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Count class-value constructions in the census, and key caches on both diagnostics

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- The heap census also counts instances a class value constructs: the
  construct thunk that `newValue` calls counts them after its allocation,
  as `new` does at its own.
- A build with SCRIPTC_HEAP_CENSUS set is its own executable cache entry
  (`heapCensus` in the early cache's key and route key), and one with
  SCRIPTC_REPR_REPORT set does not read the early cache, since a hit
  emits no module and so writes no report. The CLI's startup route defers
  both to the full compiler.
- Test: a warm cache still builds the census executable, counting
  `new` and class-value constructions, and still writes the report.
This commit is contained in:
Chris Tate
2026-10-27 01:54:48 -05:00
parent 8b256639f4
commit 60d5dc8ab1
9 changed files with 100 additions and 9 deletions
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packages/compiler/src/executable/executable-cache.ts
+4
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@@ -168,6 +168,8 @@ export interface EarlyExecutableCacheOptions {
checker?: string;
/** Omitted unless SCRIPTC_YOUNG_NURSERY=1 (backend/young-nursery.ts). */
youngNursery?: true;
/** Omitted unless SCRIPTC_HEAP_CENSUS is set (backend/llvm/heap-census.ts). */
heapCensus?: true;
npmStatic: readonly string[] | "auto" | null;
/** Omitted unless shape inference's overlay compiles the packages
* (frontend/shape-inference). */
@@ -324,6 +326,7 @@ function cacheKey(options: EarlyExecutableCacheOptions): string {
...(options.functionLayout !== undefined ? [`layout:${options.functionLayout}`] : []),
...(options.checker !== undefined ? [`checker:${options.checker}`] : []),
...(options.youngNursery ? ["young-nursery"] : []),
...(options.heapCensus ? ["heap-census"] : []),
options.npmStatic === null
? "<npm-static-off>"
: options.npmStatic === "auto"
@@ -370,6 +373,7 @@ function routeKey(options: Omit<EarlyExecutableRouteOptions, "nativeEnvironment"
if (options.functionLayout !== undefined) hash.update(`layout:${options.functionLayout}\0`);
if (options.checker !== undefined) hash.update(`checker:${options.checker}\0`);
if (options.youngNursery) hash.update("young-nursery\0");
if (options.heapCensus) hash.update("heap-census\0");
hash
.update(
options.npmStatic === null