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panfrost: Don't allocate space for empty varyings

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PIPE_FORMAT_NONE has a block size of 1, oddly, but we don't actually
need to allocate any space for it. This acts as a small optimization for
a few shaders with the new varying linker.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19363>
This commit is contained in:
Alyssa Rosenzweig 2022-11-02 10:49:22 -04:00 • committed by Marge Bot
parent d0281fc16a
commit 93bf7104d0
1 changed files with 4 additions and 3 deletions
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7
src/gallium/drivers/panfrost/pan_cmdstream.c
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@ -2404,11 +2404,12 @@ pan_assign_varyings(const struct panfrost_device *dev,
for (unsigned i = 0; i < producer_count; ++i) {
signed loc = pan_find_vary(consumer_vars, consumer_count,
producer_vars[i].location);
enum pipe_format format = loc >= 0 ?
consumer_vars[loc].format :
PIPE_FORMAT_NONE;
if (loc >= 0) {
if (format != PIPE_FORMAT_NONE) {
offsets[i] = stride;
enum pipe_format format = consumer_vars[loc].format;
stride += util_format_get_blocksize(format);
} else {
offsets[i] = -1;