This is a revised version of the patch set originally posted last November:
https://gcc.gnu.org/pipermail/gcc-patches/2019-November/534142.html In addition to generally updating and rebasing the patches to reflect other changes on mainline in the meantime, for this version I have switched to using the C lowering strategy (directly to goto form) rather than the C++ one (to LOOP_EXPR) because of regressions in the C optimization tests. Besides the ones previously noted in the original patch submission, there were a bunch of new ones since November. Some of them were trivial to fix (e.g., flipping branch probabilities to reflect the different sense of the loop exit condition in the C++-style output), but I wasn't making much progress on others and eventually decided to pursue the "plan B" of using the C-style output everywhere, as discussed here: https://gcc.gnu.org/pipermail/gcc-patches/2019-December/536536.html The only regression I ran into with this was a bootstrap failure building the Fortran front end from a new -Wmaybe-uninitialized error. This might be a false positive but part 3 of the new series works around it by adding an assertion to give g++ a hint. Unfortunately I had no luck in trying to reduce this to a standalone test case, but I did observe that the failure went away when I compiled that file with debugging enabled. :-S I could file a PR to look into this further if the workaround is good enough for now. -Sandra Sandra Loosemore (4): Move loop and switch tree data structures from cp/ to c-family/. Use C-style loop lowering instead of C++-style. Work around bootstrap failure in Fortran front end. Change C front end to emit structured loop and switch tree nodes. gcc/c-family/c-common.c | 24 ++ gcc/c-family/c-common.def | 24 ++ gcc/c-family/c-common.h | 53 +++- gcc/c-family/c-dump.c | 38 +++ gcc/c-family/c-gimplify.c | 422 ++++++++++++++++++++++++++++++++ gcc/c-family/c-pretty-print.c | 92 ++++++- gcc/c/c-decl.c | 18 +- gcc/c/c-lang.h | 3 +- gcc/c/c-objc-common.h | 2 + gcc/c/c-parser.c | 125 +++++----- gcc/c/c-tree.h | 21 +- gcc/c/c-typeck.c | 227 ++++++----------- gcc/cp/cp-gimplify.c | 469 +++++++----------------------------- gcc/cp/cp-objcp-common.c | 13 +- gcc/cp/cp-tree.def | 23 -- gcc/cp/cp-tree.h | 40 --- gcc/cp/cxx-pretty-print.c | 78 ------ gcc/cp/dump.c | 31 --- gcc/doc/generic.texi | 56 +++-- gcc/fortran/interface.c | 4 + gcc/objc/ChangeLog | 5 + gcc/objc/objc-act.c | 6 +- gcc/testsuite/gcc.dg/gomp/block-7.c | 12 +- 23 files changed, 938 insertions(+), 848 deletions(-) -- 2.8.1
