Status: Accepted
Owner: [email protected]
Labels: Type-Bug Priority-Medium HW-ARM
New issue 1058 by [email protected]: ARM: Rewrite LGapResolver
http://code.google.com/p/v8/issues/detail?id=1058
In SVN revision 6344 the gap resolver for IA32 was changed.
The ARM gap resolver is using the old-style implementation. It appears to
suffer from issue 1033 (using register d0 for both resolving cycles and for
memory-to-memory moves). It also appears to sometimes end by reading the
context out of the stack and writing it to the scratch register r9.
At a minimum, these issues need to be fixed. The whole class could be
restructured to follow a similar depth-first strategy to the IA32. The
strategy is slightly different because it is probably better to use a
scratch register to break cycles rather than trying to resolve them via
exchanges.
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