| //===-- X86InstrControl.td - Control Flow Instructions -----*- tablegen -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file describes the X86 jump, return, call, and related instructions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Control Flow Instructions. |
| // |
| |
| // Return instructions. |
| // |
| // The X86retflag return instructions are variadic because we may add ST0 and |
| // ST1 arguments when returning values on the x87 stack. |
| let isTerminator = 1, isReturn = 1, isBarrier = 1, |
| hasCtrlDep = 1, FPForm = SpecialFP, SchedRW = [WriteJumpLd] in { |
| def RETL : I <0xC3, RawFrm, (outs), (ins variable_ops), |
| "ret{l}", []>, OpSize32, Requires<[Not64BitMode]>; |
| def RETQ : I <0xC3, RawFrm, (outs), (ins variable_ops), |
| "ret{q}", []>, OpSize32, Requires<[In64BitMode]>; |
| def RETW : I <0xC3, RawFrm, (outs), (ins), |
| "ret{w}", []>, OpSize16; |
| def RETIL : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt, variable_ops), |
| "ret{l}\t$amt", []>, OpSize32, Requires<[Not64BitMode]>; |
| def RETIQ : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt, variable_ops), |
| "ret{q}\t$amt", []>, OpSize32, Requires<[In64BitMode]>; |
| def RETIW : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt), |
| "ret{w}\t$amt", []>, OpSize16; |
| def LRETL : I <0xCB, RawFrm, (outs), (ins), |
| "{l}ret{l|f}", []>, OpSize32; |
| def LRETQ : RI <0xCB, RawFrm, (outs), (ins), |
| "{l}ret{|f}q", []>, Requires<[In64BitMode]>; |
| def LRETW : I <0xCB, RawFrm, (outs), (ins), |
| "{l}ret{w|f}", []>, OpSize16; |
| def LRETIL : Ii16<0xCA, RawFrm, (outs), (ins i16imm:$amt), |
| "{l}ret{l|f}\t$amt", []>, OpSize32; |
| def LRETIQ : RIi16<0xCA, RawFrm, (outs), (ins i16imm:$amt), |
| "{l}ret{|f}q\t$amt", []>, Requires<[In64BitMode]>; |
| def LRETIW : Ii16<0xCA, RawFrm, (outs), (ins i16imm:$amt), |
| "{l}ret{w|f}\t$amt", []>, OpSize16; |
| |
| // The machine return from interrupt instruction, but sometimes we need to |
| // perform a post-epilogue stack adjustment. Codegen emits the pseudo form |
| // which expands to include an SP adjustment if necessary. |
| def IRET16 : I <0xcf, RawFrm, (outs), (ins), "iret{w}", []>, |
| OpSize16; |
| def IRET32 : I <0xcf, RawFrm, (outs), (ins), "iret{l|d}", []>, OpSize32; |
| def IRET64 : RI <0xcf, RawFrm, (outs), (ins), "iretq", []>, Requires<[In64BitMode]>; |
| let isCodeGenOnly = 1 in |
| def IRET : PseudoI<(outs), (ins i32imm:$adj), [(X86iret timm:$adj)]>; |
| def RET : PseudoI<(outs), (ins i32imm:$adj, variable_ops), [(X86retflag timm:$adj)]>; |
| } |
| |
| // Unconditional branches. |
| let isBarrier = 1, isBranch = 1, isTerminator = 1, SchedRW = [WriteJump] in { |
| def JMP_1 : Ii8PCRel<0xEB, RawFrm, (outs), (ins brtarget8:$dst), |
| "jmp\t$dst", [(br bb:$dst)]>; |
| let hasSideEffects = 0, isCodeGenOnly = 1, ForceDisassemble = 1 in { |
| def JMP_2 : Ii16PCRel<0xE9, RawFrm, (outs), (ins brtarget16:$dst), |
| "jmp\t$dst", []>, OpSize16; |
| def JMP_4 : Ii32PCRel<0xE9, RawFrm, (outs), (ins brtarget32:$dst), |
| "jmp\t$dst", []>, OpSize32; |
| } |
| } |
| |
| // Conditional Branches. |
| let isBranch = 1, isTerminator = 1, Uses = [EFLAGS], SchedRW = [WriteJump], |
| isCodeGenOnly = 1, ForceDisassemble = 1 in { |
| def JCC_1 : Ii8PCRel <0x70, AddCCFrm, (outs), |
| (ins brtarget8:$dst, ccode:$cond), |
| "j${cond}\t$dst", |
| [(X86brcond bb:$dst, timm:$cond, EFLAGS)]>; |
| let hasSideEffects = 0 in { |
| def JCC_2 : Ii16PCRel<0x80, AddCCFrm, (outs), |
| (ins brtarget16:$dst, ccode:$cond), |
| "j${cond}\t$dst", |
| []>, OpSize16, TB; |
| def JCC_4 : Ii32PCRel<0x80, AddCCFrm, (outs), |
| (ins brtarget32:$dst, ccode:$cond), |
| "j${cond}\t$dst", |
| []>, TB, OpSize32; |
| } |
| } |
| |
| def : InstAlias<"jo\t$dst", (JCC_1 brtarget8:$dst, 0), 0>; |
| def : InstAlias<"jno\t$dst", (JCC_1 brtarget8:$dst, 1), 0>; |
| def : InstAlias<"jb\t$dst", (JCC_1 brtarget8:$dst, 2), 0>; |
| def : InstAlias<"jae\t$dst", (JCC_1 brtarget8:$dst, 3), 0>; |
| def : InstAlias<"je\t$dst", (JCC_1 brtarget8:$dst, 4), 0>; |
| def : InstAlias<"jne\t$dst", (JCC_1 brtarget8:$dst, 5), 0>; |
| def : InstAlias<"jbe\t$dst", (JCC_1 brtarget8:$dst, 6), 0>; |
| def : InstAlias<"ja\t$dst", (JCC_1 brtarget8:$dst, 7), 0>; |
| def : InstAlias<"js\t$dst", (JCC_1 brtarget8:$dst, 8), 0>; |
| def : InstAlias<"jns\t$dst", (JCC_1 brtarget8:$dst, 9), 0>; |
| def : InstAlias<"jp\t$dst", (JCC_1 brtarget8:$dst, 10), 0>; |
| def : InstAlias<"jnp\t$dst", (JCC_1 brtarget8:$dst, 11), 0>; |
| def : InstAlias<"jl\t$dst", (JCC_1 brtarget8:$dst, 12), 0>; |
| def : InstAlias<"jge\t$dst", (JCC_1 brtarget8:$dst, 13), 0>; |
| def : InstAlias<"jle\t$dst", (JCC_1 brtarget8:$dst, 14), 0>; |
| def : InstAlias<"jg\t$dst", (JCC_1 brtarget8:$dst, 15), 0>; |
| |
| // jcx/jecx/jrcx instructions. |
| let isBranch = 1, isTerminator = 1, hasSideEffects = 0, SchedRW = [WriteJump] in { |
| // These are the 32-bit versions of this instruction for the asmparser. In |
| // 32-bit mode, the address size prefix is jcxz and the unprefixed version is |
| // jecxz. |
| let Uses = [CX] in |
| def JCXZ : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst), |
| "jcxz\t$dst", []>, AdSize16, Requires<[Not64BitMode]>; |
| let Uses = [ECX] in |
| def JECXZ : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst), |
| "jecxz\t$dst", []>, AdSize32; |
| |
| let Uses = [RCX] in |
| def JRCXZ : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst), |
| "jrcxz\t$dst", []>, AdSize64, Requires<[In64BitMode]>; |
| } |
| |
| // Indirect branches |
| let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in { |
| def JMP16r : I<0xFF, MRM4r, (outs), (ins GR16:$dst), "jmp{w}\t{*}$dst", |
| [(brind GR16:$dst)]>, Requires<[Not64BitMode]>, |
| OpSize16, Sched<[WriteJump]>; |
| def JMP16m : I<0xFF, MRM4m, (outs), (ins i16mem:$dst), "jmp{w}\t{*}$dst", |
| [(brind (loadi16 addr:$dst))]>, Requires<[Not64BitMode]>, |
| OpSize16, Sched<[WriteJumpLd]>; |
| |
| def JMP32r : I<0xFF, MRM4r, (outs), (ins GR32:$dst), "jmp{l}\t{*}$dst", |
| [(brind GR32:$dst)]>, Requires<[Not64BitMode]>, |
| OpSize32, Sched<[WriteJump]>; |
| def JMP32m : I<0xFF, MRM4m, (outs), (ins i32mem:$dst), "jmp{l}\t{*}$dst", |
| [(brind (loadi32 addr:$dst))]>, Requires<[Not64BitMode]>, |
| OpSize32, Sched<[WriteJumpLd]>; |
| |
| def JMP64r : I<0xFF, MRM4r, (outs), (ins GR64:$dst), "jmp{q}\t{*}$dst", |
| [(brind GR64:$dst)]>, Requires<[In64BitMode]>, |
| Sched<[WriteJump]>; |
| def JMP64m : I<0xFF, MRM4m, (outs), (ins i64mem:$dst), "jmp{q}\t{*}$dst", |
| [(brind (loadi64 addr:$dst))]>, Requires<[In64BitMode]>, |
| Sched<[WriteJumpLd]>; |
| |
| // Win64 wants indirect jumps leaving the function to have a REX_W prefix. |
| // These are switched from TAILJMPr/m64_REX in MCInstLower. |
| let isCodeGenOnly = 1, hasREX_WPrefix = 1 in { |
| def JMP64r_REX : I<0xFF, MRM4r, (outs), (ins GR64:$dst), |
| "rex64 jmp{q}\t{*}$dst", []>, Sched<[WriteJump]>; |
| let mayLoad = 1 in |
| def JMP64m_REX : I<0xFF, MRM4m, (outs), (ins i64mem:$dst), |
| "rex64 jmp{q}\t{*}$dst", []>, Sched<[WriteJumpLd]>; |
| |
| } |
| |
| // Non-tracking jumps for IBT, use with caution. |
| let isCodeGenOnly = 1 in { |
| def JMP16r_NT : I<0xFF, MRM4r, (outs), (ins GR16 : $dst), "jmp{w}\t{*}$dst", |
| [(X86NoTrackBrind GR16 : $dst)]>, Requires<[Not64BitMode]>, |
| OpSize16, Sched<[WriteJump]>, NOTRACK; |
| |
| def JMP16m_NT : I<0xFF, MRM4m, (outs), (ins i16mem : $dst), "jmp{w}\t{*}$dst", |
| [(X86NoTrackBrind (loadi16 addr : $dst))]>, |
| Requires<[Not64BitMode]>, OpSize16, Sched<[WriteJumpLd]>, |
| NOTRACK; |
| |
| def JMP32r_NT : I<0xFF, MRM4r, (outs), (ins GR32 : $dst), "jmp{l}\t{*}$dst", |
| [(X86NoTrackBrind GR32 : $dst)]>, Requires<[Not64BitMode]>, |
| OpSize32, Sched<[WriteJump]>, NOTRACK; |
| def JMP32m_NT : I<0xFF, MRM4m, (outs), (ins i32mem : $dst), "jmp{l}\t{*}$dst", |
| [(X86NoTrackBrind (loadi32 addr : $dst))]>, |
| Requires<[Not64BitMode]>, OpSize32, Sched<[WriteJumpLd]>, |
| NOTRACK; |
| |
| def JMP64r_NT : I<0xFF, MRM4r, (outs), (ins GR64 : $dst), "jmp{q}\t{*}$dst", |
| [(X86NoTrackBrind GR64 : $dst)]>, Requires<[In64BitMode]>, |
| Sched<[WriteJump]>, NOTRACK; |
| def JMP64m_NT : I<0xFF, MRM4m, (outs), (ins i64mem : $dst), "jmp{q}\t{*}$dst", |
| [(X86NoTrackBrind(loadi64 addr : $dst))]>, |
| Requires<[In64BitMode]>, Sched<[WriteJumpLd]>, NOTRACK; |
| } |
| |
| let Predicates = [Not64BitMode], AsmVariantName = "att" in { |
| def FARJMP16i : Iseg16<0xEA, RawFrmImm16, (outs), |
| (ins i16imm:$off, i16imm:$seg), |
| "ljmp{w}\t$seg, $off", []>, |
| OpSize16, Sched<[WriteJump]>; |
| def FARJMP32i : Iseg32<0xEA, RawFrmImm16, (outs), |
| (ins i32imm:$off, i16imm:$seg), |
| "ljmp{l}\t$seg, $off", []>, |
| OpSize32, Sched<[WriteJump]>; |
| } |
| def FARJMP64 : RI<0xFF, MRM5m, (outs), (ins opaquemem:$dst), |
| "ljmp{q}\t{*}$dst", []>, Sched<[WriteJump]>, Requires<[In64BitMode]>; |
| |
| let AsmVariantName = "att" in |
| def FARJMP16m : I<0xFF, MRM5m, (outs), (ins opaquemem:$dst), |
| "ljmp{w}\t{*}$dst", []>, OpSize16, Sched<[WriteJumpLd]>; |
| def FARJMP32m : I<0xFF, MRM5m, (outs), (ins opaquemem:$dst), |
| "{l}jmp{l}\t{*}$dst", []>, OpSize32, Sched<[WriteJumpLd]>; |
| } |
| |
| // Loop instructions |
| let SchedRW = [WriteJump] in { |
| def LOOP : Ii8PCRel<0xE2, RawFrm, (outs), (ins brtarget8:$dst), "loop\t$dst", []>; |
| def LOOPE : Ii8PCRel<0xE1, RawFrm, (outs), (ins brtarget8:$dst), "loope\t$dst", []>; |
| def LOOPNE : Ii8PCRel<0xE0, RawFrm, (outs), (ins brtarget8:$dst), "loopne\t$dst", []>; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Call Instructions... |
| // |
| let isCall = 1 in |
| // All calls clobber the non-callee saved registers. ESP is marked as |
| // a use to prevent stack-pointer assignments that appear immediately |
| // before calls from potentially appearing dead. Uses for argument |
| // registers are added manually. |
| let Uses = [ESP, SSP] in { |
| def CALLpcrel32 : Ii32PCRel<0xE8, RawFrm, |
| (outs), (ins i32imm_brtarget:$dst), |
| "call{l}\t$dst", []>, OpSize32, |
| Requires<[Not64BitMode]>, Sched<[WriteJump]>; |
| let hasSideEffects = 0 in |
| def CALLpcrel16 : Ii16PCRel<0xE8, RawFrm, |
| (outs), (ins i16imm_brtarget:$dst), |
| "call{w}\t$dst", []>, OpSize16, |
| Sched<[WriteJump]>; |
| def CALL16r : I<0xFF, MRM2r, (outs), (ins GR16:$dst), |
| "call{w}\t{*}$dst", [(X86call GR16:$dst)]>, |
| OpSize16, Requires<[Not64BitMode]>, Sched<[WriteJump]>; |
| def CALL16m : I<0xFF, MRM2m, (outs), (ins i16mem:$dst), |
| "call{w}\t{*}$dst", [(X86call (loadi16 addr:$dst))]>, |
| OpSize16, Requires<[Not64BitMode,FavorMemIndirectCall]>, |
| Sched<[WriteJumpLd]>; |
| def CALL32r : I<0xFF, MRM2r, (outs), (ins GR32:$dst), |
| "call{l}\t{*}$dst", [(X86call GR32:$dst)]>, OpSize32, |
| Requires<[Not64BitMode,NotUseRetpolineIndirectCalls]>, |
| Sched<[WriteJump]>; |
| def CALL32m : I<0xFF, MRM2m, (outs), (ins i32mem:$dst), |
| "call{l}\t{*}$dst", [(X86call (loadi32 addr:$dst))]>, |
| OpSize32, |
| Requires<[Not64BitMode,FavorMemIndirectCall, |
| NotUseRetpolineIndirectCalls]>, |
| Sched<[WriteJumpLd]>; |
| |
| // Non-tracking calls for IBT, use with caution. |
| let isCodeGenOnly = 1 in { |
| def CALL16r_NT : I<0xFF, MRM2r, (outs), (ins GR16 : $dst), |
| "call{w}\t{*}$dst",[(X86NoTrackCall GR16 : $dst)]>, |
| OpSize16, Requires<[Not64BitMode]>, Sched<[WriteJump]>, NOTRACK; |
| def CALL16m_NT : I<0xFF, MRM2m, (outs), (ins i16mem : $dst), |
| "call{w}\t{*}$dst",[(X86NoTrackCall(loadi16 addr : $dst))]>, |
| OpSize16, Requires<[Not64BitMode,FavorMemIndirectCall]>, |
| Sched<[WriteJumpLd]>, NOTRACK; |
| def CALL32r_NT : I<0xFF, MRM2r, (outs), (ins GR32 : $dst), |
| "call{l}\t{*}$dst",[(X86NoTrackCall GR32 : $dst)]>, |
| OpSize32, Requires<[Not64BitMode]>, Sched<[WriteJump]>, NOTRACK; |
| def CALL32m_NT : I<0xFF, MRM2m, (outs), (ins i32mem : $dst), |
| "call{l}\t{*}$dst",[(X86NoTrackCall(loadi32 addr : $dst))]>, |
| OpSize32, Requires<[Not64BitMode,FavorMemIndirectCall]>, |
| Sched<[WriteJumpLd]>, NOTRACK; |
| } |
| |
| let Predicates = [Not64BitMode], AsmVariantName = "att" in { |
| def FARCALL16i : Iseg16<0x9A, RawFrmImm16, (outs), |
| (ins i16imm:$off, i16imm:$seg), |
| "lcall{w}\t$seg, $off", []>, |
| OpSize16, Sched<[WriteJump]>; |
| def FARCALL32i : Iseg32<0x9A, RawFrmImm16, (outs), |
| (ins i32imm:$off, i16imm:$seg), |
| "lcall{l}\t$seg, $off", []>, |
| OpSize32, Sched<[WriteJump]>; |
| } |
| |
| def FARCALL16m : I<0xFF, MRM3m, (outs), (ins opaquemem:$dst), |
| "lcall{w}\t{*}$dst", []>, OpSize16, Sched<[WriteJumpLd]>; |
| def FARCALL32m : I<0xFF, MRM3m, (outs), (ins opaquemem:$dst), |
| "{l}call{l}\t{*}$dst", []>, OpSize32, Sched<[WriteJumpLd]>; |
| } |
| |
| |
| // Tail call stuff. |
| let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1, |
| isCodeGenOnly = 1, Uses = [ESP, SSP] in { |
| def TCRETURNdi : PseudoI<(outs), (ins i32imm_brtarget:$dst, i32imm:$offset), |
| []>, Sched<[WriteJump]>, NotMemoryFoldable; |
| def TCRETURNri : PseudoI<(outs), (ins ptr_rc_tailcall:$dst, i32imm:$offset), |
| []>, Sched<[WriteJump]>, NotMemoryFoldable; |
| let mayLoad = 1 in |
| def TCRETURNmi : PseudoI<(outs), (ins i32mem_TC:$dst, i32imm:$offset), |
| []>, Sched<[WriteJumpLd]>; |
| |
| def TAILJMPd : PseudoI<(outs), (ins i32imm_brtarget:$dst), |
| []>, Sched<[WriteJump]>; |
| |
| def TAILJMPr : PseudoI<(outs), (ins ptr_rc_tailcall:$dst), |
| []>, Sched<[WriteJump]>; |
| let mayLoad = 1 in |
| def TAILJMPm : PseudoI<(outs), (ins i32mem_TC:$dst), |
| []>, Sched<[WriteJumpLd]>; |
| } |
| |
| // Conditional tail calls are similar to the above, but they are branches |
| // rather than barriers, and they use EFLAGS. |
| let isCall = 1, isTerminator = 1, isReturn = 1, isBranch = 1, |
| isCodeGenOnly = 1, SchedRW = [WriteJump] in |
| let Uses = [ESP, EFLAGS, SSP] in { |
| def TCRETURNdicc : PseudoI<(outs), |
| (ins i32imm_brtarget:$dst, i32imm:$offset, i32imm:$cond), |
| []>; |
| |
| // This gets substituted to a conditional jump instruction in MC lowering. |
| def TAILJMPd_CC : PseudoI<(outs), (ins i32imm_brtarget:$dst, i32imm:$cond), []>; |
| } |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Call Instructions... |
| // |
| |
| // RSP is marked as a use to prevent stack-pointer assignments that appear |
| // immediately before calls from potentially appearing dead. Uses for argument |
| // registers are added manually. |
| let isCall = 1, Uses = [RSP, SSP], SchedRW = [WriteJump] in { |
| // NOTE: this pattern doesn't match "X86call imm", because we do not know |
| // that the offset between an arbitrary immediate and the call will fit in |
| // the 32-bit pcrel field that we have. |
| def CALL64pcrel32 : Ii32PCRel<0xE8, RawFrm, |
| (outs), (ins i64i32imm_brtarget:$dst), |
| "call{q}\t$dst", []>, OpSize32, |
| Requires<[In64BitMode]>; |
| def CALL64r : I<0xFF, MRM2r, (outs), (ins GR64:$dst), |
| "call{q}\t{*}$dst", [(X86call GR64:$dst)]>, |
| Requires<[In64BitMode,NotUseRetpolineIndirectCalls]>; |
| def CALL64m : I<0xFF, MRM2m, (outs), (ins i64mem:$dst), |
| "call{q}\t{*}$dst", [(X86call (loadi64 addr:$dst))]>, |
| Requires<[In64BitMode,FavorMemIndirectCall, |
| NotUseRetpolineIndirectCalls]>; |
| |
| // Non-tracking calls for IBT, use with caution. |
| let isCodeGenOnly = 1 in { |
| def CALL64r_NT : I<0xFF, MRM2r, (outs), (ins GR64 : $dst), |
| "call{q}\t{*}$dst",[(X86NoTrackCall GR64 : $dst)]>, |
| Requires<[In64BitMode]>, NOTRACK; |
| def CALL64m_NT : I<0xFF, MRM2m, (outs), (ins i64mem : $dst), |
| "call{q}\t{*}$dst", |
| [(X86NoTrackCall(loadi64 addr : $dst))]>, |
| Requires<[In64BitMode,FavorMemIndirectCall]>, NOTRACK; |
| } |
| |
| def FARCALL64 : RI<0xFF, MRM3m, (outs), (ins opaquemem:$dst), |
| "lcall{q}\t{*}$dst", []>; |
| } |
| |
| let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1, |
| isCodeGenOnly = 1, Uses = [RSP, SSP] in { |
| def TCRETURNdi64 : PseudoI<(outs), |
| (ins i64i32imm_brtarget:$dst, i32imm:$offset), |
| []>, Sched<[WriteJump]>; |
| def TCRETURNri64 : PseudoI<(outs), |
| (ins ptr_rc_tailcall:$dst, i32imm:$offset), |
| []>, Sched<[WriteJump]>, NotMemoryFoldable; |
| let mayLoad = 1 in |
| def TCRETURNmi64 : PseudoI<(outs), |
| (ins i64mem_TC:$dst, i32imm:$offset), |
| []>, Sched<[WriteJumpLd]>, NotMemoryFoldable; |
| |
| def TAILJMPd64 : PseudoI<(outs), (ins i64i32imm_brtarget:$dst), |
| []>, Sched<[WriteJump]>; |
| |
| def TAILJMPr64 : PseudoI<(outs), (ins ptr_rc_tailcall:$dst), |
| []>, Sched<[WriteJump]>; |
| |
| let mayLoad = 1 in |
| def TAILJMPm64 : PseudoI<(outs), (ins i64mem_TC:$dst), |
| []>, Sched<[WriteJumpLd]>; |
| |
| // Win64 wants indirect jumps leaving the function to have a REX_W prefix. |
| let hasREX_WPrefix = 1 in { |
| def TAILJMPr64_REX : PseudoI<(outs), (ins ptr_rc_tailcall:$dst), |
| []>, Sched<[WriteJump]>; |
| |
| let mayLoad = 1 in |
| def TAILJMPm64_REX : PseudoI<(outs), (ins i64mem_TC:$dst), |
| []>, Sched<[WriteJumpLd]>; |
| } |
| } |
| |
| let isPseudo = 1, isCall = 1, isCodeGenOnly = 1, |
| Uses = [RSP, SSP], |
| usesCustomInserter = 1, |
| SchedRW = [WriteJump] in { |
| def RETPOLINE_CALL32 : |
| PseudoI<(outs), (ins GR32:$dst), [(X86call GR32:$dst)]>, |
| Requires<[Not64BitMode,UseRetpolineIndirectCalls]>; |
| |
| def RETPOLINE_CALL64 : |
| PseudoI<(outs), (ins GR64:$dst), [(X86call GR64:$dst)]>, |
| Requires<[In64BitMode,UseRetpolineIndirectCalls]>; |
| |
| // Retpoline variant of indirect tail calls. |
| let isTerminator = 1, isReturn = 1, isBarrier = 1 in { |
| def RETPOLINE_TCRETURN64 : |
| PseudoI<(outs), (ins GR64:$dst, i32imm:$offset), []>; |
| def RETPOLINE_TCRETURN32 : |
| PseudoI<(outs), (ins GR32:$dst, i32imm:$offset), []>; |
| } |
| } |
| |
| // Conditional tail calls are similar to the above, but they are branches |
| // rather than barriers, and they use EFLAGS. |
| let isCall = 1, isTerminator = 1, isReturn = 1, isBranch = 1, |
| isCodeGenOnly = 1, SchedRW = [WriteJump] in |
| let Uses = [RSP, EFLAGS, SSP] in { |
| def TCRETURNdi64cc : PseudoI<(outs), |
| (ins i64i32imm_brtarget:$dst, i32imm:$offset, |
| i32imm:$cond), []>; |
| |
| // This gets substituted to a conditional jump instruction in MC lowering. |
| def TAILJMPd64_CC : PseudoI<(outs), |
| (ins i64i32imm_brtarget:$dst, i32imm:$cond), []>; |
| } |
