refactor the MemoryBuiltin analysis:
- provide more extensive set of functions to detect library allocation functions (e.g., malloc, calloc, strdup, etc)
- provide an API to compute the size and offset of an object pointed by
Move a few clients (GVN, AA, instcombine, ...) to the new API.
This implementation is a lot more aggressive than each of the custom implementations being replaced.
Patch reviewed by Nick Lewycky and Chandler Carruth, thanks.
llvm-svn: 158919
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index b08f8e2..8e59274 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -266,7 +266,7 @@
return isa<UndefValue>(II->getArgOperand(1));
}
- if (extractMallocCall(I) || extractCallocCall(I)) return true;
+ if (isAllocLikeFn(I)) return true;
if (CallInst *CI = isFreeCall(I))
if (Constant *C = dyn_cast<Constant>(CI->getArgOperand(0)))