Backport gfx1154 support into ZLUDA's Windows LLVM compiler

Adapt official LLVM 7a0829e41228 to the pinned LLVM 22 parser and ELF structures. Apply and audit the complete source delta before building, export its provenance, and package the source patch. Add 33 offline public PTX compilation checks across all eleven GPU targets without hardware execution. Preserve strict arithmetic and document RX9070XT K/M regressions.

docs/windows-gpu-support.md

@@ -99,6 +99,29 @@ Use `-GpuArchitectures gfx1100,gfx1101,gfx1102,gfx1200,gfx1201` for a subset.
 Per-target logs and `matrix-build.json` distinguish compilation from execution.
 The supplied DLL generates manifests locally and is never copied into archives.
 
+Rebuild LLVM/ZLUDA when updating from an older package: the old LLVM 22 backend
+does not recognize gfx1154 even though Clang 24 compiles native objects for it.
+`build-zluda-llvm.ps1` now applies the source backport in `patches/zluda-llvm`
+automatically; relink with `build-zluda-windows.ps1` afterward. Compiler base
+and patch hashes are recorded in the ZLUDA build metadata and included in game
+packages. The expected patched LLVM submodule appears modified in its parent
+checkout; its complete source delta is exported, not a binary target override.
+
+For a compilation gate requiring neither a GPU nor NVIDIA DLLs, run:
+
+```powershell
+.\scripts\windows\test-zluda-target-compilation.ps1 -ZludaRoot "$PWD\dist\zluda-windows-final"
+```
+
+All 33 public PTX compilations pass for the eleven targets: Driver API pattern,
+FP16 MMA strict reference and explicit WMMA modes, with correct ELF targets
+and wave32. The gfx12 strict F16 reference intentionally retains its existing
+double-precision helper; the separate WMMA mode checks code generation only.
+It does not enable relaxed arithmetic in game packages or validate numerical
+results on other GPUs. The original gfx1154 compiler abort is preserved locally
+in `build/llvm-gfx1154/before.log`; the regression results are in
+`test-results/windows-gpu-coverage/zluda-offline`.
+
 ## Fork adaptation
 
 Reviewed [realdody's branch](https://github.com/realdody/d4r/tree/windows-rdna3)