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

Merged up to commit e748398b3ef6412ef35b85ef6b0893809aeb49cd (1st July 2022).

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

diff --cc gcc/cp/decl2.cc
Simple merge

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

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

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

diff --cc gcc/dwarf2out.cc
Simple merge

diff --cc gcc/expr.cc
Simple merge

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

diff --cc gcc/tree-loop-distribution.cc
Simple merge

diff --cc gcc/tree-vect-stmts.cc
Simple merge

diff --cc gcc/tree.cc
Simple merge

diff --cc libgomp/configure
Simple merge

diff --cc libgomp/libgomp.h
Simple merge

diff --cc libgomp/libgomp.texi
Simple merge