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From: "hubicka at kam dot mff.cuni.cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/103267] Wrong code with ipa-sra
Date: Tue, 16 Nov 2021 08:54:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103267

--- Comment #9 from hubicka at kam dot mff.cuni.cz ---
> @@ -1,4 +1,3 @@
> -static int
>  __attribute__ ((noinline,const))
>  infinite (int p)
>  {
Just for a record, it crahes with or without static int here for me :)

I run across it because the code tracking must access in ipa-sra is IMO
conceptually wrong.  I noticed that because ipa-modref solves similar
problem for kills (both need to verify that given access will always
happen).  The post-dominance check is not enough to verify that because
earlier function calls can do things like EH.  I failed to construct an
actual testcase because on interesting stuff like EH we punt for other
reasons (missed fnspec annotations on EH builtins).  I will play with it
more today.=