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[Bug tree-optimization/79737] [7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu (in both 32-bit and 64-bit modes)
- 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, 28 Feb 2017 08:11:51 +0000
- Subject: [Bug tree-optimization/79737] [7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu (in both 32-bit and 64-bit modes)
- Auto-submitted: auto-generated
- References: <bug-79737-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79737
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The stored values are 0x1400ffffffd80005 which very much shows like that
(unsigned long long) (-5U << 19) (starting at bit 19) overflows into the fields
above it. Looking into this.