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| author | Dan Gohman <gohman@apple.com> | 2009-11-19 21:57:48 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-11-19 21:57:48 +0000 |
| commit | f94b5edc452c32d9ae258e7de30c33391fda6cc9 (patch) | |
| tree | 3e3d625dfac1b337e2c16274d369855e252bef6b /lib/Transforms/IPO/FunctionAttrs.cpp | |
| parent | 07ba906413ed0e8e196a6795665f349ba8fdca4c (diff) | |
| download | llvm-f94b5edc452c32d9ae258e7de30c33391fda6cc9.tar.gz llvm-f94b5edc452c32d9ae258e7de30c33391fda6cc9.tar.bz2 llvm-f94b5edc452c32d9ae258e7de30c33391fda6cc9.tar.xz | |
Extend CaptureTracking to indicate when a value is never stored, even
if it is not ultimately captured. Teach BasicAliasAnalysis that a
local object address which does not escape and is never stored does
not alias with a value resulting from a load.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89398 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/IPO/FunctionAttrs.cpp')
| -rw-r--r-- | lib/Transforms/IPO/FunctionAttrs.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Transforms/IPO/FunctionAttrs.cpp b/lib/Transforms/IPO/FunctionAttrs.cpp index b3a832f12d..a16d335ef5 100644 --- a/lib/Transforms/IPO/FunctionAttrs.cpp +++ b/lib/Transforms/IPO/FunctionAttrs.cpp @@ -212,7 +212,7 @@ bool FunctionAttrs::AddNoCaptureAttrs(const std::vector<CallGraphNode *> &SCC) { for (Function::arg_iterator A = F->arg_begin(), E = F->arg_end(); A!=E; ++A) if (isa<PointerType>(A->getType()) && !A->hasNoCaptureAttr() && - !PointerMayBeCaptured(A, true)) { + !PointerMayBeCaptured(A, true, /*StoreCaptures=*/false)) { A->addAttr(Attribute::NoCapture); ++NumNoCapture; Changed = true; @@ -280,7 +280,7 @@ bool FunctionAttrs::IsFunctionMallocLike(Function *F, return false; // Did not come from an allocation. } - if (PointerMayBeCaptured(RetVal, false)) + if (PointerMayBeCaptured(RetVal, false, /*StoreCaptures=*/false)) return false; } |