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[Bug target/56028] Splitting a 64-bit volatile store
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 18 Jan 2013 11:09:42 +0000
- Subject: [Bug target/56028] Splitting a 64-bit volatile store
- Auto-submitted: auto-generated
- References: <bug-56028-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56028
--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2013-01-18 11:09:42 UTC ---
- Does language standard guarantee atomic store in this case [wikipedia says
"No." [1]]?
- Can a store to a volatile DImode location be implemented as two consecutive
SImode stores to adjacent location (this breaks stores of 64bit immediates to
MMIO 64bit registers)?
[1] http://en.wikipedia.org/wiki/Volatile_variable#In_C_and_C.2B.2B