[PATCH, i386]: Add REG_EQUAL notes to SSE mult sequences (+ a fix in legitimize_tls_address)

[Uros Bizjak]

Hello!

2011-08-27  Uros Bizjak  <ubiz...@gmail.com>

        * config/i386/sse.md (mulv16qi3): Attach REG_EQUAL note.
        (*sse2_mulv4si3): Ditto.
        (mulv2di3): Ditto.
        * config/i386/i386.c (legitimize_tls_address): Change REG_EQIV
        notes to REG_EQUAL.

Tested on x86_64-pc-linux-gnu {,-m32}, committed to mainline SVN.

Uros.

Index: sse.md
===================================================================
--- sse.md      (revision 178130)
+++ sse.md      (working copy)
@@ -4726,6 +4726,9 @@
 
   /* Extract the even bytes and merge them back together.  */
   ix86_expand_vec_extract_even_odd (operands[0], t[5], t[4], 0);
+
+  set_unique_reg_note (get_last_insn (), REG_EQUAL,
+                      gen_rtx_MULT (V16QImode, operands[1], operands[2]));
   DONE;
 })
 
@@ -5179,6 +5182,9 @@
 
   /* Merge the parts back together.  */
   emit_insn (gen_vec_interleave_lowv4si (op0, t5, t6));
+
+  set_unique_reg_note (get_last_insn (), REG_EQUAL,
+                      gen_rtx_MULT (V4SImode, operands[1], operands[2]));
   DONE;
 })
 
@@ -5261,6 +5267,9 @@
       emit_insn (gen_addv2di3 (t6, t1, t4));
       emit_insn (gen_addv2di3 (op0, t6, t5));
     }
+
+  set_unique_reg_note (get_last_insn (), REG_EQUAL,
+                      gen_rtx_MULT (V2DImode, operands[1], operands[2]));
   DONE;
 })
 
Index: i386.c
===================================================================
--- i386.c      (revision 178129)
+++ i386.c      (working copy)
@@ -12268,7 +12268,7 @@ legitimize_tls_address (rtx x, enum tls_model mode
          tp = get_thread_pointer (true);
          dest = force_reg (Pmode, gen_rtx_PLUS (Pmode, tp, dest));
 
-         set_unique_reg_note (get_last_insn (), REG_EQUIV, x);
+         set_unique_reg_note (get_last_insn (), REG_EQUAL, x);
        }
       else
        {
@@ -12315,7 +12315,7 @@ legitimize_tls_address (rtx x, enum tls_model mode
            emit_insn (gen_tls_dynamic_gnu2_32 (base, tmp, pic));
 
          tp = get_thread_pointer (true);
-         set_unique_reg_note (get_last_insn (), REG_EQUIV,
+         set_unique_reg_note (get_last_insn (), REG_EQUAL,
                               gen_rtx_MINUS (Pmode, tmp, tp));
        }
       else
@@ -12331,7 +12331,7 @@ legitimize_tls_address (rtx x, enum tls_model mode
              insns = get_insns ();
              end_sequence ();
 
-             /* Attach a unique REG_EQUIV, to allow the RTL optimizers to
+             /* Attach a unique REG_EQUAL, to allow the RTL optimizers to
                 share the LD_BASE result with other LD model accesses.  */
              eqv = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, const0_rtx),
                                    UNSPEC_TLS_LD_BASE);
@@ -12352,7 +12352,7 @@ legitimize_tls_address (rtx x, enum tls_model mode
        {
          dest = force_reg (Pmode, gen_rtx_PLUS (Pmode, dest, tp));
 
-         set_unique_reg_note (get_last_insn (), REG_EQUIV, x);
+         set_unique_reg_note (get_last_insn (), REG_EQUAL, x);
        }
       break;