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2011 Nov 09
1
[LLVMdev] Inserting stack spilling code that modifies globally visible state
Hello,
I am developing compiler for the 8-bit PicoBlaze processor in LLVM 2.9.
The problem at hand is that the stack spilling code in this
architecture modifies the machine FLAGS register (i.e. globally
visible state). The LLVM core code does not know about this 'feature'
and happily inserts spilling code anywhere it wants, thus
(potentially) corrupting live FLAGS.
Practically, the FLAGS