[Mesa-dev] [PATCH 1/2] mesa/st: Don't copy propagate from swizzles.

Do not propagate a copy if source and destination are identical. Otherwise code like MOV TEMP[0].xyzw, TEMP[0].wzyx MOV TEMP[1].xyzw, TEMP[0].xyzw is changed to MOV TEMP[0].xyzw, TEMP[0].wzyx MOV TEMP[1].xyzw, TEMP[0].wzyx This fixes Piglit test shaders/glsl-copy-propagation-self-2 for gallium

[Mesa-dev] [PATCH 1/2] mesa/st: Don't copy propagate from swizzles.

Do not propagate a copy if source and destination are identical. Otherwise code like MOV TEMP[0].xyzw, TEMP[0].wzyx MOV TEMP[1].xyzw, TEMP[0].xyzw is changed to MOV TEMP[0].xyzw, TEMP[0].wzyx MOV TEMP[1].xyzw, TEMP[0].wzyx This fixes Piglit test shaders/glsl-copy-propagation-self-2 for gallium