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Factor out the code for testing whether a function accesses

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arbitrary memory into a helper function, and adjust some comments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118687 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-11-10 17:34:04 +00:00
parent 50bcaece67
commit 432d08cbdb
2 changed files with 12 additions and 6 deletions
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5
lib/Transforms/IPO/FunctionAttrs.cpp
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@@ -131,9 +131,8 @@ bool FunctionAttrs::AddReadAttrs(const CallGraphSCC &SCC) {
AliasAnalysis::ModRefBehavior MRB = AA->getModRefBehavior(CS);
// If the call doesn't access arbitrary memory, we may be able to
// figure out something.
if (!(MRB & AliasAnalysis::Anywhere &
~AliasAnalysis::ArgumentPointees)) {
// If the call accesses argument pointees, check each argument.
if (AliasAnalysis::onlyAccessesArgPointees(MRB)) {
// If the call does access argument pointees, check each argument.
if (MRB & AliasAnalysis::AccessesArguments)
// Check whether all pointer arguments point to local memory, and
// ignore calls that only access local memory.