[cfe-dev] Bitwidth attribute
ihusar at fit.vutbr.cz
Wed Jan 12 03:13:48 PST 2011
I would like to ask, whether there are any plan to support the bitwidth attribute.
In llvm-test-2.8 in SingleSource/UnitTests/Integer/bits.h, there is the attribute used:
typedef unsigned int __attribute__((bitwidth(1))) uint1;
However, when I try to compile it with clang 2.8, I get this message:
test.c:2:37: warning: unknown attribute 'bitwidth' ignored [-Wunknown-attributes]
I did not try the latest llvm-gcc, but last time i tried, it did not work either.
So, I would like to ask, whether you plan to include support for the bitwidth attribute in the close future, or if
you would be willing to accept a patch that implements this support.
We need this to describe hardware using C and I think that we are not the only ones that
would find this useful.
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