re PR target/34174 (gcc produces erroneous asm for movdi)

	PR target/34174
	* config/fr30/fr30.c (fr30_move_double): Sanitize mem->reg case. Copy
	the address before it is clobbered.

testsuite/
	* gcc.dg/torture/pr34174-1.c: New.

From-SVN: r130438

gcc/ChangeLog

+2007-11-26  Rask Ingemann Lambertsen  <rask@sygehus.dk>
+
+	PR target/34174
+	* config/fr30/fr30.c (fr30_move_double): Sanitize mem->reg case. Copy
+	the address before it is clobbered.
+
 2007-11-26  Nick Clifton  <nickc@redhat.com>
 
 	* config/mn10300/mn10300.md: (call_internal): Remove mode on

gcc/config/fr30/fr30.c

@@ -828,47 +828,23 @@ fr30_move_double (rtx * operands)
 	{
 	  rtx addr = XEXP (src, 0);
 	  int dregno = REGNO (dest);
-	  rtx dest0;
-	  rtx dest1;
+	  rtx dest0 = operand_subword (dest, 0, TRUE, mode);;
+	  rtx dest1 = operand_subword (dest, 1, TRUE, mode);;
 	  rtx new_mem;
 	  
-	  /* If the high-address word is used in the address, we
-	     must load it last.  Otherwise, load it first.  */
-	  int reverse = (refers_to_regno_p (dregno, dregno + 1, addr, 0) != 0);
-
 	  gcc_assert (GET_CODE (addr) == REG);
 	  
-	  dest0 = operand_subword (dest, reverse, TRUE, mode);
-	  dest1 = operand_subword (dest, !reverse, TRUE, mode);
-
-	  if (reverse)
-	    {
-	      emit_insn (gen_rtx_SET (VOIDmode, dest1,
-				      adjust_address (src, SImode, 0)));
-	      emit_insn (gen_rtx_SET (SImode, dest0,
-				      gen_rtx_REG (SImode, REGNO (addr))));
-	      emit_insn (gen_rtx_SET (SImode, dest0,
-				      plus_constant (dest0, UNITS_PER_WORD)));
-
-	      new_mem = gen_rtx_MEM (SImode, dest0);
-	      MEM_COPY_ATTRIBUTES (new_mem, src);
-	      
-	      emit_insn (gen_rtx_SET (VOIDmode, dest0, new_mem));
-	    }
-	  else
-	    {
-	      emit_insn (gen_rtx_SET (VOIDmode, dest0,
-				      adjust_address (src, SImode, 0)));
-	      emit_insn (gen_rtx_SET (SImode, dest1,
-				      gen_rtx_REG (SImode, REGNO (addr))));
-	      emit_insn (gen_rtx_SET (SImode, dest1,
-				      plus_constant (dest1, UNITS_PER_WORD)));
-
-	      new_mem = gen_rtx_MEM (SImode, dest1);
-	      MEM_COPY_ATTRIBUTES (new_mem, src);
+	  /* Copy the address before clobbering it.  See PR 34174.  */
+	  emit_insn (gen_rtx_SET (SImode, dest1, addr));
+	  emit_insn (gen_rtx_SET (VOIDmode, dest0,
+				  adjust_address (src, SImode, 0)));
+	  emit_insn (gen_rtx_SET (SImode, dest1,
+				  plus_constant (dest1, UNITS_PER_WORD)));
+
+	  new_mem = gen_rtx_MEM (SImode, dest1);
+	  MEM_COPY_ATTRIBUTES (new_mem, src);
 	      
-	      emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
-	    }
+	  emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
 	}
       else if (src_code == CONST_INT || src_code == CONST_DOUBLE)
 	{

gcc/testsuite/ChangeLog

+2007-11-26  Rask Ingemann Lambertsen  <rask@sygehus.dk>
+
+	PR target/34174
+	* gcc.dg/torture/pr34174-1.c: New.
+
 2007-11-26  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/34233

gcc/testsuite/gcc.dg/torture/pr34174-1.c

+/* { dg-do run } */
+/* Based on PR target/27386 testcase by Joerg Wunsch.  */
+
+extern void abort (void);
+extern void exit (int);
+
+#if __INT_MAX__ >= 9223372036854775807LL
+typedef unsigned int uint64_t;
+#elif __LONG_MAX__ >= 9223372036854775807LL
+typedef unsigned long int uint64_t;
+#elif __LONG_LONG_MAX__ >= 9223372036854775807LL
+typedef unsigned long long int uint64_t;
+#else
+int
+main (void)
+{
+  exit (0);
+}
+#endif
+
+uint64_t a, b, c;
+
+int
+foo (uint64_t x, uint64_t y, uint64_t z, int i)
+{
+  a = x;
+  b = y;
+  c = z;
+  return 2 * i;
+}
+
+int
+main (void)
+{
+  if (foo (1234512345123ull, 3456734567345ull, 7897897897897ull, 42) != 84)
+    abort ();
+  if (a != 1234512345123ull)
+    abort ();
+  if (b != 3456734567345ull)
+    abort ();
+  if (c != 7897897897897ull)
+    abort ();
+  exit (0);
+}