From patchwork Mon Oct 29 12:06:01 2012
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Subject: PATCH: Correct alloca length in dump_gimple_bb_header
Date: Mon, 29 Oct 2012 02:06:01 -0000
From: "H.J. Lu" <hjl.tools@gmail.com>
X-Patchwork-Id: 194989
Message-Id: <20121029120601.GA19039@gmail.com>
To: gcc-patches@gcc.gnu.org

Hi,

When indent == 0, we call alloca with -1 bytes.  This patch changes
it to indent + 1.  This is a trunk only regression.  OK to install?

Thanks.


H.J.

---
2012-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* gimple-pretty-print.c (dump_gimple_bb_header): Correct alloca
	length.

diff --git a/gcc/gimple-pretty-print.c b/gcc/gimple-pretty-print.c
index 4b3235e..62c315e 100644
--- a/gcc/gimple-pretty-print.c
+++ b/gcc/gimple-pretty-print.c
@@ -2093,7 +2093,7 @@ dump_gimple_bb_header (FILE *outf, basic_block bb, int indent, int flags)
       gimple stmt = first_stmt (bb);
       if (!stmt || gimple_code (stmt) != GIMPLE_LABEL)
 	{
-	  char *s_indent = (char *) alloca ((size_t) indent - 2 + 1);
+	  char *s_indent = (char *) alloca ((size_t) indent + 1);
 	  memset (s_indent, ' ', (size_t) indent);
 	  s_indent[indent] = '\0';
 	  fprintf (outf, "%s<bb %d>:\n", s_indent, bb->index);