re PR target/49780 ([x32] internal compiler error: in create_mem_ref, at tree-ssa-address.c:806)

	PR target/49780
	* config/i386/predicates.md (no_seg_addres_operand): No more special.
	* config/i386/i386.c (ix86_decompose_address): Allow only subregs
	of DImode hard registers in base.
	(ix86_legitimate_address_p): Allow SImode and DImode base and index
	registers.

From-SVN: r176506

gcc/ChangeLog

+2011-07-20  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/49780
+	* config/i386/predicates.md (no_seg_addres_operand): No more special.
+	* config/i386/i386.c (ix86_decompose_address): Allow only subregs
+	of DImode hard registers in base.
+	(ix86_legitimate_address_p): Allow SImode and DImode base and index
+	registers.
+
 2011-07-20  Richard Guenther  <rguenther@suse.de>
 
-	* tree-ssa-structalias.c (new_var_info): Allocate oldsolution
-	lazily.
+	* tree-ssa-structalias.c (new_var_info): Allocate oldsolution lazily.
 	(unify_nodes): Deal with that.
 	(solve_graph): Likewise.
 
@@ -91,8 +99,8 @@
 	(GNU_USER_LINK_EMULATION32, GNU_USER_LINK_EMULATION64)
 	(GNU_USER_LINK_EMULATIONN32): New macros.
 
-	* config.gcc (mips64*-*-linux* | mipsisa64*-*-linux* |
-	mips-*-linux*): Use the new headers.
+	* config.gcc (mips64*-*-linux* | mipsisa64*-*-linux* | mips-*-linux*):
+	Use the new headers.
 
 2011-07-19  Richard Sandiford  <rdsandiford@googlemail.com>
 

gcc/config/i386/i386.c

@@ -11085,8 +11085,16 @@ ix86_decompose_address (rtx addr, struct ix86_address *out)
   int retval = 1;
   enum ix86_address_seg seg = SEG_DEFAULT;
 
-  if (REG_P (addr) || GET_CODE (addr) == SUBREG)
+  if (REG_P (addr))
     base = addr;
+  else if (GET_CODE (addr) == SUBREG)
+    {
+      /* Allow only subregs of DImode hard regs.  */
+      if (register_no_elim_operand (SUBREG_REG (addr), DImode))
+	base = addr;
+      else
+	return 0;
+    }
   else if (GET_CODE (addr) == PLUS)
     {
       rtx addends[4], op;
@@ -11643,8 +11651,7 @@ ix86_legitimate_address_p (enum machine_mode mode ATTRIBUTE_UNUSED,
 	/* Base is not a register.  */
 	return false;
 
-      if (GET_MODE (base) != Pmode)
-	/* Base is not in Pmode.  */
+      if (GET_MODE (base) != SImode && GET_MODE (base) != DImode)
 	return false;
 
       if ((strict && ! REG_OK_FOR_BASE_STRICT_P (reg))
@@ -11672,8 +11679,7 @@ ix86_legitimate_address_p (enum machine_mode mode ATTRIBUTE_UNUSED,
 	/* Index is not a register.  */
 	return false;
 
-      if (GET_MODE (index) != Pmode)
-	/* Index is not in Pmode.  */
+      if (GET_MODE (index) != SImode && GET_MODE (index) != DImode)
 	return false;
 
       if ((strict && ! REG_OK_FOR_INDEX_STRICT_P (reg))

gcc/config/i386/predicates.md

@@ -796,7 +796,7 @@
 
 ;; Return true if op if a valid address, and does not contain
 ;; a segment override.
-(define_special_predicate "no_seg_address_operand"
+(define_predicate "no_seg_address_operand"
   (match_operand 0 "address_operand")
 {
   struct ix86_address parts;