From b9cd3f5b493e6fe835f1a3a2216f29bc0a4a2a93 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Samuel=20Iglesias=20Gons=C3=A1lvez?= Date: Wed, 22 Jun 2016 15:13:45 +0200 Subject: [PATCH] i965/vec4: don't copy propagate misaligned registers MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This means we would copy propagate partial reads or writes and that can affect the result. Signed-off-by: Samuel Iglesias Gonsálvez Reviewed-by: Matt Turner --- src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp index 9b76f58fc67..e7f6f93f8bd 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp @@ -354,6 +354,9 @@ try_copy_propagate(const struct gen_device_info *devinfo, return false; } + if (inst->src[arg].offset % REG_SIZE || value.offset % REG_SIZE) + return false; + bool has_source_modifiers = value.negate || value.abs; /* gen6 math and gen7+ SENDs from GRFs ignore source modifiers on -- 2.30.2