Commit Graph

2 Commits

Author SHA1 Message Date
Chandler Carruth 681069d675 Don't manually (and forcibly) run the verifier on the entire module from
the jump instruction table pass. First, the verifier is already built
into all the tools. The test case is adapted to just run llvm-as
demonstrating that we still catch the broken module. Second, the
verifier is *extremely* slow. This was responsible for very significant
compile time regressions.

If you have deployed a Clang binary anywhere from r210280 to this
commit, you really want to re-deploy.

llvm-svn: 214287
2014-07-30 05:44:04 +00:00
Tom Roeder 44cb65fff1 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.

llvm-svn: 210280
2014-06-05 19:29:43 +00:00