PR bootstrap/79033 - asan.c not compiling with make BOOT_CFLAGS=-O0

gcc/ChangeLog:
	* asan.c (asan_emit_stack_protection): Increase local buffer size
	to avoid snprintf truncation warning.

From-SVN: r244237

gcc/ChangeLog

+2017-01-09  Martin Sebor  <msebor@redhat.com>
+
+	PR bootstrap/79033
+	* asan.c (asan_emit_stack_protection): Increase local buffer size
+	to avoid snprintf truncation warning.
+
 2017-01-09  Andrew Pinski  <apinski@cavium.com>
 
 	* config/aarch64/aarch64-cores.def: Add thunderx2t99.  Change vulcan

gcc/asan.c

@@ -1068,7 +1068,7 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned int alignb,
   rtx shadow_base, shadow_mem, ret, mem, orig_base;
   rtx_code_label *lab;
   rtx_insn *insns;
-  char buf[30];
+  char buf[32];
   unsigned char shadow_bytes[4];
   HOST_WIDE_INT base_offset = offsets[length - 1];
   HOST_WIDE_INT base_align_bias = 0, offset, prev_offset;