From 44dc7b0d4485f4bc300210984db4e4369a48503b Mon Sep 17 00:00:00 2001
From: Justin Seyster <jseyster@cs.sunysb.edu>
Date: Fri, 13 Aug 2010 22:30:14 -0400
Subject: [PATCH] Fixed crash when initial block has no first_stmt.

Still need to figure out how to correctly get the filename/lineno for
functions that have an entry block with no first_stmt.
---
 src/aop-duplicate.c | 13 +++++++++++--
 src/aop-pc-entry.c  | 17 +++++++++++++++--
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/src/aop-duplicate.c b/src/aop-duplicate.c
index 89d6d57..69f1913 100644
--- a/src/aop-duplicate.c
+++ b/src/aop-duplicate.c
@@ -150,8 +150,17 @@ duplicate_function_body (const char *tmpvar_name, gimple call)
   source_location orig_loc;
 
   /* Remember the source location in the original first block. */
-  cur_bb = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun);
-  orig_loc = gimple_location (first_stmt (cur_bb->next_bb));
+    {
+      basic_block bb;
+      gimple stmt;
+
+      bb = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun);
+      stmt = first_stmt (bb->next_bb);
+      if (stmt != NULL)
+	orig_loc = gimple_location (first_stmt (bb->next_bb));
+      else
+	orig_loc = 0;
+    }
 
   bb_pairs = VEC_alloc (bb_pair, gc, INITIAL_PAIRS);
   label_pairs = VEC_alloc (label_pair, heap, INITIAL_PAIRS);
diff --git a/src/aop-pc-entry.c b/src/aop-pc-entry.c
index a828a9e..f30d945 100644
--- a/src/aop-pc-entry.c
+++ b/src/aop-pc-entry.c
@@ -49,9 +49,22 @@ get_function_entry_xloc()
 {
   basic_block bb;
   expanded_location xloc;
-  
+  gimple stmt;
+
+  /* TODO: How do we figure out the line number and file number when
+     their is no first_stmt? */
   bb = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun);
-  xloc = expand_location (gimple_location (first_stmt (bb->next_bb)));
+  stmt = first_stmt (bb->next_bb);
+  if (stmt != NULL)
+    {
+      xloc = expand_location (gimple_location (stmt));
+    }
+  else
+    {
+      xloc.line = 0;
+      xloc.file = NULL;
+    }
+
   return xloc;
 }
 
-- 
2.34.1