+ return doesNotAccessMemory() || hasFnAttr(Attribute::ReadOnly);
+ }
+ void setOnlyReadsMemory(bool OnlyReadsMemory = true) {
+ if (OnlyReadsMemory) addFnAttr(Attribute::ReadOnly);
+ else removeFnAttr(Attribute::ReadOnly | Attribute::ReadNone);
+ }
+
+ /// @brief Determine if the function cannot return.
+ bool doesNotReturn() const {
+ return hasFnAttr(Attribute::NoReturn);
+ }
+ void setDoesNotReturn(bool DoesNotReturn = true) {
+ if (DoesNotReturn) addFnAttr(Attribute::NoReturn);
+ else removeFnAttr(Attribute::NoReturn);
+ }
+
+ /// @brief Determine if the function cannot unwind.
+ bool doesNotThrow() const {
+ return hasFnAttr(Attribute::NoUnwind);
+ }
+ void setDoesNotThrow(bool DoesNotThrow = true) {
+ if (DoesNotThrow) addFnAttr(Attribute::NoUnwind);
+ else removeFnAttr(Attribute::NoUnwind);
+ }
+
+ /// @brief True if the ABI mandates (or the user requested) that this
+ /// function be in a unwind table.
+ bool hasUWTable() const {
+ return hasFnAttr(Attribute::UWTable);
+ }
+ void setHasUWTable(bool HasUWTable = true) {
+ if (HasUWTable)
+ addFnAttr(Attribute::UWTable);
+ else
+ removeFnAttr(Attribute::UWTable);
+ }
+
+ /// @brief True if this function needs an unwind table.
+ bool needsUnwindTableEntry() const {
+ return hasUWTable() || !doesNotThrow();
+ }
+
+ /// @brief Determine if the function returns a structure through first
+ /// pointer argument.
+ bool hasStructRetAttr() const {
+ return paramHasAttr(1, Attribute::StructRet);
+ }
+
+ /// @brief Determine if the parameter does not alias other parameters.
+ /// @param n The parameter to check. 1 is the first parameter, 0 is the return
+ bool doesNotAlias(unsigned n) const {
+ return paramHasAttr(n, Attribute::NoAlias);
+ }
+ void setDoesNotAlias(unsigned n, bool DoesNotAlias = true) {
+ if (DoesNotAlias) addAttribute(n, Attribute::NoAlias);
+ else removeAttribute(n, Attribute::NoAlias);