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add a note about a way to improve this code further, that I won't be getting

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to right now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23485 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-27 22:44:59 +00:00
parent 9a5582f251
commit 5b3c70263b
1 changed files with 8 additions and 0 deletions
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8
lib/Transforms/Utils/LowerInvoke.cpp
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@ -412,6 +412,14 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
NumInvokes += Invokes.size();
NumUnwinds += Unwinds.size();
// TODO: This is not an optimal way to do this. In particular, this always
// inserts setjmp calls into the entries of functions with invoke instructions
// even though there are possibly paths through the function that do not
// execute any invokes. In particular, for functions with early exits, e.g.
// the 'addMove' method in hexxagon, it would be nice to not have to do the
// setjmp stuff on the early exit path. This requires a bit of dataflow, but
// would not be too hard to do.
// If we have an invoke instruction, insert a setjmp that dominates all
// invokes. After the setjmp, use a cond branch that goes to the original