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Re: Enable nonoverallping_component_refs even after the base pointers are equivalent

From: Jan Hubicka <hubicka at ucw dot cz>
To: Richard Biener <rguenther at suse dot de>
Cc: gcc-patches at gcc dot gnu dot org, d at dcepelik dot cz
Date: Thu, 4 Jul 2019 14:46:49 +0200
Subject: Re: Enable nonoverallping_component_refs even after the base pointers are equivalent
References: <20190702091448.jeum2qlk33d7ddl4@kam.mff.cuni.cz> <alpine.LSU.2.20.1907031438300.2976@zhemvz.fhfr.qr>

> 
> Why does this only happen in fre3?!
After fre1 we have

test (int i, int j, int k, int l)
{ 
  struct c * cptr.0_1;
  struct c * cptr2.1_2;
  int _11;

  <bb 2> :
  cptr.0_1 = cptr;
  cptr.0_1->b[i_5(D)].a[j_6(D)].val = 123;
  cptr2.1_2 = cptr2;
  cptr2.1_2->b[k_8(D)].a2[l_9(D)].val = 2;
  _11 = cptr.0_1->b[i_5(D)].a[j_6(D)].val;
  return _11;
}

I think it is the same issue with AO querries not being valueized
you fixed for the other testcase and later reverted.

Honza

Follow-Ups:
- Re: Enable nonoverallping_component_refs even after the base pointers are equivalent
  - From: Richard Biener

References:
- Enable nonoverallping_component_refs even after the base pointers are equivalent
  - From: Jan Hubicka
- Re: Enable nonoverallping_component_refs even after the base pointers are equivalent
  - From: Richard Biener

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