drift
⚠ VERY EXPERIMENTAL — early prototype, numbers may be wrong or change
drift is a regression-tracking harness: it walks a compiler's
git history, builds each commit, and records compiler metrics per commit so
regressions surface as the code evolves. It memoizes builds and measurements,
so re-running only does new work. This instance tracks register usage, code
size, instruction count and segment sizes for a no-LLVM AMDGCN backend of the
Zig compiler, measured against a fixed suite of GPU kernels. Each metric is a
pluggable tracker. Click a commit for its build report and to download the
compiler; dimmed rows are non-backend commits, kept for continuity.
text_bytes (max 80)
● empty.zig● splat.zig● store_const.zig
instructions (max 13)
● empty.zig● splat.zig● store_const.zig
sgpr (max 8, lower is better)
● empty.zig● splat.zig● store_const.zig
vgpr (max 3, lower is better)
● empty.zig● splat.zig● store_const.zig
kernarg_bytes (max 24)
● empty.zig● splat.zig● store_const.zig
lds_bytes (max 1)
● empty.zig● splat.zig● store_const.zig
scratch_bytes (max 1)
● empty.zig● splat.zig● store_const.zig
| date | branch | commit | subject | build | measures |
|---|
| 2026-07-05 | amdgcn-backend | 77c455c2b7 ↗ | amdgcn: lower loads and stores through any number of pointer arguments | compiler | 3 ok |
| 2026-07-04 | amdgcn-backend | 8f1b45144a ↗ | amdgcn: lower a kernel that stores through a pointer argument | compiler | 1 failed |
| 2026-07-04 | amdgcn-backend | 8dd73110ac ↗ | amdgcn: derive target string, wavefront size and e_flags from the target | compiler | 3 ok |
| 2026-07-04 | amdgcn-backend | 52e0a7ed7b ↗ | amdgcn: derive s_endpgm and descriptor from named fields | compiler | 3 ok |
| 2026-07-04 | amdgcn-backend | 776cf8d97b ↗ | amdgcn: native backend emits an empty kernel | compiler | 3 ok |
| 2026-07-03 | amdgcn-backend | 306b4700eb ↗ | lab: hand-built empty amdgcn kernel + HSA dispatch | same-as-parent | - |
| 2026-07-03 | amdgcn-backend | 2f7e082381 ↗ | libc: Add missing macOS mach-o headers | same-as-parent | - |
| 2026-07-03 | amdgcn-backend | fd62635d78 ↗ | ci: bump aarch64-linux-release timeout by 1 hour | same-as-parent | - |