[PATCH] D34585: Make visible isDereferenceableAndAlignedPointer(..., const APInt &Size, ...)

[Vitaly Buka via Phabricator via llvm-commits]

vitalybuka created this revision.

Used by https://reviews.llvm.org/D34311 and https://reviews.llvm.org/D34467


https://reviews.llvm.org/D34585

Files:
  include/llvm/Analysis/Loads.h
  lib/Analysis/Loads.cpp


Index: lib/Analysis/Loads.cpp
===================================================================
--- lib/Analysis/Loads.cpp
+++ lib/Analysis/Loads.cpp
@@ -116,6 +116,16 @@
   return false;
 }
 
+bool llvm::isDereferenceableAndAlignedPointer(const Value *V, unsigned Align,
+                                              const APInt &Size,
+                                              const DataLayout &DL,
+                                              const Instruction *CtxI,
+                                              const DominatorTree *DT) {
+  SmallPtrSet<const Value *, 32> Visited;
+  return ::isDereferenceableAndAlignedPointer(V, Align, Size, DL, CtxI, DT,
+                                              Visited);
+}
+
 bool llvm::isDereferenceableAndAlignedPointer(const Value *V, unsigned Align,
                                               const DataLayout &DL,
                                               const Instruction *CtxI,
Index: include/llvm/Analysis/Loads.h
===================================================================
--- include/llvm/Analysis/Loads.h
+++ include/llvm/Analysis/Loads.h
@@ -39,6 +39,15 @@
                                         const Instruction *CtxI = nullptr,
                                         const DominatorTree *DT = nullptr);
 
+/// Returns true if V is always dereferenceable for Size byte with alignment
+/// greater or equal than requested. If the context instruction is specified
+/// performs context-sensitive analysis and returns true if the pointer is
+/// dereferenceable at the specified instruction.
+bool isDereferenceableAndAlignedPointer(const Value *V, unsigned Align,
+                                        const APInt &Size, const DataLayout &DL,
+                                        const Instruction *CtxI = nullptr,
+                                        const DominatorTree *DT = nullptr);
+
 /// Return true if we know that executing a load from this value cannot trap.
 ///
 /// If DT and ScanFrom are specified this method performs context-sensitive


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