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[Bug target/82221] internal compiler error: in print_reg, at config/i386/i386.c:17656
- From: "jpoimboe at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 15 Sep 2017 22:25:16 +0000
- Subject: [Bug target/82221] internal compiler error: in print_reg, at config/i386/i386.c:17656
- Auto-submitted: auto-generated
- References: <bug-82221-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82221
--- Comment #12 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
While I know about DRAP, I'm otherwise not very familiar with GCC internals, so
I don't quite understand your points.
I would like to clarify that most of the time, when we use "sp" in the clobbers
list, the stack does *not* need to be realigned. And in those cases, we would
*not* want DRAP, because it's not needed. We would instead just want the
normal frame pointer setup.
For cases where the stack pointer *does* need to be realigned, DRAP is fine.
I can try out your patch next week to see what changes it makes to the
generated code. Thanks!