Commit 3ba6150e authored by sewardj's avatar sewardj
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[project @ 2000-01-24 18:33:34 by sewardj]

Start a NOTES file, recording known but un-fixed nativeGen bugs.
parent 243924b8
Known bugs in nativeGen, 000124 (JRS)
All these bugs are for x86; I don't know about sparc/alpha.
-- argument marshalling for ccall is fundamentally flawed, since
it moves the C stack pointer %esp as it pushes each argument.
Alas, the register allocator spills relative to %esp and
assumes that it doesn't move. Result: if the marshalling code
for a ccall involves any spills, the resulting code will
probably be wrong.
The Right Way to fix this is to copy stuff onto the stack
without moving %esp, then adjust it immediately prior to the
call insn and un-adjust it immediately following it.
-- nofib/spectral/cvh_unboxing exposes some kind of spilling bug
(I think), since there are many references to registers %M229
etc, which I believe are dynamic registers which didn't get assigned
to real ones.
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