https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61296
--- Comment #16 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> --- Author: hjl Date: Wed Dec 17 14:22:57 2014 New Revision: 218818 URL: https://gcc.gnu.org/viewcvs?rev=218818&root=gcc&view=rev Log: Add -malign-data={abi|compat|cachineline} Add -malign-data={abi|compat,cachineline} to control how GCC aligns variables. "compat" uses increased alignment value compatible with GCC 4.8 and earlier, "abi" uses alignment value as specified by the psABI, and "cacheline" uses increased alignment value to match the cache line size. "compat" is the default. gcc/ PR target/61296 * config/i386/i386-opts.h (ix86_align_data): New enum. * config/i386/i386.c (ix86_data_alignment): Return the ABI alignment value for -malign-data=abi, the cachine line size for -malign-data=cachineline and the older GCC compatible alignment value for for -malign-data=compat. * config/i386/i386.opt (malign-data=): New. * doc/invoke.texi: Document -malign-data=. gcc/testsuite/ PR target/61296 * gcc.target/i386/pr61296-2.c: New. * gcc.target/i386/pr61296-2.c: Likewise. * gcc.target/i386/pr61296-3.c: Likewise. * gcc.target/i386/pr61296-4.c: Likewise. * gcc.target/i386/pr61296-5.c: Likewise. * gcc.target/i386/pr61296-6.c: Likewise. * gcc.target/i386/pr61296-7.c: Likewise. Added: trunk/gcc/testsuite/gcc.target/i386/pr61296-1.c trunk/gcc/testsuite/gcc.target/i386/pr61296-2.c trunk/gcc/testsuite/gcc.target/i386/pr61296-3.c trunk/gcc/testsuite/gcc.target/i386/pr61296-4.c trunk/gcc/testsuite/gcc.target/i386/pr61296-5.c trunk/gcc/testsuite/gcc.target/i386/pr61296-6.c trunk/gcc/testsuite/gcc.target/i386/pr61296-7.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/i386-opts.h trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.opt trunk/gcc/doc/invoke.texi trunk/gcc/testsuite/ChangeLog