VM: ASM_MUL for ARM: Add earlyclobber constraint to the SMULL outputs.

Reported by Rob Browning <rlb@defaultvalue.org>.

* libguile/vm-i-scheme.c (ASM_MUL)[ARM]: Add earlyclobber (&) constraint
  to the SMULL output registers.

diff --git a/libguile/vm-i-scheme.c b/libguile/vm-i-scheme.c
index 587aa95..162efab 100644 (file)
--- a/libguile/vm-i-scheme.c
+++ b/libguile/vm-i-scheme.c
@@ -1,5 +1,4 @@
-/* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013,
- *   2014 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2009-2014 Free Software Foundation, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public License
@@ -363,7 +362,7 @@ VM_DEFINE_FUNCTION (149, ge, "ge?", 2)
       {                                                                        \
        scm_t_signed_bits rlo, rhi;                                     \
        asm ("smull %0, %1, %2, %3\n"                                   \
-            : "=r" (rlo), "=r" (rhi)                                   \
+            : "=&r" (rlo), "=&r" (rhi)                                 \
             : "r" (SCM_UNPACK (x) - scm_tc2_int),                      \
               "r" (SCM_I_INUM (y)));                                   \
        if (SCM_LIKELY (SCM_SRS (rlo, 31) == rhi))                      \