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[Bug middle-end/81478] By default, GCC emits a function call for complex multiplication, should partially inline that
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 19 Jul 2017 10:13:20 +0000
- Subject: [Bug middle-end/81478] By default, GCC emits a function call for complex multiplication, should partially inline that
- Auto-submitted: auto-generated
- References: <bug-81478-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81478
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-07-19
Summary|By default, GCC emits a |By default, GCC emits a
|function call for complex |function call for complex
|multiplication |multiplication, should
| |partially inline that
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. It shouldn't be very difficult to do,
gcc/tree-complex.c:expand_complex_multiplication would need to emit if
(isnan(rr) || isnan(ri)) <expand_complex_libcall>.
Unless we want to optimize the corner case futher by skipping the
multiplication
in the libcall in which case we need a new entry in libgcc.
Note that the same optimization applies to division.