LLVMUtilities.hh File Reference

#include <string>
#include <tuple>
#include <map>
#include <vector>
#include "llvm/IR/InlineAsm.h"

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Namespaces
namespace	llvm

Typedefs
using	AsmOperands = std::tuple< unsigned, std::vector< const llvm::MachineOperand * > >
	First = Inline asm kind defined in llvm/IR/InlineAsm.h Second = The associated operands.
using	AsmPosition = unsigned
	Inline assembly operand position. The numbers are matched to template strings in inline asm texts - e.g. 2 => "$2".
using	AsmOperandMap = std::map< AsmPosition, AsmOperands >

Functions
std::tuple< std::string, size_t >	getSourceLocationInfo (const llvm::MachineInstr &mi)
std::string	getSourceLocationString (const llvm::MachineInstr &mi)
AsmOperandMap	getInlineAsmOperands (const llvm::MachineInstr &mi)

Typedef Documentation

AsmOperandMap

using AsmOperandMap = std::map<AsmPosition, AsmOperands>

Definition at line 60 of file LLVMUtilities.hh.

AsmOperands

using AsmOperands = std::tuple< unsigned, std::vector<const llvm::MachineOperand*> >

First = Inline asm kind defined in llvm/IR/InlineAsm.h Second = The associated operands.

Definition at line 55 of file LLVMUtilities.hh.

AsmPosition

using AsmPosition = unsigned

Inline assembly operand position. The numbers are matched to template strings in inline asm texts - e.g. 2 => "$2".

Definition at line 59 of file LLVMUtilities.hh.

Function Documentation

getInlineAsmOperands()

AsmOperandMap getInlineAsmOperands

(

const llvm::MachineInstr &

mi

)

Decodes operands of INLINEASM instruction into more manageable struct.

Definition at line 92 of file LLVMUtilities.cc.

                                                 {
    using namespace llvm;
    AsmOperandMap result;
 
    unsigned asmOpdPos = 0;
    unsigned endPos = mi.getNumOperands();
    unsigned i = InlineAsm::MIOp_FirstOperand;
 
    while (i < endPos) {
        const MachineOperand& mo = mi.getOperand(i);
        if (mo.isMetadata())  {
            i++;
            continue;
        }
        unsigned opdKind = InlineAsm::getKind(mo.getImm());
        unsigned numAsmOpds = InlineAsm::getNumOperandRegisters(mo.getImm());
        unsigned flagOpdBegin = i + 1;
        unsigned flagOpdEnd = flagOpdBegin + numAsmOpds;
        std::vector<const llvm::MachineOperand*> flagOps;
        for (unsigned opdIdx = flagOpdBegin; opdIdx < flagOpdEnd; opdIdx++) {
            flagOps.push_back(&mi.getOperand(opdIdx));
        }
        result.insert({asmOpdPos, std::make_tuple(opdKind, flagOps)});
 
        i += numAsmOpds + 1;
        asmOpdPos += 1;
    }
 
    return result;
}

Referenced by InlineAsmParser::addLiveRangeData(), llvm::LLVMTCEBuilder::emitInlineAsm(), and InlineAsmParser::substituteAsmString().

getSourceLocationInfo()

std::tuple< std::string, size_t > getSourceLocationInfo

(

const llvm::MachineInstr &

mi

)

Extracts source location info from the instruction.

If the instruction does not have debug info returns ("", 0);

Definition at line 54 of file LLVMUtilities.cc.

                                                  {
    using namespace llvm;
    DebugLoc dl = mi.getDebugLoc();
    if (!dl) return std::make_tuple("", 0);
 
    bool hasDebugInfo = false;
    hasDebugInfo = dl.getScope() != NULL;
    if (!hasDebugInfo) return std::make_tuple("", 0);
 
    size_t sourceLineNumber = 0;
    TCEString sourceFileName = "";
 
    // inspired from lib/codegen/MachineInstr.cpp
    sourceLineNumber = dl.getLine();
    sourceFileName = static_cast<TCEString>(
        cast<DIScope>(dl.getScope())->getFilename().str());
    return std::make_tuple(sourceFileName, sourceLineNumber);
}

Referenced by InlineAsmParser::addDebugInfoToInlineAsmBB(), llvm::LLVMTCEBuilder::emitInlineAsm(), getSourceLocationString(), and InlineAsmParser::substituteAsmString().

getSourceLocationString()

std::string getSourceLocationString

(

const llvm::MachineInstr &

mi

)

Returns source location as "<src-file>:<src-line>: " string if available.

Otherwise return empty string.

Definition at line 78 of file LLVMUtilities.cc.

                                                              {
    std::string srcFile;
    unsigned srcLine;
    std::tie(srcFile, srcLine) = getSourceLocationInfo(mi);
    if (!srcFile.empty()) {
        return srcFile + ":" + std::to_string(srcLine) + ": ";
    }
    return "";
}

References getSourceLocationInfo().

Referenced by llvm::LLVMTCEBuilder::emitInlineAsm().

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