//
let Namespace = "X86" in {
+ // Subregister indices.
+ def sub_8bit : SubRegIndex;
+ def sub_8bit_hi : SubRegIndex;
+ def sub_16bit : SubRegIndex;
+ def sub_32bit : SubRegIndex;
+
+ def sub_ss : SubRegIndex;
+ def sub_sd : SubRegIndex;
+ def sub_xmm : SubRegIndex;
+
+
// In the register alias definitions below, we define which registers alias
// which others. We only specify which registers the small registers alias,
// because the register file generator is smart enough to figure out that
def R14B : Register<"r14b">, DwarfRegNum<[14, -2, -2]>;
def R15B : Register<"r15b">, DwarfRegNum<[15, -2, -2]>;
- // High registers X86-32 only
+ // High registers. On x86-64, these cannot be used in any instruction
+ // with a REX prefix.
def AH : Register<"ah">, DwarfRegNum<[0, 0, 0]>;
def DH : Register<"dh">, DwarfRegNum<[1, 2, 2]>;
def CH : Register<"ch">, DwarfRegNum<[2, 1, 1]>;
def BH : Register<"bh">, DwarfRegNum<[3, 3, 3]>;
// 16-bit registers
- def AX : RegisterWithSubRegs<"ax", [AH,AL]>, DwarfRegNum<[0, 0, 0]>;
- def DX : RegisterWithSubRegs<"dx", [DH,DL]>, DwarfRegNum<[1, 2, 2]>;
- def CX : RegisterWithSubRegs<"cx", [CH,CL]>, DwarfRegNum<[2, 1, 1]>;
- def BX : RegisterWithSubRegs<"bx", [BH,BL]>, DwarfRegNum<[3, 3, 3]>;
+ let SubRegIndices = [sub_8bit, sub_8bit_hi] in {
+ def AX : RegisterWithSubRegs<"ax", [AL,AH]>, DwarfRegNum<[0, 0, 0]>;
+ def DX : RegisterWithSubRegs<"dx", [DL,DH]>, DwarfRegNum<[1, 2, 2]>;
+ def CX : RegisterWithSubRegs<"cx", [CL,CH]>, DwarfRegNum<[2, 1, 1]>;
+ def BX : RegisterWithSubRegs<"bx", [BL,BH]>, DwarfRegNum<[3, 3, 3]>;
+ }
+ let SubRegIndices = [sub_8bit] in {
def SI : RegisterWithSubRegs<"si", [SIL]>, DwarfRegNum<[4, 6, 6]>;
def DI : RegisterWithSubRegs<"di", [DIL]>, DwarfRegNum<[5, 7, 7]>;
def BP : RegisterWithSubRegs<"bp", [BPL]>, DwarfRegNum<[6, 4, 5]>;
def SP : RegisterWithSubRegs<"sp", [SPL]>, DwarfRegNum<[7, 5, 4]>;
+ }
def IP : Register<"ip">, DwarfRegNum<[16]>;
// X86-64 only
+ let SubRegIndices = [sub_8bit] in {
def R8W : RegisterWithSubRegs<"r8w", [R8B]>, DwarfRegNum<[8, -2, -2]>;
def R9W : RegisterWithSubRegs<"r9w", [R9B]>, DwarfRegNum<[9, -2, -2]>;
def R10W : RegisterWithSubRegs<"r10w", [R10B]>, DwarfRegNum<[10, -2, -2]>;
def R13W : RegisterWithSubRegs<"r13w", [R13B]>, DwarfRegNum<[13, -2, -2]>;
def R14W : RegisterWithSubRegs<"r14w", [R14B]>, DwarfRegNum<[14, -2, -2]>;
def R15W : RegisterWithSubRegs<"r15w", [R15B]>, DwarfRegNum<[15, -2, -2]>;
-
+ }
// 32-bit registers
+ let SubRegIndices = [sub_16bit] in {
def EAX : RegisterWithSubRegs<"eax", [AX]>, DwarfRegNum<[0, 0, 0]>;
def EDX : RegisterWithSubRegs<"edx", [DX]>, DwarfRegNum<[1, 2, 2]>;
def ECX : RegisterWithSubRegs<"ecx", [CX]>, DwarfRegNum<[2, 1, 1]>;
def R13D : RegisterWithSubRegs<"r13d", [R13W]>, DwarfRegNum<[13, -2, -2]>;
def R14D : RegisterWithSubRegs<"r14d", [R14W]>, DwarfRegNum<[14, -2, -2]>;
def R15D : RegisterWithSubRegs<"r15d", [R15W]>, DwarfRegNum<[15, -2, -2]>;
+ }
// 64-bit registers, X86-64 only
+ let SubRegIndices = [sub_32bit] in {
def RAX : RegisterWithSubRegs<"rax", [EAX]>, DwarfRegNum<[0, -2, -2]>;
def RDX : RegisterWithSubRegs<"rdx", [EDX]>, DwarfRegNum<[1, -2, -2]>;
def RCX : RegisterWithSubRegs<"rcx", [ECX]>, DwarfRegNum<[2, -2, -2]>;
def R14 : RegisterWithSubRegs<"r14", [R14D]>, DwarfRegNum<[14, -2, -2]>;
def R15 : RegisterWithSubRegs<"r15", [R15D]>, DwarfRegNum<[15, -2, -2]>;
def RIP : RegisterWithSubRegs<"rip", [EIP]>, DwarfRegNum<[16, -2, -2]>;
+ }
// MMX Registers. These are actually aliased to ST0 .. ST7
def MM0 : Register<"mm0">, DwarfRegNum<[41, 29, 29]>;
def MM5 : Register<"mm5">, DwarfRegNum<[46, 34, 34]>;
def MM6 : Register<"mm6">, DwarfRegNum<[47, 35, 35]>;
def MM7 : Register<"mm7">, DwarfRegNum<[48, 36, 36]>;
-
+
// Pseudo Floating Point registers
def FP0 : Register<"fp0">;
def FP1 : Register<"fp1">;
def FP3 : Register<"fp3">;
def FP4 : Register<"fp4">;
def FP5 : Register<"fp5">;
- def FP6 : Register<"fp6">;
+ def FP6 : Register<"fp6">;
- // XMM Registers, used by the various SSE instruction set extensions
+ // XMM Registers, used by the various SSE instruction set extensions.
+ // The sub_ss and sub_sd subregs are the same registers with another regclass.
+ let CompositeIndices = [(sub_ss), (sub_sd)] in {
def XMM0: Register<"xmm0">, DwarfRegNum<[17, 21, 21]>;
def XMM1: Register<"xmm1">, DwarfRegNum<[18, 22, 22]>;
def XMM2: Register<"xmm2">, DwarfRegNum<[19, 23, 23]>;
def XMM13: Register<"xmm13">, DwarfRegNum<[30, -2, -2]>;
def XMM14: Register<"xmm14">, DwarfRegNum<[31, -2, -2]>;
def XMM15: Register<"xmm15">, DwarfRegNum<[32, -2, -2]>;
+ }
+
+ // YMM Registers, used by AVX instructions
+ let SubRegIndices = [sub_xmm] in {
+ def YMM0: RegisterWithSubRegs<"ymm0", [XMM0]>, DwarfRegNum<[17, 21, 21]>;
+ def YMM1: RegisterWithSubRegs<"ymm1", [XMM1]>, DwarfRegNum<[18, 22, 22]>;
+ def YMM2: RegisterWithSubRegs<"ymm2", [XMM2]>, DwarfRegNum<[19, 23, 23]>;
+ def YMM3: RegisterWithSubRegs<"ymm3", [XMM3]>, DwarfRegNum<[20, 24, 24]>;
+ def YMM4: RegisterWithSubRegs<"ymm4", [XMM4]>, DwarfRegNum<[21, 25, 25]>;
+ def YMM5: RegisterWithSubRegs<"ymm5", [XMM5]>, DwarfRegNum<[22, 26, 26]>;
+ def YMM6: RegisterWithSubRegs<"ymm6", [XMM6]>, DwarfRegNum<[23, 27, 27]>;
+ def YMM7: RegisterWithSubRegs<"ymm7", [XMM7]>, DwarfRegNum<[24, 28, 28]>;
+ def YMM8: RegisterWithSubRegs<"ymm8", [XMM8]>, DwarfRegNum<[25, -2, -2]>;
+ def YMM9: RegisterWithSubRegs<"ymm9", [XMM9]>, DwarfRegNum<[26, -2, -2]>;
+ def YMM10: RegisterWithSubRegs<"ymm10", [XMM10]>, DwarfRegNum<[27, -2, -2]>;
+ def YMM11: RegisterWithSubRegs<"ymm11", [XMM11]>, DwarfRegNum<[28, -2, -2]>;
+ def YMM12: RegisterWithSubRegs<"ymm12", [XMM12]>, DwarfRegNum<[29, -2, -2]>;
+ def YMM13: RegisterWithSubRegs<"ymm13", [XMM13]>, DwarfRegNum<[30, -2, -2]>;
+ def YMM14: RegisterWithSubRegs<"ymm14", [XMM14]>, DwarfRegNum<[31, -2, -2]>;
+ def YMM15: RegisterWithSubRegs<"ymm15", [XMM15]>, DwarfRegNum<[32, -2, -2]>;
+ }
// Floating point stack registers
def ST0 : Register<"st(0)">, DwarfRegNum<[33, 12, 11]>;
// Status flags register
def EFLAGS : Register<"flags">;
-}
-
-//===----------------------------------------------------------------------===//
-// Subregister Set Definitions... now that we have all of the pieces, define the
-// sub registers for each register.
-//
+ // Segment registers
+ def CS : Register<"cs">;
+ def DS : Register<"ds">;
+ def SS : Register<"ss">;
+ def ES : Register<"es">;
+ def FS : Register<"fs">;
+ def GS : Register<"gs">;
+
+ // Debug registers
+ def DR0 : Register<"dr0">;
+ def DR1 : Register<"dr1">;
+ def DR2 : Register<"dr2">;
+ def DR3 : Register<"dr3">;
+ def DR4 : Register<"dr4">;
+ def DR5 : Register<"dr5">;
+ def DR6 : Register<"dr6">;
+ def DR7 : Register<"dr7">;
+
+ // Control registers
+ def CR0 : Register<"cr0">;
+ def CR1 : Register<"cr1">;
+ def CR2 : Register<"cr2">;
+ def CR3 : Register<"cr3">;
+ def CR4 : Register<"cr4">;
+ def CR5 : Register<"cr5">;
+ def CR6 : Register<"cr6">;
+ def CR7 : Register<"cr7">;
+ def CR8 : Register<"cr8">;
+ def CR9 : Register<"cr9">;
+ def CR10 : Register<"cr10">;
+ def CR11 : Register<"cr11">;
+ def CR12 : Register<"cr12">;
+ def CR13 : Register<"cr13">;
+ def CR14 : Register<"cr14">;
+ def CR15 : Register<"cr15">;
+
+ // Pseudo index registers
+ def EIZ : Register<"eiz">;
+ def RIZ : Register<"riz">;
+}
-def x86_subreg_8bit : PatLeaf<(i32 1)>;
-def x86_subreg_16bit : PatLeaf<(i32 2)>;
-def x86_subreg_32bit : PatLeaf<(i32 3)>;
-
-def : SubRegSet<1, [AX, CX, DX, BX, SP, BP, SI, DI,
- R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W],
- [AL, CL, DL, BL, SPL, BPL, SIL, DIL,
- R8B, R9B, R10B, R11B, R12B, R13B, R14B, R15B]>;
-
-// It's unclear if this subreg set is safe, given that not all registers
-// in the class have an 'H' subreg.
-// def : SubRegSet<2, [AX, CX, DX, BX],
-// [AH, CH, DH, BH]>;
-
-def : SubRegSet<1, [EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
- R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D],
- [AL, CL, DL, BL, SPL, BPL, SIL, DIL,
- R8B, R9B, R10B, R11B, R12B, R13B, R14B, R15B]>;
-
-def : SubRegSet<2, [EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
- R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D],
- [AX, CX, DX, BX, SP, BP, SI, DI,
- R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W]>;
-
-
-def : SubRegSet<1, [RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
- R8, R9, R10, R11, R12, R13, R14, R15],
- [AL, CL, DL, BL, SPL, BPL, SIL, DIL,
- R8B, R9B, R10B, R11B, R12B, R13B, R14B, R15B]>;
-
-def : SubRegSet<2, [RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
- R8, R9, R10, R11, R12, R13, R14, R15],
- [AX, CX, DX, BX, SP, BP, SI, DI,
- R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W]>;
-
-def : SubRegSet<3, [RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
- R8, R9, R10, R11, R12, R13, R14, R15],
- [EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
- R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D]>;
//===----------------------------------------------------------------------===//
// Register Class Definitions... now that we have all of the pieces, define the
// R8B, ... R15B.
// Allocate R12 and R13 last, as these require an extra byte when
// encoded in x86_64 instructions.
-// FIXME: Allow AH, CH, DH, BH in 64-mode for non-REX instructions,
+// FIXME: Allow AH, CH, DH, BH to be used as general-purpose registers in
+// 64-bit mode. The main complication is that they cannot be encoded in an
+// instruction requiring a REX prefix, while SIL, DIL, BPL, R8D, etc.
+// require a REX prefix. For example, "addb %ah, %dil" and "movzbl %ah, %r8d"
+// cannot be encoded.
def GR8 : RegisterClass<"X86", [i8], 8,
- [AL, CL, DL, BL, AH, CH, DH, BH, SIL, DIL, BPL, SPL,
+ [AL, CL, DL, AH, CH, DH, BL, BH, SIL, DIL, BPL, SPL,
R8B, R9B, R10B, R11B, R14B, R15B, R12B, R13B]> {
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
- // Does the function dedicate RBP / EBP to being a frame ptr?
- // If so, don't allocate SPL or BPL.
- static const unsigned X86_GR8_AO_64_fp[] = {
- X86::AL, X86::CL, X86::DL, X86::SIL, X86::DIL,
- X86::R8B, X86::R9B, X86::R10B, X86::R11B,
- X86::BL, X86::R14B, X86::R15B, X86::R12B, X86::R13B
- };
- // If not, just don't allocate SPL.
static const unsigned X86_GR8_AO_64[] = {
X86::AL, X86::CL, X86::DL, X86::SIL, X86::DIL,
X86::R8B, X86::R9B, X86::R10B, X86::R11B,
X86::BL, X86::R14B, X86::R15B, X86::R12B, X86::R13B, X86::BPL
};
- // In 32-mode, none of the 8-bit registers aliases EBP or ESP.
- static const unsigned X86_GR8_AO_32[] = {
- X86::AL, X86::CL, X86::DL, X86::AH, X86::CH, X86::DH, X86::BL, X86::BH
- };
GR8Class::iterator
GR8Class::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
- if (!Subtarget.is64Bit())
- return X86_GR8_AO_32;
- else if (RI->hasFP(MF))
- return X86_GR8_AO_64_fp;
- else
+ if (Subtarget.is64Bit())
return X86_GR8_AO_64;
+ else
+ return begin();
}
GR8Class::iterator
GR8Class::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ // Does the function dedicate RBP / EBP to being a frame ptr?
if (!Subtarget.is64Bit())
- return X86_GR8_AO_32 + (sizeof(X86_GR8_AO_32) / sizeof(unsigned));
- else if (RI->hasFP(MF))
- return X86_GR8_AO_64_fp + (sizeof(X86_GR8_AO_64_fp) / sizeof(unsigned));
+ // In 32-mode, none of the 8-bit registers aliases EBP or ESP.
+ return begin() + 8;
+ else if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate SPL or BPL.
+ return array_endof(X86_GR8_AO_64) - 1;
else
- return X86_GR8_AO_64 + (sizeof(X86_GR8_AO_64) / sizeof(unsigned));
+ // If not, just don't allocate SPL.
+ return array_endof(X86_GR8_AO_64);
}
}];
}
-
def GR16 : RegisterClass<"X86", [i16], 16,
[AX, CX, DX, SI, DI, BX, BP, SP,
R8W, R9W, R10W, R11W, R14W, R15W, R12W, R13W]> {
- let SubRegClassList = [GR8];
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi)];
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
- // Does the function dedicate RBP / EBP to being a frame ptr?
- // If so, don't allocate SP or BP.
- static const unsigned X86_GR16_AO_64_fp[] = {
- X86::AX, X86::CX, X86::DX, X86::SI, X86::DI,
- X86::R8W, X86::R9W, X86::R10W, X86::R11W,
- X86::BX, X86::R14W, X86::R15W, X86::R12W, X86::R13W
- };
- static const unsigned X86_GR16_AO_32_fp[] = {
- X86::AX, X86::CX, X86::DX, X86::SI, X86::DI, X86::BX
- };
- // If not, just don't allocate SPL.
static const unsigned X86_GR16_AO_64[] = {
X86::AX, X86::CX, X86::DX, X86::SI, X86::DI,
X86::R8W, X86::R9W, X86::R10W, X86::R11W,
X86::BX, X86::R14W, X86::R15W, X86::R12W, X86::R13W, X86::BP
};
- static const unsigned X86_GR16_AO_32[] = {
- X86::AX, X86::CX, X86::DX, X86::SI, X86::DI, X86::BX, X86::BP
- };
GR16Class::iterator
GR16Class::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
- if (Subtarget.is64Bit()) {
- if (RI->hasFP(MF))
- return X86_GR16_AO_64_fp;
- else
- return X86_GR16_AO_64;
- } else {
- if (RI->hasFP(MF))
- return X86_GR16_AO_32_fp;
- else
- return X86_GR16_AO_32;
- }
+ if (Subtarget.is64Bit())
+ return X86_GR16_AO_64;
+ else
+ return begin();
}
GR16Class::iterator
GR16Class::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
if (Subtarget.is64Bit()) {
- if (RI->hasFP(MF))
- return X86_GR16_AO_64_fp+(sizeof(X86_GR16_AO_64_fp)/sizeof(unsigned));
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate SP or BP.
+ return array_endof(X86_GR16_AO_64) - 1;
else
- return X86_GR16_AO_64 + (sizeof(X86_GR16_AO_64) / sizeof(unsigned));
+ // If not, just don't allocate SP.
+ return array_endof(X86_GR16_AO_64);
} else {
- if (RI->hasFP(MF))
- return X86_GR16_AO_32_fp+(sizeof(X86_GR16_AO_32_fp)/sizeof(unsigned));
+ // Does the function dedicate EBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate SP or BP.
+ return begin() + 6;
else
- return X86_GR16_AO_32 + (sizeof(X86_GR16_AO_32) / sizeof(unsigned));
+ // If not, just don't allocate SP.
+ return begin() + 7;
}
}
}];
}
-
-def GR32 : RegisterClass<"X86", [i32], 32,
+def GR32 : RegisterClass<"X86", [i32], 32,
[EAX, ECX, EDX, ESI, EDI, EBX, EBP, ESP,
R8D, R9D, R10D, R11D, R14D, R15D, R12D, R13D]> {
- let SubRegClassList = [GR8, GR16];
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi), (GR16 sub_16bit)];
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
- // Does the function dedicate RBP / EBP to being a frame ptr?
- // If so, don't allocate ESP or EBP.
- static const unsigned X86_GR32_AO_64_fp[] = {
- X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI,
- X86::R8D, X86::R9D, X86::R10D, X86::R11D,
- X86::EBX, X86::R14D, X86::R15D, X86::R12D, X86::R13D
- };
- static const unsigned X86_GR32_AO_32_fp[] = {
- X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI, X86::EBX
- };
- // If not, just don't allocate SPL.
static const unsigned X86_GR32_AO_64[] = {
X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI,
X86::R8D, X86::R9D, X86::R10D, X86::R11D,
X86::EBX, X86::R14D, X86::R15D, X86::R12D, X86::R13D, X86::EBP
};
- static const unsigned X86_GR32_AO_32[] = {
- X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI, X86::EBX, X86::EBP
- };
GR32Class::iterator
GR32Class::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
- if (Subtarget.is64Bit()) {
- if (RI->hasFP(MF))
- return X86_GR32_AO_64_fp;
- else
- return X86_GR32_AO_64;
- } else {
- if (RI->hasFP(MF))
- return X86_GR32_AO_32_fp;
- else
- return X86_GR32_AO_32;
- }
+ if (Subtarget.is64Bit())
+ return X86_GR32_AO_64;
+ else
+ return begin();
}
GR32Class::iterator
GR32Class::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
if (Subtarget.is64Bit()) {
- if (RI->hasFP(MF))
- return X86_GR32_AO_64_fp+(sizeof(X86_GR32_AO_64_fp)/sizeof(unsigned));
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate ESP or EBP.
+ return array_endof(X86_GR32_AO_64) - 1;
else
- return X86_GR32_AO_64 + (sizeof(X86_GR32_AO_64) / sizeof(unsigned));
+ // If not, just don't allocate ESP.
+ return array_endof(X86_GR32_AO_64);
} else {
- if (RI->hasFP(MF))
- return X86_GR32_AO_32_fp+(sizeof(X86_GR32_AO_32_fp)/sizeof(unsigned));
+ // Does the function dedicate EBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate ESP or EBP.
+ return begin() + 6;
else
- return X86_GR32_AO_32 + (sizeof(X86_GR32_AO_32) / sizeof(unsigned));
+ // If not, just don't allocate ESP.
+ return begin() + 7;
}
}
}];
}
-
-def GR64 : RegisterClass<"X86", [i64], 64,
+// GR64 - 64-bit GPRs. This oddly includes RIP, which isn't accurate, since
+// RIP isn't really a register and it can't be used anywhere except in an
+// address, but it doesn't cause trouble.
+def GR64 : RegisterClass<"X86", [i64], 64,
[RAX, RCX, RDX, RSI, RDI, R8, R9, R10, R11,
- RBX, R14, R15, R12, R13, RBP, RSP]> {
- let SubRegClassList = [GR8, GR16, GR32];
+ RBX, R14, R15, R12, R13, RBP, RSP, RIP]> {
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi),
+ (GR16 sub_16bit),
+ (GR32 sub_32bit)];
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
GR64Class::iterator
GR64Class::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
- const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
if (!Subtarget.is64Bit())
return begin(); // None of these are allocatable in 32-bit.
- if (RI->hasFP(MF)) // Does the function dedicate RBP to being a frame ptr?
- return end()-2; // If so, don't allocate RSP or RBP
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ return end()-3; // If so, don't allocate RIP, RSP or RBP
else
- return end()-1; // If not, just don't allocate RSP
+ return end()-2; // If not, just don't allocate RIP or RSP
}
}];
}
+// Segment registers for use by MOV instructions (and others) that have a
+// segment register as one operand. Always contain a 16-bit segment
+// descriptor.
+def SEGMENT_REG : RegisterClass<"X86", [i16], 16, [CS, DS, SS, ES, FS, GS]>;
+
+// Debug registers.
+def DEBUG_REG : RegisterClass<"X86", [i32], 32,
+ [DR0, DR1, DR2, DR3, DR4, DR5, DR6, DR7]>;
+
+// Control registers.
+def CONTROL_REG : RegisterClass<"X86", [i64], 64,
+ [CR0, CR1, CR2, CR3, CR4, CR5, CR6, CR7, CR8,
+ CR9, CR10, CR11, CR12, CR13, CR14, CR15]>;
+
+// GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD, GR32_ABCD, GR64_ABCD - Subclasses of
+// GR8, GR16, GR32, and GR64 which contain just the "a" "b", "c", and "d"
+// registers. On x86-32, GR16_ABCD and GR32_ABCD are classes for registers
+// that support 8-bit subreg operations. On x86-64, GR16_ABCD, GR32_ABCD,
+// and GR64_ABCD are classes for registers that support 8-bit h-register
+// operations.
+def GR8_ABCD_L : RegisterClass<"X86", [i8], 8, [AL, CL, DL, BL]>;
+def GR8_ABCD_H : RegisterClass<"X86", [i8], 8, [AH, CH, DH, BH]>;
+def GR16_ABCD : RegisterClass<"X86", [i16], 16, [AX, CX, DX, BX]> {
+ let SubRegClasses = [(GR8_ABCD_L sub_8bit), (GR8_ABCD_H sub_8bit_hi)];
+}
+def GR32_ABCD : RegisterClass<"X86", [i32], 32, [EAX, ECX, EDX, EBX]> {
+ let SubRegClasses = [(GR8_ABCD_L sub_8bit),
+ (GR8_ABCD_H sub_8bit_hi),
+ (GR16_ABCD sub_16bit)];
+}
+def GR64_ABCD : RegisterClass<"X86", [i64], 64, [RAX, RCX, RDX, RBX]> {
+ let SubRegClasses = [(GR8_ABCD_L sub_8bit),
+ (GR8_ABCD_H sub_8bit_hi),
+ (GR16_ABCD sub_16bit),
+ (GR32_ABCD sub_32bit)];
+}
+def GR32_TC : RegisterClass<"X86", [i32], 32, [EAX, ECX, EDX]> {
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi), (GR16 sub_16bit)];
+}
+def GR64_TC : RegisterClass<"X86", [i64], 64, [RAX, RCX, RDX, RSI, RDI,
+ R8, R9, R11]> {
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi),
+ (GR16 sub_16bit),
+ (GR32_TC sub_32bit)];
+}
-// GR16, GR32 subclasses which contain registers that have GR8 sub-registers.
-// These should only be used for 32-bit mode.
-def GR16_ : RegisterClass<"X86", [i16], 16, [AX, CX, DX, BX]> {
- let SubRegClassList = [GR8];
+// GR8_NOREX - GR8 registers which do not require a REX prefix.
+def GR8_NOREX : RegisterClass<"X86", [i8], 8,
+ [AL, CL, DL, AH, CH, DH, BL, BH]> {
+ let MethodProtos = [{
+ iterator allocation_order_begin(const MachineFunction &MF) const;
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ // In 64-bit mode, it's not safe to blindly allocate H registers.
+ static const unsigned X86_GR8_NOREX_AO_64[] = {
+ X86::AL, X86::CL, X86::DL, X86::BL
+ };
+
+ GR8_NOREXClass::iterator
+ GR8_NOREXClass::allocation_order_begin(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ if (Subtarget.is64Bit())
+ return X86_GR8_NOREX_AO_64;
+ else
+ return begin();
+ }
+
+ GR8_NOREXClass::iterator
+ GR8_NOREXClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ if (Subtarget.is64Bit())
+ return array_endof(X86_GR8_NOREX_AO_64);
+ else
+ return end();
+ }
+ }];
}
-def GR32_ : RegisterClass<"X86", [i32], 32, [EAX, ECX, EDX, EBX]> {
- let SubRegClassList = [GR8, GR16];
+// GR16_NOREX - GR16 registers which do not require a REX prefix.
+def GR16_NOREX : RegisterClass<"X86", [i16], 16,
+ [AX, CX, DX, SI, DI, BX, BP, SP]> {
+ let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi)];
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ GR16_NOREXClass::iterator
+ GR16_NOREXClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ // Does the function dedicate RBP / EBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate SP or BP.
+ return end() - 2;
+ else
+ // If not, just don't allocate SP.
+ return end() - 1;
+ }
+ }];
+}
+// GR32_NOREX - GR32 registers which do not require a REX prefix.
+def GR32_NOREX : RegisterClass<"X86", [i32], 32,
+ [EAX, ECX, EDX, ESI, EDI, EBX, EBP, ESP]> {
+ let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
+ (GR16_NOREX sub_16bit)];
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ GR32_NOREXClass::iterator
+ GR32_NOREXClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ // Does the function dedicate RBP / EBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate ESP or EBP.
+ return end() - 2;
+ else
+ // If not, just don't allocate ESP.
+ return end() - 1;
+ }
+ }];
+}
+// GR64_NOREX - GR64 registers which do not require a REX prefix.
+def GR64_NOREX : RegisterClass<"X86", [i64], 64,
+ [RAX, RCX, RDX, RSI, RDI, RBX, RBP, RSP, RIP]> {
+ let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
+ (GR16_NOREX sub_16bit),
+ (GR32_NOREX sub_32bit)];
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ GR64_NOREXClass::iterator
+ GR64_NOREXClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate RIP, RSP or RBP.
+ return end() - 3;
+ else
+ // If not, just don't allocate RIP or RSP.
+ return end() - 2;
+ }
+ }];
+}
+
+// GR32_NOSP - GR32 registers except ESP.
+def GR32_NOSP : RegisterClass<"X86", [i32], 32,
+ [EAX, ECX, EDX, ESI, EDI, EBX, EBP,
+ R8D, R9D, R10D, R11D, R14D, R15D, R12D, R13D]> {
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi), (GR16 sub_16bit)];
+ let MethodProtos = [{
+ iterator allocation_order_begin(const MachineFunction &MF) const;
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ static const unsigned X86_GR32_NOSP_AO_64[] = {
+ X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI,
+ X86::R8D, X86::R9D, X86::R10D, X86::R11D,
+ X86::EBX, X86::R14D, X86::R15D, X86::R12D, X86::R13D, X86::EBP
+ };
+
+ GR32_NOSPClass::iterator
+ GR32_NOSPClass::allocation_order_begin(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ if (Subtarget.is64Bit())
+ return X86_GR32_NOSP_AO_64;
+ else
+ return begin();
+ }
+
+ GR32_NOSPClass::iterator
+ GR32_NOSPClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ if (Subtarget.is64Bit()) {
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate EBP.
+ return array_endof(X86_GR32_NOSP_AO_64) - 1;
+ else
+ // If not, any reg in this class is ok.
+ return array_endof(X86_GR32_NOSP_AO_64);
+ } else {
+ // Does the function dedicate EBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate EBP.
+ return begin() + 6;
+ else
+ // If not, any reg in this class is ok.
+ return begin() + 7;
+ }
+ }
+ }];
+}
+
+// GR64_NOSP - GR64 registers except RSP (and RIP).
+def GR64_NOSP : RegisterClass<"X86", [i64], 64,
+ [RAX, RCX, RDX, RSI, RDI, R8, R9, R10, R11,
+ RBX, R14, R15, R12, R13, RBP]> {
+ let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi),
+ (GR16 sub_16bit),
+ (GR32_NOSP sub_32bit)];
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ GR64_NOSPClass::iterator
+ GR64_NOSPClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ if (!Subtarget.is64Bit())
+ return begin(); // None of these are allocatable in 32-bit.
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ return end()-1; // If so, don't allocate RBP
+ else
+ return end(); // If not, any reg in this class is ok.
+ }
+ }];
+}
+
+// GR64_NOREX_NOSP - GR64_NOREX registers except RSP.
+def GR64_NOREX_NOSP : RegisterClass<"X86", [i64], 64,
+ [RAX, RCX, RDX, RSI, RDI, RBX, RBP]> {
+ let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
+ (GR16_NOREX sub_16bit),
+ (GR32_NOREX sub_32bit)];
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ GR64_NOREX_NOSPClass::iterator
+ GR64_NOREX_NOSPClass::allocation_order_end(const MachineFunction &MF) const
+ {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
+ // Does the function dedicate RBP to being a frame ptr?
+ if (TFI->hasFP(MF) || MFI->getReserveFP())
+ // If so, don't allocate RBP.
+ return end() - 1;
+ else
+ // If not, any reg in this class is ok.
+ return end();
+ }
+ }];
}
// A class to support the 'A' assembler constraint: EAX then EDX.
-def GRAD : RegisterClass<"X86", [i32], 32, [EAX, EDX]>;
+def GR32_AD : RegisterClass<"X86", [i32], 32, [EAX, EDX]> {
+ let SubRegClasses = [(GR8_ABCD_L sub_8bit),
+ (GR8_ABCD_H sub_8bit_hi),
+ (GR16_ABCD sub_16bit)];
+}
// Scalar SSE2 floating point registers.
def FR32 : RegisterClass<"X86", [f32], 32,
}
// Generic vector registers: VR64 and VR128.
-def VR64 : RegisterClass<"X86", [v8i8, v4i16, v2i32, v1i64, v2f32], 64,
+def VR64: RegisterClass<"X86", [x86mmx], 64,
[MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7]>;
def VR128 : RegisterClass<"X86", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],128,
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11,
XMM12, XMM13, XMM14, XMM15]> {
+ let SubRegClasses = [(FR32 sub_ss), (FR64 sub_sd)];
+
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
}];
}
+def VR256 : RegisterClass<"X86", [v32i8, v8i32, v4i64, v8f32, v4f64], 256,
+ [YMM0, YMM1, YMM2, YMM3, YMM4, YMM5, YMM6, YMM7,
+ YMM8, YMM9, YMM10, YMM11,
+ YMM12, YMM13, YMM14, YMM15]> {
+ let SubRegClasses = [(FR32 sub_ss), (FR64 sub_sd), (VR128 sub_xmm)];
+
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ VR256Class::iterator
+ VR256Class::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
+ if (!Subtarget.is64Bit())
+ return end()-8; // Only YMM0 to YMM7 are available in 32-bit mode.
+ else
+ return end();
+ }
+ }];
+}
+
// Status flags registers.
def CCR : RegisterClass<"X86", [i32], 32, [EFLAGS]> {
let CopyCost = -1; // Don't allow copying of status registers.
+
+ // EFLAGS is not allocatable.
+ let MethodProtos = [{
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ CCRClass::iterator
+ CCRClass::allocation_order_end(const MachineFunction &MF) const {
+ return allocation_order_begin(MF);
+ }
+ }];
}
projects / oota-llvm.git / blobdiff