From: Francisco Jerez <currojerez@riseup.net>
Date: Wed, 18 Mar 2015 13:45:16 +0000 (+0200)
Subject: i965/vec4: Don't lose copy propagation saturate bits for not written components.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=18dc59c21295a2a4acf4b69cb7e7ea502c8dd8c8;p=mesa.git

i965/vec4: Don't lose copy propagation saturate bits for not written components.

Reviewed-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
---

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 036706c6ef5..a1050bb1333 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
@@ -437,7 +437,7 @@ vec4_visitor::opt_copy_propagation(bool do_constant_prop)
 	  * the new value, so clear it.
 	  */
 	 bool direct_copy = is_direct_copy(inst);
-	 entries[reg].saturatemask = 0x0;
+         entries[reg].saturatemask &= ~inst->dst.writemask;
 	 for (int i = 0; i < 4; i++) {
 	    if (inst->dst.writemask & (1 << i)) {
                entries[reg].value[i] = direct_copy ? &inst->src[0] : NULL;