diff options
| author | Alexandre Oliva <oliva@adacore.com> | 2019-07-04 15:00:00 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2019-07-04 15:00:00 +0000 |
| commit | ebebc928d8b0d17676e751848892f927373b1fe5 (patch) | |
| tree | 5b00c4867b3d58dc4865627ffab29da1e0baa2d0 /gcc/except.c | |
| parent | e57c896e86c4257741b574d99d7cacbfda219755 (diff) | |
| download | gcc-ebebc928d8b0d17676e751848892f927373b1fe5.zip gcc-ebebc928d8b0d17676e751848892f927373b1fe5.tar.gz gcc-ebebc928d8b0d17676e751848892f927373b1fe5.tar.bz2 | |
introduce EH_ELSE_EXPR tree and gimplifier
I found GIMPLE_EH_ELSE offered exactly the semantics I needed for some
Ada changes yet to be contributed, but GIMPLE_EH_ELSE was only built
by GIMPLE passes, and I needed to build earlier something that
eventually became GIMPLE_EH_ELSE.
This patch does that, introducing an EH_ELSE_EXPR tree, and logic to
dump it and to gimplify it.
for gcc/ChangeLog
* doc/generic.texi (Cleanups): Document EH_ELSE_EXPR.
* except.c: Likewise.
* expr.c (expand_expr_real_1): Reject it.
* gimplify.c (gimplify_expr): Gimplify it, within
TRY_FINALLY_EXPR.
* tree-dump.c (dequeue_and_dump): Dump it.
* tree-pretty-print.c (dump_generic_node): Likewise.
* tree.c (block_may_fallthru): Handle it.
* tree.def (EH_ELSE_EXPR): Introduce it.
* gimple-pretty-print.c (dump_gimple_try): Dump TRY_FINALLY
with GIMPLE_EH_ELSE as try/finally/else.
From-SVN: r273084
Diffstat (limited to 'gcc/except.c')
| -rw-r--r-- | gcc/except.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/gcc/except.c b/gcc/except.c index edaeeb4..29f3339 100644 --- a/gcc/except.c +++ b/gcc/except.c @@ -27,14 +27,14 @@ along with GCC; see the file COPYING3. If not see the compilation process: In the beginning, in the front end, we have the GENERIC trees - TRY_CATCH_EXPR, TRY_FINALLY_EXPR, WITH_CLEANUP_EXPR, + TRY_CATCH_EXPR, TRY_FINALLY_EXPR, EH_ELSE_EXPR, WITH_CLEANUP_EXPR, CLEANUP_POINT_EXPR, CATCH_EXPR, and EH_FILTER_EXPR. - During initial gimplification (gimplify.c) these are lowered - to the GIMPLE_TRY, GIMPLE_CATCH, and GIMPLE_EH_FILTER nodes. - The WITH_CLEANUP_EXPR and CLEANUP_POINT_EXPR nodes are converted - into GIMPLE_TRY_FINALLY nodes; the others are a more direct 1-1 - conversion. + During initial gimplification (gimplify.c) these are lowered to the + GIMPLE_TRY, GIMPLE_CATCH, GIMPLE_EH_ELSE, and GIMPLE_EH_FILTER + nodes. The WITH_CLEANUP_EXPR and CLEANUP_POINT_EXPR nodes are + converted into GIMPLE_TRY_FINALLY nodes; the others are a more + direct 1-1 conversion. During pass_lower_eh (tree-eh.c) we record the nested structure of the TRY nodes in EH_REGION nodes in CFUN->EH->REGION_TREE. |