[Bug c++/54988] fpmath=sse target pragma causes inlining failure because of target specific option mismatch
thiago at kde dot org
gcc-bugzilla@gcc.gnu.org
Mon Oct 22 14:43:00 GMT 2012
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54988
--- Comment #3 from Thiago Macieira <thiago at kde dot org> 2012-10-22 14:43:11 UTC ---
This might be as I pointed out in
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54231:
(Node "Function attributes"):
On the 386/x86_64 and PowerPC backends, the inliner will not
inline a function that has different target options than the
caller, unless the callee has a subset of the target options of
the caller. For example a function declared with `target("sse3")'
can inline a function with `target("sse2")', since `-msse3'
implies `-msse2'.
My guess was that we were forcing the inlining (via always_inline) of a
function that has different target options.
But I guess that doesn't explain why it happens only in C++ and only in
optimising mode. Does always_inline inline on -O0 too?
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