emit-rtl.c (gen_rtx_REG): Temporarily turn off automatic sharing of hard registers.

        * emit-rtl.c (gen_rtx_REG): Temporarily turn off automatic
        sharing of hard registers.

        * toplev.c (rest_of_compilation): Remove redundant conditional.

From-SVN: r54672

1 files changed, 8 insertions, 1 deletions

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 5186c85..225b8c8 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -533,14 +533,21 @@ gen_rtx_REG (mode, regno)
 	return stack_pointer_rtx;
     }
 
+#if 0
   /* If the per-function register table has been set up, try to re-use
-     an existing entry in that table to avoid useless generation of RTL.  */
+     an existing entry in that table to avoid useless generation of RTL.
+
+     This code is disabled for now until we can fix the various backends
+     which depend on having non-shared hard registers in some cases.   Long
+     term we want to re-enable this code as it can significantly cut down
+     on the amount of useless RTL that gets generated.  */
   if (cfun
       && cfun->emit
       && regno_reg_rtx
       && regno < FIRST_PSEUDO_REGISTER
       && reg_raw_mode[regno] == mode)
     return regno_reg_rtx[regno];
+#endif
 
   return gen_raw_REG (mode, regno);
 }