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[Bug rtl-optimization/65078] [5 Regression] 4.9 and 5.0 generate more spill-fill in comparison with 4.8.2
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 17 Mar 2015 10:33:27 +0000
- Subject: [Bug rtl-optimization/65078] [5 Regression] 4.9 and 5.0 generate more spill-fill in comparison with 4.8.2
- Auto-submitted: auto-generated
- References: <bug-65078-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65078
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |glisse at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, I have managed to reproduce it, but only if it is preprocessed with each
compiler separately. Seems it is the _mm_storel_epi64 change from r217608 that
matters here, if I use the pre-r217608 content of that inline function, I get
25 %esp references with all compilers I've tried, with r217608 or later
_mm_storel_epi64 I get 75 %esp references even with 4.8.