2e12e47a2b
When a string literal is used in a context where it needs to be wider than
it is it will get left-padded with null-bytes. When the vlog95 backend
emits the string literal it will strip the leading null-bytes as it results
in much more legible code.
Unfortunately there are some corner cases where this results in a change of
behavior of the generated code compared to the original. E.g. if the
context that caused the width expansion has been removed by optimization.
`$display(0 ? "Yes" : "No")` should print " No" due to width expansion, but
when running through the vlog95 backend it will print "No".
Another scenario where there is a change in behavior is when a null byte
was explicitly added at the front of a string literal. E.g. $bits("\000ab")
should print 24, but will print 16 when running through the vlog95 backend.
To mitigate this remove the stripping of the leading null-bytes from the
vlog95 backend. This results in slightly less legible code being generated
in some cases, but makes sure that the code is always correct.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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| .. | ||
| Makefile.in | ||
| cppcheck.sup | ||
| event.c | ||
| expr.c | ||
| logic_lpm.c | ||
| misc.c | ||
| numbers.c | ||
| scope.c | ||
| stmt.c | ||
| udp.c | ||
| vlog95-s.conf | ||
| vlog95.c | ||
| vlog95.conf | ||
| vlog95_priv.h | ||