This avoids segfaulting in the GIMPLE parser on invalid input.
Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
Richard.
2019-10-28 Richard Biener <rguent...@suse.de>
PR c/92249
* gimple-parser.c (c_parser_parse_gimple_body): Make
current_bb the entry block initially to easier recover
from errors.
(c_parser_gimple_compound_statement): Adjust.
Index: gcc/c/gimple-parser.c
===================================================================
--- gcc/c/gimple-parser.c (revision 277504)
+++ gcc/c/gimple-parser.c (working copy)
@@ -235,6 +235,7 @@ c_parser_parse_gimple_body (c_parser *cp
/* We have at least cdil_gimple_cfg. */
gimple_register_cfg_hooks ();
init_empty_tree_cfg ();
+ parser.current_bb = ENTRY_BLOCK_PTR_FOR_FN (cfun);
/* Initialize the bare loop structure - we are going to only
mark headers and leave the rest to fixup. */
set_loops_for_fn (cfun, ggc_cleared_alloc<struct loops> ());
@@ -594,7 +595,7 @@ c_parser_gimple_compound_statement (gimp
if (last_basic_block_for_fn (cfun) <= index)
last_basic_block_for_fn (cfun) = index + 1;
n_basic_blocks_for_fn (cfun)++;
- if (!parser.current_bb)
+ if (parser.current_bb->index == ENTRY_BLOCK)
parser.push_edge (ENTRY_BLOCK, bb->index, EDGE_FALLTHRU,
profile_probability::always ());
