https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117951
Bug ID: 117951
Summary: FAIL: 20_util/variant/run.cc -std=gnu++17 (test for
excess errors)
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: danglin at gcc dot gnu.org
Target Milestone: ---
Created attachment 59815
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59815&action=edit
Preprocessed source.
spawn -ignore SIGHUP /home/dave/gnu/gcc/objdir/./gcc/xg++ -shared-libgcc
-B/home
/dave/gnu/gcc/objdir/./gcc -nostdinc++
-L/home/dave/gnu/gcc/objdir/hppa-linux-gn
u/libstdc++-v3/src
-L/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/src/.
libs -L/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/
home/dave/opt/gnu/gcc/gcc-15/hppa-linux-gnu/bin/
-B/home/dave/opt/gnu/gcc/gcc-15
/hppa-linux-gnu/lib/ -isystem
/home/dave/opt/gnu/gcc/gcc-15/hppa-linux-gnu/inclu
de -isystem /home/dave/opt/gnu/gcc/gcc-15/hppa-linux-gnu/sys-include
-fchecking=
1 -B/home/dave/gnu/gcc/objdir/hppa-linux-gnu/./libstdc++-v3/src/.libs
-fmessage-
length=0 -fno-show-column -ffunction-sections -fdata-sections -g -O2
-D_GNU_SOUR
CE -DLOCALEDIR="." -nostdinc++
-I/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstd
c++-v3/include/hppa-linux-gnu
-I/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc
++-v3/include -I/home/dave/gnu/gcc/gcc/libstdc++-v3/libsupc++
-I/home/dave/gnu/g
cc/gcc/libstdc++-v3/include/backward
-I/home/dave/gnu/gcc/gcc/libstdc++-v3/tests
uite/util /home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/20_util/variant/run.cc
-
std=gnu++17 -include bits/stdc++.h -fdiagnostics-plain-output ./libtestc++.a
-Wl
,--gc-sections
-L/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/src/files
ystem/.libs
-L/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/src/experime
ntal/.libs -lm -o ./run.exe
In file included from
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/incl
ude/vector:67,
from
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/incl
ude/functional:66,
from
/home/dave/gnu/gcc/gcc/libstdc++-v3/include/precompiled/st
dc++.h:55:
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitial
ized.h: In destructor 'std::_UninitDestroyGuard<_ForwardIterator,
_Alloc>::~_Uni
nitDestroyGuard() [with _ForwardIterator = int*; _Alloc =
__gnu_cxx::throw_alloc
ator_limit<int>]':
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitial
ized.h:95: error: unable to find a register to spill
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitial
ized.h:95: error: this is the insn:
(insn 95 950 96 6 (set (mem/f/c:SI (reg/f:SI 315) [152 MEM[(struct
_Rb_tree_head
er *)&_S_map + 4B]._M_header._M_right+0 S4 A32])
(reg/f:SI 316))
"/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/i
nclude/bits/stl_tree.h":208:26 42 {*pa.md:2195}
(expr_list:REG_DEAD (reg/f:SI 316)
(expr_list:REG_DEAD (reg/f:SI 315)
(nil))))
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitial
ized.h:95: confused by earlier errors, bailing out
compiler exited with status 1
FAIL: 20_util/variant/run.cc -std=gnu++17 (test for excess errors)
Excess errors:
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitialized.h:95:
error: unable to find a register to spill
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitialized.h:95:
error: this is the insn:
(insn 95 950 96 6 (set (mem/f/c:SI (reg/f:SI 315) [152 MEM[(struct
_Rb_tree_header *)&_S_map + 4B]._M_header._M_right+0 S4 A32])
(reg/f:SI 316))
"/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_tree.h":208:26
42 {*pa.md:2195}
(expr_list:REG_DEAD (reg/f:SI 316)
(expr_list:REG_DEAD (reg/f:SI 315)
(nil))))
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_uninitialized.h:95:
confused by earlier errors, bailing out
Test compiles successfully at -O1.
I think this is an RTL sharing issue. We have in ipa pass:
(insn 85 44 92 4 (set (reg/f:SI 287)
(plus:SI (reg/f:SI 280)
(const_int 4 [0x4])))
"/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libs
tdc++-v3/include/bits/stl_tree.h":207:25 120 {addsi3}
(expr_list:REG_EQUIV (const:SI (plus:SI (symbol_ref/i:SI
("_ZZN9__gnu_cxx13
annotate_base13map_constructEvE6_S_map") [flags 0x202] <var_decl 0xf81d6898
_S_
map>)
(const_int 4 [0x4])))
(nil)))
[...]
(insn 86 114 87 6 (set (mem/f/c:SI (plus:SI (reg/f:SI 280)
(const_int 12 [0xc])) [152 MEM[(struct _Rb_tree_header
*)&_S_map + 4B]._M_header._M_left+0 S4 A32])
(reg/f:SI 287))
"/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_tree.h":207:25
42 {*pa.md:2195}
(nil))
(debug_insn 87 86 95 6 (debug_marker)
"/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_tree.h":208:7
-1
(nil))
(insn 95 87 96 6 (set (mem/f/c:SI (reg/f:SI 288) [152 MEM[(struct
_Rb_tree_header *)&_S_map + 4B]._M_header._M_right+0 S4 A32])
(reg/f:SI 287))
"/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/bits/stl_tree.h":208:26
42 {*pa.md:2195}
(nil))
I suspect reload fails because there are two sets using reg/f:SI 287.
Compile command is:
/home/dave/gnu/gcc/objdir/./gcc/cc1plus -fpreprocessed ./run-run.ii -quiet -da
-dumpdir ./run- -dumpbase run.cc -dumpbase-ext .cc -g -O2 -std=gnu++17 -version
-fdiagnostics-color=never -fdiagnostics-urls=never -fchecking=1
-fmessage-length=0 -fno-show-column -ffunction-sections -fdata-sections
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-path-format=separate-events -fdiagnostics-text-art-charset=none
-fno-diagnostics-show-event-links -o ./run-run.s -mlra
