> --- Comment #1 from Mikael Pettersson <mikpe at it dot uu.se> 2012-03-04
> 21:01:28 UTC ---
> Created attachment 26827
> --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26827
> reduced test case in C
>
> Depends on target CPU selection. -mcpu=680[012346]0 and -mcpu=cpu32 all work,
> but -mcpu=5206 (or apparently any other coldfire) ICEs.
Indeed. Fixed by not trying to use negqi2 directly, but going
through the normal expanders which will DTRT for coldfire.
Tested via cross-compile, committed to mainline and 4.7.
r~
PR target/52481
* config/m68k/sync.md (atomic_test_and_set): Use expand_simple_unop
instead of calling negqi2 directly.
diff --git a/gcc/config/m68k/sync.md b/gcc/config/m68k/sync.md
index 5d5002a..6c840f5 100644
--- a/gcc/config/m68k/sync.md
+++ b/gcc/config/m68k/sync.md
@@ -62,8 +62,11 @@
(match_operand:SI 2 "const_int_operand" "")] ;; model
""
{
- emit_insn (gen_atomic_test_and_set_1 (operands[0], operands[1]));
- emit_insn (gen_negqi2 (operands[0], operands[0]));
+ rtx t = gen_reg_rtx (QImode);
+ emit_insn (gen_atomic_test_and_set_1 (t, operands[1]));
+ t = expand_simple_unop (QImode, NEG, t, operands[0], 0);
+ if (t != operands[0])
+ emit_move_insn (operands[0], t);
DONE;
})
