[PATCH 5/6] rs6000: Don't use gen_rlwinm

[Segher Boessenkool]

The next patch will rename the "rlwinm" pattern (as well as the other patterns
that implement rlwinm, now unnamed).  The only place that uses gen_rlwinm
(an expander) is better off expanding the separate operations separately.
Do so.

Okay for trunk?


Segher


2015-05-10  Segher Boessenkool  <seg...@kernel.crashing.org>

        * config/rs6000/rs6000.md (rs6000_adjust_atomic_subword): Use
        gen_ashlsi3 and gen_andsi3 instead of gen_rlwinm.

---
 gcc/config/rs6000/rs6000.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 7c59ac8..e5b8edd 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -20577,7 +20577,9 @@ rs6000_adjust_atomic_subword (rtx orig_mem, rtx 
*pshift, rtx *pmask)
   /* Shift amount for subword relative to aligned word.  */
   shift = gen_reg_rtx (SImode);
   addr = gen_lowpart (SImode, addr);
-  emit_insn (gen_rlwinm (shift, addr, GEN_INT (3), GEN_INT (shift_mask)));
+  rtx tmp = gen_reg_rtx (SImode);
+  emit_insn (gen_ashlsi3 (tmp, addr, GEN_INT (3)));
+  emit_insn (gen_andsi3 (shift, tmp, GEN_INT (shift_mask)));
   if (BYTES_BIG_ENDIAN)
     shift = expand_simple_binop (SImode, XOR, shift, GEN_INT (shift_mask),
                                 shift, 1, OPTAB_LIB_WIDEN);
-- 
1.8.1.4