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Update optimization passes to handle inalloca arguments

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Summary:
I searched Transforms/ and Analysis/ for 'ByVal' and updated those call
sites to check for inalloca if appropriate.

I added tests for any change that would allow an optimization to fire on
inalloca.

Reviewers: nlewycky

Differential Revision: http://llvm-reviews.chandlerc.com/D2449

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200281 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2014-01-28 02:38:36 +00:00
parent 1386d3f885
commit 59bec0e3c0
14 changed files with 124 additions and 20 deletions
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10
lib/Transforms/Scalar/DeadStoreElimination.cpp
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@@ -374,8 +374,8 @@ static OverwriteResult isOverwrite(const AliasAnalysis::Location &Later,
return OverwriteUnknown;
// Check to see if the later store is to the entire object (either a global,
// an alloca, or a byval argument). If so, then it clearly overwrites any
// other store to the same object.
// an alloca, or a byval/inalloca argument). If so, then it clearly
// overwrites any other store to the same object.
const DataLayout *TD = AA.getDataLayout();
const Value *UO1 = GetUnderlyingObject(P1, TD),
@@ -742,11 +742,11 @@ bool DSE::handleEndBlock(BasicBlock &BB) {
DeadStackObjects.insert(I);
}
// Treat byval arguments the same, stores to them are dead at the end of the
// function.
// Treat byval or inalloca arguments the same, stores to them are dead at the
// end of the function.
for (Function::arg_iterator AI = BB.getParent()->arg_begin(),
AE = BB.getParent()->arg_end(); AI != AE; ++AI)
if (AI->hasByValAttr())
if (AI->hasByValOrInAllocaAttr())
DeadStackObjects.insert(AI);
// Scan the basic block backwards