[CFLAA] Move a common function to the header to reduce duplication.

Differential Revision:  https://reviews.llvm.org/D34660

llvm-svn: 306354

1 files changed, 15 insertions, 0 deletions

diff --git a/llvm/include/llvm/Analysis/CFLAliasAnalysisUtils.h b/llvm/include/llvm/Analysis/CFLAliasAnalysisUtils.h
index 411626438c7..e21817852e6 100644
--- a/llvm/include/llvm/Analysis/CFLAliasAnalysisUtils.h
+++ b/llvm/include/llvm/Analysis/CFLAliasAnalysisUtils.h
@@ -41,4 +41,19 @@ private:
   }
 };
 
+namespace llvm {
+namespace cflaa {
+static inline const Function *parentFunctionOfValue(const Value *Val) {
+  if (auto *Inst = dyn_cast<Instruction>(Val)) {
+    auto *Bb = Inst->getParent();
+    return Bb->getParent();
+  }
+
+  if (auto *Arg = dyn_cast<Argument>(Val))
+    return Arg->getParent();
+  return nullptr;
+} // namespace cflaa
+} // namespace llvm
+}
+
 #endif // LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H