Problem compiling with SSE intrinsics and -O3

Dima Pasechnik
Sat May 14 03:23:00 GMT 2011

Hi Phil,
Please post the output of gcc -v.
In fact, I guess it has  little to do with Cygwin, as it looks very
much like a gcc bug,
perhaps fixed in a later version of gcc.

Showing that this is a Cygwin bug would need a check that the same
does not happen
on the same version of gcc on Linux, say.


On 14 May 2011 00:15, Morris, Philip <> wrote:
> (third try, wow you guys really don't want to receive emails !)
> Dear Sir/Madam
> I have come across a problem when trying to compile a simple program using Cygwin
> I just did a fresh install of Cygwin from the net on W7 32bit PC and included make/g++ to build my software (which builds fine on other native linux machines)
> When i try to compile the attached file i get this error
> $ gcc -msse2 -c -O3 test.c
> test.c: In function `vclrx':
> test.c:43: internal compiler error: in output_constant_pool, at varasm.c:3190
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <URL:> for instructions.
> Without the -O3 option all is well
> Help appreciated.
> Thanks
> Phil.

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