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[Bug target/71245] std::atomic<double> load/store bounces the data to the stack using fild/fistp
- From: "uros at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 29 May 2016 20:51:03 +0000
- Subject: [Bug target/71245] std::atomic<double> load/store bounces the data to the stack using fild/fistp
- Auto-submitted: auto-generated
- References: <bug-71245-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71245
--- Comment #4 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun May 29 20:50:32 2016
New Revision: 236863
URL: https://gcc.gnu.org/viewcvs?rev=236863&root=gcc&view=rev
Log:
PR target/71245
* config/i386/sync.md (define_peephole2 atomic_storedi_fpu):
New peepholes to remove unneeded fild/fistp pairs.
(define_peephole2 atomic_loaddi_fpu): Ditto.
testsuite/ChangeLog:
PR target/71245
* gcc.target/i386/pr71245-1.c: New test.
* gcc.target/i386/pr71245-2.c: Ditto.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr71245-1.c
trunk/gcc/testsuite/gcc.target/i386/pr71245-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sync.md
trunk/gcc/testsuite/ChangeLog