Based on cmake/modules/LLVMLibDeps.cmake, I produced a graphviz dot file and then manually removed components and edges until the graph was small enough to be presentable. I don’t know if I can actually use LLVM due to its humongousness, but I hope the graph will be helpful to others attempting to comprehend LLVM. PNG attached; dot file follows.
digraph G {
ipo [shape=box,style=filled,color=olivedrab1];
ipa [shape=box,style=filled,color=olivedrab1];
X86Info [shape=box,style=filled,color=olivedrab1];
X86Disassembler [shape=box,style=filled,color=olivedrab1];
X86CodeGen [shape=box,style=filled,color=olivedrab1];
X86AsmPrinter [shape=box,style=filled,color=olivedrab1];
X86AsmParser [shape=box,style=filled,color=olivedrab1];
TransformUtils [shape=box,style=filled,color=olivedrab1];
Target [shape=box,style=filled,color=olivedrab1];
System [shape=box,style=filled,color=olivedrab1];
Support [shape=box,style=filled,color=olivedrab1];
SelectionDAG [shape=box,style=filled,color=olivedrab1];
ScalarOpts [shape=box,style=filled,color=olivedrab1];
MCParser [shape=box,style=filled,color=olivedrab1];
MC [shape=box,style=filled,color=olivedrab1];
Linker [shape=box,style=filled,color=olivedrab1];
JIT [shape=box,style=filled,color=olivedrab1];
Interpreter [shape=box,style=filled,color=olivedrab1];
Instrumentation [shape=box,style=filled,color=olivedrab1];
InstCombine [shape=box,style=filled,color=olivedrab1];
ExecutionEngine [shape=box,style=filled,color=olivedrab1];
Core [shape=box,style=filled,color=olivedrab1];
CodeGen [shape=box,style=filled,color=olivedrab1];
BitWriter [shape=box,style=filled,color=olivedrab1];
BitReader [shape=box,style=filled,color=olivedrab1];
AsmPrinter [shape=box,style=filled,color=olivedrab1];
AsmParser [shape=box,style=filled,color=olivedrab1];
Archive [shape=box,style=filled,color=olivedrab1];
Analysis [shape=box,style=filled,color=olivedrab1];
ARMInfo [shape=box,style=filled,color=olivedrab1];
ARMCodeGen [shape=box,style=filled,color=olivedrab1];
ARMAsmPrinter [shape=box,style=filled,color=olivedrab1];
ARMAsmParser [shape=box,style=filled,color=olivedrab1];
subgraph clusterARM { ARMAsmParser; ARMAsmPrinter; ARMInfo; ARMCodeGen; }
subgraph clusterX86 { X86AsmParser; X86AsmPrinter; X86Info; X86CodeGen; }
ARMAsmParser → ARMInfo
ARMAsmParser → MCParser
//ARMAsmParser → Support
ARMAsmPrinter → ARMCodeGen
ARMAsmPrinter → ARMInfo
ARMAsmPrinter → AsmPrinter
ARMAsmPrinter → CodeGen
//ARMAsmPrinter → Core
//ARMAsmPrinter → MC
//ARMAsmPrinter → Support
//ARMAsmPrinter → System
//ARMAsmPrinter → Target
ARMInfo → Support
ARMCodeGen → ARMInfo
ARMCodeGen → CodeGen
//ARMCodeGen → Core
//ARMCodeGen → MC
ARMCodeGen → SelectionDAG
//ARMCodeGen → Support
//ARMCodeGen → System
//ARMCodeGen → Target
//Analysis → Core
//Analysis → Support
//Analysis → System
Analysis → Target
Archive → BitReader
Archive → Core
//Archive → Support
//Archive → System
AsmPrinter → Analysis
AsmPrinter → CodeGen
//AsmPrinter → Core
//AsmPrinter → MC
//AsmPrinter → Support
//AsmPrinter → System
//AsmPrinter → Target
CodeGen → Analysis
//CodeGen → Core
CodeGen → MC
CodeGen → ScalarOpts
//CodeGen → Support
//CodeGen → System
//CodeGen → Target
CodeGen → TransformUtils
//ExecutionEngine → Core
//ExecutionEngine → Support
//ExecutionEngine → System
ExecutionEngine → Target
InstCombine → Analysis
//InstCombine → Core
//InstCombine → Support
//InstCombine → System
//InstCombine → Target
InstCombine → TransformUtils
Instrumentation → Analysis
//Instrumentation → Core
//Instrumentation → Support
//Instrumentation → System
Instrumentation → TransformUtils
Interpreter → CodeGen
//Interpreter → Core
Interpreter → ExecutionEngine
//Interpreter → Support
//Interpreter → System
//Interpreter → Target
JIT → Analysis
JIT → CodeGen
//JIT → Core
JIT → ExecutionEngine
//JIT → MC
//JIT → Support
//JIT → System
//JIT → Target
Linker → Archive
Linker → BitReader
//Linker → Core
//Linker → Support
//Linker → System
ScalarOpts → Analysis
//ScalarOpts → Core
ScalarOpts → InstCombine
//ScalarOpts → Support
//ScalarOpts → System
//ScalarOpts → Target
ScalarOpts → TransformUtils
SelectionDAG → Analysis
SelectionDAG → AsmPrinter
SelectionDAG → CodeGen
//SelectionDAG → Core
//SelectionDAG → Support
//SelectionDAG → System
//SelectionDAG → Target
TransformUtils → Analysis
//TransformUtils → Core
//TransformUtils → Support
//TransformUtils → System
//TransformUtils → Target
TransformUtils → ipa
X86AsmParser → MC
X86AsmParser → MCParser
//X86AsmParser → Support
X86AsmParser → X86Info
X86AsmPrinter → Analysis
X86AsmPrinter → AsmPrinter
X86AsmPrinter → CodeGen
//X86AsmPrinter → Core
//X86AsmPrinter → MC
//X86AsmPrinter → Support
//X86AsmPrinter → System
//X86AsmPrinter → Target
X86AsmPrinter → X86CodeGen
X86AsmPrinter → X86Info
X86CodeGen → CodeGen
//X86CodeGen → Core
//X86CodeGen → MC
X86CodeGen → SelectionDAG
//X86CodeGen → Support
//X86CodeGen → System
//X86CodeGen → Target
X86CodeGen → X86Info
X86Info → Support
X86Disassembler → MC
//X86Disassembler → Support
X86Disassembler → X86Info
ipa → Analysis
//ipa → Core
//ipa → Support
//ipa → System
ipo → Analysis
//ipo → Core
//ipo → Support
//ipo → System
//ipo → Target
ipo → TransformUtils
ipo → ipa
Target → Core
Target → MC
//Target → Support
AsmParser → Core
//AsmParser → Support
BitReader → Core
//BitReader → Support
BitWriter → Core
//BitWriter → Support
//BitWriter → System
Core → Support
Core → System
MCParser → MC
//MCParser → Support
MC → Support
//MC → System
Support → System
/*
XCoreInfo → Support
XCore → CodeGen
XCore → Core
XCore → MC
XCore → SelectionDAG
XCore → Support
XCore → Target
XCore → XCoreInfo
XCoreAsmPrinter → AsmPrinter
XCoreAsmPrinter → CodeGen
XCoreAsmPrinter → Core
XCoreAsmPrinter → MC
XCoreAsmPrinter → Support
XCoreAsmPrinter → System
XCoreAsmPrinter → Target
XCoreAsmPrinter → XCoreInfo
MSP430Info → Support
MSP430AsmPrinter → AsmPrinter
MSP430AsmPrinter → CodeGen
MSP430AsmPrinter → Core
MSP430AsmPrinter → MC
MSP430AsmPrinter → MSP430Info
MSP430AsmPrinter → Support
MSP430AsmPrinter → System
MSP430AsmPrinter → Target
MSP430CodeGen → CodeGen
MSP430CodeGen → Core
MSP430CodeGen → MC
MSP430CodeGen → MSP430Info
MSP430CodeGen → SelectionDAG
MSP430CodeGen → Support
MSP430CodeGen → System
MSP430CodeGen → Target
MipsInfo → Support
MipsAsmPrinter → AsmPrinter
MipsAsmPrinter → CodeGen
MipsAsmPrinter → Core
MipsAsmPrinter → MC
MipsAsmPrinter → MipsCodeGen
MipsAsmPrinter → MipsInfo
MipsAsmPrinter → Support
MipsAsmPrinter → System
MipsAsmPrinter → Target
MipsCodeGen → CodeGen
MipsCodeGen → Core
MipsCodeGen → MC
MipsCodeGen → MipsInfo
MipsCodeGen → SelectionDAG
MipsCodeGen → Support
MipsCodeGen → System
MipsCodeGen → Target
PIC16Info → Support
PIC16 → Analysis
PIC16 → CodeGen
PIC16 → Core
PIC16 → MC
PIC16 → PIC16Info
PIC16 → SelectionDAG
PIC16 → Support
PIC16 → Target
PIC16AsmPrinter → AsmPrinter
PIC16AsmPrinter → CodeGen
PIC16AsmPrinter → Core
PIC16AsmPrinter → MC
PIC16AsmPrinter → PIC16
PIC16AsmPrinter → PIC16Info
PIC16AsmPrinter → Support
PIC16AsmPrinter → Target
PowerPCInfo → Support
PowerPCAsmPrinter → AsmPrinter
PowerPCAsmPrinter → CodeGen
PowerPCAsmPrinter → Core
PowerPCAsmPrinter → MC
PowerPCAsmPrinter → PowerPCInfo
PowerPCAsmPrinter → Support
PowerPCAsmPrinter → System
PowerPCAsmPrinter → Target
PowerPCCodeGen → CodeGen
PowerPCCodeGen → Core
PowerPCCodeGen → MC
PowerPCCodeGen → PowerPCInfo
PowerPCCodeGen → SelectionDAG
PowerPCCodeGen → Support
PowerPCCodeGen → System
PowerPCCodeGen → Target
SystemZInfo → Support
SystemZAsmPrinter → AsmPrinter
SystemZAsmPrinter → CodeGen
SystemZAsmPrinter → Core
SystemZAsmPrinter → MC
SystemZAsmPrinter → Support
SystemZAsmPrinter → System
SystemZAsmPrinter → SystemZInfo
SystemZAsmPrinter → Target
SystemZCodeGen → CodeGen
SystemZCodeGen → Core
SystemZCodeGen → MC
SystemZCodeGen → SelectionDAG
SystemZCodeGen → Support
SystemZCodeGen → SystemZInfo
SystemZCodeGen → Target
MSILInfo → Support
MSIL → Analysis
MSIL → CodeGen
MSIL → Core
MSIL → MSILInfo
MSIL → ScalarOpts
MSIL → Support
MSIL → Target
MSIL → TransformUtils
MSIL → ipa
CppBackendInfo → Support
CppBackend → Core
CppBackend → CppBackendInfo
CppBackend → Support
CppBackend → Target
AlphaInfo → Support
AlphaAsmPrinter → AlphaInfo
AlphaAsmPrinter → AsmPrinter
AlphaAsmPrinter → CodeGen
AlphaAsmPrinter → Core
AlphaAsmPrinter → MC
AlphaAsmPrinter → Support
AlphaAsmPrinter → System
AlphaAsmPrinter → Target
AlphaCodeGen → AlphaInfo
AlphaCodeGen → CodeGen
AlphaCodeGen → Core
AlphaCodeGen → MC
AlphaCodeGen → SelectionDAG
AlphaCodeGen → Support
AlphaCodeGen → System
AlphaCodeGen → Target
SparcInfo → Support
SparcAsmPrinter → AsmPrinter
SparcAsmPrinter → CodeGen
SparcAsmPrinter → Core
SparcAsmPrinter → MC
SparcAsmPrinter → SparcInfo
SparcAsmPrinter → Support
SparcAsmPrinter → System
SparcAsmPrinter → Target
SparcCodeGen → CodeGen
SparcCodeGen → Core
SparcCodeGen → MC
SparcCodeGen → SelectionDAG
SparcCodeGen → SparcInfo
SparcCodeGen → Support
SparcCodeGen → System
SparcCodeGen → Target
BlackfinInfo → Support
BlackfinAsmPrinter → AsmPrinter
BlackfinAsmPrinter → BlackfinInfo
BlackfinAsmPrinter → CodeGen
BlackfinAsmPrinter → Core
BlackfinAsmPrinter → MC
BlackfinAsmPrinter → Support
BlackfinAsmPrinter → System
BlackfinAsmPrinter → Target
BlackfinCodeGen → BlackfinInfo
BlackfinCodeGen → CodeGen
BlackfinCodeGen → Core
BlackfinCodeGen → MC
BlackfinCodeGen → SelectionDAG
BlackfinCodeGen → Support
BlackfinCodeGen → Target
CBackendInfo → Support
CBackend → Analysis
CBackend → CBackendInfo
CBackend → CodeGen
CBackend → Core
CBackend → MC
CBackend → ScalarOpts
CBackend → Support
CBackend → System
CBackend → Target
CBackend → TransformUtils
CBackend → ipa
CellSPUInfo → Support
CellSPUAsmPrinter → AsmPrinter
CellSPUAsmPrinter → CellSPUInfo
CellSPUAsmPrinter → CodeGen
CellSPUAsmPrinter → Core
CellSPUAsmPrinter → MC
CellSPUAsmPrinter → Support
CellSPUAsmPrinter → System
CellSPUAsmPrinter → Target
CellSPUCodeGen → CellSPUInfo
CellSPUCodeGen → CodeGen
CellSPUCodeGen → Core
CellSPUCodeGen → MC
CellSPUCodeGen → SelectionDAG
CellSPUCodeGen → Support
CellSPUCodeGen → Target
*/
}
