re PR tree-optimization/24627 (xntp miscompiled)

	PR 24627
	* tree-ssa-dce.c (pass_dce, pass_dce_loop, pass_cd_dce): Use
	TODO_update_ssa instead of TODO_update_ssa_no_phi.

testsuite/

	PR 24627
	* gcc.dg/tree-ssa/pr24627.c: New test.

From-SVN: r106502

gcc/ChangeLog

+2005-11-03  Diego Novillo  <dnovillo@redhat.com>
+
+	PR 24627
+	* tree-ssa-dce.c (pass_dce, pass_dce_loop, pass_cd_dce): Use
+	TODO_update_ssa instead of TODO_update_ssa_no_phi.
+
 2005-11-04  Sebastian Pop  <pop@cri.ensmp.fr>
 
 	PR/18595

gcc/testsuite/ChangeLog

+2005-11-04  Diego Novillo  <dnovillo@redhat.com>
+
+	PR 24627
+	* gcc.dg/tree-ssa/pr24627.c: New test.
+
 2005-11-04 Paul Brook  <paul@codesourcery.com>
 
 	* gcc.dg/tls/opt-10.c: New test.

gcc/testsuite/gcc.dg/tree-ssa/pr24627.c

+/* { dg-do run } */
+/* { dg-options "-O" } */
+
+extern void abort (void);
+typedef unsigned int u_int32;
+
+typedef struct {
+  union {u_int32 Xl_ui;} Ul_i;
+  union {u_int32 Xl_uf;} Ul_f;
+} l_fp;
+
+void
+dolfptoa (short ndec)
+{
+  l_fp work, ftmp;
+
+  work.Ul_i.Xl_ui = 0;
+  work.Ul_f.Xl_uf = 0x535f3d8;
+
+  while (ndec > 0)
+    {
+      u_int32 lo_tmp;
+      u_int32 hi_tmp;
+
+      ndec--;
+      work.Ul_i.Xl_ui = 0;
+      work.Ul_i.Xl_ui <<= 1;
+      if ((work.Ul_f.Xl_uf) & 0x80000000)
+	(work.Ul_i.Xl_ui) |= 0x1;
+      (work.Ul_f.Xl_uf) <<= 1;
+
+      ftmp = work;
+      (work.Ul_i.Xl_ui) <<= 1;
+      if ((work.Ul_f.Xl_uf) & 0x80000000)
+	(work.Ul_i.Xl_ui) |= 0x1;
+      (work.Ul_f.Xl_uf) <<= 1;
+
+      (work.Ul_i.Xl_ui) <<= 1;
+      if ((work.Ul_f.Xl_uf) & 0x80000000)
+	(work.Ul_i.Xl_ui) |= 0x1;
+      (work.Ul_f.Xl_uf) <<= 1;
+
+      lo_tmp = ((work.Ul_f.Xl_uf) & 0xffff) + ((ftmp.Ul_f.Xl_uf) & 0xffff);
+      hi_tmp = (((work.Ul_f.Xl_uf) >> 16) & 0xffff)
+               + (((ftmp.Ul_f.Xl_uf) >> 16) & 0xffff);
+
+      if (lo_tmp & 0x10000)
+	hi_tmp++;
+
+      (work.Ul_f.Xl_uf) = ((hi_tmp & 0xffff) << 16) | (lo_tmp & 0xffff);
+      (work.Ul_i.Xl_ui) += (ftmp.Ul_i.Xl_ui);
+
+      if (hi_tmp & 0x10000)
+	(work.Ul_i.Xl_ui)++;
+
+
+      if (!(work.Ul_i.Xl_ui < 10))
+	abort ();
+    }
+}
+
+int main()
+{
+  dolfptoa(6);
+  return 0;
+}

gcc/tree-ssa-dce.c

@@ -977,7 +977,7 @@ struct tree_opt_pass pass_dce =
   0,					/* properties_destroyed */
   0,					/* todo_flags_start */
   TODO_dump_func 
-    | TODO_update_ssa_no_phi 
+    | TODO_update_ssa
     | TODO_cleanup_cfg
     | TODO_ggc_collect
     | TODO_verify_ssa,			/* todo_flags_finish */
@@ -998,7 +998,7 @@ struct tree_opt_pass pass_dce_loop =
   0,					/* properties_destroyed */
   0,					/* todo_flags_start */
   TODO_dump_func 
-    | TODO_update_ssa_no_phi 
+    | TODO_update_ssa
     | TODO_cleanup_cfg
     | TODO_verify_ssa,			/* todo_flags_finish */
   0					/* letter */
@@ -1018,7 +1018,7 @@ struct tree_opt_pass pass_cd_dce =
   0,					/* properties_destroyed */
   0,					/* todo_flags_start */
   TODO_dump_func
-    | TODO_update_ssa_no_phi
+    | TODO_update_ssa
     | TODO_cleanup_cfg
     | TODO_ggc_collect
     | TODO_verify_ssa