[Bug target/50603] [x32] Unnecessary lea

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50603

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |UNCONFIRMED
     Ever Confirmed|1                           |0

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-03 20:57:53 UTC ---
I am testing this patch:

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 7e89dbd..612fcd2 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -15713,6 +15713,16 @@ ix86_fixup_binary_operands (enum rtx_code code, enum
ma
chine_mode mode,
       else
     src2 = force_reg (mode, src2);
     }
+  else
+    {
+      /* Improve address combine in x32 mode.  */
+      if (TARGET_X32
+      && code == PLUS
+      && !MEM_P (dst)
+      && !MEM_P (src1)
+      && MEM_P (src2) )
+    src2 = force_reg (mode, src2);
+    }

   /* If the destination is memory, and we do not have matching source
      operands, do things in registers.  */