js/src/jit-test/tests/gc/pretenure-object-long-then-short-lived.js


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// Allocate many objects, changing the lifetime from long-lived to short lived
// and check that we recover.

load(libdir + "pretenure.js");

setupPretenureTest();

// Phase 1: long lived.

allocateObjects(nurseryCount, true);
let { minor, major } = runTestAndCountCollections(
  () => allocateObjects(tenuredCount, true)
);

print(`${minor} minor GCs, ${major} major GCs`);
assertEq(minor <= 1, true);
assertEq(major >= 5, true);

// Phase 2: short lived.

allocateObjects(tenuredCount, false);
({ minor, major } = runTestAndCountCollections(
  () => allocateObjects(nurseryCount * 5, false)
));

print(`${minor} minor GCs, ${major} major GCs`);
assertEq(minor >= 5, true);
assertEq(major == 0, true);