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path: root/llvm/lib/CodeGen/JumpInstrTables.cpp
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* [cleanup] Re-sort all the #include lines in LLVM usingChandler Carruth2015-01-141-2/+0
| | | | | | | | | | | utils/sort_includes.py. I clearly haven't done this in a while, so more changed than usual. This even uncovered a missing include from the InstrProf library that I've added. No functionality changed here, just mechanical cleanup of the include order. llvm-svn: 225974
* Replace several 'assert(false' with 'llvm_unreachable' or fold a condition ↵Craig Topper2015-01-051-2/+2
| | | | | | into the assert. llvm-svn: 225160
* Add Forward Control-Flow Integrity.Tom Roeder2014-11-111-6/+7
| | | | | | | | | | | | | | | | | | | | This commit adds a new pass that can inject checks before indirect calls to make sure that these calls target known locations. It supports three types of checks and, at compile time, it can take the name of a custom function to call when an indirect call check fails. The default failure function ignores the error and continues. This pass incidentally moves the function JumpInstrTables::transformType from private to public and makes it static (with a new argument that specifies the table type to use); this is so that the CFI code can transform function types at call sites to determine which jump-instruction table to use for the check at that site. Also, this removes support for jumptables in ARM, pending further performance analysis and discussion. Review: http://reviews.llvm.org/D4167 llvm-svn: 221708
* Don't manually (and forcibly) run the verifier on the entire module fromChandler Carruth2014-07-301-4/+0
| | | | | | | | | | | | | 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
* [C++11] Use 'nullptr'.Craig Topper2014-06-081-1/+1
| | | | llvm-svn: 210442
* Add a new attribute called 'jumptable' that creates jump-instruction tables ↵Tom Roeder2014-06-051-0/+301
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
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