On Jul 4, 2019, Richard Biener <richard.guent...@gmail.com> wrote:
> Yeah. For other stuff we're simply looking at CPP_NAME and
> string-matching, see c_parser_gimple_compound_statement
> where you'd probably hook this into.
Here's a working patch that introduces try/finally[/else] in gimplefe.
Regstrapped on x86_64-linux-gnu. Ok to install?
introduce try/finally/else in gimplefe
for gcc/c/ChangeLog
* gimple-parser.c (c_parser_gimple_try_stmt): New.
(c_parser_compound_statement): Call it.
for gcc/testsuite/ChangeLog
* gcc.dg/gimplefe-43.c: New.
---
gcc/c/gimple-parser.c | 61 ++++++++++++++++++++++++++++++++++++
gcc/testsuite/gcc.dg/gimplefe-43.c | 25 +++++++++++++++
2 files changed, 86 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/gimplefe-43.c
diff --git a/gcc/c/gimple-parser.c b/gcc/c/gimple-parser.c
index a0ea7215984a..4970ae1e9e08 100644
--- a/gcc/c/gimple-parser.c
+++ b/gcc/c/gimple-parser.c
@@ -117,6 +117,7 @@ static struct c_expr
c_parser_gimple_postfix_expression_after_primary
static void c_parser_gimple_declaration (gimple_parser &);
static void c_parser_gimple_goto_stmt (gimple_parser &, location_t,
tree, gimple_seq *);
+static void c_parser_gimple_try_stmt (gimple_parser &, gimple_seq *);
static void c_parser_gimple_if_stmt (gimple_parser &, gimple_seq *);
static void c_parser_gimple_switch_stmt (gimple_parser &, gimple_seq *);
static void c_parser_gimple_return_stmt (gimple_parser &, gimple_seq *);
@@ -407,6 +408,9 @@ c_parser_gimple_compound_statement (gimple_parser &parser,
gimple_seq *seq)
case CPP_KEYWORD:
switch (c_parser_peek_token (parser)->keyword)
{
+ case RID_AT_TRY:
+ c_parser_gimple_try_stmt (parser, seq);
+ break;
case RID_IF:
c_parser_gimple_if_stmt (parser, seq);
break;
@@ -448,6 +452,14 @@ c_parser_gimple_compound_statement (gimple_parser &parser,
gimple_seq *seq)
c_parser_gimple_label (parser, seq);
break;
}
+ if (c_parser_next_token_is (parser, CPP_NAME)
+ && c_parser_peek_token (parser)->id_kind == C_ID_ID
+ && strcmp (IDENTIFIER_POINTER (c_parser_peek_token
(parser)->value),
+ "try") == 0)
+ {
+ c_parser_gimple_try_stmt (parser, seq);
+ break;
+ }
/* Basic block specification.
__BB (index, ...) */
if ((cfun->curr_properties & PROP_cfg)
@@ -2092,6 +2104,55 @@ c_parser_gimple_paren_condition (gimple_parser &parser)
return cond;
}
+/* Parse gimple try statement.
+
+ try-statement:
+ try { ... } finally { ... }
+ try { ... } finally { ... } else { ... }
+
+ This could support try/catch as well, but it's not implemented yet.
+ */
+
+static void
+c_parser_gimple_try_stmt (gimple_parser &parser, gimple_seq *seq)
+{
+ gimple_seq tryseq = NULL;
+ c_parser_consume_token (parser);
+ c_parser_gimple_compound_statement (parser, &tryseq);
+
+ if ((c_parser_next_token_is (parser, CPP_KEYWORD)
+ && c_parser_peek_token (parser)->keyword == RID_AT_FINALLY)
+ || (c_parser_next_token_is (parser, CPP_NAME)
+ && c_parser_peek_token (parser)->id_kind == C_ID_ID
+ && strcmp (IDENTIFIER_POINTER (c_parser_peek_token (parser)->value),
+ "finally") == 0))
+ {
+ gimple_seq finseq = NULL;
+ c_parser_consume_token (parser);
+ c_parser_gimple_compound_statement (parser, &finseq);
+
+ if (c_parser_next_token_is (parser, CPP_KEYWORD)
+ && c_parser_peek_token (parser)->keyword == RID_ELSE)
+ {
+ gimple_seq elsseq = NULL;
+ c_parser_consume_token (parser);
+ c_parser_gimple_compound_statement (parser, &elsseq);
+
+ geh_else *stmt = gimple_build_eh_else (finseq, elsseq);
+ finseq = NULL;
+ gimple_seq_add_stmt_without_update (&finseq, stmt);
+ }
+
+ gtry *stmt = gimple_build_try (tryseq, finseq, GIMPLE_TRY_FINALLY);
+ gimple_seq_add_stmt_without_update (seq, stmt);
+ }
+ else if (c_parser_next_token_is (parser, CPP_KEYWORD)
+ && c_parser_peek_token (parser)->keyword == RID_AT_CATCH)
+ c_parser_error (parser, "%<catch%> is not supported");
+ else
+ c_parser_error (parser, "expected %<finally%> or %<catch%>");
+}
+
/* Parse gimple if-else statement.
if-statement:
diff --git a/gcc/testsuite/gcc.dg/gimplefe-43.c
b/gcc/testsuite/gcc.dg/gimplefe-43.c
new file mode 100644
index 000000000000..5fd66e6dfa5c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/gimplefe-43.c
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-options "-fgimple" } */
+
+void __GIMPLE foo()
+{
+ try
+ {
+ try
+ {
+ ;
+ }
+ finally
+ {
+ ;
+ }
+ else
+ {
+ ;
+ }
+ }
+ finally
+ {
+ ;
+ }
+}
--
Alexandre Oliva, freedom fighter he/him https://FSFLA.org/blogs/lxo
Be the change, be Free! FSF Latin America board member
GNU Toolchain Engineer Free Software Evangelist
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