Changes

Summary

Test commit to check access. (details)
[CMake] Installable find modules for terminfo and libffi (details)
[lld-macho] Unreferenced weak dylib symbols shouldn't fetch archive symbols (details)
[GlobalISel] Allow DBG_VALUE to use undefined vregs before LiveDebugValues. (details)

Commit 296ebeb808a71e44a64e0f805cffc6e3a3bf6182 by jackoalan Test commit to check access.
	clang/lib/Driver/Driver.cpp
Commit b66339575a9b541e67ce5ad2ba7e88da07cf9305 by jackoalan [CMake] Installable find modules for terminfo and libffi Improves cross-distro portability of LLVM cmake package by resolving paths for terminfo and libffi via import targets. When LLVMExports.cmake is generated for installation, it contains absolute library paths which are likely to be a common cause of portability issues. To mitigate this, the discovery logic for these dependencies is refactored into find modules which get installed alongside LLVMConfig.cmake. The result is cleaner, cmake-friendly management of these dependencies that respect the environment of the LLVM package importer. Reviewed By: JDevlieghere Differential Revision: https://reviews.llvm.org/D114327
	llvm/cmake/modules/FindFFI.cmake
	llvm/cmake/config-ix.cmake
	llvm/cmake/modules/FindTerminfo.cmake
	llvm/cmake/modules/LLVMConfig.cmake.in
	llvm/lib/Support/CMakeLists.txt
	llvm/lib/ExecutionEngine/Interpreter/CMakeLists.txt
Commit 1b44364714981017302f182583a43fda4d28e0eb by jezng [lld-macho] Unreferenced weak dylib symbols shouldn't fetch archive symbols We were fetching archive symbols too eagerly, bloating binary size as well as just screwing up binaries that expected to look up certain symbols only at runtime. Reviewed By: #lld-macho, oontvoo Differential Revision: https://reviews.llvm.org/D115092
	lld/test/MachO/weak-definition-direct-fetch.s
	lld/MachO/SymbolTable.cpp
Commit f108c7f59dfae5fafbb00fbdef7a0cd31826dcfc by jackoalan [GlobalISel] Allow DBG_VALUE to use undefined vregs before LiveDebugValues. Expanding on D109750. Since `DBG_VALUE` instructions have final register validity determined in `LDVImpl::handleDebugValue`, there is no apparent reason to immediately prune unused register operands as their defs are erased. Consequently, this renders `MachineInstr::eraseFromParentAndMarkDBGValuesForRemoval` moot; gaining a substantial performance improvement. The only necessary changes involve making relevant passes consider invalid DBG_VALUE vregs uses as valid. Reviewed By: MatzeB Differential Revision: https://reviews.llvm.org/D112852
	llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
	llvm/lib/CodeGen/LiveDebugVariables.h
	llvm/include/llvm/CodeGen/MachineFunction.h
	llvm/test/CodeGen/AArch64/GlobalISel/select-dbg-value.mir
	llvm/test/CodeGen/AArch64/GlobalISel/uaddo-8-16-bits.mir
	llvm/include/llvm/CodeGen/MIRYamlMapping.h
	llvm/lib/CodeGen/GlobalISel/Utils.cpp
	llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
	llvm/lib/CodeGen/LiveDebugVariables.cpp
	llvm/test/MachineVerifier/verify-selected-dbg-undef-use.mir
	llvm/test/CodeGen/AMDGPU/fold-readlane.mir
	llvm/lib/CodeGen/MachineInstr.cpp
	llvm/lib/CodeGen/MIRPrinter.cpp
	llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
	llvm/lib/CodeGen/MachineVerifier.cpp
	llvm/lib/CodeGen/DeadMachineInstructionElim.cpp
	llvm/test/CodeGen/X86/GlobalISel/x86-calllowering-dbg-trunc.ll
	llvm/lib/CodeGen/MIRParser/MIRParser.cpp
	llvm/test/CodeGen/Generic/live-debug-vars-undef-use.mir
	llvm/lib/Target/NVPTX/NVPTXPeephole.cpp
	llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
	llvm/test/MachineVerifier/verify-regbankselected-dbg-undef-use.mir
	llvm/lib/CodeGen/GlobalISel/Combiner.cpp
	llvm/include/llvm/CodeGen/MachineInstr.h
	llvm/lib/CodeGen/MachineCombiner.cpp
	llvm/lib/CodeGen/MachineFunction.cpp