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246 Commits

Author SHA1 Message Date
Conor McCarthy
075979fa21 vkd3d-shader/ir: Always check for undominated SSA use in register relative addresses. 2024-04-24 23:48:13 +02:00
Francisco Casas
d2427ea1bd vkd3d-shader/ir: Lower IFC instructions to IF instructions. 2024-04-24 23:48:05 +02:00
Henri Verbeet
46fca3f9f4 vkd3d-common: Introduce VKD3D_BITMAP_SIZE. 2024-04-23 22:41:25 +02:00
Conor McCarthy
e3dde09bb9 vkd3d-shader/ir: Accept undefined PHI incomings as valid. 
An incoming can be undefined if the PHI result is not used if the
incoming's path was taken, or if the undefined value is consumed by
an instruction (dxc will compile such code without errors).
 2024-04-23 22:37:33 +02:00
Giovanni Mascellani
6b841486d4 vkd3d-shader/ir: Materialize SSAs in each function of a hull shader. 2024-04-23 22:36:17 +02:00
Giovanni Mascellani
c8af142bb0 vkd3d-shader/ir: Structurize each function of a hull shader. 2024-04-23 22:36:16 +02:00
Giovanni Mascellani
d8e4b19cdc vkd3d-shader/ir: Skip invalid blocks when materializing undominated SSAs. 2024-04-23 22:36:14 +02:00
Conor McCarthy
4457181b2a vkd3d-shader/dxil: Support patch constant functions and signatures. 2024-04-22 23:13:26 +02:00
Henri Verbeet
e17e481130 vkd3d-shader/glsl: Call vkd3d_shader_normalise(). 2024-04-17 22:52:20 +02:00
Henri Verbeet
1d6c3eae78 vkd3d-shader/ir: Remove VKD3DSIH_DCL_CONSTANT_BUFFER instructions. 2024-04-16 22:18:52 +02:00
Giovanni Mascellani
a359c42795 vkd3d-shader/ir: Only emit launchers when needed. 2024-04-16 22:18:33 +02:00
Giovanni Mascellani
df4731dc17 vkd3d-shader/ir: Only emit trampolines when needed. 2024-04-16 22:18:26 +02:00
Giovanni Mascellani
d6ba8b88fa vkd3d-shader/ir: Swap selection branches if the if branch is empty. 2024-04-16 22:18:25 +02:00
Conor McCarthy
0515482e82 vkd3d-shader/ir: Validate tessellation declarations. 2024-04-16 22:18:18 +02:00
Conor McCarthy
23db066922 vkd3d-shader/ir: Implement MAD in two operations if flagged as precise. 
With some changes by Giovanni Mascellani.
 2024-04-15 21:33:35 +02:00
Giovanni Mascellani
9112a5be58 vkd3d-shader/ir: Move DCL_TEMPS removal to the generic instruction lowering pass. 2024-04-15 21:33:34 +02:00
Giovanni Mascellani
8a17a5a08b vkd3d-shader/ir: Introduce vsir_program_lower_instructions(). 
It is meant as generic pass to host all program changes to single
instructions that do not require keeping a global state, intstead
of having to loop through the whole program many times.
 2024-04-15 21:33:32 +02:00
Giovanni Mascellani
a7dc6dcce2 vkd3d-shader/ir: Split handling jumps when emitting a structured program. 2024-04-15 21:33:28 +02:00
Giovanni Mascellani
1a8a4c7787 vkd3d-shader/ir: Split handling selections when emitting a structured program. 2024-04-15 21:33:26 +02:00
Giovanni Mascellani
052df4d693 vkd3d-shader/ir: Split handling loops when emitting a structured program. 2024-04-15 21:33:16 +02:00
Giovanni Mascellani
5e42f6779a vkd3d-shader/ir: Split handling blocks when emitting a structured program. 2024-04-15 21:33:15 +02:00
Giovanni Mascellani
b4cfc24f67 vkd3d-shader/ir: Refactor declaration emission outside of the CFG structure. 
This is in preparation of handling more than one function (as
it happens for Hull Shaders), which will require having a single
row of declarations, but handling more than one CFG.
 2024-04-15 21:33:14 +02:00
Giovanni Mascellani
27801e5612 vkd3d-shader/ir: Split undominated SSA materialization. 2024-04-15 21:33:13 +02:00
Giovanni Mascellani
d891ac5017 vkd3d-shader/ir: Split program structurization. 2024-04-15 21:33:12 +02:00
Giovanni Mascellani
eb15f97083 vkd3d-shader/ir: Move breaks out of selections again after having optimized loops. 2024-04-15 21:33:08 +02:00
Giovanni Mascellani
be7eec75dc vkd3d-shader/ir: Append code to the non-breaking branch if there is breaking one. 2024-04-15 21:33:07 +02:00
Giovanni Mascellani
a2c6b5450b vkd3d-shader/ir: Prepare for changing the destination list in vsir_cfg_optimize_recurse(). 2024-04-15 21:33:05 +02:00
Giovanni Mascellani
aad040af05 vkd3d-shader/ir: Remove loops that terminate with a `break'. 2024-04-11 09:22:14 -05:00
Giovanni Mascellani
105ccc4769 vkd3d-shader/ir: Count how many jumps target each loop. 2024-04-11 09:22:13 -05:00
Giovanni Mascellani
f5d1b5d263 vkd3d-shader/ir: Move `break's out of selection constructs when possible. 2024-04-11 09:22:11 -05:00
Conor McCarthy
7d5e3713f9 vkd3d-shader/ir: Materialise SSAs to temps before lowering switch instructions. 2024-04-09 12:27:20 -05:00
Conor McCarthy
cfcd57209b vkd3d-shader/ir: Convert SSAs to temps only if the block of origin does not dominate all uses. 2024-04-09 12:27:19 -05:00
Conor McCarthy
7bfc7410f2 vkd3d-shader/ir: Materialise phis to temps in the incoming blocks. 
RADV converts temps to phi instructions, so converting phis to MOVC in
VSIR just translates back to phis feeding into a MOVC. This commit
eliminates the MOVC.
 2024-04-09 12:27:15 -05:00
Francisco Casas
2621fc9572 vkd3d-shader/ir: Add missing src swizzle in vsir_program_lower_texkills(). 2024-04-09 12:27:06 -05:00
Giovanni Mascellani
a278f32d3f vkd3d-shader/ir: Synthesize selection constructs from conditional jumps. 2024-04-04 22:19:19 +02:00
Giovanni Mascellani
0d13b6afe9 vkd3d-shader/ir: Remove trailing `continue's. 2024-04-04 22:19:18 +02:00
Giovanni Mascellani
d8414302e8 vkd3d-shader/ir: Move `continue's to the false branch when possible. 2024-04-04 22:19:16 +02:00
Giovanni Mascellani
e6c20361ea vkd3d-shader/ir: Drop a useless helper. 2024-04-03 22:23:08 +02:00
Giovanni Mascellani
9aff65c6d2 vkd3d-shader/ir: Open a loop when visiting the loop header. 
Not when making the loop header available, which is too early and
might lead to open too many loops at once.
 2024-04-03 22:23:06 +02:00
Giovanni Mascellani
d10031911d vkd3d-shader/ir: Move vsir_program_normalise() to the end of the file. 
vsir_program_normalise() has function calls to basically everything in
ir.c, so it's useful to have it in an easily reachable place to
quickly jump to wherever you need using your favorite code editor's
features.
 2024-04-02 23:10:07 +02:00
Henri Verbeet
5de5f241a6 vkd3d-shader/ir: Pass a struct vsir_program to vkd3d_shader_normalise(). 2024-03-19 22:57:56 +01:00
Giovanni Mascellani
e5f486edd3 vkd3d-shader/ir: Use type "unused" for labels. 
The label itself is certainly an unsigned integer, but the register
has no meaningful data type. It cannot be evaluated to anything.
The goal of this is to reduce cluttering in the internal ASM dumps.
 2024-03-18 23:07:45 +01:00
Giovanni Mascellani
8c15377ffc vkd3d-shader/ir: Emit multilevel jumps in the structured program. 
The new structurizer therefore reaches feature parity with the
older simple one, except for a couple of points:

 * the old structurizer accepts any CFG, without requiring reducibility;
   however, the DXIL specification requires the CFG to be reducible
   anyway, so we're not really losing anything;

 * the new structurizer additionally requires that no block has two
   incoming back arrows; AFAIK this is condition that can happen,
   but in practice it seems to be rare; also, it's not hard to add
   support for it, as soon as it is decided it is useful.

On the other hand, the new structurizer makes use of the merging
information that are reconstructed from the CFG, which is important
for downstream optimization and fundamental for correctly emitting
tangled instructions.

Taking these considerations into account, the old structurizer is
considered superseded and is therefore removed.
 2024-03-18 23:07:17 +01:00
Giovanni Mascellani
c2aa01de6e vkd3d-shader/ir: Emit the reconstructed structured program. 
Multilevel jumps are not supported yet, and trigger a fallback to the
simple structurizer.
 2024-03-18 23:07:15 +01:00
Henri Verbeet
abf76372e0 vkd3d-shader/ir: Pass a struct vsir_program to vsir_validate(). 2024-03-14 23:24:29 +01:00
Henri Verbeet
7af3e9300f vkd3d-shader/ir: Pass a struct vsir_program to flatten_control_flow_constructs(). 2024-03-14 23:24:28 +01:00
Henri Verbeet
268989f5b9 vkd3d-shader/ir: Pass a struct vsir_program to normalise_combined_samplers(). 2024-03-14 23:24:27 +01:00
Henri Verbeet
674bebe9c9 vkd3d-shader/ir: Pass a struct vsir_program to shader_normalise_io_registers(). 2024-03-14 23:24:24 +01:00
Giovanni Mascellani
d75dc76011 vkd3d-shader/ir: Dump the reconstructed structured program. 2024-03-14 22:48:53 +01:00
Giovanni Mascellani
2b3e21caeb vkd3d-shader/ir: Add jumps to the structured programs. 2024-03-14 22:48:52 +01:00
Giovanni Mascellani
c25e4c47c3 vkd3d-shader/ir: Reconstruct a structured program. 
For simplicity jumps are not currently processed.
 2024-03-14 22:48:50 +01:00
Henri Verbeet
5f1f7ababb vkd3d-shader/ir: Pass a struct vsir_program to remap_output_signature(). 2024-03-13 22:00:42 +01:00
Henri Verbeet
0edf6d25f3 vkd3d-shader/ir: Pass a struct vsir_program to simple_structurizer_run(). 2024-03-13 22:00:41 +01:00
Henri Verbeet
c3f3cb5ef9 vkd3d-shader/ir: Pass a struct vsir_program to materialize_ssas_to_temps(). 2024-03-13 22:00:40 +01:00
Henri Verbeet
76791913d0 vkd3d-shader/ir: Pass a struct vsir_program to materialize_ssas_to_temps_process_reg(). 2024-03-13 22:00:39 +01:00
Henri Verbeet
343a365c97 vkd3d-shader/ir: Pass a struct vsir_program to instruction_array_lower_texkills(). 2024-03-13 22:00:37 +01:00
Giovanni Mascellani
f2b2040ff6 vkd3d-shader/ir: Sort loop intervals. 2024-03-12 22:14:47 +01:00
Giovanni Mascellani
070c4af8b3 vkd3d-shader/ir: Generate synthetic intervals for forward edges. 2024-03-12 22:14:46 +01:00
Giovanni Mascellani
1d60612340 vkd3d-shader/ir: Compute loop as intervals of the block order. 2024-03-12 22:14:45 +01:00
Giovanni Mascellani
204c8afb9c vkd3d-shader/dxbc: Remove flag is_dxil. 
The full shader profile is already available in vsir_program.
 2024-03-11 22:09:31 +01:00
Giovanni Mascellani
470d83a9da vkd3d-shader: Move shader signatures to vsir_program. 2024-03-11 22:09:31 +01:00
Giovanni Mascellani
b940d79aa8 vkd3d-shader/ir: Keep loops contiguous in the topological sort. 2024-03-08 23:35:48 +01:00
Giovanni Mascellani
cf9a023566 vkd3d-shader/ir: Dump the topological order of the control flow graph. 2024-03-08 23:35:47 +01:00
Giovanni Mascellani
ed40646c8a vkd3d-shader/ir: Topologically sort the control flow graph. 2024-03-08 23:35:46 +01:00
Giovanni Mascellani
880d781b57 vkd3d-shader/ir: Allow adding to a block list without checking for duplicates. 2024-03-08 23:35:45 +01:00
Giovanni Mascellani
8723b5d266 vkd3d-shader/ir: Sort each loop by block label. 2024-03-07 23:08:36 +01:00
Giovanni Mascellani
3d4092d9dc vkd3d-shader/ir: Dump the loops in the control flow graph. 2024-03-07 23:08:35 +01:00
Giovanni Mascellani
8241ca2b67 vkd3d-shader/ir: Keep track of loops by header block. 2024-03-07 23:08:34 +01:00
Giovanni Mascellani
088a6c49a2 vkd3d-shader/ir: Keep a reference to the message context inside struct vsir_cfg. 2024-03-07 23:08:33 +01:00
Giovanni Mascellani
9ac842b36b vkd3d-shader/ir: Compute the loops in the control flow graph. 2024-03-07 23:08:32 +01:00
Giovanni Mascellani
de15f55477 vkd3d-shader/ir: Introduce a helper to express block domination. 2024-03-07 23:08:31 +01:00
Giovanni Mascellani
c3657c4799 vkd3d-shader/ir: Add a debug buffer to struct vsir_cfg. 2024-03-07 23:08:30 +01:00
Giovanni Mascellani
c5893288d9 vkd3d-shader/ir: Properly handle function-local indexable temps when flattening control flow. 
They have to be considered code rather than declarations, as required
for instance by the SPIR-V backend.
 2024-03-07 23:08:28 +01:00
Giovanni Mascellani
9c678532a7 vkd3d-shader/ir: Dump the domination relationship. 2024-02-22 22:45:16 +01:00
Giovanni Mascellani
04c2852c1a vkd3d-shader/ir: Compute the domination relationship. 2024-02-22 22:45:15 +01:00
Giovanni Mascellani
2573d86ccf vkd3d-shader/ir: Dump the control flow graph in the GraphViz format. 2024-02-22 22:45:14 +01:00
Giovanni Mascellani
da037b61ba vkd3d-shader/ir: Build a representation of the control flow graph. 2024-02-22 22:45:13 +01:00
Giovanni Mascellani
51f13391e6 vkd3d-shader/ir: Introduce a simple control flow graph structurizer. 
The structurizer is implemented along the lines of what is usually called
the "structured program theorem": the control flow is completely
virtualized by mean of an additional TEMP register which stores the
block index which is currently running. The whole program is then
converted to a huge switch construction enclosed in a loop, executing
at each iteration the appropriate block and updating the register
depending on block jump instruction.

The algorithm's generality is also its major weakness: it accepts any
input program, even if its CFG is not reducible, but the output
program lacks any useful convergence information. It satisfies the
letter of the SPIR-V requirements, but it is expected that it will
be very inefficient to run on a GPU (unless a downstream compiler is
able to devirtualize the control flow and do a proper convergence
analysis pass). The algorithm is however very simple, and good enough
to at least pass tests, enabling further development. A better
alternative is expected to be upstreamed incrementally.

Side note: the structured program theorem is often called the
Böhm-Jacopini theorem; Böhm and Jacopini did indeed prove a variation
of it, but their algorithm is different from what is commontly attributed
to them and implemented here, so I opted for not using their name.
 2024-02-06 23:07:07 +01:00
Giovanni Mascellani
19aef21369 vkd3d-shader/ir: Handle PHI nodes when materializing SSA registers. 
PHI nodes cannot be used with TEMP registers, so they have to be
converted to MOV/MOVC nodes and moved before the BRANCH node.
 2024-02-06 23:07:03 +01:00
Giovanni Mascellani
e0d3e9c376 vkd3d-shader/ir: Materialize SSA registers to temporaries. 
For simplicity PHI nodes are not currently handled.

The goal for this pass is to make the CFG structurizer simpler, because
it doesn't have to care about the more rigid rules SSA registers have
to satisfy than TEMP registers.

It is likely that the generated code will be harder for downstream
compilers to optimize and execute efficiently, so once a complete
structurizer is in place this pass should be removed, or at least
greatly reduced in scope.
 2024-02-06 23:07:00 +01:00
Henri Verbeet
d38221bd68 vkd3d-shader/ir: Pass a struct vsir_program to shader_parser_get_src_params(). 2024-02-01 00:08:23 +01:00
Henri Verbeet
47ec24ebad vkd3d-shader/ir: Pass a struct vsir_program to shader_parser_get_dst_params(). 2024-02-01 00:08:22 +01:00
Giovanni Mascellani
edc406d297 vkd3d-shader/ir: Check that SSA registers are used with compatible data types. 
Specifically, accesses are always 32 bit or always 64 bit.
 2024-01-29 22:33:34 +01:00
Giovanni Mascellani
026c502f31 vkd3d-shader/ir: Fixup PHI nodes when lowering switches to selection ladders. 
A map between the blocks before and after the pass is built and then
used to fix the PHI nodes.
 2024-01-29 22:33:17 +01:00
Giovanni Mascellani
378109051c vkd3d-shader/ir: Lower monolithic switches to selection ladders. 
PHI nodes must be fixed up after this pass, because the block references
might have become broken. For simplicitly this is not handled yet.

The goal for this pass is to make the CFG structurizer simpler, because
only conditional and unconditional branches must be supported.
Eventually this limitation might be lifted if there is advantage in
doing so.
 2024-01-29 22:33:15 +01:00
Francisco Casas
cec45da45b vkd3d-shader/ir: Update flatten_control_flow_constructs() comment. 2024-01-25 22:24:27 +01:00
Henri Verbeet
eabcaf15fb vkd3d-shader/ir: Use vsir_instruction_is_dcl() in vsir_validate_instruction(). 2024-01-24 22:38:36 +01:00
Henri Verbeet
365ad56888 vkd3d-shader/ir: Get rid of shader_instruction_is_dcl(). 2024-01-24 22:38:34 +01:00
Francisco Casas
b92f6c448a vkd3d-shader/ir: Lower texkill instructions to discard_nz. 2024-01-24 22:37:41 +01:00
Henri Verbeet
bf628f0c74 vkd3d-shader/ir: Store block names in struct vsir_program. 2024-01-23 20:27:35 +01:00
Henri Verbeet
f3c7d2d05c vkd3d-shader/ir: Store the block count in struct vsir_program. 2024-01-23 20:27:34 +01:00
Giovanni Mascellani
de9725b6ba vkd3d-shader/ir: Remove DCL_TEMPS instructions. 
We have to do work to keep it updated across passes and we never read it.
 2024-01-23 20:26:38 +01:00
Giovanni Mascellani
4b869f73bb vkd3d-shader/ir: Run tracing and validation for DXIL code too. 2024-01-23 20:26:36 +01:00
Conor McCarthy
6df725718a vkd3d-shader/ir: Refactor return code checking in vkd3d_shader_normalise(). 
We started with only one or two of these but it has become excessive.

Patch originally written by Conor McCarthy and updated by Giovanni Mascellani.
 2024-01-23 20:26:34 +01:00
Giovanni Mascellani
232b2ad360 vkd3d-shader/ir: Validate PHI instructions. 2024-01-23 20:26:08 +01:00
Giovanni Mascellani
56f9057985 vkd3d-shader/ir: Do not allow IMMCONST and IMMCONST64 as destination registers. 2024-01-23 20:26:06 +01:00
Giovanni Mascellani
21633fcc52 vkd3d-shader/ir: Refactor register-type-specific code in parameter validation. 
To better accommodate code for other register types.
 2024-01-23 20:26:05 +01:00
Giovanni Mascellani
fb6409bda1 vkd3d-shader/ir: Check that all instructions appear in a block. 2024-01-23 20:26:03 +01:00
Henri Verbeet
adc02eada8 vkd3d-shader/ir: Store the temporary register count in struct vsir_program. 2024-01-22 22:18:53 +01:00
Henri Verbeet
94ca46916a vkd3d-shader/ir: Store the SSA register count in struct vsir_program. 2024-01-22 22:18:52 +01:00