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add another crazy idea :) 

llvm-svn: 64092
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Chris Lattner 2009-02-08 20:41:34 +00:00
parent c9e1b48449
commit cd2b504d5f
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@ -82,12 +82,20 @@ of <a href="http://llvm.org/docs/SourceLevelDebugging.html">LLVM debug info</a>
(which the code generator turns into DWARF). The missing pieces are pretty
minor at this point.</li>
<li><b>Overflow detection</b>: an interesting project would be to add a
<li><b>Overflow detection</b>: an interesting project would be to add a -ftrapv
compilation mode that causes -emit-llvm to generate overflow tests for all
signed integer arithmetic operators, and call abort if they overflow. Overflow
is undefined in C and hard for people to reason about. LLVM IR also has
intrinsics for generating arithmetic with overflow checks directly.</li>
<li><b>Undefined behavior checking</b>: similar to adding -ftrapv, codegen could
insert runtime checks for all sorts of different undefined behaviors, from
reading uninitialized variables, buffer overflows, and many other things. This
checking would be expensive, but the optimizers could eliminate many of the
checks in some cases, and it would be very interesting to test code in this mode
for certain crowds of people. Because the inserted code is coming from clang,
the "abort" message could be very detailed about exactly what went wrong.</li>
<li><b>Continue work on C++ support</b>: Implementing all of C++ is a very big
job, but there are lots of little pieces that can be picked off and implemented.
See the <a href="cxx_status.html">C++ status report page</a> to find out what is