// in the backend.
enum {
+ // Fixed operands on an INLINEASM SDNode.
Op_InputChain = 0,
Op_AsmString = 1,
Op_MDNode = 2,
Op_ExtraInfo = 3, // HasSideEffects, IsAlignStack
Op_FirstOperand = 4,
+ // Fixed operands on an INLINEASM MachineInstr.
MIOp_AsmString = 0,
MIOp_ExtraInfo = 1, // HasSideEffects, IsAlignStack
MIOp_FirstOperand = 2,
+ // Interpretation of the MIOp_ExtraInfo bit field.
Extra_HasSideEffects = 1,
Extra_IsAlignStack = 2,
-
- Kind_RegUse = 1,
- Kind_RegDef = 2,
- Kind_Imm = 3,
- Kind_Mem = 4,
- Kind_RegDefEarlyClobber = 6,
-
+
+ // Inline asm operands map to multiple SDNode / MachineInstr operands.
+ // The first operand is an immediate describing the asm operand, the low
+ // bits is the kind:
+ Kind_RegUse = 1, // Input register, "r".
+ Kind_RegDef = 2, // Output register, "=r".
+ Kind_RegDefEarlyClobber = 3, // Early-clobber output register, "=&r".
+ Kind_Clobber = 4, // Clobbered register, "~r".
+ Kind_Imm = 5, // Immediate.
+ Kind_Mem = 6, // Memory operand, "m".
+
Flag_MatchingOperand = 0x80000000
};
static bool isRegDefEarlyClobberKind(unsigned Flag) {
return getKind(Flag) == Kind_RegDefEarlyClobber;
}
-
+ static bool isClobberKind(unsigned Flag) {
+ return getKind(Flag) == Kind_Clobber;
+ }
+
/// getNumOperandRegisters - Extract the number of registers field from the
/// inline asm operand flag.
static unsigned getNumOperandRegisters(unsigned Flag) {