Add a placeholder instruction to track texture fetches made prior to FS
shader dispatch. These, like meta:input instructions are scheduled
before any real instructions, so that RA realizes their result values
are live before the first real instruction. And to give legalize a way
to track usage of fetched sample requiring (sy) sync flags.
There is some related special handling for varying texcoord inputs used
for pre-fs-fetch, so that they are not DCE'd and remain in linkage
between FS and previous stage. Note that we could almost avoid this
special handling by giving meta:tex_prefetch real src arguments, except
that in the FS stage, inputs are actual bary.f/ldlv instructions.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
An instruction can reference only a single address register value.
Add an assert to catch bugs.
Also, address value should also be local to the same block as the
instruction.
(The one spot where changing the instruction address is actually legit
needs to clear the address first.)
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
The live_values and use_count was not being properly updated. This
starts triggering problems with the next patch, where we allow copy
propagation for RELATIV access.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
The aren't real instructions, and don't change # of live values, so no
point in them competing with real instructions.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
For instructions that increase the # of live values, apply a threshold
to avoid scheduling them too early. And factor the net change of # of
live values that would result from scheduling an instruction, to
prioritize instructions that reduce number of live values as the number
of live values increases.
For manhattan:
total instructions in shared programs: 27869 -> 28413 (1.95%)
instructions in affected programs: 26756 -> 27300 (2.03%)
helped: 102
HURT: 87
total full in shared programs: 1903 -> 1719 (-9.67%)
full in affected programs: 1390 -> 1206 (-13.24%)
helped: 124
HURT: 9
The reduction in register usage nets ~20% gain in manhattan. (So
getting mediump support should be a huge win for gles gfxbench.)
Also significantly helps some of the more complex shadertoy shaders,
like IQ's Piano (32 to 18 regs, doubles fps).
The effect is less pronounced on smaller shaders.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Account for shader outputs and values live in any direct/indirect
successor block.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Not sure why new-style frag inputs start triggering this. But we
probably shouldn't consider src's from other blocks.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Not a perfect solution, and the "pressure" target is hard-coded. But it
doesn't really seem to much in the common case, and avoids exploding
register usage in dEQP ssbo tests.
So this should serve as a stop-gap solution until I have time to re-
write the scheduler.
Hurts slightly in instruction count, but gains (reduces) slightly the
register usage in shader-db. Fixes ~150 dEQP-GLES31.functional.ssbo.*
that were failing due to RA fail.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Move (most of) the ir3 compiler to src/freedreno/ir3 so that it can be
re-used by some future vulkan driver. The parts that are gallium
specific have been refactored out and remain in the gallium driver.
Getting the move done now so that it can happen before further
refactoring to support a6xx specific instructions.
NOTE also removes ir3_cmdline compiler tool from autotools build since
that was easier than fixing it and I normally use meson build. Waiting
patiently for the day that we can remove *everything* from the autotools
build.
Signed-off-by: Rob Clark <robdclark@gmail.com>
2018-11-27 15:44:02 -05:00
Renamed from src/gallium/drivers/freedreno/ir3/ir3_sched.c (Browse further)
Timothy Arceri
Rob Clark
Rob Clark