[Bug rtl-optimization/55093] [4.8 Regression] [x32] -maddress-mode=long failed

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55093



--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> 2012-10-29 00:41:19 
UTC ---

This patch:





diff --git a/gcc/lra-eliminations.c b/gcc/lra-eliminations.c

index 2222d80..681c609 100644

--- a/gcc/lra-eliminations.c

+++ b/gcc/lra-eliminations.c

@@ -272,7 +272,7 @@ get_elimination (rtx reg)

   if ((hard_regno = REGNO (reg)) < 0 || hard_regno >= FIRST_PSEUDO_REGISTER)

     return NULL;

   if ((ep = elimination_map[hard_regno]) != NULL)

-    return ep->from_rtx != reg ? NULL : ep;

+    return ep->from_rtx != reg && ep->from != hard_regno ? NULL : ep;

   if ((offset = self_elim_offsets[hard_regno]) == 0)

     return NULL;

   /* This is an iteration to restore offsets just after HARD_REGNO



fixes the IC.