@whitequark Replace "C" by your favorite HLL. Same principle applies.
@whitequark For example, using temp regs or introducing spills breaks clobber contracts or ability to run with no stack.
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@whitequark Reordering insns breaks otherwise well-defined async code (interrupt/signal handler) like pre-armv6 kuser atomics. -
@RichFelker I contend that the range of transformations is quite limited, probably limited enough to not be useful in practice ever
End of conversation
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