http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47566
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2011.02.01 15:36:11
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #9 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-01
15:36:11 UTC ---
I can reproduce it. I also run into
In file included from :425:0:
/tmp/cp2k/makefiles/../src/realspace_grid_types.F: In function
'rs_pw_transfer_replicated':
/tmp/cp2k/makefiles/../src/realspace_grid_types.F:816:0: error: non-trivial
conversion at assignment
struct array3_real(kind=8)
struct array3_real(kind=8)
# .MEM_755 = VDEF <.MEM_649>
grid = D.39399_277->r;
and a couple of similar ICEs in other ltrans units. Probably the known
restrict vs. non-restrict bug.
The bug happens when optimizing fft3d_pb, it also happens with -fno-inline
so indeed the bug might be triggered by the mix of -O0 and -O3 (thus, by
not running early optimizations).
Seems to be -ffast-math vs. non-fast-math. We fold calls during
PRE insertion which turns cabs into components (complex lowering).
That folding,
folded = build_call_array (currop->type,
(TREE_CODE (fn) == FUNCTION_DECL
? build_fold_addr_expr (fn) : fn),
nargs, args);
can create arbitrary number of expressions, including for some reason
non-gimple reg vars. In particular fold_builtin_cabs returns
__builtin_sqrt (__builtin_pow (SAVE_EXPR <REALPART_EXPR <SAVE_EXPR
<val.767_1280>>>, 2.0e+0) + __builtin_pow (SAVE_EXPR <IMAGPART_EXPR <SAVE_EXPR
<val.767_1280>>>, 2.0e+0))
and then save-expr gimplification introduces the non-register temporary
as a result of SSA_NAME save-expr (which is unnecessary anyway).
The following fixes the ICE for me:
Index: builtins.c
===================================================================
--- builtins.c (revision 169476)
+++ builtins.c (working copy)
@@ -652,9 +652,10 @@ target_char_cast (tree cst, char *p)
static tree
builtin_save_expr (tree exp)
{
- if (TREE_ADDRESSABLE (exp) == 0
- && (TREE_CODE (exp) == PARM_DECL
- || (TREE_CODE (exp) == VAR_DECL && !TREE_STATIC (exp))))
+ if (TREE_CODE (exp) == SSA_NAME
+ || (TREE_ADDRESSABLE (exp) == 0
+ && (TREE_CODE (exp) == PARM_DECL
+ || (TREE_CODE (exp) == VAR_DECL && !TREE_STATIC (exp)))))
return exp;
return save_expr (exp);
