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| author | Dan Gohman <gohman@apple.com> | 2010-11-11 21:23:25 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-11-11 21:23:25 +0000 |
| commit | 4d70a2949007edeaad4662d5cdcb2d272cb2b2ff (patch) | |
| tree | 107a06a85b499d7d22a2535322267b7966c4a9fb /include/llvm/Value.h | |
| parent | 410cb57524e3bfb022df20091ae4a5fa1fa7005d (diff) | |
| download | external_llvm-4d70a2949007edeaad4662d5cdcb2d272cb2b2ff.zip external_llvm-4d70a2949007edeaad4662d5cdcb2d272cb2b2ff.tar.gz external_llvm-4d70a2949007edeaad4662d5cdcb2d272cb2b2ff.tar.bz2 | |
Factor out Instruction::isSafeToSpeculativelyExecute's code for
testing for dereferenceable pointers into a helper function,
isDereferenceablePointer. Teach it how to reason about GEPs
with simple non-zero indices.
Also eliminate ArgumentPromtion's IsAlwaysValidPointer,
which didn't check for weak externals or out of range gep
indices.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118840 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Value.h')
| -rw-r--r-- | include/llvm/Value.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/Value.h b/include/llvm/Value.h index 8740f35..8dc4105 100644 --- a/include/llvm/Value.h +++ b/include/llvm/Value.h @@ -294,6 +294,10 @@ public: const Value *getUnderlyingObject(unsigned MaxLookup = 6) const { return const_cast<Value*>(this)->getUnderlyingObject(MaxLookup); } + + /// isDereferenceablePointer - Test if this value is always a pointer to + /// allocated and suitably aligned memory for a simple load or store. + bool isDereferenceablePointer() const; /// DoPHITranslation - If this value is a PHI node with CurBB as its parent, /// return the value in the PHI node corresponding to PredBB. If not, return |