* tree-ssa-pre.c (my_rev_post_order_compute): Remove set but not

	used count variable.
	* genemit.c (gen_expand, gen_split): Avoid set but not used warnings
	when operandN variables aren't used in the body of the expander
	or splitter.
	* tree-outof-ssa.c (FOR_EACH_ELIM_GRAPH_SUCC,
	FOR_EACH_ELIM_GRAPH_PRED): Avoid set but not used warnings.
	* tree-ssa-operands.h (FOR_EACH_SSA_TREE_OPERAND): Likewise.
	* tree-flow.h (FOR_EACH_IMM_USE_FAST, FOR_EACH_IMM_USE_STMT,
	FOR_EACH_IMM_USE_ON_STMT): Likewise.
	* tree.h (FOR_EACH_CONSTRUCTOR_ELT): Likewise.
	* tree.c (PROCESS_ARG): Likewise.
fortran/
	* parse.c (parse_derived, parse_enum): Avoid set but not used
	warning.
java/
	* expr.c (process_jvm_instruction): Avoid set but not used warning.
	* builtins.c (compareAndSwapInt_builtin, compareAndSwapLong_builtin,
	getVolatile_builtin): Likewise.
libjava/
	* exception.cc (_Jv_Throw): Avoid set but not used warning.
	* include/java-assert.h (JvAssertMessage, JvAssert): Use argument in
	sizeof to avoid set but not used warnings.
libjava/classpath/
	* native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c
	(Java_gnu_javax_sound_midi_alsa_AlsaPortDevice_run_1receiver_1thread_1):
	Avoid set but not used warning.
libiberty/
	* regex.c (byte_re_match_2_internal): Avoid set but not used
	warning.
gcc/testsuite/
	* gcc.dg/builtin-choose-expr.c: Avoid set but not used warnings.
	* gcc.dg/trunc-1.c: Likewise.
	* gcc.dg/vla-9.c: Likewise.
	* gcc.dg/dfp/composite-type.c: Likewise.
libffi/
	* testsuite/libffi.call/err_bad_abi.c: Remove unused args variable.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158084 138bc75d-0d04-0410-961f-82ee72b054a4

26 files changed, 118 insertions, 83 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2a6c5938422..1f32f76d46f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,18 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* tree-ssa-pre.c (my_rev_post_order_compute): Remove set but not
+	used count variable.
+	* genemit.c (gen_expand, gen_split): Avoid set but not used warnings
+	when operandN variables aren't used in the body of the expander
+	or splitter.
+	* tree-outof-ssa.c (FOR_EACH_ELIM_GRAPH_SUCC,
+	FOR_EACH_ELIM_GRAPH_PRED): Avoid set but not used warnings.
+	* tree-ssa-operands.h (FOR_EACH_SSA_TREE_OPERAND): Likewise.
+	* tree-flow.h (FOR_EACH_IMM_USE_FAST, FOR_EACH_IMM_USE_STMT,
+	FOR_EACH_IMM_USE_ON_STMT): Likewise.
+	* tree.h (FOR_EACH_CONSTRUCTOR_ELT): Likewise.
+	* tree.c (PROCESS_ARG): Likewise.
+
 2010-04-07  Simon Baldwin  <simonb@google.com>
 
 	* diagnostic.h (diagnostic_override_option_index): New macro to
diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 1f46730e929..795eeb53296 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* parse.c (parse_derived, parse_enum): Avoid set but not used
+	warning.
+
 2010-04-07  Janne Blomqvist  <jb@gcc.gnu.org>
 
 	PR fortran/40539
diff --git a/gcc/fortran/parse.c b/gcc/fortran/parse.c
index 190148c24ee..ef8931d2a2c 100644
--- a/gcc/fortran/parse.c
+++ b/gcc/fortran/parse.c
@@ -1968,14 +1968,12 @@ parse_derived_contains (void)
 static void
 parse_derived (void)
 {
-  int compiling_type, seen_private, seen_sequence, seen_component, error_flag;
+  int compiling_type, seen_private, seen_sequence, seen_component;
   gfc_statement st;
   gfc_state_data s;
   gfc_symbol *sym;
   gfc_component *c;
 
-  error_flag = 0;
-
   accept_statement (ST_DERIVED_DECL);
   push_state (&s, COMP_DERIVED, gfc_new_block);
 
@@ -2002,18 +2000,15 @@ parse_derived (void)
 
 	case ST_FINAL:
 	  gfc_error ("FINAL declaration at %C must be inside CONTAINS");
-	  error_flag = 1;
 	  break;
 
 	case ST_END_TYPE:
 endType:
 	  compiling_type = 0;
 
-	  if (!seen_component
-	      && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Derived type "
-				 "definition at %C without components")
-		  == FAILURE))
-	    error_flag = 1;
+	  if (!seen_component)
+	    gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Derived type "
+			    "definition at %C without components");
 
 	  accept_statement (ST_END_TYPE);
 	  break;
@@ -2023,7 +2018,6 @@ endType:
 	    {
 	      gfc_error ("PRIVATE statement in TYPE at %C must be inside "
 			 "a MODULE");
-	      error_flag = 1;
 	      break;
 	    }
 
@@ -2031,15 +2025,11 @@ endType:
 	    {
 	      gfc_error ("PRIVATE statement at %C must precede "
 			 "structure components");
-	      error_flag = 1;
 	      break;
 	    }
 
 	  if (seen_private)
-	    {
-	      gfc_error ("Duplicate PRIVATE statement at %C");
-	      error_flag = 1;
-	    }
+	    gfc_error ("Duplicate PRIVATE statement at %C");
 
 	  s.sym->component_access = ACCESS_PRIVATE;
 
@@ -2052,7 +2042,6 @@ endType:
 	    {
 	      gfc_error ("SEQUENCE statement at %C must precede "
 			 "structure components");
-	      error_flag = 1;
 	      break;
 	    }
 
@@ -2063,7 +2052,6 @@ endType:
 	  if (seen_sequence)
 	    {
 	      gfc_error ("Duplicate SEQUENCE statement at %C");
-	      error_flag = 1;
 	    }
 
 	  seen_sequence = 1;
@@ -2072,14 +2060,12 @@ endType:
 	  break;
 
 	case ST_CONTAINS:
-	  if (gfc_notify_std (GFC_STD_F2003,
-			      "Fortran 2003:  CONTAINS block in derived type"
-			      " definition at %C") == FAILURE)
-	    error_flag = 1;
+	  gfc_notify_std (GFC_STD_F2003,
+			  "Fortran 2003:  CONTAINS block in derived type"
+			  " definition at %C");
 
 	  accept_statement (ST_CONTAINS);
-	  if (parse_derived_contains ())
-	    error_flag = 1;
+	  parse_derived_contains ();
 	  goto endType;
 
 	default:
@@ -2138,14 +2124,11 @@ endType:
 static void
 parse_enum (void)
 {
-  int error_flag;
   gfc_statement st;
   int compiling_enum;
   gfc_state_data s;
   int seen_enumerator = 0;
 
-  error_flag = 0;
-
   push_state (&s, COMP_ENUM, gfc_new_block);
 
   compiling_enum = 1;
@@ -2167,10 +2150,7 @@ parse_enum (void)
 	case ST_END_ENUM:
 	  compiling_enum = 0;
 	  if (!seen_enumerator)
-	    {
-	      gfc_error ("ENUM declaration at %C has no ENUMERATORS");
-	      error_flag = 1;
-	    }
+	    gfc_error ("ENUM declaration at %C has no ENUMERATORS");
 	  accept_statement (st);
 	  break;
 
diff --git a/gcc/genemit.c b/gcc/genemit.c
index 7ac3c917067..1a6502585db 100644
--- a/gcc/genemit.c
+++ b/gcc/genemit.c
@@ -1,6 +1,6 @@
 /* Generate code from machine description to emit insns as rtl.
    Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
-   2003, 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
+   2003, 2004, 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -520,12 +520,13 @@ gen_expand (rtx expand)
 	 (unless we aren't going to use them at all).  */
       if (XVEC (expand, 1) != 0)
 	{
-	  for (i = 0; i < operands; i++)
-	    printf ("    operand%d = operands[%d];\n", i, i);
-	  for (; i <= max_dup_opno; i++)
-	    printf ("    operand%d = operands[%d];\n", i, i);
-	  for (; i <= max_scratch_opno; i++)
-	    printf ("    operand%d = operands[%d];\n", i, i);
+	  for (i = 0;
+	       i < MAX (operands, MAX (max_scratch_opno, max_dup_opno) + 1);
+	       i++)
+	    {
+	      printf ("    operand%d = operands[%d];\n", i, i);
+	      printf ("    (void) operand%d;\n", i);
+	    }
 	}
       printf ("  }\n");
     }
@@ -647,7 +648,10 @@ gen_split (rtx split)
 
   /* Output code to copy the arguments back out of `operands'  */
   for (i = 0; i < operands; i++)
-    printf ("  operand%d = operands[%d];\n", i, i);
+    {
+      printf ("  operand%d = operands[%d];\n", i, i);
+      printf ("  (void) operand%d;\n", i);
+    }
 
   /* Output code to construct the rtl for the instruction bodies.
      Use emit_insn to add them to the sequence being accumulated.
diff --git a/gcc/java/ChangeLog b/gcc/java/ChangeLog
index 3fefe43059a..f1a60807436 100644
--- a/gcc/java/ChangeLog
+++ b/gcc/java/ChangeLog
@@ -1,3 +1,9 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* exception.cc (_Jv_Throw): Avoid set but not used warning.
+	* include/java-assert.h (JvAssertMessage, JvAssert): Use argument in
+	sizeof to avoid set but not used warnings.
+
 2010-01-20  Joern Rennecke  <amylaar@spamcop.net>
 
 	* lang.c (java_post_options): Constify variable "dot".
diff --git a/gcc/java/builtins.c b/gcc/java/builtins.c
index 099b9e00cd8..a4f59f9fa7f 100644
--- a/gcc/java/builtins.c
+++ b/gcc/java/builtins.c
@@ -1,5 +1,5 @@
 /* Built-in and inline functions for gcj
-   Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007, 2009
+   Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007, 2009, 2010
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -323,6 +323,7 @@ compareAndSwapInt_builtin (tree method_return_type ATTRIBUTE_UNUSED,
     {
       tree addr, stmt;
       UNMARSHAL5 (orig_call);
+      (void) value_type; /* Avoid set but not used warning.  */
 
       addr = build_addr_sum (int_type_node, obj_arg, offset_arg);
       stmt = build_call_expr (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_4],
@@ -347,6 +348,7 @@ compareAndSwapLong_builtin (tree method_return_type ATTRIBUTE_UNUSED,
     {
       tree addr, stmt;
       UNMARSHAL5 (orig_call);
+      (void) value_type; /* Avoid set but not used warning.  */
 
       addr = build_addr_sum (long_type_node, obj_arg, offset_arg);
       stmt = build_call_expr (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_8],
@@ -410,7 +412,8 @@ getVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 {
   tree addr, stmt, modify_stmt, tmp;
   UNMARSHAL3 (orig_call);
-  
+  (void) this_arg; /* Avoid set but not used warning.  */
+
   addr = build_addr_sum (method_return_type, obj_arg, offset_arg);
   addr 
     = fold_convert (build_pointer_type (build_type_variant 
diff --git a/gcc/java/expr.c b/gcc/java/expr.c
index 3c0e2ca1572..a6a3f391a57 100644
--- a/gcc/java/expr.c
+++ b/gcc/java/expr.c
@@ -1,6 +1,6 @@
 /* Process expressions for the GNU compiler for the Java(TM) language.
    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   2005, 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -3329,6 +3329,7 @@ process_jvm_instruction (int PC, const unsigned char* byte_ops,
   {									\
     int saw_index = 0;							\
     int index     = OPERAND_VALUE;					\
+    (void) saw_index; /* Avoid set but not used warning.  */		\
     build_java_ret							\
       (find_local_variable (index, return_address_type_node, oldpc));	\
   }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5c313817f59..b7fb0c5b2ec 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.dg/builtin-choose-expr.c: Avoid set but not used warnings.
+	* gcc.dg/trunc-1.c: Likewise.
+	* gcc.dg/vla-9.c: Likewise.
+	* gcc.dg/dfp/composite-type.c: Likewise.
+
 2010-04-07  Iain Sandoe <iains@gcc.gnu.org>
 
 	PR objc/35996
diff --git a/gcc/testsuite/gcc.dg/builtin-choose-expr.c b/gcc/testsuite/gcc.dg/builtin-choose-expr.c
index 045dc6c41ff..ceac6051f78 100644
--- a/gcc/testsuite/gcc.dg/builtin-choose-expr.c
+++ b/gcc/testsuite/gcc.dg/builtin-choose-expr.c
@@ -29,6 +29,8 @@
           t1 = t1b;						\
           t2 = t2a;						\
           t2 = t2b;						\
+          (void) t1;						\
+          (void) t2;						\
         } while (0)
 
 
diff --git a/gcc/testsuite/gcc.dg/dfp/composite-type.c b/gcc/testsuite/gcc.dg/dfp/composite-type.c
index 508ebbd5e29..69ecb1421c1 100644
--- a/gcc/testsuite/gcc.dg/dfp/composite-type.c
+++ b/gcc/testsuite/gcc.dg/dfp/composite-type.c
@@ -30,18 +30,19 @@ do \
  d##TYPE = f2_##TYPE(h1_##TYPE); \
  d##TYPE = f2_##TYPE(h2_##TYPE); \
  d##TYPE = f2_##TYPE(h3_##TYPE); \
+ (void) d##TYPE; \
 } while(0)
  
 DECIMAL_COMPOSITE_DECL(32);  /* { dg-error "incompatible types when assigning to type '\[^\n\]*' from type '\[^\n\]*'" } */
-/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 35 } */
+/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 36 } */
 
 
 DECIMAL_COMPOSITE_DECL(64);  /* { dg-error "incompatible types when assigning to type '\[^\n\]*' from type '\[^\n\]*'" } */
-/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 39 } */
+/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 40 } */
 
 
 DECIMAL_COMPOSITE_DECL(128); /* { dg-error "incompatible types when assigning to type '\[^\n\]*' from type '\[^\n\]*'" } */
-/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 43 } */
+/* { dg-message "note: expected '\[^'\n\]*' but argument is of type '\[^'\n\]*'" "note: expected" { target *-*-* } 44 } */
 
 
 int main()
diff --git a/gcc/testsuite/gcc.dg/trunc-1.c b/gcc/testsuite/gcc.dg/trunc-1.c
index 0d6a48b4afd..a78cceb598a 100644
--- a/gcc/testsuite/gcc.dg/trunc-1.c
+++ b/gcc/testsuite/gcc.dg/trunc-1.c
@@ -11,5 +11,5 @@ main (void)
 
   len = ~(sizeof (size_t) - 1); /* { dg-bogus "truncated" "bogus truncation warning" } */
 
-  return 0;
+  return len - len;
 }
diff --git a/gcc/testsuite/gcc.dg/vla-9.c b/gcc/testsuite/gcc.dg/vla-9.c
index 0b623b39da7..506a1a2eb14 100644
--- a/gcc/testsuite/gcc.dg/vla-9.c
+++ b/gcc/testsuite/gcc.dg/vla-9.c
@@ -6,4 +6,5 @@ void f(__SIZE_TYPE__ d)
 {
   typedef int t[d];
   t *g = (__typeof (g)) d;
+  (void) g;
 }
diff --git a/gcc/tree-flow.h b/gcc/tree-flow.h
index 6cd47e13180..7bb5088e9e2 100644
--- a/gcc/tree-flow.h
+++ b/gcc/tree-flow.h
@@ -252,17 +252,17 @@ typedef struct immediate_use_iterator_d
 /* Use this iterator when simply looking at stmts.  Adding, deleting or
    modifying stmts will cause this iterator to malfunction.  */
 
-#define FOR_EACH_IMM_USE_FAST(DEST, ITER, SSAVAR)			\
+#define FOR_EACH_IMM_USE_FAST(DEST, ITER, SSAVAR)		\
   for ((DEST) = first_readonly_imm_use (&(ITER), (SSAVAR));	\
        !end_readonly_imm_use_p (&(ITER));			\
-       (DEST) = next_readonly_imm_use (&(ITER)))
+       (void) ((DEST) = next_readonly_imm_use (&(ITER))))
 
 /* Use this iterator to visit each stmt which has a use of SSAVAR.  */
 
 #define FOR_EACH_IMM_USE_STMT(STMT, ITER, SSAVAR)		\
   for ((STMT) = first_imm_use_stmt (&(ITER), (SSAVAR));		\
        !end_imm_use_stmt_p (&(ITER));				\
-       (STMT) = next_imm_use_stmt (&(ITER)))
+       (void) ((STMT) = next_imm_use_stmt (&(ITER))))
 
 /* Use this to terminate the FOR_EACH_IMM_USE_STMT loop early.  Failure to
    do so will result in leaving a iterator marker node in the immediate
@@ -290,7 +290,7 @@ typedef struct immediate_use_iterator_d
 #define FOR_EACH_IMM_USE_ON_STMT(DEST, ITER)			\
   for ((DEST) = first_imm_use_on_stmt (&(ITER));		\
        !end_imm_use_on_stmt_p (&(ITER));			\
-       (DEST) = next_imm_use_on_stmt (&(ITER)))
+       (void) ((DEST) = next_imm_use_on_stmt (&(ITER))))
 
 
 
diff --git a/gcc/tree-outof-ssa.c b/gcc/tree-outof-ssa.c
index ee70583422e..227b06fad85 100644
--- a/gcc/tree-outof-ssa.c
+++ b/gcc/tree-outof-ssa.c
@@ -452,8 +452,9 @@ do {									\
       y_ = VEC_index (int, (GRAPH)->edge_list, x_);			\
       if (y_ != (NODE))							\
         continue;							\
-      (VAR) = VEC_index (int, (GRAPH)->edge_list, x_ + 1);		\
-      (LOCUS) = VEC_index (source_location, (GRAPH)->edge_locus, x_ / 2); \
+      (void) ((VAR) = VEC_index (int, (GRAPH)->edge_list, x_ + 1));	\
+      (void) ((LOCUS) = VEC_index (source_location,			\
+				   (GRAPH)->edge_locus, x_ / 2));	\
       CODE;								\
     }									\
 } while (0)
@@ -472,8 +473,9 @@ do {									\
       y_ = VEC_index (int, (GRAPH)->edge_list, x_ + 1);			\
       if (y_ != (NODE))							\
         continue;							\
-      (VAR) = VEC_index (int, (GRAPH)->edge_list, x_);			\
-      (LOCUS) = VEC_index (source_location, (GRAPH)->edge_locus, x_ / 2); \
+      (void) ((VAR) = VEC_index (int, (GRAPH)->edge_list, x_));		\
+      (void) ((LOCUS) = VEC_index (source_location,			\
+				   (GRAPH)->edge_locus, x_ / 2));	\
       CODE;								\
     }									\
 } while (0)
diff --git a/gcc/tree-ssa-operands.h b/gcc/tree-ssa-operands.h
index a435fab0201..13d29c3ab01 100644
--- a/gcc/tree-ssa-operands.h
+++ b/gcc/tree-ssa-operands.h
@@ -1,5 +1,6 @@
 /* SSA operand management for trees.
-   Copyright (C) 2003, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2005, 2006, 2007, 2008, 2010
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -160,7 +161,7 @@ typedef struct ssa_operand_iterator_d
 #define FOR_EACH_SSA_TREE_OPERAND(TREEVAR, STMT, ITER, FLAGS)	\
   for (TREEVAR = op_iter_init_tree (&(ITER), STMT, FLAGS);	\
        !op_iter_done (&(ITER));					\
-       TREEVAR = op_iter_next_tree (&(ITER)))
+       (void) (TREEVAR = op_iter_next_tree (&(ITER))))
 
 /* This macro executes a loop over the operands of STMT specified in FLAG,
    returning each operand as a 'use_operand_p' in the variable USEVAR.
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c
index 2331e7b2249..35ce4ccd0e6 100644
--- a/gcc/tree-ssa-pre.c
+++ b/gcc/tree-ssa-pre.c
@@ -4498,7 +4498,6 @@ my_rev_post_order_compute (int *post_order, bool include_entry_exit)
   int sp;
   int post_order_num = 0;
   sbitmap visited;
-  int count;
 
   if (include_entry_exit)
     post_order[post_order_num++] = EXIT_BLOCK;
@@ -4553,12 +4552,7 @@ my_rev_post_order_compute (int *post_order, bool include_entry_exit)
     }
 
   if (include_entry_exit)
-    {
-      post_order[post_order_num++] = ENTRY_BLOCK;
-      count = post_order_num;
-    }
-  else
-    count = post_order_num + 2;
+    post_order[post_order_num++] = ENTRY_BLOCK;
 
   free (stack);
   sbitmap_free (visited);
diff --git a/gcc/tree.c b/gcc/tree.c
index 30bc5be66fe..5da82069131 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -3652,9 +3652,9 @@ build1_stat (enum tree_code code, tree type, tree node MEM_STAT_DECL)
 	  side_effects = 1;			\
         if (!TREE_READONLY (arg##N)		\
 	    && !CONSTANT_CLASS_P (arg##N))	\
-	  read_only = 0;			\
+	  (void) (read_only = 0);		\
         if (!TREE_CONSTANT (arg##N))		\
-	  constant = 0;				\
+	  (void) (constant = 0);		\
       }						\
   } while (0)
 
diff --git a/gcc/tree.h b/gcc/tree.h
index c5c7b01e2e5..4a0fb5e6405 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1507,9 +1507,9 @@ struct GTY(()) tree_vec {
 #define FOR_EACH_CONSTRUCTOR_ELT(V, IX, INDEX, VAL) \
   for (IX = 0; (IX >= VEC_length (constructor_elt, V)) \
 	       ? false \
-	       : ((VAL = VEC_index (constructor_elt, V, IX)->value), \
+	       : (((void) (VAL = VEC_index (constructor_elt, V, IX)->value)), \
 		  (INDEX = VEC_index (constructor_elt, V, IX)->index), \
-	       true); \
+		  true); \
        (IX)++)
 
 /* Append a new constructor element to V, with the specified INDEX and VAL.  */
diff --git a/libffi/ChangeLog b/libffi/ChangeLog
index 2d4ad866cc6..6abe696187f 100644
--- a/libffi/ChangeLog
+++ b/libffi/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* regex.c (byte_re_match_2_internal): Avoid set but not used
+	warning.
+
 2010-04-02  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	* Makefile.in: Regenerate.
diff --git a/libffi/testsuite/libffi.call/err_bad_abi.c b/libffi/testsuite/libffi.call/err_bad_abi.c
index a21a3fddd04..ce0f3bb2782 100644
--- a/libffi/testsuite/libffi.call/err_bad_abi.c
+++ b/libffi/testsuite/libffi.call/err_bad_abi.c
@@ -17,11 +17,9 @@ int main (void)
 	ffi_cif cif;
         void *code;
 	ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
-	void* args[1];
 	ffi_type* arg_types[1];
 
 	arg_types[0] = NULL;
-	args[0] = NULL;
 
 	CHECK(ffi_prep_cif(&cif, 255, 0, &ffi_type_void,
 		arg_types) == FFI_BAD_ABI);
diff --git a/libiberty/regex.c b/libiberty/regex.c
index ad496846904..420c7f4a47d 100644
--- a/libiberty/regex.c
+++ b/libiberty/regex.c
@@ -4,7 +4,7 @@
    internationalization features.)
 
    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
-   2002, 2005 Free Software Foundation, Inc.
+   2002, 2005, 2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -7140,8 +7140,8 @@ byte_re_match_2_internal (struct re_pattern_buffer *bufp,
                register from the stack, since lowest will == highest in
                `pop_failure_point'.  */
             active_reg_t dummy_low_reg, dummy_high_reg;
-            UCHAR_T *pdummy = NULL;
-            const CHAR_T *sdummy = NULL;
+            UCHAR_T *pdummy ATTRIBUTE_UNUSED = NULL;
+            const CHAR_T *sdummy ATTRIBUTE_UNUSED = NULL;
 
             DEBUG_PRINT1 ("EXECUTING pop_failure_jump.\n");
             POP_FAILURE_POINT (sdummy, pdummy,
diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index 0a46cf50d81..dd502d13c09 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,9 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* exception.cc (_Jv_Throw): Avoid set but not used warning.
+	* include/java-assert.h (JvAssertMessage, JvAssert): Use argument in
+	sizeof to avoid set but not used warnings.
+
 2010-04-07  Jason Merrill  <jason@redhat.com>
 
 	* gnu/gcj/runtime/natSharedLibLoader.cc (findCore): Move
diff --git a/libjava/classpath/ChangeLog.gcj b/libjava/classpath/ChangeLog.gcj
index b6256a9b159..43efda4dc3c 100644
--- a/libjava/classpath/ChangeLog.gcj
+++ b/libjava/classpath/ChangeLog.gcj
@@ -1,3 +1,9 @@
+2010-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	* native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c
+	(Java_gnu_javax_sound_midi_alsa_AlsaPortDevice_run_1receiver_1thread_1):
+	Avoid set but not used warning.
+
 2010-01-09  Jakub Jelinek  <jakub@redhat.com>
 
 	* gnu/java/rmi/registry/RegistryImpl.java (version): Update
diff --git a/libjava/classpath/native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c b/libjava/classpath/native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c
index f4f8dd84a06..d3e4f2b45a0 100644
--- a/libjava/classpath/native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c
+++ b/libjava/classpath/native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c
@@ -1,5 +1,5 @@
 /* gnu_javax_sound_midi_alsa_AlsaPortDevice.c - Native support
-   Copyright (C) 2005 
+   Copyright (C) 2005, 2010
    Free Software Foundation, Inc.
    
 This file is part of GNU Classpath.
@@ -48,7 +48,6 @@ Java_gnu_javax_sound_midi_alsa_AlsaPortDevice_run_1receiver_1thread_1
   (JNIEnv *env, jobject this __attribute__((unused)), 
    jlong client, jlong port, jobject receiver)
 {
-  int rc;
   snd_seq_port_info_t *pinfo, *sinfo;
   snd_seq_port_subscribe_t *subs;
   snd_seq_addr_t sender, dest;
@@ -58,12 +57,12 @@ Java_gnu_javax_sound_midi_alsa_AlsaPortDevice_run_1receiver_1thread_1
   snd_seq_port_info_alloca (&sinfo);
   snd_seq_port_subscribe_alloca (&subs);
 
-  rc = snd_seq_open (&seq, "default", SND_SEQ_OPEN_DUPLEX, SND_SEQ_NONBLOCK);
+  snd_seq_open (&seq, "default", SND_SEQ_OPEN_DUPLEX, SND_SEQ_NONBLOCK);
 
   snd_seq_port_info_set_capability (pinfo, SND_SEQ_PORT_CAP_WRITE);
   snd_seq_port_info_set_type (pinfo, SND_SEQ_PORT_TYPE_MIDI_GENERIC);
 
-  rc = snd_seq_create_port (seq, pinfo);
+  snd_seq_create_port (seq, pinfo);
 
   sender.client = (int) client;
   sender.port = (int) port;
@@ -72,7 +71,7 @@ Java_gnu_javax_sound_midi_alsa_AlsaPortDevice_run_1receiver_1thread_1
 
   snd_seq_port_subscribe_set_sender (subs, &sender);
   snd_seq_port_subscribe_set_dest (subs, &dest);
-  rc = snd_seq_subscribe_port(seq, subs);
+  snd_seq_subscribe_port(seq, subs);
 
   {
     int npfd;
diff --git a/libjava/exception.cc b/libjava/exception.cc
index 8affbbe9fdf..76f145112ff 100644
--- a/libjava/exception.cc
+++ b/libjava/exception.cc
@@ -1,6 +1,6 @@
 // Functions for Exception Support for Java.
 
-/* Copyright (C) 1998, 1999, 2001, 2002, 2006  Free Software Foundation
+/* Copyright (C) 1998, 1999, 2001, 2002, 2006, 2010  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -111,11 +111,10 @@ _Jv_Throw (jthrowable value)
 
   /* We're happy with setjmp/longjmp exceptions or region-based
      exception handlers: entry points are provided here for both.  */
-  _Unwind_Reason_Code code;
 #ifdef SJLJ_EXCEPTIONS
-  code = _Unwind_SjLj_RaiseException (&xh->unwindHeader);
+  _Unwind_SjLj_RaiseException (&xh->unwindHeader);
 #else
-  code = _Unwind_RaiseException (&xh->unwindHeader);
+  _Unwind_RaiseException (&xh->unwindHeader);
 #endif
 
   /* If code == _URC_END_OF_STACK, then we reached top of stack without
diff --git a/libjava/include/java-assert.h b/libjava/include/java-assert.h
index 57962418b7d..1d3a49bfa38 100644
--- a/libjava/include/java-assert.h
+++ b/libjava/include/java-assert.h
@@ -1,6 +1,6 @@
 // java-assert.h - Header file holding assertion definitions.  -*- c++ -*-
 
-/* Copyright (C) 1998, 1999  Free Software Foundation
+/* Copyright (C) 1998, 1999, 2010  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -29,8 +29,8 @@ void _Jv_Abort (const char *, const char *, int, const char *)
 #else /* __GCJ_DEBUG */
 
 #define _Jv_AssertDoCall(Message)
-#define JvAssertMessage(Expr, Message)
-#define JvAssert(Expr)
+#define JvAssertMessage(Expr, Message) (void) sizeof (Expr)
+#define JvAssert(Expr) (void) sizeof (Expr)
 #define JvFail(Message) _Jv_Abort (0, 0, 0, Message)
 
 #endif /* not __GCJ_DEBUG */