Add a new attribute called 'jumptable' that creates jump-instruction tables for…

Description

Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.
It includes a pass that rewrites all indirect calls to jumptable functions to pass through these tables.

This also adds backend support for generating the jump-instruction tables on ARM and X86.
Note that since the jumptable attribute creates a second function pointer for a
function, any function marked with jumptable must also be marked with unnamed_addr.

Details

Committed
tmroederJun 5 2014, 12:29 PM
Parents
rL210279: [PPC64LE] Implement little-endian semantics for vec_perm
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