[Bug target/37640] Misuse of __sync_lock_test_and_set causes ICE

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2008-09-24 20:16 -------
Something like this fixes the issue:
Index: config/rs6000/rs6000.c
===================================================================
--- config/rs6000/rs6000.c      (revision 140638)
+++ config/rs6000/rs6000.c      (working copy)
@@ -14082,7 +14082,8 @@ rs6000_expand_compare_and_swapqhi (rtx d
   HOST_WIDE_INT imask = GET_MODE_MASK (mode);

   /* Shift amount for subword relative to aligned word.  */
-  addrSI = force_reg (SImode, gen_lowpart_common (SImode, XEXP (mem, 0)));
+  addrSI = force_reg (GET_MODE (XEXP (mem, 0)), XEXP (mem, 0));
+  addrSI = force_reg (SImode, gen_lowpart_common (SImode, addrSI));
   shift = gen_reg_rtx (SImode);
   emit_insn (gen_rlwinm (shift, addrSI, GEN_INT (3),
                         GEN_INT (shift_mask)));

--- CUT ---
gen_lowpart_common does not work on non regs so force the addition to memory
first and then get the lowerpart.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|__sync_lock_test_and_set    |Misuse of
                   |causes ICE                  |__sync_lock_test_and_set
                   |                            |causes ICE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37640