Tracking: merge queue for cpunion's open PRs

[cpunion]

Merge queue

截至 2026-08-04，共有 39 个由 cpunion 提交到 xgo-dev/llgo 的 open PR（含 Draft）。

按功能分组；组内缩进表示依赖关系。先合并父 PR，再检查子 PR 的 effective diff，并只在父 PR 稳定后 rebase 子 PR。这里仅保留当前 open PR；已合并或关闭的 PR 及其失效依赖不再列入队列。

Panic、recover 与 runtime 错误语义

• ssa,runtime: tighten recover to direct deferred calls #2033 ssa,runtime: tighten recover to direct deferred calls
  • ssa,runtime: return runtime.Error values for assertions and faults #2034 ssa,runtime: return runtime.Error values for assertions and faults（依赖 ssa,runtime: tighten recover to direct deferred calls #2033）
• runtime: preserve type metadata in assertion panics #2252 runtime: preserve type metadata in assertion panics
• cl: preserve required nil dereference checks #2256 cl: preserve required nil dereference checks

Profiling、GC 与 finalizer

• runtime,cl: add Go-compatible sampled memory profiling #2027 runtime,cl: add Go-compatible sampled memory profiling
• cl,ssa,runtime: safely clear dead local finalizer roots #2036 cl,ssa,runtime: safely clear dead local finalizer roots

编译、接口与初始化语义

• ssa: saturate float-to-uint32 conversions #2253 ssa: saturate float-to-uint32 conversions
• build: schedule package initialization in Go order #2254 build: schedule package initialization in Go order
• ssa: preserve package identity for unexported methods #2258 ssa: preserve package identity for unexported methods

Go 1.26 GOROOT 诊断与编译语义

• internal/packages: normalize Go compiler syntax diagnostics #2219 internal/packages: normalize Go compiler syntax diagnostics（Draft）
  • test/goroot: match more parser recovery diagnostics #2222 test/goroot: match more parser recovery diagnostics（依赖 internal/packages: normalize Go compiler syntax diagnostics #2219）
    • test/goroot: match EOF parser recovery diagnostics #2223 test/goroot: match EOF parser recovery diagnostics（依赖 test/goroot: match more parser recovery diagnostics #2222）
    • test/goroot: match malformed package clause diagnostics #2224 test/goroot: match malformed package clause diagnostics（依赖 test/goroot: match more parser recovery diagnostics #2222）
    • cl: tolerate invalid receivers during syntax preload #2226 cl: tolerate invalid receivers during syntax preload（依赖 test/goroot: match more parser recovery diagnostics #2222）
    • test/goroot: match malformed selector recovery #2227 test/goroot: match malformed selector recovery（依赖 test/goroot: match more parser recovery diagnostics #2222）
    • test/goroot: match vareq recovery diagnostics #2230 test/goroot: match vareq recovery diagnostics（依赖 test/goroot: match more parser recovery diagnostics #2222）
• cmd/compile: validate noescape function bodies #2220 cmd/compile: validate noescape function bodies
• cl: preserve generic local type identity in nested closures #2229 cl: preserve generic local type identity in nested closures
• cl: preserve zero values for blank struct fields #2231 cl: preserve zero values for blank struct fields

Test 编排、GOROOT 基线与 CI

• test: share package builds before parallel test runs #2234 test: share package builds before parallel test runs
• test/goroot: synchronize native run expectations #2264 test/goroot: synchronize native run expectations
• docs: add contributor guide and validation wrappers #2279 docs: add shared contributor validation guide

DWARF、debugger 与 Darwin debug artifacts

先 review 根 PR #2143；其余依赖 PR 保持 Draft，待父 PR 稳定后逐个 rebase。

• debug: keep optimization and SSA rewrites DWARF-safe #2143 debug: keep optimization and SSA rewrites DWARF-safe
  • cabi: preserve debug variable homes #2148 cabi: preserve debug variable homes（Draft；依赖 debug: keep optimization and SSA rewrites DWARF-safe #2143）
  • fix(pclntab): preserve Darwin line sites with DWARF #2157 fix(pclntab): preserve Darwin line sites with DWARF（Draft；依赖 debug: keep optimization and SSA rewrites DWARF-safe #2143）
    • [Based on #2157] build: match cmd/link DWARF defaults #2142 build: match cmd/link DWARF defaults（Draft；依赖 debug: keep optimization and SSA rewrites DWARF-safe #2143、fix(pclntab): preserve Darwin line sites with DWARF #2157）
• build: stabilize Darwin DWARF debug maps across cache hits #2202 build: stabilize Darwin DWARF debug maps across cache hits（Draft）
• debug: preserve O0 variable locations #2235 debug: preserve O0 variable locations（Draft）
• debug: allow supported targets to retain DWARF #2269 debug: allow supported targets to retain DWARF（Draft）

wasm scheduler、runtime 与 GC

先推进根 PR #2192，再 rebase #2197。其余上游 Draft 保持冻结，待父依赖稳定后再更新；fork staging 不计入本 issue 的 38 个 xgo-dev open PR。

• runtime/wasm: add single-worker Asyncify scheduler #2192 runtime/wasm: add single-worker Asyncify scheduler
  • runtime/wasm: add WASI single-worker scheduler (based on #2192) #2197 runtime/wasm: add WASI single-worker scheduler（依赖 runtime/wasm: add single-worker Asyncify scheduler #2192）
    • runtime/wasm: support blocking primitives (based on #2197) #2198 runtime/wasm: support blocking primitives（Draft；依赖 runtime/wasm: add WASI single-worker scheduler (based on #2192) #2197）
      • runtime/wasm: add timers and host event wakeups (based on #2198) #2204 runtime/wasm: add timers and host event wakeups（Draft；依赖 runtime/wasm: support blocking primitives (based on #2197) #2198）
    • runtime/wasm: add opt-in non-moving collector (based on #2197) #2203 runtime/wasm: add opt-in non-moving collector（Draft；依赖 runtime/wasm: add WASI single-worker scheduler (based on #2192) #2197）
      • runtime/wasm: preserve suspended goroutine GC roots (based on #2198, #2203) #2207 runtime/wasm: preserve suspended goroutine GC roots（Draft；依赖 runtime/wasm: support blocking primitives (based on #2197) #2198、runtime/wasm: add opt-in non-moving collector (based on #2197) #2203）
    • [Based on #2197] runtime/wasm: add experimental Go-style resumable ABI #2236 runtime/wasm: add experimental Go-style resumable ABI（Draft；依赖 runtime/wasm: add WASI single-worker scheduler (based on #2192) #2197）
• runtime/wasm: enable cooperative safepoints and GC by default (based on #2204, #2207) #2214 runtime/wasm: enable cooperative safepoints and GC by default（Draft；依赖 runtime/wasm: add timers and host event wakeups (based on #2198) #2204、runtime/wasm: preserve suspended goroutine GC roots (based on #2198, #2203) #2207）
  • runtime/wasm: add bounded Web worker scheduling (based on #2214) #2216 runtime/wasm: add bounded Web worker scheduling（Draft；依赖 runtime/wasm: enable cooperative safepoints and GC by default (based on #2204, #2207) #2214）
    • runtime/wasm: stop all workers for garbage collection (based on #2216) #2217 runtime/wasm: stop all workers for garbage collection（Draft；依赖 runtime/wasm: add bounded Web worker scheduling (based on #2214) #2216）