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Since constant pools have been simplified such that they always follow the load instructions referencing them, it is now possible to copy the pool data into the main assembly buffer right away in finishPool() instead of deferring the copy to executableCopy(). This has the important effect that BufferOffset values don't need to be adjusted to account for the size of injected constant pools. - In finishPool(), copy the constant pool data into the main assembler buffer with putBytesLarge() which allows the potentially large pool data to be split over multiple slices. - Stop copying pool data in executableCopy(). It has already been copied in finishPool(). - Simplify the PoolInfo data structure to a simple (firstEntry, offset) pair which records the necessary information about a single emitted constant pool. - Rewrite poolEntryOffset() to use the new PoolInfo data. - Simplify poolSizeBefore() to just return 0. This function will be removed entirely in a followup patch. - Stop patching branches in executableCopy() and delete the patchBranch() method. Since buffer offsets are reliable when the branches are inserted and when labels are bound, there is no need to adjust branches to account for constant pools. - Delete the BufferSliceTail class. It is no longer necessary to maintain a bit vector of branch instructions since we don't rewrite branches any longer. Use the plain AssemblerBuffer::Slice class instead. This patch implements the basic functional change of copying pool data immediately instead of deferring it. Followup patches will clean up the now redundant code. --HG-- extra : rebase_source : 719225aef25dbf1b4bb7561391224b3c5f8793a5 |
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