re PR sanitizer/60142 ([asan] -fsanitize=address breaks debugging - stepping…

re PR sanitizer/60142 ([asan] -fsanitize=address breaks debugging - stepping into functions no longer possible)

	PR sanitizer/60142
	* final.c (SEEN_BB): Remove.
	(SEEN_NOTE, SEEN_EMITTED): Renumber.
	(final_scan_insn): Don't force_source_line on second
	NOTE_INSN_BASIC_BLOCK.

From-SVN: r207853

gcc/ChangeLog

+2014-02-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR sanitizer/60142
+	* final.c (SEEN_BB): Remove.
+	(SEEN_NOTE, SEEN_EMITTED): Renumber.
+	(final_scan_insn): Don't force_source_line on second
+	NOTE_INSN_BASIC_BLOCK.
+
 2014-02-18  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/60205

gcc/final.c

@@ -112,9 +112,8 @@ along with GCC; see the file COPYING3.  If not see
 #endif
 
 /* Bitflags used by final_scan_insn.  */
-#define SEEN_BB		1
-#define SEEN_NOTE	2
-#define SEEN_EMITTED	4
+#define SEEN_NOTE	1
+#define SEEN_EMITTED	2
 
 /* Last insn processed by final_scan_insn.  */
 static rtx debug_insn;
@@ -2128,9 +2127,7 @@ call_from_call_insn (rtx insn)
 
    SEEN is used to track the end of the prologue, for emitting
    debug information.  We force the emission of a line note after
-   both NOTE_INSN_PROLOGUE_END and NOTE_INSN_FUNCTION_BEG, or
-   at the beginning of the second basic block, whichever comes
-   first.  */
+   both NOTE_INSN_PROLOGUE_END and NOTE_INSN_FUNCTION_BEG.  */
 
 rtx
 final_scan_insn (rtx insn, FILE *file, int optimize_p ATTRIBUTE_UNUSED,
@@ -2189,14 +2186,6 @@ final_scan_insn (rtx insn, FILE *file, int optimize_p ATTRIBUTE_UNUSED,
 	  if (targetm.asm_out.unwind_emit)
 	    targetm.asm_out.unwind_emit (asm_out_file, insn);
 
-	  if ((*seen & (SEEN_EMITTED | SEEN_BB)) == SEEN_BB)
-	    {
-	      *seen |= SEEN_EMITTED;
-	      force_source_line = true;
-	    }
-	  else
-	    *seen |= SEEN_BB;
-
           discriminator = NOTE_BASIC_BLOCK (insn)->discriminator;
 
 	  break;