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SchedulerDAGInstrs::buildSchedGraph ignores dependencies between FixedStack objects and byval parameters. So loading byval parameters from stack may be inserted *before* it will be stored, since these operations are treated as independent. Fix: Currently ARMTargetLowering::LowerFormalArguments saves byval registers with FixedStack MachinePointerInfo. To fix the problem we need to store byval registers with MachinePointerInfo referenced to first the "byval" parameter. Also commit adds two new fields to the InputArg structure: Function's argument index and InputArg's part offset in bytes relative to the start position of Function's argument. E.g.: If function's argument is 128 bit width and it was splitted onto 32 bit regs, then we got 4 InputArg structs with same arg index, but different offset values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165616 91177308-0d34-0410-b5e6-96231b3b80d8
154 lines
5.1 KiB
C++
154 lines
5.1 KiB
C++
//===-- llvm/Target/TargetCallingConv.h - Calling Convention ----*- C++ -*-===//
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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 file defines types for working with calling-convention information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETCALLINGCONV_H
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#define LLVM_TARGET_TARGETCALLINGCONV_H
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/MathExtras.h"
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#include <string>
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namespace llvm {
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namespace ISD {
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struct ArgFlagsTy {
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private:
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static const uint64_t NoFlagSet = 0ULL;
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static const uint64_t ZExt = 1ULL<<0; ///< Zero extended
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static const uint64_t ZExtOffs = 0;
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static const uint64_t SExt = 1ULL<<1; ///< Sign extended
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static const uint64_t SExtOffs = 1;
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static const uint64_t InReg = 1ULL<<2; ///< Passed in register
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static const uint64_t InRegOffs = 2;
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static const uint64_t SRet = 1ULL<<3; ///< Hidden struct-ret ptr
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static const uint64_t SRetOffs = 3;
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static const uint64_t ByVal = 1ULL<<4; ///< Struct passed by value
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static const uint64_t ByValOffs = 4;
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static const uint64_t Nest = 1ULL<<5; ///< Nested fn static chain
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static const uint64_t NestOffs = 5;
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static const uint64_t ByValAlign = 0xFULL << 6; ///< Struct alignment
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static const uint64_t ByValAlignOffs = 6;
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static const uint64_t Split = 1ULL << 10;
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static const uint64_t SplitOffs = 10;
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static const uint64_t OrigAlign = 0x1FULL<<27;
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static const uint64_t OrigAlignOffs = 27;
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static const uint64_t ByValSize = 0xffffffffULL << 32; ///< Struct size
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static const uint64_t ByValSizeOffs = 32;
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static const uint64_t One = 1ULL; ///< 1 of this type, for shifts
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uint64_t Flags;
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public:
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ArgFlagsTy() : Flags(0) { }
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bool isZExt() const { return Flags & ZExt; }
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void setZExt() { Flags |= One << ZExtOffs; }
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bool isSExt() const { return Flags & SExt; }
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void setSExt() { Flags |= One << SExtOffs; }
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bool isInReg() const { return Flags & InReg; }
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void setInReg() { Flags |= One << InRegOffs; }
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bool isSRet() const { return Flags & SRet; }
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void setSRet() { Flags |= One << SRetOffs; }
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bool isByVal() const { return Flags & ByVal; }
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void setByVal() { Flags |= One << ByValOffs; }
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bool isNest() const { return Flags & Nest; }
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void setNest() { Flags |= One << NestOffs; }
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unsigned getByValAlign() const {
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return (unsigned)
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((One << ((Flags & ByValAlign) >> ByValAlignOffs)) / 2);
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}
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void setByValAlign(unsigned A) {
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Flags = (Flags & ~ByValAlign) |
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(uint64_t(Log2_32(A) + 1) << ByValAlignOffs);
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}
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bool isSplit() const { return Flags & Split; }
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void setSplit() { Flags |= One << SplitOffs; }
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unsigned getOrigAlign() const {
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return (unsigned)
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((One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2);
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}
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void setOrigAlign(unsigned A) {
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Flags = (Flags & ~OrigAlign) |
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(uint64_t(Log2_32(A) + 1) << OrigAlignOffs);
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}
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unsigned getByValSize() const {
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return (unsigned)((Flags & ByValSize) >> ByValSizeOffs);
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}
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void setByValSize(unsigned S) {
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Flags = (Flags & ~ByValSize) | (uint64_t(S) << ByValSizeOffs);
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}
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/// getArgFlagsString - Returns the flags as a string, eg: "zext align:4".
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std::string getArgFlagsString();
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/// getRawBits - Represent the flags as a bunch of bits.
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uint64_t getRawBits() const { return Flags; }
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};
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/// InputArg - This struct carries flags and type information about a
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/// single incoming (formal) argument or incoming (from the perspective
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/// of the caller) return value virtual register.
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///
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struct InputArg {
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ArgFlagsTy Flags;
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MVT VT;
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bool Used;
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/// Index original Function's argument.
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unsigned OrigArgIndex;
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/// Offset in bytes of current input value relative to the beginning of
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/// original argument. E.g. if argument was splitted into four 32 bit
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/// registers, we got 4 InputArgs with PartOffsets 0, 4, 8 and 12.
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unsigned PartOffset;
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InputArg() : VT(MVT::Other), Used(false) {}
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InputArg(ArgFlagsTy flags, EVT vt, bool used,
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unsigned origIdx, unsigned partOffs)
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: Flags(flags), Used(used), OrigArgIndex(origIdx), PartOffset(partOffs) {
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VT = vt.getSimpleVT();
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}
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};
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/// OutputArg - This struct carries flags and a value for a
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/// single outgoing (actual) argument or outgoing (from the perspective
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/// of the caller) return value virtual register.
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///
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struct OutputArg {
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ArgFlagsTy Flags;
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MVT VT;
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/// IsFixed - Is this a "fixed" value, ie not passed through a vararg "...".
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bool IsFixed;
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OutputArg() : IsFixed(false) {}
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OutputArg(ArgFlagsTy flags, EVT vt, bool isfixed)
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: Flags(flags), IsFixed(isfixed) {
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VT = vt.getSimpleVT();
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}
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};
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}
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} // end llvm namespace
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#endif
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