On Mon, Apr 09, 2018 at 01:30:12PM +0300, Andrey Belevantsev wrote:
> I think that should be fine, that is, as long as the insn moved up through
> all those debug insns, the copy will do that as well.  It's that
> problematic conditional in sched-deps.c that we should take care of.
> I've reworded the comment and committed the attached patch.  Thanks for
> your help.

The C++ testcase FAILs everywhere:
FAIL: g++.dg/pr80463.C  -std=gnu++98 (test for excess errors)
Excess errors:
cc1plus: warning: var-tracking-assignments changes selective scheduling

The other testcases in the patch used -w probably to disable the same
warning, so I've committed following as obvious to trunk after regtesting it
on x86_64-linux and i686-linux:

2018-04-09  Jakub Jelinek  <ja...@redhat.com>

        PR rtl-optimization/80463
        * g++.dg/pr80463.C: Add -w to dg-options.

--- gcc/testsuite/g++.dg/pr80463.C.jj   2018-04-09 20:15:47.226631780 +0200
+++ gcc/testsuite/g++.dg/pr80463.C      2018-04-09 20:19:43.783616136 +0200
@@ -1,5 +1,5 @@
 /* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
-/* { dg-options "-g -fselective-scheduling2 -O2 -fvar-tracking-assignments" } 
+/* { dg-options "-g -fselective-scheduling2 -O2 -fvar-tracking-assignments -w" 
} */
 int *a;
 int b, c;


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