[Bug lto/81351] New: [8 regression] Many LTO testcases FAIL

[ro at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81351

            Bug ID: 81351
           Summary: [8 regression] Many LTO testcases FAIL
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---
            Target: i386-pc-solaris2.12, sparc-sun-solaris2.12

Between 20170705 (r250005) and 20170706 (r250037), many LTO testcases started
to FAIL on Solaris/SPARC and x86:

+FAIL: g++.dg/lto/20081109 cp_lto_20081109_0.o-cp_lto_20081109_1.o execute -O0
-flto 
+FAIL: g++.dg/lto/20081109 cp_lto_20081109_0.o-cp_lto_20081109_1.o execute -O0
-flto -flto-partition=1to1 
+FAIL: g++.dg/lto/20081109 cp_lto_20081109_0.o-cp_lto_20081109_1.o execute -O0
-flto -flto-partition=none 
+FAIL: g++.dg/lto/20081109 cp_lto_20081109_0.o-cp_lto_20081109_1.o execute -O2
-flto
+FAIL: g++.dg/lto/20081109 cp_lto_20081109_0.o-cp_lto_20081109_1.o execute -O2
-flto -flto-partition=1to1 
+FAIL: g++.dg/lto/20081109 cp_lto_20081109_0.o-cp_lto_20081109_1.o execute -O2
-flto -flto-partition=none 
+FAIL: g++.dg/torture/pr49115.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/pr49115.C   -O2 -flto -flto-partition=none  execution
test
+FAIL: g++.dg/torture/pr60750.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/pr60750.C   -O2 -flto -flto-partition=none  execution
test
+FAIL: g++.dg/torture/pr68184.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/pr68184.C   -O2 -flto -flto-partition=none  execution
test
+FAIL: g++.dg/torture/stackalign/eh-alloca-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-alloca-1.C   -O2 -flto -flto-partition=none
 execution test
+FAIL: g++.dg/torture/stackalign/eh-alloca-1.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-alloca-1.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-fastcall-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-fastcall-1.C   -O2 -flto
-flto-partition=none  execution test
+FAIL: g++.dg/torture/stackalign/eh-fastcall-1.C   -O2 -flto
-flto-partition=none -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-fastcall-1.C   -O2 -flto -fpic execution
test
+FAIL: g++.dg/torture/stackalign/eh-global-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-global-1.C   -O2 -flto -flto-partition=none
 execution test
+FAIL: g++.dg/torture/stackalign/eh-global-1.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-global-1.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-1.C   -O2 -flto -flto-partition=none
 execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-1.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-1.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-2.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-2.C   -O2 -flto -flto-partition=none
 execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-2.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-inline-2.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-thiscall-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-thiscall-1.C   -O2 -flto
-flto-partition=none  execution test
+FAIL: g++.dg/torture/stackalign/eh-thiscall-1.C   -O2 -flto
-flto-partition=none -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-thiscall-1.C   -O2 -flto -fpic execution
test
+FAIL: g++.dg/torture/stackalign/eh-vararg-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-1.C   -O2 -flto -flto-partition=none
 execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-1.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-1.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-2.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-2.C   -O2 -flto -flto-partition=none
 execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-2.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/eh-vararg-2.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/throw-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/throw-1.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/throw-1.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/throw-1.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/throw-2.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/throw-2.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/throw-2.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/throw-2.C   -O2 -flto -fpic execution test
+FAIL: g++.dg/torture/stackalign/throw-3.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/throw-3.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/throw-3.C   -O2 -flto -flto-partition=none
-fpic execution test
+FAIL: g++.dg/torture/stackalign/throw-3.C   -O2 -flto -fpic execution test

  32 and 64-bit sparc, 32-bit x86 only

  e.g. g++.dg/torture/pr49115.C:

terminate called after throwing an instance of 'MyException'
Abort

+FAIL: gnat.dg/lto8.adb execution test

  32 and 64-bit sparc, 32-bit x86 only

+FAIL: g++.dg/torture/stackalign/unwind-0.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-0.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/unwind-1.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-1.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/unwind-2.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-2.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/unwind-3.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-3.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/unwind-4.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-4.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/unwind-5.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-5.C   -O2 -flto -flto-partition=none 
execution test
+FAIL: g++.dg/torture/stackalign/unwind-6.C   -O2 -flto  execution test
+FAIL: g++.dg/torture/stackalign/unwind-6.C   -O2 -flto -flto-partition=none 
execution test

  32-bit x86 only

I'll start a reghunt to identify the culprit, but the most likely candidates
are

changeset:   39310:fb513600eb4c
user:        hubicka@138bc75d-0d04-0410-961f-82ee72b054a4
date:        Thu Jul 06 16:46:47 2017 +0000
files:       gcc/ChangeLog gcc/cgraphunit.c gcc/lto/ChangeLog
gcc/lto/lto-partit
ion.c
description:
* cgraphunit.c (cgraph_node::finalize_function): When
        !flag_toplevel_reorde set no_reorder flag.
        (varpool_node::finalize_decl): Likewise.
        (symbol_table::compile): Drop no toplevel reorder path.

        * lto-partition.c (lto_balanced_map): Do not check
        flag_toplevel_reorder.


changeset:   39311:a2df04e7a94b
user:        hubicka@138bc75d-0d04-0410-961f-82ee72b054a4
date:        Thu Jul 06 16:47:20 2017 +0000
files:       gcc/ChangeLog gcc/lto-wrapper.c
description:
* lto-wrapper.c (merge_and_complain): Do not merge
        fexceptions, fnon_call_exceptions, ftrapv, ffp_contract_, fmath_errno,
        fsigned_zeros, ftrapping_math, fwrapv.
        (append_compiler_options): Do not track these options.
        (append_linker_options): Likewie

  Rainer