Merge branch 'releases/gcc-12' into devel/omp/gcc-12

Merge up to r12-8640-gb2ae75fd2afc7d92f5f71748540390b7aebde4c6 (28th July 2022)

diff --cc gcc/cp/decl.cc
Simple merge

diff --cc gcc/cp/parser.cc
Simple merge

diff --cc gcc/cp/pt.cc
Simple merge

diff --cc gcc/cp/semantics.cc
Simple merge

diff --cc gcc/doc/invoke.texi
Simple merge

diff --cc gcc/fortran/openmp.cc
Simple merge

diff --cc gcc/fortran/trans-decl.cc
Simple merge

diff --cc gcc/tree-ssa-dce.cc
Simple merge