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riscv-gcc-1
Commit 6691db8e by Jan Hubicka Committed by Jan Hubicka
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flow.c (try_optimize_cfg): Delete whole chain of trivially dead basic blocks. 

	* flow.c (try_optimize_cfg): Delete whole chain of trivially dead
	basic blocks.
	(verify_flow_info): Make diagnostics prettier.

From-SVN: r43967
parent a3e5ae6d
Showing with 14 additions and 11 deletions
gcc/ChangeLog
Thu Jul 12 17:57:16 CEST 2001 Jan Hubicka <jh@suse.cz>
* flow.c (try_optimize_cfg): Delete whole chain of trivially dead
basic blocks.
(verify_flow_info): Make diagnostics prettier.
Thu Jul 12 16:48:54 CEST 2001 Jan Hubicka <jh@suse.cz>
* flow.c (find_basic_blocks_1): Do not emit NOP after call.
......
gcc/flow.c
......@@ -3653,10 +3653,10 @@ try_optimize_cfg (mode)
edge s;
int changed_here = 0;
/* Delete trivially dead basic block. */
if (b->pred == NULL)
/* Delete trivially dead basic blocks. */
while (b->pred == NULL)
{
c = BASIC_BLOCK (i - 1);
c = BASIC_BLOCK (b->index - 1);
if (rtl_dump_file)
fprintf (rtl_dump_file, "Deleting block %i.\n", b->index);
flow_delete_block (b);
......@@ -7923,23 +7923,20 @@ verify_flow_info ()
&& (e->src->index + 1 != e->dest->index
|| !can_fallthru (e->src, e->dest)))
{
fprintf (stderr,
"verify_flow_info: Incorrect fallthru edge %i->%i\n",
e->src->index, e->dest->index);
fflush (stderr);
error ("verify_flow_info: Incorrect fallthru edge %i->%i",
e->src->index, e->dest->index);
err = 1;
}
if (e->src != bb)
{
fprintf (stderr,
"verify_flow_info: Basic block %d succ edge is corrupted\n",
bb->index);
error ("verify_flow_info: Basic block %d succ edge is corrupted",
bb->index);
fprintf (stderr, "Predecessor: ");
dump_edge_info (stderr, e, 0);
fprintf (stderr, "\nSuccessor: ");
dump_edge_info (stderr, e, 1);
fflush (stderr);
fprintf (stderr, "\n");
err = 1;
}
if (e->dest != EXIT_BLOCK_PTR)
......
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