Here is a list of all files with brief descriptions:

include
mini-llvm
codegen
register_allocators
GraphColoringAllocator.h
LinearScanAllocator.h
NaiveAllocator.h
RegisterAllocator.h
common
ops
Add.h
And.h
ASHR.h
BitCast.h
EQ.h
FAdd.h
FDiv.h
FMul.h
FNeg.h
FPExt.h
FPToSI.h
FPToUI.h
FPTrunc.h
FRem.h
FSub.h
LSHR.h
Mul.h
NE.h
OEQ.h
OGE.h
OGT.h
OLE.h
OLT.h
ONE.h
Or.h
SDiv.h
SExt.h
SGE.h
SGT.h
SHL.h
SIToFP.h
SLE.h
SLT.h
SRem.h
Sub.h
Trunc.h
UDiv.h
UGE.h
UGT.h
UIToFP.h
ULE.h
ULT.h
URem.h
Xor.h
ZExt.h
Diagnostic.h
ExtensionMode.h
Linkage.h
Precision.h
SourceManager.h
ir
Attribute
AlwaysInline.h
ArgMemOnly.h
InaccessibleMemOnly.h
InaccessibleMemOrArgMemOnly.h
NoInline.h
ReadNone.h
ReadOnly.h
Constant
ArrayConstant.h
DoubleConstant.h
FloatConstant.h
FloatingConstant.h
I16Constant.h
I1Constant.h
I32Constant.h
I64Constant.h
I8Constant.h
IntegerConstant.h
NullPtrConstant.h
PointerConstant.h
PoisonValue.h
VoidValue.h
Instruction
Add.h
Alloca.h
And.h
ASHR.h
BinaryFloatingArithmeticOperator.h
BinaryFloatingOperator.h
BinaryFloatingRelationalOperator.h
BinaryIntegerArithmeticOperator.h
BinaryIntegerOperator.h
BinaryIntegerRelationalOperator.h
BitCast.h
Br.h
Call.h
CondBr.h
FAdd.h
FCmp.h
FDiv.h
FloatingCastingOperator.h
FloatingToIntegerCastingOperator.h
FMul.h
FNeg.h
FPExt.h
FPToSI.h
FPToUI.h
FPTrunc.h
FRem.h
FSub.h
GetElementPtr.h
ICmp.h
IndirectCall.h
IntegerCastingOperator.h
IntegerToFloatingCastingOperator.h
IntToPtr.h
Load.h
LSHR.h
Mul.h
Or.h
Phi.h
PtrToInt.h
Ret.h
SDiv.h
Select.h
SExt.h
SHL.h
SIToFP.h
SRem.h
Store.h
Sub.h
Terminator.h
Trunc.h
UDiv.h
UIToFP.h
UnaryFloatingArithmeticOperator.h
UnaryFloatingOperator.h
URem.h
Xor.h
ZExt.h
Type
ArrayType.h
BasicBlockType.h
Double.h
Float.h
FloatingType.h
FunctionType.h
I1.h
I16.h
I32.h
I64.h
I8.h
IntegerOrPointerType.h
IntegerType.h
Ptr.h
Void.h
Argument.h
Attribute.h
BasicBlock.h
Constant.h
ConstantVisitor.h
Function.h
GlobalValue.h
GlobalVar.h
Instruction.h
InstructionVisitor.h
Module.h
Type.h
TypeVisitor.h
Use.h
Value.h
ir_reader
IRReader.h
Lexer.h
Parser.h
Symbol.h
Token.h
mc
Directive.h
GlobalValue.h
GlobalValueBuilder.h
Instruction.h
Label.h
Module.h
Operand.h
Statement.h
StringDirective.h
Symbol.h
ZeroDirective.h
mir
Constant
I16ArrayConstant.h
I16Constant.h
I32ArrayConstant.h
I32Constant.h
I64ArrayConstant.h
I64Constant.h
I8ArrayConstant.h
I8Constant.h
PtrArrayConstant.h
PtrConstant.h
ZeroConstant.h
Instruction
Add.h
AddI.h
And.h
AndI.h
BinaryOperator.h
BinaryOperatorI.h
Br.h
Cmp.h
CmpBr.h
CmpSet.h
CmpZ.h
CmpZBr.h
CmpZSet.h
CondBr.h
CondSet.h
FAdd.h
FakeUse.h
FBinaryOperator.h
FCmp.h
FCmpSet.h
FCvt.h
FCvtFS.h
FCvtFU.h
FCvtSF.h
FCvtUF.h
FDiv.h
FLoad.h
FMov.h
FMovFI.h
FMovIF.h
FMul.h
FNeg.h
FStore.h
FSub.h
FUnaryOperator.h
LA.h
LI.h
Load.h
Marker.h
Mov.h
Mul.h
Neg.h
Not.h
Or.h
OrI.h
SDiv.h
SExt.h
SHL.h
SHLI.h
SHRA.h
SHRAI.h
SHRL.h
SHRLI.h
SRem.h
Store.h
Sub.h
SubI.h
Terminator.h
UDiv.h
UnaryOperator.h
URem.h
Xor.h
XorI.h
BasicBlock.h
BasicBlockBuilder.h
BasicBlockOperand.h
Condition.h
Constant.h
ConstantVisitor.h
FormatExtensionMode.h
FormatPrecision.h
Function.h
FunctionOperand.h
GlobalValue.h
GlobalValueOperand.h
GlobalVar.h
Immediate.h
ImmediateOperand.h
Instruction.h
InstructionVisitor.h
IntegerImmediate.h
MemoryOperand.h
Module.h
PhysicalRegister.h
Register.h
RegisterClass.h
RegisterOperand.h
StackFrame.h
StackOffsetImmediate.h
StackSlot.h
VirtualRegister.h
opt
ir
passes
AlgebraicSimplification.h
AliasAnalysis.h
ArrayFlattening.h
AttributeDeduction.h
BasicBlockMerging.h
BranchSimplification.h
ConstantFolding.h
DeadCodeElimination.h
DeadStoreElimination.h
DominatorTreeAnalysis.h
FunctionInlining.h
GlobalCodeMotion.h
GlobalDeadCodeElimination.h
GlobalValueNumbering.h
InstructionCombining.h
JumpThreading.h
LoopTreeAnalysis.h
Mem2Reg.h
PoisonPropagation.h
RedundantLoadElimination.h
StrengthReduction.h
TailCallElimination.h
TailDuplication.h
UnreachableBlockElimination.h
FunctionAnalysis.h
FunctionTransform.h
ModuleAnalysis.h
ModuleTransform.h
PassManager.h
mc
GlobalValueTransform.h
ModuleTransform.h
mir
passes
BasicBlockMerging.h
BasicBlockReordering.h
BranchPredictionAnalysis.h
CopyPropagation.h
DeadCodeElimination.h
JumpThreading.h
LiveVariableAnalysis.h
NullOperationElimination.h
RegisterReuse.h
StackOffsetEvaluation.h
TailDuplication.h
UnreachableBlockElimination.h
ZeroRegisterReplacement.h
BasicBlockAnalysis.h
BasicBlockTransform.h
FunctionAnalysis.h
FunctionTransform.h
ModuleAnalysis.h
ModuleTransform.h
targets
riscv
codegen
RISCVMCGen.h
RISCVMIRGen.h
mc
RISCVAddress.h
RISCVAddressDirective.h
RISCVAddressOperand.h
RISCVDataDirective.h
RISCVImmediateOperand.h
RISCVInstruction.h
RISCVMemoryOperand.h
RISCVOperation.h
RISCVRegister.h
RISCVRegisterOperand.h
mir
Instruction
RISCVCall.h
RISCVJALR.h
RISCVRet.h
RISCVInstructionVisitor.h
RISCVRegister.h
opt
mc
passes
RISCVFallthrough.h
RISCVUnusedLabelElimination.h
RISCVPassManager.h
mir
passes
RISCVConstantPropagation.h
RISCVPassManager.h
RISCVBackendDriver.h
utils
ArrowProxy.h
Ascii.h
BigInteger.h
Color.h
CommandLineParser.h
Compiler.h
Dot.h
ErrorCode.h
Expected.h
FileHandle.h
FunctionRef.h
HashCombine.h
HashMap.h
IndirectIterator.h
IO.h
Matrix.h
Memory.h
OptionalReference.h
Path.h
PCG32.h
ProcessorDetection.h
SequenceOps.h
SetOps.h
StringJoiner.h
Strings.h
SystemError.h
SystemString.h
Unicode.h
Windows.h