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b7e11e400d
As Bill Schmidt pointed out to me, only on Darwin do we need to spill/restore VRSAVE in the SjLj code. For non-Darwin, don't spill/restore VRSAVE (and I've added some asserts to make sure that we're not). As it turns out, we're not currently handling the Darwin case correctly (I've added a FIXME in the test case). I've tried adding various implied register definitions/uses to force the spill without success, so I'll need to address this later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178096 91177308-0d34-0410-b5e6-96231b3b80d8
145 lines
6.6 KiB
TableGen
145 lines
6.6 KiB
TableGen
//===- PPCCallingConv.td - Calling Conventions for PowerPC -*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This describes the calling conventions for the PowerPC 32- and 64-bit
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// architectures.
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//
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//===----------------------------------------------------------------------===//
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/// CCIfSubtarget - Match if the current subtarget has a feature F.
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class CCIfSubtarget<string F, CCAction A>
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: CCIf<!strconcat("State.getTarget().getSubtarget<PPCSubtarget>().", F), A>;
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//===----------------------------------------------------------------------===//
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// Return Value Calling Convention
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//===----------------------------------------------------------------------===//
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// Return-value convention for PowerPC
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def RetCC_PPC : CallingConv<[
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// On PPC64, integer return values are always promoted to i64
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CCIfType<[i32], CCIfSubtarget<"isPPC64()", CCPromoteToType<i64>>>,
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CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
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CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6]>>,
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CCIfType<[i128], CCAssignToReg<[X3, X4, X5, X6]>>,
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CCIfType<[f32], CCAssignToReg<[F1, F2]>>,
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CCIfType<[f64], CCAssignToReg<[F1, F2, F3, F4]>>,
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// Vector types are always returned in V2.
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CCIfType<[v16i8, v8i16, v4i32, v4f32], CCAssignToReg<[V2]>>
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]>;
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//===----------------------------------------------------------------------===//
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// PowerPC System V Release 4 32-bit ABI
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//===----------------------------------------------------------------------===//
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def CC_PPC32_SVR4_Common : CallingConv<[
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// The ABI requires i64 to be passed in two adjacent registers with the first
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// register having an odd register number.
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CCIfType<[i32], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignArgRegs">>>,
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// The first 8 integer arguments are passed in integer registers.
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CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
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// Make sure the i64 words from a long double are either both passed in
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// registers or both passed on the stack.
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CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignFPArgRegs">>>,
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// FP values are passed in F1 - F8.
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CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
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// Split arguments have an alignment of 8 bytes on the stack.
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CCIfType<[i32], CCIfSplit<CCAssignToStack<4, 8>>>,
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CCIfType<[i32], CCAssignToStack<4, 4>>,
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// Floats are stored in double precision format, thus they have the same
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// alignment and size as doubles.
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CCIfType<[f32,f64], CCAssignToStack<8, 8>>,
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// Vectors get 16-byte stack slots that are 16-byte aligned.
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CCIfType<[v16i8, v8i16, v4i32, v4f32], CCAssignToStack<16, 16>>
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]>;
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// This calling convention puts vector arguments always on the stack. It is used
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// to assign vector arguments which belong to the variable portion of the
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// parameter list of a variable argument function.
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def CC_PPC32_SVR4_VarArg : CallingConv<[
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CCDelegateTo<CC_PPC32_SVR4_Common>
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]>;
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// In contrast to CC_PPC32_SVR4_VarArg, this calling convention first tries to
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// put vector arguments in vector registers before putting them on the stack.
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def CC_PPC32_SVR4 : CallingConv<[
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// The first 12 Vector arguments are passed in AltiVec registers.
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CCIfType<[v16i8, v8i16, v4i32, v4f32],
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CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13]>>,
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CCDelegateTo<CC_PPC32_SVR4_Common>
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]>;
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// Helper "calling convention" to handle aggregate by value arguments.
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// Aggregate by value arguments are always placed in the local variable space
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// of the caller. This calling convention is only used to assign those stack
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// offsets in the callers stack frame.
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//
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// Still, the address of the aggregate copy in the callers stack frame is passed
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// in a GPR (or in the parameter list area if all GPRs are allocated) from the
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// caller to the callee. The location for the address argument is assigned by
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// the CC_PPC32_SVR4 calling convention.
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//
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// The only purpose of CC_PPC32_SVR4_Custom_Dummy is to skip arguments which are
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// not passed by value.
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def CC_PPC32_SVR4_ByVal : CallingConv<[
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CCIfByVal<CCPassByVal<4, 4>>,
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CCCustom<"CC_PPC32_SVR4_Custom_Dummy">
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]>;
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def CSR_Darwin32 : CalleeSavedRegs<(add R13, R14, R15, R16, R17, R18, R19, R20,
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R21, R22, R23, R24, R25, R26, R27, R28,
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R29, R30, R31, F14, F15, F16, F17, F18,
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F19, F20, F21, F22, F23, F24, F25, F26,
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F27, F28, F29, F30, F31, CR2, CR3, CR4,
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V20, V21, V22, V23, V24, V25, V26, V27,
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V28, V29, V30, V31)>;
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def CSR_SVR432 : CalleeSavedRegs<(add R14, R15, R16, R17, R18, R19, R20, VRSAVE,
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R21, R22, R23, R24, R25, R26, R27, R28,
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R29, R30, R31, F14, F15, F16, F17, F18,
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F19, F20, F21, F22, F23, F24, F25, F26,
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F27, F28, F29, F30, F31, CR2, CR3, CR4,
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V20, V21, V22, V23, V24, V25, V26, V27,
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V28, V29, V30, V31)>;
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def CSR_Darwin64 : CalleeSavedRegs<(add X13, X14, X15, X16, X17, X18, X19, X20,
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X21, X22, X23, X24, X25, X26, X27, X28,
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X29, X30, X31, F14, F15, F16, F17, F18,
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F19, F20, F21, F22, F23, F24, F25, F26,
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F27, F28, F29, F30, F31, CR2, CR3, CR4,
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V20, V21, V22, V23, V24, V25, V26, V27,
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V28, V29, V30, V31)>;
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def CSR_SVR464 : CalleeSavedRegs<(add X14, X15, X16, X17, X18, X19, X20, VRSAVE,
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X21, X22, X23, X24, X25, X26, X27, X28,
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X29, X30, X31, F14, F15, F16, F17, F18,
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F19, F20, F21, F22, F23, F24, F25, F26,
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F27, F28, F29, F30, F31, CR2, CR3, CR4,
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V20, V21, V22, V23, V24, V25, V26, V27,
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V28, V29, V30, V31)>;
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def CSR_NoRegs : CalleeSavedRegs<(add VRSAVE)>;
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def CSR_NoRegs_Darwin : CalleeSavedRegs<(add)>;
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def CSR_NoRegs_Altivec : CalleeSavedRegs<(add (sequence "V%u", 0, 31), VRSAVE)>;
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