Revert "Merged @luckyluke's change for detecting overflow of unsigned add, sub"

Will redo the merge to preserve original commits.

This reverts commit a743d7072d9ccf11f96e3df45f25ad07da6ad9d6.

2 files changed, 0 insertions, 43 deletions

diff --git a/lib/Core/SpecialFunctionHandler.cpp b/lib/Core/SpecialFunctionHandler.cpp
index 43185511..59e269cb 100644
--- a/lib/Core/SpecialFunctionHandler.cpp
+++ b/lib/Core/SpecialFunctionHandler.cpp
@@ -108,12 +108,6 @@ static SpecialFunctionHandler::HandlerInfo handlerInfo[] = {
   // operator new(unsigned long)
   add("_Znwm", handleNew, true),
 
-  // clang -fsanitize=unsigned-integer-overflow
-  add("__ubsan_handle_add_overflow", handleAddOverflow, false),
-  add("__ubsan_handle_sub_overflow", handleSubOverflow, false),
-  add("__ubsan_handle_mul_overflow", handleMulOverflow, false),
-  add("__ubsan_handle_divrem_overflow", handleDivRemOverflow, false),
-
 #undef addDNR
 #undef add  
 };
@@ -713,36 +707,3 @@ void SpecialFunctionHandler::handleMarkGlobal(ExecutionState &state,
     mo->isGlobal = true;
   }
 }
-
-void SpecialFunctionHandler::handleAddOverflow(ExecutionState &state,
-                                               KInstruction *target,
-                                               std::vector<ref<Expr> > &arguments) {
-  executor.terminateStateOnError(state,
-                                 "overflow on unsigned addition",
-                                 "overflow.err");
-}
-
-void SpecialFunctionHandler::handleSubOverflow(ExecutionState &state,
-                                               KInstruction *target,
-                                               std::vector<ref<Expr> > &arguments) {
-  executor.terminateStateOnError(state,
-                                 "overflow on unsigned subtraction",
-                                 "overflow.err");
-}
-
-void SpecialFunctionHandler::handleMulOverflow(ExecutionState &state,
-                                               KInstruction *target,
-                                               std::vector<ref<Expr> > &arguments) {
-  executor.terminateStateOnError(state,
-                                 "overflow on unsigned multiplication",
-                                 "overflow.err");
-}
-
-void SpecialFunctionHandler::handleDivRemOverflow(ExecutionState &state,
-                                               KInstruction *target,
-                                               std::vector<ref<Expr> > &arguments) {
-  executor.terminateStateOnError(state,
-                                 "overflow on division or remainder",
-                                 "overflow.err");
-}
-
diff --git a/lib/Core/SpecialFunctionHandler.h b/lib/Core/SpecialFunctionHandler.h
index d52b8fc5..f68c6edb 100644
--- a/lib/Core/SpecialFunctionHandler.h
+++ b/lib/Core/SpecialFunctionHandler.h
@@ -132,10 +132,6 @@ namespace klee {
     HANDLER(handleUnderConstrained);
     HANDLER(handleWarning);
     HANDLER(handleWarningOnce);
-    HANDLER(handleAddOverflow);
-    HANDLER(handleMulOverflow);
-    HANDLER(handleSubOverflow);
-    HANDLER(handleDivRemOverflow);
 #undef HANDLER
   };
 } // End klee namespace