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[Bug bootstrap/81150] New: [8 Regression] GCC is miscompiled with -O3
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 21 Jun 2017 11:00:01 +0000
- Subject: [Bug bootstrap/81150] New: [8 Regression] GCC is miscompiled with -O3
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81150
Bug ID: 81150
Summary: [8 Regression] GCC is miscompiled with -O3
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
On Linux/x86-64, I saw
20083 hjl 20 0 69400 1488 1340 R 199.7 0.0 505:16.72 fib.exe
6288 hjl 20 0 64288 2652 2328 R 100.0 0.0 246:38.57
fib-opr-overloa
21594 hjl 20 0 64284 2736 2416 R 100.0 0.0 278:27.75
fib-opr-overloa
1181 hjl 20 0 64288 1512 1368 R 99.7 0.0 223:01.07
fib-opr-overloa
Executing on host: /export/gnu/import/git/gcc-test/bld/gcc/xgcc
-B/export/gnu/import/git/gcc-test/bld/gcc/
/export/gnu/import/git/gcc-test/src-trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/fib.c
-m32
-B/export/gnu/import/git/gcc-test/bld/x86_64-pc-linux-gnu/32/libcilkrts/
-L/export/gnu/import/git/gcc-test/bld/x86_64-pc-linux-gnu/32/libcilkrts/.libs
-fno-diagnostics-show-caret -fdiagnostics-color=never -g -fcilkplus -lm -o
./fib.exe (timeout = 300)
spawn -ignore SIGHUP /export/gnu/import/git/gcc-test/bld/gcc/xgcc
-B/export/gnu/import/git/gcc-test/bld/gcc/
/export/gnu/import/git/gcc-test/src-trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/fib.c
-m32 -B/export/gnu/import/git/gcc-test/bld/x86_64-pc-linux-gnu/32/libcilkrts/
-L/export/gnu/import/git/gcc-test/bld/x86_64-pc-linux-gnu/32/libcilkrts/.libs
-fno-diagnostics-show-caret -fdiagnostics-color=never -g -fcilkplus -lm -o
./fib.exe
when running GCC testsuite with r249394 when configured with
--prefix=/usr/8.0.0 --enable-clocale=gnu --with-system-zlib --enable-shared
--with-demangler-in-ld --enable-libmpx --with-build-config='bootstrap-O3
bootstrap-debug' --disable-werror --with-fpmath=sse