<dt><tt>noimplicitfloat</tt></dt>
<dd>This attributes disables implicit floating point instructions.</dd>
+<dt><tt>naked</tt></dt>
+<dd>This attribute disables prologue / epilogue emission for the function</dd>
+
</dl>
</div>
LLVMByValAttribute = 1<<7,
LLVMNestAttribute = 1<<8,
LLVMReadNoneAttribute = 1<<9,
- LLVMReadOnlyAttribute = 1<<10
+ LLVMReadOnlyAttribute = 1<<10,
+ LLVMNakedAttribute = 1<<24
} LLVMAttribute;
typedef enum {
const Attributes NoRedZone = 1<<22; /// disable redzone
const Attributes NoImplicitFloat = 1<<23; /// disable implicit floating point
/// instructions.
+const Attributes Naked = 1<<24; ///< Naked function
/// @brief Attributes that only apply to function parameters.
const Attributes ParameterOnly = ByVal | Nest | StructRet | NoCapture;
/// be used on return values or function parameters.
const Attributes FunctionOnly = NoReturn | NoUnwind | ReadNone | ReadOnly |
NoInline | AlwaysInline | OptimizeForSize | StackProtect | StackProtectReq |
- NoRedZone | NoImplicitFloat;
+ NoRedZone | NoImplicitFloat | Naked;
/// @brief Parameter attributes that do not apply to vararg call arguments.
const Attributes VarArgsIncompatible = StructRet;
KEYWORD(sspreq);
KEYWORD(noredzone);
KEYWORD(noimplicitfloat);
+ KEYWORD(naked);
KEYWORD(type);
KEYWORD(opaque);
case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break;
case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break;
case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break;
+ case lltok::kw_naked: Attrs |= Attribute::Naked; break;
case lltok::kw_align: {
unsigned Alignment;
kw_sspreq,
kw_noredzone,
kw_noimplicitfloat,
+ kw_naked,
kw_type,
kw_opaque,
/// frame indexes with appropriate references.
///
bool PEI::runOnMachineFunction(MachineFunction &Fn) {
+ const Function* F = Fn.getFunction();
const TargetRegisterInfo *TRI = Fn.getTarget().getRegisterInfo();
RS = TRI->requiresRegisterScavenging(Fn) ? new RegScavenger() : NULL;
placeCSRSpillsAndRestores(Fn);
// Add the code to save and restore the callee saved registers
- insertCSRSpillsAndRestores(Fn);
+ if (!F->hasFnAttr(Attribute::Naked))
+ insertCSRSpillsAndRestores(Fn);
// Allow the target machine to make final modifications to the function
// before the frame layout is finalized.
// called functions. Because of this, calculateCalleeSavedRegisters
// must be called before this function in order to set the HasCalls
// and MaxCallFrameSize variables.
- insertPrologEpilogCode(Fn);
+ if (!F->hasFnAttr(Attribute::Naked))
+ insertPrologEpilogCode(Fn);
// Replace all MO_FrameIndex operands with physical register references
// and actual offsets.
if (Attrs & Attribute::NoCapture)
Result += "nocapture ";
if (Attrs & Attribute::StructRet)
- Result += "sret ";
+ Result += "sret ";
if (Attrs & Attribute::ByVal)
Result += "byval ";
if (Attrs & Attribute::Nest)
Result += "noredzone ";
if (Attrs & Attribute::NoImplicitFloat)
Result += "noimplicitfloat ";
+ if (Attrs & Attribute::Naked)
+ Result += "naked ";
if (Attrs & Attribute::Alignment) {
Result += "align ";
Result += utostr(Attribute::getAlignmentFromAttrs(Attrs));