[Mesa-dev] [PATCH 00/19] i965/fs: load_payload on Gen7+.

[Matt Turner]

Here's a respin of my load_payload series from mid-April with some
feedback from Ken addressed and some bugs fixed.

This series is available in my tree (with a few unrelated patches
before it)

   git://people.freedesktop.org/~mattst88/mesa tex-sources

This is a prep series for implementing SSA in the i965 fragment
shader backend.

I haven't done any testing on Gen < 7, but I think everything
should still work afterward on those platforms. While we won't
generate load_payload instructions from the texture visitor, we
may generate them from the cubemap fixup and from CSE. Both should
be safe since their destinations are generate purpose registers,
not MRFs.

I'd be nice to extend this to MRFs, since as I've planned it this
work will be necessary for SSA in the fs backend.

total instructions in shared programs: 1686122 -> 1677922 (-0.49%)
instructions in affected programs:     635490 -> 627290 (-1.29%)
GAINED:                                20
LOST:                                  0

A small handful of shaders gain an extra instruction or two.

I'd really like to get some R-b tags this time around, since this
series is necessary for the SSA work I've been anxious to get back to
for a while.

i965/fs: Add and use an fs_inst copy constructor.
i965/fs: Disable fs_inst assignment operator.
i965/fs: ralloc fs_inst's fs_reg sources.
i965/fs: Store the number of sources an fs_inst has.
i965/fs: Loop from 0 to inst->sources, not 0 to 3.
i965/fs: Clean up fs_inst constructors.
i965/fs: Add a function to resize fs_inst's sources
i965/fs: Add fs_inst constructor that takes a list of

   Preparatory work and infrastructure for instructions with
   variable numbers of sources.

i965/fs: Add SHADER_OPCODE_LOAD_PAYLOAD.
i965/fs: Lower LOAD_PAYLOAD and clean up.
i965/fs: Use LOAD_PAYLOAD in emit_texture_gen7().
i965/fs: Apply cube map array fixup and restore the

   The main implementation of load_payload on Gen7.

i965/fs: Only consider real sources when comparing
i965/fs: Emit load_payload instead of multiple MOVs for
i965/fs: Support register coalescing on LOAD_PAYLOAD
i965/fs: Perform CSE on load_payload instructions if
i965/fs: Copy propagate from load_payload.

   A series of patches to teach our optimization passes
   about the new virtual instruction.

i965/fs: Perform CSE on texture operations.
i965/fs: Optimize SEL with the same sources into a MOV.

   A couple more optimizations enabled by this series.