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[Bug middle-end/70370] ICE in execute_todo, at passes.c:2003 when using __real__ or __imag__ as lvalue in asm
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 23 Mar 2016 15:30:34 +0000
- Subject: [Bug middle-end/70370] ICE in execute_todo, at passes.c:2003 when using __real__ or __imag__ as lvalue in asm
- Auto-submitted: auto-generated
- References: <bug-70370-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70370
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|aarch64 |
Status|NEW |ASSIGNED
Component|c |middle-end
Version|unknown |6.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think it's ok to use __real/__imag as lvalue. The ICE is odd, it appears
after ipa-pure-const (pass_nothrow).
Ah, but the ASM misses virtual operands after into-SSA thus this looks like
an operand scanner issue.
Target independent testcase:
_Complex float foo (_Complex float f)
{
__asm__ ("" : "=r" (__real f));
return f;
}
the issue is you need a memory constraint to use a memory input here or
rather the issue is we fail to properly gimplify this.