Fix IA-64 memchr read-ahead.
The latest stratcliff extension exposed a bug in the IA-64 memchr which uses non-speculative loads to prefetch data. Change the code to use speculative loads with appropriate fixup. Fixes BZ 10162.
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The latest stratcliff extension exposed a bug in the IA-64 memchr which uses non-speculative loads to prefetch data. Change the code to use speculative loads with appropriate fixup. Fixes BZ 10162.