Mesa (master): pan/bi: Fix off-by-one in RA

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Module: Mesa
Branch: master
Commit: b9121624fc6d59ceef5685dfdd54331b68d52005
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b9121624fc6d59ceef5685dfdd54331b68d52005

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Tue Nov 24 13:56:52 2020 -0500

pan/bi: Fix off-by-one in RA

Could result in trying to allocate R64 which is clearly wrong.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7615>

---

 src/panfrost/bifrost/bi_ra.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/panfrost/bifrost/bi_ra.c b/src/panfrost/bifrost/bi_ra.c
index 3d82edcf094..e605e1d5e7b 100644
--- a/src/panfrost/bifrost/bi_ra.c
+++ b/src/panfrost/bifrost/bi_ra.c
@@ -76,7 +76,7 @@ bi_allocate_registers(bi_context *ctx, bool *success)
         } else {
                 /* R0 - R63, all 32-bit */
                 l->class_start[BI_REG_CLASS_WORK] = 0;
-                l->class_size[BI_REG_CLASS_WORK] = 64 * 4;
+                l->class_size[BI_REG_CLASS_WORK] = 63 * 4;
         }
 
         bi_foreach_instr_global(ctx, ins) {