//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/CodeGen/SelectionDAGNodes.h"
namespace llvm {
- class MRegisterInfo;
-
-/// CCState - This class holds information needed while lowering arguments and
-/// return values. It captures which registers are already assigned and which
-/// stack slots are used. It provides accessors to allocate these values.
-class CCState {
- unsigned StackOffset;
- const MRegisterInfo &MRI;
- SmallVector<uint32_t, 16> UsedRegs;
-public:
- CCState(const MRegisterInfo &mri);
-
- unsigned getNextStackOffset() const { return StackOffset; }
-
- /// isAllocated - Return true if the specified register (or an alias) is
- /// allocated.
- bool isAllocated(unsigned Reg) const {
- return UsedRegs[Reg/32] & (1 << (Reg&31));
- }
-
- /// getFirstUnallocated - Return the first unallocated register in the set, or
- /// NumRegs if they are all allocated.
- unsigned getFirstUnallocated(const unsigned *Regs, unsigned NumRegs) const {
- for (unsigned i = 0; i != NumRegs; ++i)
- if (!isAllocated(Regs[i]))
- return i;
- return NumRegs;
- }
-
- /// AllocateReg - Attempt to allocate one of the specified registers. If none
- /// are available, return zero. Otherwise, return the first one available,
- /// marking it and any aliases as allocated.
- unsigned AllocateReg(const unsigned *Regs, unsigned NumRegs) {
- unsigned FirstUnalloc = getFirstUnallocated(Regs, NumRegs);
- if (FirstUnalloc == NumRegs)
- return 0; // Didn't find the reg.
-
- // Mark the register and any aliases as allocated.
- unsigned Reg = Regs[FirstUnalloc];
- MarkAllocated(Reg);
- return Reg;
- }
-
- /// AllocateStack - Allocate a chunk of stack space with the specified size
- /// and alignment.
- unsigned AllocateStack(unsigned Size, unsigned Align) {
- assert(Align && ((Align-1) & Align) == 0); // Align is power of 2.
- StackOffset = ((StackOffset + Align-1) & ~(Align-1));
- unsigned Result = StackOffset;
- StackOffset += Size;
- return Result;
- }
-private:
- /// MarkAllocated - Mark a register and all of its aliases as allocated.
- void MarkAllocated(unsigned Reg);
-};
+ class TargetRegisterInfo;
+ class TargetMachine;
+ class CCState;
+ class SDNode;
/// CCValAssign - Represent assignment of one arg/retval to a location.
class CCValAssign {
LocInfo HTP : 7;
/// ValVT - The type of the value being assigned.
- MVT::ValueType ValVT : 8;
+ MVT ValVT;
/// LocVT - The type of the location being assigned to.
- MVT::ValueType LocVT : 8;
+ MVT LocVT;
public:
- static CCValAssign getReg(unsigned ValNo, MVT::ValueType ValVT,
- unsigned RegNo, MVT::ValueType LocVT,
+ static CCValAssign getReg(unsigned ValNo, MVT ValVT,
+ unsigned RegNo, MVT LocVT,
LocInfo HTP) {
CCValAssign Ret;
Ret.ValNo = ValNo;
Ret.LocVT = LocVT;
return Ret;
}
- static CCValAssign getMem(unsigned ValNo, MVT::ValueType ValVT,
- unsigned Offset, MVT::ValueType LocVT,
+ static CCValAssign getMem(unsigned ValNo, MVT ValVT,
+ unsigned Offset, MVT LocVT,
LocInfo HTP) {
CCValAssign Ret;
Ret.ValNo = ValNo;
}
unsigned getValNo() const { return ValNo; }
- MVT::ValueType getValVT() const { return ValVT; }
+ MVT getValVT() const { return ValVT; }
bool isRegLoc() const { return !isMem; }
bool isMemLoc() const { return isMem; }
unsigned getLocReg() const { assert(isRegLoc()); return Loc; }
unsigned getLocMemOffset() const { assert(isMemLoc()); return Loc; }
- MVT::ValueType getLocVT() const { return LocVT; }
+ MVT getLocVT() const { return LocVT; }
LocInfo getLocInfo() const { return HTP; }
};
+
+/// CCAssignFn - This function assigns a location for Val, updating State to
+/// reflect the change.
+typedef bool CCAssignFn(unsigned ValNo, MVT ValVT,
+ MVT LocVT, CCValAssign::LocInfo LocInfo,
+ ISD::ArgFlagsTy ArgFlags, CCState &State);
+
+
+/// CCState - This class holds information needed while lowering arguments and
+/// return values. It captures which registers are already assigned and which
+/// stack slots are used. It provides accessors to allocate these values.
+class CCState {
+ unsigned CallingConv;
+ bool IsVarArg;
+ const TargetMachine &TM;
+ const TargetRegisterInfo &TRI;
+ SmallVector<CCValAssign, 16> &Locs;
+
+ unsigned StackOffset;
+ SmallVector<uint32_t, 16> UsedRegs;
+public:
+ CCState(unsigned CC, bool isVarArg, const TargetMachine &TM,
+ SmallVector<CCValAssign, 16> &locs);
+
+ void addLoc(const CCValAssign &V) {
+ Locs.push_back(V);
+ }
+
+ const TargetMachine &getTarget() const { return TM; }
+ unsigned getCallingConv() const { return CallingConv; }
+ bool isVarArg() const { return IsVarArg; }
+
+ unsigned getNextStackOffset() const { return StackOffset; }
+
+ /// isAllocated - Return true if the specified register (or an alias) is
+ /// allocated.
+ bool isAllocated(unsigned Reg) const {
+ return UsedRegs[Reg/32] & (1 << (Reg&31));
+ }
+
+ /// AnalyzeFormalArguments - Analyze an ISD::FORMAL_ARGUMENTS node,
+ /// incorporating info about the formals into this state.
+ void AnalyzeFormalArguments(SDNode *TheArgs, CCAssignFn Fn);
+
+ /// AnalyzeReturn - Analyze the returned values of an ISD::RET node,
+ /// incorporating info about the result values into this state.
+ void AnalyzeReturn(SDNode *TheRet, CCAssignFn Fn);
+
+ /// AnalyzeCallOperands - Analyze an ISD::CALL node, incorporating info
+ /// about the passed values into this state.
+ void AnalyzeCallOperands(CallSDNode *TheCall, CCAssignFn Fn);
+
+ /// AnalyzeCallOperands - Same as above except it takes vectors of types
+ /// and argument flags.
+ void AnalyzeCallOperands(SmallVectorImpl<MVT> &ArgVTs,
+ SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
+ CCAssignFn Fn);
+
+ /// AnalyzeCallResult - Analyze the return values of an ISD::CALL node,
+ /// incorporating info about the passed values into this state.
+ void AnalyzeCallResult(CallSDNode *TheCall, CCAssignFn Fn);
+
+ /// AnalyzeCallResult - Same as above except it's specialized for calls which
+ /// produce a single value.
+ void AnalyzeCallResult(MVT VT, CCAssignFn Fn);
+
+ /// getFirstUnallocated - Return the first unallocated register in the set, or
+ /// NumRegs if they are all allocated.
+ unsigned getFirstUnallocated(const unsigned *Regs, unsigned NumRegs) const {
+ for (unsigned i = 0; i != NumRegs; ++i)
+ if (!isAllocated(Regs[i]))
+ return i;
+ return NumRegs;
+ }
+
+ /// AllocateReg - Attempt to allocate one register. If it is not available,
+ /// return zero. Otherwise, return the register, marking it and any aliases
+ /// as allocated.
+ unsigned AllocateReg(unsigned Reg) {
+ if (isAllocated(Reg)) return 0;
+ MarkAllocated(Reg);
+ return Reg;
+ }
+
+ /// Version of AllocateReg with extra register to be shadowed.
+ unsigned AllocateReg(unsigned Reg, unsigned ShadowReg) {
+ if (isAllocated(Reg)) return 0;
+ MarkAllocated(Reg);
+ MarkAllocated(ShadowReg);
+ return Reg;
+ }
+
+ /// AllocateReg - Attempt to allocate one of the specified registers. If none
+ /// are available, return zero. Otherwise, return the first one available,
+ /// marking it and any aliases as allocated.
+ unsigned AllocateReg(const unsigned *Regs, unsigned NumRegs) {
+ unsigned FirstUnalloc = getFirstUnallocated(Regs, NumRegs);
+ if (FirstUnalloc == NumRegs)
+ return 0; // Didn't find the reg.
+
+ // Mark the register and any aliases as allocated.
+ unsigned Reg = Regs[FirstUnalloc];
+ MarkAllocated(Reg);
+ return Reg;
+ }
+
+ /// Version of AllocateReg with list of registers to be shadowed.
+ unsigned AllocateReg(const unsigned *Regs, const unsigned *ShadowRegs,
+ unsigned NumRegs) {
+ unsigned FirstUnalloc = getFirstUnallocated(Regs, NumRegs);
+ if (FirstUnalloc == NumRegs)
+ return 0; // Didn't find the reg.
+
+ // Mark the register and any aliases as allocated.
+ unsigned Reg = Regs[FirstUnalloc], ShadowReg = ShadowRegs[FirstUnalloc];
+ MarkAllocated(Reg);
+ MarkAllocated(ShadowReg);
+ return Reg;
+ }
+
+ /// AllocateStack - Allocate a chunk of stack space with the specified size
+ /// and alignment.
+ unsigned AllocateStack(unsigned Size, unsigned Align) {
+ assert(Align && ((Align-1) & Align) == 0); // Align is power of 2.
+ StackOffset = ((StackOffset + Align-1) & ~(Align-1));
+ unsigned Result = StackOffset;
+ StackOffset += Size;
+ return Result;
+ }
+
+ // HandleByVal - Allocate a stack slot large enough to pass an argument by
+ // value. The size and alignment information of the argument is encoded in its
+ // parameter attribute.
+ void HandleByVal(unsigned ValNo, MVT ValVT,
+ MVT LocVT, CCValAssign::LocInfo LocInfo,
+ int MinSize, int MinAlign, ISD::ArgFlagsTy ArgFlags);
+
+private:
+ /// MarkAllocated - Mark a register and all of its aliases as allocated.
+ void MarkAllocated(unsigned Reg);
+};
+
+
+
} // end namespace llvm
#endif
projects / oota-llvm.git / blobdiff