Merge of the scalar-storage-order branch.

gcc/ChangeLog

gcc/ada/ChangeLog

gcc/ada/gcc-interface/decl.c

gcc/ada/gcc-interface/gigi.h

gcc/ada/gcc-interface/trans.c

gcc/ada/gcc-interface/utils.c

gcc/ada/gcc-interface/utils2.c

gcc/asan.c

gcc/builtins.c

gcc/c-family/ChangeLog

gcc/c-family/c-common.c

gcc/c-family/c-pragma.c

gcc/c-family/c-pragma.h

gcc/c-family/c.opt

gcc/c/ChangeLog

gcc/c/c-decl.c

gcc/c/c-typeck.c

gcc/calls.c

gcc/cfgexpand.c

gcc/config/mips/mips.c