc0_pc_regalloc.c b/src/gallium/drivers/nvc0/nvc0_pc_regalloc.c
index d7213949483e88519fe842d26bcab5c6e9a0a17a..f4afe083e2dde92a32e1a79a21d9837c9b81c9fe 100644 (file)
--- 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 */