2cff995e91
When spill slots are eliminated (VGPR-to-AGPR, SGPR-to-VGPR lanes), debug values referencing these frame indices were not always properly cleaned up. This caused an assertion failure in getObjectOffset() when PrologEpilogInserter tried to access the offset of a dead frame object. The existing debug fixup code in SIFrameLowering and SILowerSGPRSpills had two limitations: 1. It only checked one operand position, but DBG_VALUE_LIST instructions can have multiple debug operands with frame indices. 2. It didn't handle all types of dead frame indices uniformly. Fix by centralizing debug info cleanup in removeDeadFrameIndices(), which already knows all frame indices being removed. This iterates over all debug operands using MI.debug_operands(). Assisted-by: Claude Code.
The LLVM Compiler Infrastructure
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called "LLVM". This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Getting the Source Code and Building LLVM
Consult the Getting Started with LLVM page for information on building and running LLVM.
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