[MemoryBuiltins] Add isMallocOrCallocLikeFn so BasicAA can check for both at the same time
BasicAA wants to know if a function is either a malloc or calloc like function. Currently we have to check both separately. This means both calls check if its an intrinsic, query TLI, check the nobuiltin attribute, scan the AllocationFnData, etc.
This patch adds a isMallocOrCallocLikeFn so we can go through all of the checks once per call.
This also changes the one other location I saw that called both together.
Differential Revision: https://reviews.llvm.org/D32188
llvm-svn: 300608
diff --git a/llvm/lib/Analysis/MemoryBuiltins.cpp b/llvm/lib/Analysis/MemoryBuiltins.cpp
index 2fee95d..7983d62 100644
--- a/llvm/lib/Analysis/MemoryBuiltins.cpp
+++ b/llvm/lib/Analysis/MemoryBuiltins.cpp
@@ -37,6 +37,7 @@
CallocLike = 1<<2, // allocates + bzero
ReallocLike = 1<<3, // reallocates
StrDupLike = 1<<4,
+ MallocOrCallocLike = MallocLike | CallocLike,
AllocLike = MallocLike | CallocLike | StrDupLike,
AnyAlloc = AllocLike | ReallocLike
};
@@ -220,6 +221,14 @@
}
/// \brief Tests if a value is a call or invoke to a library function that
+/// allocates memory similiar to malloc or calloc.
+bool llvm::isMallocOrCallocLikeFn(const Value *V, const TargetLibraryInfo *TLI,
+ bool LookThroughBitCast) {
+ return getAllocationData(V, MallocOrCallocLike, TLI,
+ LookThroughBitCast).hasValue();
+}
+
+/// \brief Tests if a value is a call or invoke to a library function that
/// allocates memory (either malloc, calloc, or strdup like).
bool llvm::isAllocLikeFn(const Value *V, const TargetLibraryInfo *TLI,
bool LookThroughBitCast) {