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ac7ceb3dab
Hexagon instructions are VLIW "bundles" of up to four instruction words
encoded as a single MCInst with operands for each sub-instruction.
Previously, the disassembler's getInstruction() returned the full
bundle, which made it difficult to work with llvm-objdump.
For example, since all instructions are bundles, and bundles do not
branch, branch targets could not be printed.
This patch modifies the Hexagon disassembler to return individual
sub-instructions instead of entire bundles, enabling correct printing of
branch targets and relocations. It also introduces
`MCDisassembler::getInstructionBundle` for cases where the full bundle
is still needed.
By default, llvm-objdump separates instructions with newlines. However,
this does not work well for Hexagon syntax:
{ inst1
inst2
inst3
inst4 <branch> } :endloop0
Instructions may be followed by a closing brace, a closing brace with
`:endloop`, or a newline. Branches must appear within the braces.
To address this, `PrettyPrinter::getInstructionSeparator()` is added and
overridden for Hexagon.
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.