Temporarily revert previous

From-SVN: r191306

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cbe531ad86f3e4f16dce86e3ef037449c767eeeb..847b12089d97379d2ec41d162768e7139f57dbe3 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,8 +1,3 @@
-2012-09-14  Richard Earnshaw  <rearnsha@arm.com>
-
-       * reload.c (find_dummy_reload): Don't use OUT as a reload reg
-       for IN if it overlaps a fixed register.
-
 2012-09-14  Eric Botcazou  <ebotcazou@adacore.com>
 
        PR rtl-optimization/44194

diff --git a/gcc/reload.c b/gcc/reload.c
index 2e41ed6498e6a394dc01c6c4ed3d1f6df6da6ec6..f4f3ed03d859fb59a251cc3bfc32fe592d041b2d 100644 (file)
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -2036,12 +2036,7 @@ find_dummy_reload (rtx real_in, rtx real_out, rtx *inloc, rtx *outloc,
         However, we only ignore IN in its role as this reload.
         If the insn uses IN elsewhere and it contains OUT,
         that counts.  We can't be sure it's the "same" operand
-        so it might not go through this reload.  
-
-         We also need to avoid using OUT if it, or part of it, is a
-         fixed register.  Modifying such registers, even transiently,
-         may have undefined effects on the machine, such as modifying
-         the stack pointer.  */
+        so it might not go through this reload.  */
       saved_rtx = *inloc;
       *inloc = const0_rtx;
 
@@ -2054,8 +2049,7 @@ find_dummy_reload (rtx real_in, rtx real_out, rtx *inloc, rtx *outloc,
 
          for (i = 0; i < nwords; i++)
            if (! TEST_HARD_REG_BIT (reg_class_contents[(int) rclass],
-                                    regno + i)
-               || fixed_regs[regno + i])
+                                    regno + i))
              break;
 
          if (i == nwords)