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Thumb-1 only allows SP-based LDR and STR to be word-sized, and SP-base LDR, STR, and ADD only allow offsets that are a multiple of 4. Make some changes to better make use of these instructions: * Use word loads for anyext byte and halfword loads from the stack. * Enforce 4-byte alignment on objects accessed in this way, to ensure that the offset is valid. * Do the same for objects whose frame index is used, in order to avoid having to use more than one ADD to generate the frame index. * Correct how many bits of offset we think AddrModeT1_s has. Patch by John Brawn. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230496 91177308-0d34-0410-b5e6-96231b3b80d8
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you're writing a package for LLVM, see docs/Packaging.rst for our suggestions.