diff options
| -rw-r--r-- | src/compiler/glsl/linker.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp index d6f9c2d91ff..33fd76deae9 100644 --- a/src/compiler/glsl/linker.cpp +++ b/src/compiler/glsl/linker.cpp @@ -5079,6 +5079,16 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog) if(!link_varyings_and_uniforms(first, last, ctx, prog, mem_ctx)) goto done; + /* Linking varyings can cause some extra, useless swizzles to be generated + * due to packing and unpacking. + */ + for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { + if (prog->_LinkedShaders[i] == NULL) + continue; + + optimize_swizzles(prog->_LinkedShaders[i]->ir); + } + /* OpenGL ES < 3.1 requires that a vertex shader and a fragment shader both * be present in a linked program. GL_ARB_ES2_compatibility doesn't say * anything about shader linking when one of the shaders (vertex or |