Mesa NIR backend (NAK/LLVMpipe) (#12089)

* nak works

* TestOps::test_add works

* testop has no crashes

* fix bool casts

* fix typo

* add disassemble

* RANGE and locals/regs

* simplify NAKCompiler

* disass cleanup

* cleanup nir codegen

* almost all tests passing

* cleanup notes in extra/

* old notes

* only import nak if NIR=1

* fix new SPECIAL syntax

* fix local/shared memory

* more tests passing

* add DEFINE_VAR support

* llvmpipe kinda works

* diskcache

* some mypy stuff

* lvp passing test_ops.py

* fix imports

* actually fix imports

* remove 'stdout'

* fix llvm import

* fix mypy issues

* nicer errors

* simpler test_dtype skips

* test lvp in CI

* fix github action syntax

* fix more actions typos

* switch to mesa 25.1.0

* diskcache_put

* better generation for lvp nir_options

* b64encode shader blobs

* Revert diskcache changes

This reverts commits 930fa3de8a and 8428c694b3.

* general cleanup

* better error messages

* fix llvm import

* fix windows tests

* link with libm and libgcc_s

* fix some errors

* dont check for 'float4'

* NIR uses pointer arithmetic

* use tinymesa

* bump tinymesa

* bump tinymesa again

* update lvp nir_options

* print nir shader with DEBUG

* simplify LVPCompiler

* more tests

* "gated" STORE

* NAK is cacheable

* more tests

* all tests pass locally for NAK

* test autogen in CI

* autogen deps

* more deps

* fix uop_gc

* fix macos

* mypy

* save 2 lines

* save two more lines

* save 1 line

* save 4 lines

* save more lines

* Revert "save more lines"

This reverts commit dd3a720c5a.

* save more lines

* fix LVP on windows

* refactor

* reorganize some code

* refactor lib_gpu

* move LVP check

* out of order loads

* remove support.mesa

* bump tinymesa version

* simplify LVP jit

* macos

* macos ci

* shell: bash

* testing

* more testing

* compute brew prefix

* stupid typo

* actually fix

* lib

* stdout on macos

* inline gallivm_compile_module

* Revert "inline gallivm_compile_module"

This reverts commit b65983b151.

* elf macos

* semicolon

* inherit from CPULLVMCompiler

* ruff

* disas test

* fix libm linking

* default is fine actually

* arm works

* add elf loader link test

* fix NAK beam

* pylint is too smart by half

---------

Co-authored-by: George Hotz <72895+geohot@users.noreply.github.com>
Co-authored-by: nimlgen <138685161+nimlgen@users.noreply.github.com>

.github/workflows/autogen.yml

@@ -36,8 +36,9 @@ jobs:
         cuda: 'true'
         webgpu: 'true'
         llvm: 'true'
+        pydeps: 'pyyaml mako'
     - name: Install autogen support packages
-      run: sudo apt-get install -y --no-install-recommends llvm-14-dev libclang-14-dev
+      run: sudo apt-get install -y --no-install-recommends llvm-14-dev libclang-14-dev llvm-20-dev
     - name: Verify OpenCL autogen
       run: |
         cp tinygrad/runtime/autogen/opencl.py /tmp/opencl.py.bak
@@ -89,3 +90,8 @@ jobs:
         cp tinygrad/runtime/autogen/llvm.py /tmp/llvm.py.bak
         ./autogen_stubs.sh llvm
         diff /tmp/llvm.py.bak tinygrad/runtime/autogen/llvm.py
+    - name: Verify mesa autogen
+      run: |
+        cp tinygrad/runtime/autogen/mesa.py /tmp/mesa.py.bak
+        ./autogen_stubs.sh mesa
+        diff /tmp/mesa.py.bak tinygrad/runtime/autogen/mesa.py