From a1011d63ffb5cc4f41bf0f4622ee3f1493d419d9 Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Sat, 29 Nov 2014 12:40:08 +0100
Subject: fontconfig libX11 libxcb libxcb/xcb-proto mesa xserver xkbcomp
 xkeyboard-config git update 29 Nov 2014

xserver          commit c52a2b1ebad56820af932dfbc871701a8b04fd9c
libxcb           commit bbca7b82f803fa13fd30a2891ec06f2a213a28c2
libxcb/xcb-proto commit 691d2b97e5989d6d7006304d81bd8fa128477ca1
xkeyboard-config commit b664d7fb8aab9b0f834dd9c81d273c7809561b34
libX11           commit f3831dde6972e4da9e018c6a5f4013d8756a5e78
xkbcomp          commit 1e8ee9d0aad072f04186df84752f5636340574e0
fontconfig       commit b732bf057f4b3ec3bac539803005e9c42d056b2a
mesa             commit 67c498086d0858a94d53ebb6921cfda847250368
---
 mesalib/src/glsl/opt_algebraic.cpp | 49 ++++++++++++++++++++++----------------
 1 file changed, 28 insertions(+), 21 deletions(-)

(limited to 'mesalib/src/glsl/opt_algebraic.cpp')

diff --git a/mesalib/src/glsl/opt_algebraic.cpp b/mesalib/src/glsl/opt_algebraic.cpp
index 0cdb8ecfc..430f5cb97 100644
--- a/mesalib/src/glsl/opt_algebraic.cpp
+++ b/mesalib/src/glsl/opt_algebraic.cpp
@@ -104,12 +104,6 @@ is_vec_negative_one(ir_constant *ir)
    return (ir == NULL) ? false : ir->is_negative_one();
 }
 
-static inline bool
-is_vec_basis(ir_constant *ir)
-{
-   return (ir == NULL) ? false : ir->is_basis();
-}
-
 static inline bool
 is_valid_vec_const(ir_constant *ir)
 {
@@ -537,21 +531,34 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
       if (is_vec_zero(op_const[0]) || is_vec_zero(op_const[1]))
 	 return ir_constant::zero(mem_ctx, ir->type);
 
-      if (is_vec_basis(op_const[0])) {
-	 unsigned component = 0;
-	 for (unsigned c = 0; c < op_const[0]->type->vector_elements; c++) {
-	    if (op_const[0]->value.f[c] == 1.0)
-	       component = c;
-	 }
-	 return new(mem_ctx) ir_swizzle(ir->operands[1], component, 0, 0, 0, 1);
-      }
-      if (is_vec_basis(op_const[1])) {
-	 unsigned component = 0;
-	 for (unsigned c = 0; c < op_const[1]->type->vector_elements; c++) {
-	    if (op_const[1]->value.f[c] == 1.0)
-	       component = c;
-	 }
-	 return new(mem_ctx) ir_swizzle(ir->operands[0], component, 0, 0, 0, 1);
+      for (int i = 0; i < 2; i++) {
+         if (!op_const[i])
+            continue;
+
+         unsigned components[4] = { 0 }, count = 0;
+
+         for (unsigned c = 0; c < op_const[i]->type->vector_elements; c++) {
+            if (op_const[i]->value.f[c] == 0.0)
+               continue;
+
+            components[count] = c;
+            count++;
+         }
+
+         /* No channels had zero values; bail. */
+         if (count >= op_const[i]->type->vector_elements)
+            break;
+
+         ir_expression_operation op = count == 1 ?
+            ir_binop_mul : ir_binop_dot;
+
+         /* Swizzle both operands to remove the channels that were zero. */
+         return new(mem_ctx)
+            ir_expression(op, glsl_type::float_type,
+                          new(mem_ctx) ir_swizzle(ir->operands[0],
+                                                  components, count),
+                          new(mem_ctx) ir_swizzle(ir->operands[1],
+                                                  components, count));
       }
       break;
 
-- 
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