6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-08-26 07:29:55 +00:00
Code Issues Projects Releases Wiki Activity
d456a47dd3
llvm-6502/lib/Target/X86/X86RegisterInfo.td
Jim Grosbach fa85eb6237 Fix PR6696 and PR6663 
When a frame pointer is not otherwise required, and dynamic stack alignment
is necessary solely due to the spilling of a register with larger alignment
requirements than the default stack alignment, the frame pointer can be both
used as a general purpose register and a frame pointer. That goes poorly, for
obvious reasons. This patch brings back a bit of old logic for identifying
the use of such registers and conservatively reserves the frame pointer
during register allocation in such cases.

For now, implement for X86 only since it's 32-bit linux which is hitting this,
and we want a targeted fix for 2.7. As a follow-on, this will be expanded
to handle other targets, as theoretically the problem could arise elsewhere
as well.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100559 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-06 20:26:37 +00:00

866 lines
36 KiB
TableGen
Raw Blame History

//===- X86RegisterInfo.td - Describe the X86 Register File --*- tablegen -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file describes the X86 Register file, defining the registers themselves,
// aliases between the registers, and the register classes built out of the
// registers.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Register definitions...
//
let Namespace = "X86" in {
// 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
// AL aliases AX if we tell it that AX aliased AL (for example).
// Dwarf numbering is different for 32-bit and 64-bit, and there are
// variations by target as well. Currently the first entry is for X86-64,
// second - for EH on X86-32/Darwin and third is 'generic' one (X86-32/Linux
// and debug information on X86-32/Darwin)
// 8-bit registers
// Low registers
def AL : Register<"al">, DwarfRegNum<[0, 0, 0]>;
def DL : Register<"dl">, DwarfRegNum<[1, 2, 2]>;
def CL : Register<"cl">, DwarfRegNum<[2, 1, 1]>;
def BL : Register<"bl">, DwarfRegNum<[3, 3, 3]>;
// X86-64 only
def SIL : Register<"sil">, DwarfRegNum<[4, 6, 6]>;
def DIL : Register<"dil">, DwarfRegNum<[5, 7, 7]>;
def BPL : Register<"bpl">, DwarfRegNum<[6, 4, 5]>;
def SPL : Register<"spl">, DwarfRegNum<[7, 5, 4]>;
def R8B : Register<"r8b">, DwarfRegNum<[8, -2, -2]>;
def R9B : Register<"r9b">, DwarfRegNum<[9, -2, -2]>;
def R10B : Register<"r10b">, DwarfRegNum<[10, -2, -2]>;
def R11B : Register<"r11b">, DwarfRegNum<[11, -2, -2]>;
def R12B : Register<"r12b">, DwarfRegNum<[12, -2, -2]>;
def R13B : Register<"r13b">, DwarfRegNum<[13, -2, -2]>;
def R14B : Register<"r14b">, DwarfRegNum<[14, -2, -2]>;
def R15B : Register<"r15b">, DwarfRegNum<[15, -2, -2]>;
// 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", [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]>;
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
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 R11W : RegisterWithSubRegs<"r11w", [R11B]>, DwarfRegNum<[11, -2, -2]>;
def R12W : RegisterWithSubRegs<"r12w", [R12B]>, DwarfRegNum<[12, -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
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 EBX : RegisterWithSubRegs<"ebx", [BX]>, DwarfRegNum<[3, 3, 3]>;
def ESI : RegisterWithSubRegs<"esi", [SI]>, DwarfRegNum<[4, 6, 6]>;
def EDI : RegisterWithSubRegs<"edi", [DI]>, DwarfRegNum<[5, 7, 7]>;
def EBP : RegisterWithSubRegs<"ebp", [BP]>, DwarfRegNum<[6, 4, 5]>;
def ESP : RegisterWithSubRegs<"esp", [SP]>, DwarfRegNum<[7, 5, 4]>;
def EIP : RegisterWithSubRegs<"eip", [IP]>, DwarfRegNum<[16, 8, 8]>;
// X86-64 only
def R8D : RegisterWithSubRegs<"r8d", [R8W]>, DwarfRegNum<[8, -2, -2]>;
def R9D : RegisterWithSubRegs<"r9d", [R9W]>, DwarfRegNum<[9, -2, -2]>;
def R10D : RegisterWithSubRegs<"r10d", [R10W]>, DwarfRegNum<[10, -2, -2]>;
def R11D : RegisterWithSubRegs<"r11d", [R11W]>, DwarfRegNum<[11, -2, -2]>;
def R12D : RegisterWithSubRegs<"r12d", [R12W]>, DwarfRegNum<[12, -2, -2]>;
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
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 RBX : RegisterWithSubRegs<"rbx", [EBX]>, DwarfRegNum<[3, -2, -2]>;
def RSI : RegisterWithSubRegs<"rsi", [ESI]>, DwarfRegNum<[4, -2, -2]>;
def RDI : RegisterWithSubRegs<"rdi", [EDI]>, DwarfRegNum<[5, -2, -2]>;
def RBP : RegisterWithSubRegs<"rbp", [EBP]>, DwarfRegNum<[6, -2, -2]>;
def RSP : RegisterWithSubRegs<"rsp", [ESP]>, DwarfRegNum<[7, -2, -2]>;
def R8 : RegisterWithSubRegs<"r8", [R8D]>, DwarfRegNum<[8, -2, -2]>;
def R9 : RegisterWithSubRegs<"r9", [R9D]>, DwarfRegNum<[9, -2, -2]>;
def R10 : RegisterWithSubRegs<"r10", [R10D]>, DwarfRegNum<[10, -2, -2]>;
def R11 : RegisterWithSubRegs<"r11", [R11D]>, DwarfRegNum<[11, -2, -2]>;
def R12 : RegisterWithSubRegs<"r12", [R12D]>, DwarfRegNum<[12, -2, -2]>;
def R13 : RegisterWithSubRegs<"r13", [R13D]>, DwarfRegNum<[13, -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 MM1 : Register<"mm1">, DwarfRegNum<[42, 30, 30]>;
def MM2 : Register<"mm2">, DwarfRegNum<[43, 31, 31]>;
def MM3 : Register<"mm3">, DwarfRegNum<[44, 32, 32]>;
def MM4 : Register<"mm4">, DwarfRegNum<[45, 33, 33]>;
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 FP2 : Register<"fp2">;
def FP3 : Register<"fp3">;
def FP4 : Register<"fp4">;
def FP5 : Register<"fp5">;
def FP6 : Register<"fp6">;
// XMM Registers, used by the various SSE instruction set extensions
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 XMM3: Register<"xmm3">, DwarfRegNum<[20, 24, 24]>;
def XMM4: Register<"xmm4">, DwarfRegNum<[21, 25, 25]>;
def XMM5: Register<"xmm5">, DwarfRegNum<[22, 26, 26]>;
def XMM6: Register<"xmm6">, DwarfRegNum<[23, 27, 27]>;
def XMM7: Register<"xmm7">, DwarfRegNum<[24, 28, 28]>;
// X86-64 only
def XMM8: Register<"xmm8">, DwarfRegNum<[25, -2, -2]>;
def XMM9: Register<"xmm9">, DwarfRegNum<[26, -2, -2]>;
def XMM10: Register<"xmm10">, DwarfRegNum<[27, -2, -2]>;
def XMM11: Register<"xmm11">, DwarfRegNum<[28, -2, -2]>;
def XMM12: Register<"xmm12">, DwarfRegNum<[29, -2, -2]>;
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
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]>;
def ST1 : Register<"st(1)">, DwarfRegNum<[34, 13, 12]>;
def ST2 : Register<"st(2)">, DwarfRegNum<[35, 14, 13]>;
def ST3 : Register<"st(3)">, DwarfRegNum<[36, 15, 14]>;
def ST4 : Register<"st(4)">, DwarfRegNum<[37, 16, 15]>;
def ST5 : Register<"st(5)">, DwarfRegNum<[38, 17, 16]>;
def ST6 : Register<"st(6)">, DwarfRegNum<[39, 18, 17]>;
def ST7 : Register<"st(7)">, DwarfRegNum<[40, 19, 18]>;
// Status flags register
def EFLAGS : Register<"flags">;
// 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">;
// Condition registers
def ECR0 : Register<"ecr0">;
def ECR1 : Register<"ecr1">;
def ECR2 : Register<"ecr2">;
def ECR3 : Register<"ecr3">;
def ECR4 : Register<"ecr4">;
def ECR5 : Register<"ecr5">;
def ECR6 : Register<"ecr6">;
def ECR7 : Register<"ecr7">;
def RCR0 : Register<"rcr0">;
def RCR1 : Register<"rcr1">;
def RCR2 : Register<"rcr2">;
def RCR3 : Register<"rcr3">;
def RCR4 : Register<"rcr4">;
def RCR5 : Register<"rcr5">;
def RCR6 : Register<"rcr6">;
def RCR7 : Register<"rcr7">;
def RCR8 : Register<"rcr8">;
}
//===----------------------------------------------------------------------===//
// Subregister Set Definitions... now that we have all of the pieces, define the
// sub registers for each register.
//
def x86_subreg_8bit : PatLeaf<(i32 1)>;
def x86_subreg_8bit_hi : PatLeaf<(i32 2)>;
def x86_subreg_16bit : PatLeaf<(i32 3)>;
def x86_subreg_32bit : PatLeaf<(i32 4)>;
def x86_subreg_ss : PatLeaf<(i32 1)>;
def x86_subreg_sd : PatLeaf<(i32 2)>;
def x86_subreg_xmm : 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]>;
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],
[AH, CH, DH, BH]>;
def : SubRegSet<3, [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],
[AH, CH, DH, BH]>;
def : SubRegSet<3, [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<4, [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]>;
def : SubRegSet<1, [YMM0, YMM1, YMM2, YMM3, YMM4, YMM5, YMM6, YMM7,
YMM8, YMM9, YMM10, YMM11, YMM12, YMM13, YMM14, YMM15],
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15]>;
def : SubRegSet<2, [YMM0, YMM1, YMM2, YMM3, YMM4, YMM5, YMM6, YMM7,
YMM8, YMM9, YMM10, YMM11, YMM12, YMM13, YMM14, YMM15],
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15]>;
def : SubRegSet<3, [YMM0, YMM1, YMM2, YMM3, YMM4, YMM5, YMM6, YMM7,
YMM8, YMM9, YMM10, YMM11, YMM12, YMM13, YMM14, YMM15],
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15]>;
def : SubRegSet<1, [XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15],
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15]>;
def : SubRegSet<2, [XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15],
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15]>;
//===----------------------------------------------------------------------===//
// Register Class Definitions... now that we have all of the pieces, define the
// top-level register classes. The order specified in the register list is
// implicitly defined to be the register allocation order.
//
// List call-clobbered registers before callee-save registers. RBX, RBP, (and
// R12, R13, R14, and R15 for X86-64) are callee-save registers.
// In 64-mode, there are 12 additional i8 registers, SIL, DIL, BPL, SPL, and
// 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 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, 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 = [{
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
};
GR8Class::iterator
GR8Class::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
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 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())
// In 32-mode, none of the 8-bit registers aliases EBP or ESP.
return begin() + 8;
else if (RI->hasFP(MF) || MFI->getReserveFP())
// If so, don't allocate SPL or BPL.
return array_endof(X86_GR8_AO_64) - 1;
else
// 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, GR8];
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
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
};
GR16Class::iterator
GR16Class::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
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 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 (RI->hasFP(MF) || MFI->getReserveFP())
// If so, don't allocate SP or BP.
return array_endof(X86_GR16_AO_64) - 1;
else
// If not, just don't allocate SP.
return array_endof(X86_GR16_AO_64);
} else {
// Does the function dedicate EBP to being a frame ptr?
if (RI->hasFP(MF) || MFI->getReserveFP())
// If so, don't allocate SP or BP.
return begin() + 6;
else
// If not, just don't allocate SP.
return begin() + 7;
}
}
}];
}
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, GR8, GR16];
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_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
};
GR32Class::iterator
GR32Class::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
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 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 (RI->hasFP(MF) || MFI->getReserveFP())
// If so, don't allocate ESP or EBP.
return array_endof(X86_GR32_AO_64) - 1;
else
// If not, just don't allocate ESP.
return array_endof(X86_GR32_AO_64);
} else {
// Does the function dedicate EBP to being a frame ptr?
if (RI->hasFP(MF) || MFI->getReserveFP())
// If so, don't allocate ESP or EBP.
return begin() + 6;
else
// If not, just don't allocate ESP.
return begin() + 7;
}
}
}];
}
// 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, RIP]> {
let SubRegClassList = [GR8, GR8, GR16, GR32];
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
GR64Class::iterator
GR64Class::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const TargetRegisterInfo *RI = TM.getRegisterInfo();
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 (RI->hasFP(MF) || MFI->getReserveFP())
return end()-3; // If so, don't allocate RIP, RSP or RBP
else
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_32 : RegisterClass<"X86", [i32], 32,
[ECR0, ECR1, ECR2, ECR3, ECR4, ECR5, ECR6,
ECR7]> {
}
def CONTROL_REG_64 : RegisterClass<"X86", [i64], 64,
[RCR0, RCR1, RCR2, RCR3, RCR4, RCR5, RCR6,
RCR7, RCR8]> {
}
// 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 SubRegClassList = [GR8_ABCD_L, GR8_ABCD_H];
}
def GR32_ABCD : RegisterClass<"X86", [i32], 32, [EAX, ECX, EDX, EBX]> {
let SubRegClassList = [GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD];
}
def GR64_ABCD : RegisterClass<"X86", [i64], 64, [RAX, RCX, RDX, RBX]> {
let SubRegClassList = [GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD, GR32_ABCD];
}
def GR32_TC : RegisterClass<"X86", [i32], 32, [EAX, ECX, EDX]> {
let SubRegClassList = [GR8, GR8, GR16];
}
def GR64_TC : RegisterClass<"X86", [i64], 64, [RAX, RCX, RDX, RSI, RDI,
R8, R9, R11]> {
let SubRegClassList = [GR8, GR8, GR16, GR32_TC];
}
// 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();
}
}];
}
// 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 SubRegClassList = [GR8_NOREX, GR8_NOREX];
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 TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
// Does the function dedicate RBP / EBP to being a frame ptr?
if (RI->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 SubRegClassList = [GR8_NOREX, GR8_NOREX, GR16_NOREX];
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 TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
// Does the function dedicate RBP / EBP to being a frame ptr?
if (RI->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 SubRegClassList = [GR8_NOREX, GR8_NOREX, GR16_NOREX, GR32_NOREX];
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 TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
// Does the function dedicate RBP to being a frame ptr?
if (RI->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 SubRegClassList = [GR8, GR8, GR16];
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 TargetRegisterInfo *RI = TM.getRegisterInfo();
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 (RI->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 (RI->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 SubRegClassList = [GR8, GR8, GR16, GR32_NOSP];
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 TargetRegisterInfo *RI = TM.getRegisterInfo();
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 (RI->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 SubRegClassList = [GR8_NOREX, GR8_NOREX, GR16_NOREX, GR32_NOREX];
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 TargetRegisterInfo *RI = TM.getRegisterInfo();
const X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
// Does the function dedicate RBP to being a frame ptr?
if (RI->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 GR32_AD : RegisterClass<"X86", [i32], 32, [EAX, EDX]> {
let SubRegClassList = [GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD];
}
// Scalar SSE2 floating point registers.
def FR32 : RegisterClass<"X86", [f32], 32,
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11,
XMM12, XMM13, XMM14, XMM15]> {
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
FR32Class::iterator
FR32Class::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 XMM0 to XMM7 are available in 32-bit mode.
else
return end();
}
}];
}
def FR64 : RegisterClass<"X86", [f64], 64,
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11,
XMM12, XMM13, XMM14, XMM15]> {
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
FR64Class::iterator
FR64Class::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 XMM0 to XMM7 are available in 32-bit mode.
else
return end();
}
}];
}
// FIXME: This sets up the floating point register files as though they are f64
// values, though they really are f80 values. This will cause us to spill
// values as 64-bit quantities instead of 80-bit quantities, which is much much
// faster on common hardware. In reality, this should be controlled by a
// command line option or something.
def RFP32 : RegisterClass<"X86",[f32], 32, [FP0, FP1, FP2, FP3, FP4, FP5, FP6]>;
def RFP64 : RegisterClass<"X86",[f64], 32, [FP0, FP1, FP2, FP3, FP4, FP5, FP6]>;
def RFP80 : RegisterClass<"X86",[f80], 32, [FP0, FP1, FP2, FP3, FP4, FP5, FP6]>;
// Floating point stack registers (these are not allocatable by the
// register allocator - the floating point stackifier is responsible
// for transforming FPn allocations to STn registers)
def RST : RegisterClass<"X86", [f80, f64, f32], 32,
[ST0, ST1, ST2, ST3, ST4, ST5, ST6, ST7]> {
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
RSTClass::iterator
RSTClass::allocation_order_end(const MachineFunction &MF) const {
return begin();
}
}];
}
// Generic vector registers: VR64 and VR128.
def VR64 : RegisterClass<"X86", [v8i8, v4i16, v2i32, v1i64, v2f32], 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 SubRegClassList = [FR32, FR64];
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
VR128Class::iterator
VR128Class::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 XMM0 to XMM7 are available in 32-bit mode.
else
return end();
}
}];
}
def VR256 : RegisterClass<"X86", [ v8i32, v4i64, v8f32, v4f64],256,
[YMM0, YMM1, YMM2, YMM3, YMM4, YMM5, YMM6, YMM7,
YMM8, YMM9, YMM10, YMM11,
YMM12, YMM13, YMM14, YMM15]> {
let SubRegClassList = [FR32, FR64, VR128];
}
// Status flags registers.
def CCR : RegisterClass<"X86", [i32], 32, [EFLAGS]> {
let CopyCost = -1; // Don't allow copying of status registers.
}
Reference in New Issue View Git Blame Copy Permalink