Closed Bug 551761 Opened 16 years ago Closed 15 years ago

remove bytecode pc from stack frame, compute from hw pc

Categories

(Core :: JavaScript Engine, defect)

Product:
Core
Component:
JavaScript Engine
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 587707

People

(Reporter: luke, Unassigned)

References

Details

Currently, on every JITed JSOP_CALL, we store both the hw return address and the bytecode return address. Also, on every stub call, we write the current bytecode pc to cx->regs->pc. Assuming we can remove all hot uses of the bytecode pc and recompute cold uses from the hw pc (using a table we already generate), we could avoid all these logically redundant stores, save a word in JSStackFrame, and shrink our stub call path a bit.
Status: NEW → RESOLVED
Closed: 15 years ago
Resolution: --- → DUPLICATE
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