st/xlib: Generate errors as specified.

Tested with piglit glx tests.

Reviewed-by: Brian Paul <brianp@vmware.com>
st/wgl: Implement WGL_EXT_create_context_es/es2_profile.

Derived from st/glx's GLX_EXT_create_context_es/es2_profile implementation.

Tested with an OpenGL ES 2.0 ApiTrace.

Reviewed-by: Brian Paul <brianp@vmware.com>
i965: Refactor fs_generator API

We split out SIMD8 and SIMD16 generation into seperate calls to
new method generate_code(), which returns the start offset for the
generated code.  A new get_assembly() method returns the generated code.

This avoids asserting MESA_SHADER_FRAGMENT and accessing wm_prog_data
in the generator.

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
i965: Move more code into codegen-branch of the fs_visitor::run() if statement

These last few operations all only apply when we've actually generated
code, optimized and allocated registers.  The dummy and the repclear
shaders don't need the gen4 send workaround, and don't spill.  This
means we can move these lines into the else-branch, which will make
the following refactoring easier.

v2 (Ken): Rebase on master, which removed the uncompressed stack.

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
i965: Move fs_visitor optimization pass into new method fs_visitor::optimize()

We'll reuse this toplevel optimization driver for the scalar VS.

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
i965: Move fs_visitor ra pass to new fs_visitor::allocate_registers()

This will be reused for the scalar VS pass.

v2 (Ken): Rebase on master.

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>