We allocate them at the end of the register file and keep them separate
from normal VGPRs. This is for two reasons:
- Because we only ever move linear VGPRs into an empty space or a space
previously occupied by a linear one, we never have to swap a normal VGPR
and a linear one. This simplifies copy lowering.
- As linear VGPR's live ranges only start and end on top-level blocks, we
never have to move a linear VGPR in control flow.
fossil-db (navi31):
Totals from 5493 (6.93% of 79242) affected shaders:
MaxWaves: 150365 -> 150343 (-0.01%)
Instrs: 7974740 -> 7976073 (+0.02%); split: -0.06%, +0.08%
CodeSize: 41296024 -> 41299024 (+0.01%); split: -0.06%, +0.06%
VGPRs: 283192 -> 329560 (+16.37%)
Latency: 64267936 -> 64268414 (+0.00%); split: -0.17%, +0.17%
InvThroughput: 10954037 -> 10951735 (-0.02%); split: -0.09%, +0.07%
VClause: 132792 -> 132956 (+0.12%); split: -0.06%, +0.18%
SClause: 223854 -> 223841 (-0.01%); split: -0.01%, +0.01%
Copies: 559574 -> 561395 (+0.33%); split: -0.24%, +0.56%
Branches: 179630 -> 179636 (+0.00%); split: -0.02%, +0.02%
VALU: 4572683 -> 4574487 (+0.04%); split: -0.03%, +0.07%
SALU: 772076 -> 772111 (+0.00%); split: -0.01%, +0.01%
VOPD: 1095 -> 1099 (+0.37%); split: +0.73%, -0.37%
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27697>
061b8bfd29 moved handling of fixed operands earlier, but it should have
moved the fixing of writelane operands earlier too.
This fixes Crucible's func.uniform-subgroup.exclusive.imin64 on GFX8.
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Fixes: 061b8bfd29 ("aco/ra: rework fixed operands")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27583>
This moves all fixed operands at once, so they don't interfere with one
another.
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17493>
If def_reg is empty, then def_reg.lo() may be lower than bounds.lo() if
we're moving VGPRs and info.bounds will be invalid.
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17493>
Fixes dEQP-VK.ssbo.phys.layout.random.8bit.all_per_block_buffers.46 on
GFX8.
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12172>
This migration was done with libclang-based automatic tooling, which
performed these replacements:
* Operand(uint8_t) -> Operand::c8
* Operand(uint16_t) -> Operand::c16
* Operand(uint32_t, false) -> Operand::c32
* Operand(uint32_t, bool) -> Operand::c32_or_c64
* Operand(uint64_t) -> Operand::c64
* Operand(0) -> Operand::zero(num_bytes)
Casts that were previously used for constructor selection have automatically
been removed (e.g. Operand((uint16_t)1) -> Operand::c16(1)).
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11653>
