Extracted out some useful common functions in IdempotentOperationChecker to their own CheckerHelpers file.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109560 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/CheckerHelpers.cpp b/lib/Checker/CheckerHelpers.cpp
new file mode 100644
index 0000000..8a295fb
--- /dev/null
+++ b/lib/Checker/CheckerHelpers.cpp
@@ -0,0 +1,82 @@
+//===---- CheckerHelpers.cpp - Helper functions for checkers ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines several static functions for use in checkers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Checker/PathSensitive/CheckerHelpers.h"
+#include "clang/AST/Expr.h"
+
+// Recursively find any substatements containing macros
+bool clang::containsMacro(const Stmt *S) {
+ if (S->getLocStart().isMacroID())
+ return true;
+
+ if (S->getLocEnd().isMacroID())
+ return true;
+
+ for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end();
+ ++I)
+ if (const Stmt *child = *I)
+ if (containsMacro(child))
+ return true;
+
+ return false;
+}
+
+// Recursively find any substatements containing enum constants
+bool clang::containsEnum(const Stmt *S) {
+ const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(S);
+
+ if (DR && isa<EnumConstantDecl>(DR->getDecl()))
+ return true;
+
+ for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end();
+ ++I)
+ if (const Stmt *child = *I)
+ if (containsEnum(child))
+ return true;
+
+ return false;
+}
+
+// Recursively find any substatements containing static vars
+bool clang::containsStaticLocal(const Stmt *S) {
+ const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(S);
+
+ if (DR)
+ if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()))
+ if (VD->isStaticLocal())
+ return true;
+
+ for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end();
+ ++I)
+ if (const Stmt *child = *I)
+ if (containsStaticLocal(child))
+ return true;
+
+ return false;
+}
+
+// Recursively find any substatements containing __builtin_offset_of
+bool clang::containsBuiltinOffsetOf(const Stmt *S) {
+ const UnaryOperator *UO = dyn_cast<UnaryOperator>(S);
+
+ if (UO && UO->getOpcode() == UnaryOperator::OffsetOf)
+ return true;
+
+ for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end();
+ ++I)
+ if (const Stmt *child = *I)
+ if (containsBuiltinOffsetOf(child))
+ return true;
+
+ return false;
+}