From d950dee3a50e04e4bdf03cc061f7f2b858a84657 Mon Sep 17 00:00:00 2001
From: "Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>
Date: Sat, 10 Aug 2002 12:30:34 +0000
Subject: [PATCH] emit-rtl.c (emit_jump_insn_before, [...]): Fix uninitialized
 variable.

	* emit-rtl.c (emit_jump_insn_before, emit_call_insn_before,
	emit_jump_insn): Fix uninitialized variable.
	* gcov.c (init_line_info): Likewise.
	* genautomata.c (transform_3): Add braces around ambiguous
	else.
	* ifcvt.c (cond_exec_process_insns): Mark parameter with
	ATTRIBUTE_UNUSED.
	* ra-build.c (parts_to_webs_1): Fix uninitialized variable.
	* regrename.c (copyprop_hardreg_forward): Fix uninitialized
	variable.

From-SVN: r56182
---
 gcc/ChangeLog     | 11 +++++++++++
 gcc/emit-rtl.c    |  6 +++---
 gcc/gcov.c        |  2 +-
 gcc/genautomata.c | 24 +++++++++++++-----------
 gcc/ifcvt.c       |  2 +-
 gcc/ra-build.c    |  2 +-
 gcc/regrename.c   |  2 +-
 7 files changed, 31 insertions(+), 18 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 787ae7a527a..02b40fc4de7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,16 @@
 2002-08-10  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
+	* emit-rtl.c (emit_jump_insn_before, emit_call_insn_before,
+	emit_jump_insn): Fix uninitialized variable.
+	* gcov.c (init_line_info): Likewise.
+	* genautomata.c (transform_3): Add braces around ambiguous
+	else.
+	* ifcvt.c (cond_exec_process_insns): Mark parameter with
+	ATTRIBUTE_UNUSED.
+	* ra-build.c (parts_to_webs_1): Fix uninitialized variable.
+	* regrename.c (copyprop_hardreg_forward): Fix uninitialized
+	variable.
+
 	* gengtype.c (write_gc_structure_fields): Avoid signed/unsigned
 	warnings in output files.
 
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index d8689243e98..cf138d37259 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -3974,7 +3974,7 @@ rtx
 emit_jump_insn_before (x, before)
      rtx x, before;
 {
-  rtx insn, last;
+  rtx insn, last = NULL_RTX;
 
 #ifdef ENABLE_RTL_CHECKING
   if (before == NULL_RTX)
@@ -4021,7 +4021,7 @@ rtx
 emit_call_insn_before (x, before)
      rtx x, before;
 {
-  rtx last, insn;
+  rtx last = NULL_RTX, insn;
 
 #ifdef ENABLE_RTL_CHECKING
   if (before == NULL_RTX)
@@ -4506,7 +4506,7 @@ rtx
 emit_jump_insn (x)
      rtx x;
 {
-  rtx last, insn;
+  rtx last = NULL_RTX, insn;
 
   switch (GET_CODE (x))
     {
diff --git a/gcc/gcov.c b/gcc/gcov.c
index 2c526088635..a9658b26755 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -1308,7 +1308,7 @@ init_line_info (line_info, total, maxlineno)
   char *ptr = bb_data;
   long count;
   long line_num;
-  struct line_info *line_ptr; /* line info ptr. */
+  struct line_info *line_ptr = 0; /* line info ptr. */
    
   memset (&function, 0, sizeof (function));
   if (output_function_summary)
diff --git a/gcc/genautomata.c b/gcc/genautomata.c
index 08f81734574..9fd1e836d89 100644
--- a/gcc/genautomata.c
+++ b/gcc/genautomata.c
@@ -4983,17 +4983,19 @@ transform_3 (regexp)
       max_seq_length = 0;
       if (regexp->mode == rm_allof)
 	for (i = 0; i < REGEXP_ALLOF (regexp)->regexps_num; i++)
-	  if (REGEXP_ALLOF (regexp)->regexps [i]->mode == rm_sequence)
-	    {
-	      seq = REGEXP_ALLOF (regexp)->regexps [i];
-	      if (max_seq_length < REGEXP_SEQUENCE (seq)->regexps_num)
-	      max_seq_length = REGEXP_SEQUENCE (seq)->regexps_num;
-	    }
-	  else if (REGEXP_ALLOF (regexp)->regexps [i]->mode != rm_unit)
-	    {
-	      max_seq_length = 0;
-	      break;
-	    }
+	  {
+	    if (REGEXP_ALLOF (regexp)->regexps [i]->mode == rm_sequence)
+	      {
+		seq = REGEXP_ALLOF (regexp)->regexps [i];
+		if (max_seq_length < REGEXP_SEQUENCE (seq)->regexps_num)
+		  max_seq_length = REGEXP_SEQUENCE (seq)->regexps_num;
+	      }
+	    else if (REGEXP_ALLOF (regexp)->regexps [i]->mode != rm_unit)
+	      {
+		max_seq_length = 0;
+		break;
+	      }
+	  }
       if (max_seq_length != 0)
 	{
 	  if (max_seq_length == 1 || REGEXP_ALLOF (regexp)->regexps_num <= 1)
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c
index db7140a6998..82660be612d 100644
--- a/gcc/ifcvt.c
+++ b/gcc/ifcvt.c
@@ -224,7 +224,7 @@ block_fallthru (bb)
 
 static int
 cond_exec_process_insns (ce_info, start, end, test, prob_val, mod_ok)
-     ce_if_block_t *ce_info;	/* if block information */
+     ce_if_block_t *ce_info ATTRIBUTE_UNUSED;	/* if block information */
      rtx start;			/* first insn to look at */
      rtx end;			/* last insn to look at */
      rtx test;			/* conditional execution test */
diff --git a/gcc/ra-build.c b/gcc/ra-build.c
index a7351f20037..87683cb9c02 100644
--- a/gcc/ra-build.c
+++ b/gcc/ra-build.c
@@ -1815,7 +1815,7 @@ parts_to_webs_1 (df, copy_webs, all_refs)
   webnum = 0;
   for (i = 0; i < def_id + use_id; i++)
     {
-      struct web *web, *subweb;
+      struct web *subweb, *web = 0; /* Initialize web to silence warnings.  */
       struct web_part *wp = &web_parts[i];
       struct ref *ref = wp->ref;
       unsigned int ref_id;
diff --git a/gcc/regrename.c b/gcc/regrename.c
index 62629f0a4cb..5a80a90eb83 100644
--- a/gcc/regrename.c
+++ b/gcc/regrename.c
@@ -1780,7 +1780,7 @@ copyprop_hardreg_forward ()
 {
   struct value_data *all_vd;
   bool need_refresh;
-  basic_block bb, bbp;
+  basic_block bb, bbp = 0;
 
   need_refresh = false;