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| 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/tree.def | |
| 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/tree.def')
| -rw-r--r-- | gcc/tree.def | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/tree.def b/gcc/tree.def index 10a14fc..d2e6938 100644 --- a/gcc/tree.def +++ b/gcc/tree.def @@ -908,7 +908,14 @@ DEFTREECODE (TRY_CATCH_EXPR, "try_catch_expr", tcc_statement, 2) /* Evaluate the first operand. The second operand is a cleanup expression which is evaluated on any exit (normal, exception, or jump out) from this expression. */ -DEFTREECODE (TRY_FINALLY_EXPR, "try_finally", tcc_statement, 2) +DEFTREECODE (TRY_FINALLY_EXPR, "try_finally_expr", tcc_statement, 2) + +/* Evaluate either the normal or the exceptional cleanup. This must + only be present as the cleanup expression in a TRY_FINALLY_EXPR. + If the TRY_FINALLY_EXPR completes normally, the first operand of + EH_ELSE_EXPR is used as a cleanup, otherwise the second operand is + used. */ +DEFTREECODE (EH_ELSE_EXPR, "eh_else_expr", tcc_statement, 2) /* These types of expressions have no useful value, and always have side effects. */ |