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Allow readonly functions to unwind exceptions. Teach

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the optimizers about this.  For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71071 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2009-05-06 06:49:50 +00:00
parent e031e4bcb9
commit 7af1c78b98
13 changed files with 53 additions and 39 deletions
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2
lib/Transforms/Scalar/ADCE.cpp
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@@ -57,7 +57,7 @@ bool ADCE::runOnFunction(Function& F) {
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
if (isa<TerminatorInst>(I.getInstructionIterator()) ||
isa<DbgInfoIntrinsic>(I.getInstructionIterator()) ||
I->mayWriteToMemory()) {
I->mayHaveSideEffects()) {
alive.insert(I.getInstructionIterator());
worklist.push_back(I.getInstructionIterator());
}