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Add some helpers for manipulating function

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parameter attributes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53228 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2008-07-08 09:41:30 +00:00
parent 1512642973
commit cfa3c236b2
2 changed files with 40 additions and 26 deletions
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include/llvm/Function.h
+29 -9
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@@ -174,29 +174,49 @@ public:
/// addParamAttr - adds the attribute to the list of attributes.
void addParamAttr(unsigned i, ParameterAttributes attr);
/// removeParamAttr - removes the attribute from the list of attributes.
void removeParamAttr(unsigned i, ParameterAttributes attr);
/// @brief Extract the alignment for a call or parameter (0=unknown).
unsigned getParamAlignment(unsigned i) const {
return ParamAttrs.getParamAlignment(i);
}
/// @brief Determine if the function cannot return.
bool doesNotReturn() const { return paramHasAttr(0, ParamAttr::NoReturn); }
void setDoesNotThrow(bool doesNotThrow = true);
/// @brief Determine if the function cannot unwind.
bool doesNotThrow() const {
return paramHasAttr(0, ParamAttr::NoUnwind);
}
/// @brief Determine if the function does not access memory.
bool doesNotAccessMemory() const {
return paramHasAttr(0, ParamAttr::ReadNone);
}
void setDoesNotAccessMemory(bool doesNotAccessMemory = true) {
if (doesNotAccessMemory) addParamAttr(0, ParamAttr::ReadNone);
else removeParamAttr(0, ParamAttr::ReadNone);
}
/// @brief Determine if the function does not access or only reads memory.
bool onlyReadsMemory() const {
return doesNotAccessMemory() || paramHasAttr(0, ParamAttr::ReadOnly);
}
void setOnlyReadsMemory(bool onlyReadsMemory = true) {
if (onlyReadsMemory) addParamAttr(0, ParamAttr::ReadOnly);
else removeParamAttr(0, ParamAttr::ReadOnly | ParamAttr::ReadNone);
}
/// @brief Determine if the function cannot return.
bool doesNotReturn() const {
return paramHasAttr(0, ParamAttr::NoReturn);
}
void setDoesNotReturn(bool doesNotReturn = true) {
if (doesNotReturn) addParamAttr(0, ParamAttr::NoReturn);
else removeParamAttr(0, ParamAttr::NoReturn);
}
/// @brief Determine if the function cannot unwind.
bool doesNotThrow() const {
return paramHasAttr(0, ParamAttr::NoUnwind);
}
void setDoesNotThrow(bool doesNotThrow = true) {
if (doesNotThrow) addParamAttr(0, ParamAttr::NoUnwind);
else removeParamAttr(0, ParamAttr::NoUnwind);
}
/// @brief Determine if the function returns a structure through first
/// pointer argument.