[InstCombine] Annotate strdup with deref_or_null
llvm-svn: 372098
diff --git a/llvm/lib/Analysis/MemoryBuiltins.cpp b/llvm/lib/Analysis/MemoryBuiltins.cpp
index 52f3123..5acdeb6 100644
--- a/llvm/lib/Analysis/MemoryBuiltins.cpp
+++ b/llvm/lib/Analysis/MemoryBuiltins.cpp
@@ -307,6 +307,13 @@
return getAllocationData(V, OpNewLike, TLI, LookThroughBitCast).hasValue();
}
+/// Tests if a value is a call or invoke to a library function that
+/// allocates memory (strdup, strndup).
+bool llvm::isStrdupLikeFn(const Value *V, const TargetLibraryInfo *TLI,
+ bool LookThroughBitCast) {
+ return getAllocationData(V, StrDupLike, TLI, LookThroughBitCast).hasValue();
+}
+
/// extractMallocCall - Returns the corresponding CallInst if the instruction
/// is a malloc call. Since CallInst::CreateMalloc() only creates calls, we
/// ignore InvokeInst here.