PR inline-asm/39058

	* recog.h (asm_operand_ok): Add constraints argument.
	* recog.c (asm_operand_ok): Likewise.  If it is set, for digits
	recurse on matching constraint.
	(check_asm_operands): Pass constraints as 3rd argument to
	asm_operand_ok.  Don't look up matching constraint here.
	* stmt.c (expand_asm_operands): Pass NULL as 3rd argument
	to asm_operand_ok.

	* gcc.target/i386/pr39058.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@143867 138bc75d-0d04-0410-961f-82ee72b054a4

6 files changed, 78 insertions, 19 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 49517440472..a4c777c57a5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2009-02-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR inline-asm/39058
+	* recog.h (asm_operand_ok): Add constraints argument.
+	* recog.c (asm_operand_ok): Likewise.  If it is set, for digits
+	recurse on matching constraint.
+	(check_asm_operands): Pass constraints as 3rd argument to
+	asm_operand_ok.  Don't look up matching constraint here.
+	* stmt.c (expand_asm_operands): Pass NULL as 3rd argument
+	to asm_operand_ok.
+
 2009-02-02  Ben Elliston  <bje@au.ibm.com>
 
 	* doc/tm.texi (Storage Layout): Fix TARGET_ALIGN_ANON_BITFIELD and
diff --git a/gcc/recog.c b/gcc/recog.c
index 0e2dd1bd60d..540617d5bb4 100644
--- a/gcc/recog.c
+++ b/gcc/recog.c
@@ -1,6 +1,6 @@
 /* Subroutines used by or related to instruction recognition.
    Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
-   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -156,10 +156,7 @@ check_asm_operands (rtx x)
       const char *c = constraints[i];
       if (c[0] == '%')
 	c++;
-      if (ISDIGIT ((unsigned char) c[0]) && c[1] == '\0')
-	c = constraints[c[0] - '0'];
-
-      if (! asm_operand_ok (operands[i], c))
+      if (! asm_operand_ok (operands[i], c, constraints))
 	return 0;
     }
 
@@ -1547,7 +1544,7 @@ decode_asm_operands (rtx body, rtx *operands, rtx **operand_locs,
    Return > 0 if ok, = 0 if bad, < 0 if inconclusive.  */
 
 int
-asm_operand_ok (rtx op, const char *constraint)
+asm_operand_ok (rtx op, const char *constraint, const char **constraints)
 {
   int result = 0;
 
@@ -1575,15 +1572,29 @@ asm_operand_ok (rtx op, const char *constraint)
 
 	case '0': case '1': case '2': case '3': case '4':
 	case '5': case '6': case '7': case '8': case '9':
-	  /* For best results, our caller should have given us the
-	     proper matching constraint, but we can't actually fail
-	     the check if they didn't.  Indicate that results are
-	     inconclusive.  */
-	  do
-	    constraint++;
-	  while (ISDIGIT (*constraint));
-	  if (! result)
-	    result = -1;
+	  /* If caller provided constraints pointer, look up
+	     the maching constraint.  Otherwise, our caller should have
+	     given us the proper matching constraint, but we can't
+	     actually fail the check if they didn't.  Indicate that
+	     results are inconclusive.  */
+	  if (constraints)
+	    {
+	      char *end;
+	      unsigned long match;
+
+	      match = strtoul (constraint, &end, 10);
+	      if (!result)
+		result = asm_operand_ok (op, constraints[match], NULL);
+	      constraint = (const char *) end;
+	    }
+	  else
+	    {
+	      do
+		constraint++;
+	      while (ISDIGIT (*constraint));
+	      if (! result)
+		result = -1;
+	    }
 	  continue;
 
 	case 'p':
diff --git a/gcc/recog.h b/gcc/recog.h
index 9b73211e874..f2b1f6e4404 100644
--- a/gcc/recog.h
+++ b/gcc/recog.h
@@ -1,6 +1,6 @@
 /* Declarations for interface to insn recognizer and insn-output.c.
    Copyright (C) 1987, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004,
-   2005, 2006, 2007 Free Software Foundation, Inc.
+   2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -72,7 +72,7 @@ struct operand_alternative
 extern void init_recog (void);
 extern void init_recog_no_volatile (void);
 extern int check_asm_operands (rtx);
-extern int asm_operand_ok (rtx, const char *);
+extern int asm_operand_ok (rtx, const char *, const char **);
 extern bool validate_change (rtx, rtx *, rtx, bool);
 extern bool validate_unshare_change (rtx, rtx *, rtx, bool);
 extern bool canonicalize_change_group (rtx insn, rtx x);
diff --git a/gcc/stmt.c b/gcc/stmt.c
index 286e5663c98..c5369061e9d 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -1,6 +1,6 @@
 /* Expands front end tree to back end RTL for GCC
    Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
-   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -886,7 +886,7 @@ expand_asm_operands (tree string, tree outputs, tree inputs,
       else if (MEM_P (op))
 	op = validize_mem (op);
 
-      if (asm_operand_ok (op, constraint) <= 0)
+      if (asm_operand_ok (op, constraint, NULL) <= 0)
 	{
 	  if (allows_reg && TYPE_MODE (type) != BLKmode)
 	    op = force_reg (TYPE_MODE (type), op);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c659971aa4a..828af3fad7a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -4,6 +4,9 @@
 	(check_effective_target_correct_iso_cpp_string_wchar_protos): New.
 	* g++.dg/ext/builtin10.C: New test.
 
+	PR inline-asm/39058
+	* gcc.target/i386/pr39058.c: New test.
+
 2009-02-02  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/38937
diff --git a/gcc/testsuite/gcc.target/i386/pr39058.c b/gcc/testsuite/gcc.target/i386/pr39058.c
new file mode 100644
index 00000000000..2982e8d14c8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr39058.c
@@ -0,0 +1,34 @@
+/* PR inline-asm/39058 */
+/* { dg-options "-O2" } */
+
+double
+f1 ()
+{
+  double x;
+  asm ("" : "=r,r" (x) : "0,0" (x));
+  return x;
+}
+
+double
+f2 ()
+{
+  double x;
+  asm ("" : "=r" (x) : "0" (x));
+  return x;
+}
+
+double
+f3 ()
+{
+  double x, y;
+  asm ("" : "=r,r" (x), "=r,r" (y) : "%0,0" (x), "r,r" (0));
+  return x;
+}
+
+double
+f4 ()
+{
+  double x, y;
+  asm ("" : "=r" (x), "=r" (y) : "0" (x), "r" (0));
+  return x;
+}