Mesa (main): pan/bi: Make bi_index padding explicit

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Module: Mesa
Branch: main
Commit: 238f6d80a70b937890253507c5f1b3b9b5b494bc
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=238f6d80a70b937890253507c5f1b3b9b5b494bc

Author: Alyssa Rosenzweig <alyssa at collabora.com>
Date:   Fri Nov 12 11:11:25 2021 -0500

pan/bi: Make bi_index padding explicit

Avoids reliance on UB.

Signed-off-by: Alyssa Rosenzweig <alyssa at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13723>

---

 src/panfrost/bifrost/compiler.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index a734c60ea28..b3e8a4808cc 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -132,6 +132,9 @@ typedef struct {
         uint32_t offset : 2;
         bool reg : 1;
         enum bi_index_type type : 3;
+
+        /* Must be zeroed so we can hash the whole 64-bits at a time */
+        unsigned padding : (32 - 13);
 } bi_index;
 
 static inline bi_index