glsl: Fix continue statements in do-while loops.

From the GLSL 4.40 spec, section 6.4 (Jumps):

    The continue jump is used only in loops. It skips the remainder of
    the body of the inner most loop of which it is inside. For while
    and do-while loops, this jump is to the next evaluation of the
    loop condition-expression from which the loop continues as
    previously defined.

Previously, we incorrectly treated a "continue" statement as jumping
to the top of a do-while loop.

This patch fixes the problem by replicating the loop condition when
converting the "continue" statement to IR.  (We already do a similar
thing in "for" loops, to ensure that "continue" causes the loop
expression to be executed).

Fixes piglit tests:
- glsl-fs-continue-inside-do-while.shader_test
- glsl-vs-continue-inside-do-while.shader_test
- glsl-fs-continue-in-switch-in-do-while.shader_test
- glsl-vs-continue-in-switch-in-do-while.shader_test

Cc: mesa-stable@lists.freedesktop.org

Acked-by: Carl Worth <cworth@cworth.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
mesa: remove stray bits of GL_EXT_cull_vertex

GL_EXT_cull_vertex was removed back in 2010 in commit 02984e3536
but these bits still lingered.

Reviewed-by: Eric Anholt <eric@anholt.net>
gallium: remove PIPE_CAP_MAX_COMBINED_SAMPLERS

This can be derived from the shader caps.

All GPUs from ATI/AMD, NVIDIA, and INTEL have separate texture slots
for each shader stage.
r600g,radeonsi: treat DYNAMIC and STREAM usage as STAGING
r600g,radeonsi: skip busy-checking for DISCARD_RANGE if it has been done already
r600g,radeonsi: skip unnecessary buffer_is_busy call, add a comment
r600g: split streamout emit code into a separate function

For geometry shaders we need to call this code from a second place.

Just move it out for now to keep future patches cleaner.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
r600g: move barrier and end_of_program bits from output to cf struct (v2)

v2: fix regression on r600 NOP instructions.

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
r600g/bc: add support for indexed memory writes.

It looks like we need these for geom shaders in the future.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: defer shader variant selection and depending state updates

[airlied: fix dropped streamout line - fix for master]

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: add hw register definitions for GS block setup

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: initial support for geometry shaders on evergreen (v2)

This is Vadim's initial work with a few regression fixes squashed in.

v2: (airlied)
fix regression in glsl-max-varyings - need to use vs and ps_dirty
fix regression in shader exports from rebasing.
whitespace fixing.
v2.1: squash fix assert

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: don't fail if we can't map VS->GS ring entries

This can happen in normal operation, so don't report an error on it,
just continue.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g/sb: add MEM_RING support

Although we don't use SB on geom shaders, the VS copy shader will use it
so we might as well implement MEM_RING support in sb.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: don't enable SB for geom shaders

SB needs fixes for three GS instructions it seems to raise
them outside loops etc despite my best efforts.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: emit NOPs at end of shaders in more cases

If the shader has no CF clauses at all emit an nop
If the last instruction is an ENDLOOP add a NOP for the LOOP to go to
if the last instruction is CALL_FS add a NOP

These fix a bunch of hangs in the geometry shader tests.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: initialise the geom shader loop registers.

As we do for vertex and pixel shaders.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: increase array base for exported parameters

Trivial fix to Vadim's code.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g/gs: fix cases where number of gs inputs != number of gs outputs

this fixes a bunch of the geom shader built-in tests

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
r600g: emit streamout from dma copy shader

This enables streamout with GS in the mix, from the
VS dma shader.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>