This unit test demonstrates a subtle bug fixed by
4ddf51db6af36736d5d42c1043eeea86e47459ce.
Signed-off-by: Chia-I Wu o...@lunarg.com
Cc: Eric Anholt e...@anholt.net
---
.../dri/i965/test_vec4_copy_propagation.cpp| 30 ++
1 file changed, 30 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/test_vec4_copy_propagation.cpp
b/src/mesa/drivers/dri/i965/test_vec4_copy_propagation.cpp
index cb70096..fd517f8 100644
--- a/src/mesa/drivers/dri/i965/test_vec4_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/test_vec4_copy_propagation.cpp
@@ -154,3 +154,33 @@ TEST_F(copy_propagation_test, test_swizzle_swizzle)
SWIZZLE_X,
SWIZZLE_Y));
}
+
+TEST_F(copy_propagation_test, test_swizzle_writemask)
+{
+ dst_reg a = dst_reg(v, glsl_type::vec4_type);
+ dst_reg b = dst_reg(v, glsl_type::vec4_type);
+ dst_reg c = dst_reg(v, glsl_type::vec4_type);
+
+ v-emit(v-MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_X,
+ SWIZZLE_Y,
+ SWIZZLE_X,
+ SWIZZLE_Z;
+
+ v-emit(v-MOV(writemask(a, WRITEMASK_XYZ), src_reg(1.0f)));
+
+ vec4_instruction *test_mov =
+ v-MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_W,
+ SWIZZLE_W,
+ SWIZZLE_W,
+ SWIZZLE_W)));
+ v-emit(test_mov);
+
+ copy_propagation(v);
+
+ /* should not copy propagate */
+ EXPECT_EQ(test_mov-src[0].reg, b.reg);
+ EXPECT_EQ(test_mov-src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_W,
+SWIZZLE_W,
+SWIZZLE_W,
+SWIZZLE_W));
+}
--
1.8.5.3
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