[Bug 1815057] Re: [UBUNTU] GCC Wrong code generate for floating point workloads Ubuntu 18.04
Launchpad Bug Tracker
1815057 at bugs.launchpad.net
Mon Apr 29 19:17:12 UTC 2019
This bug was fixed in the package gcc-7 - 7.4.0-1ubuntu1~18.04
---------------
gcc-7 (7.4.0-1ubuntu1~18.04) bionic-proposed; urgency=medium
* SRU: LP: #1814369.
* Fix target/88856, taken from the gcc-7-branch. LP: #1815057.
* Fix PR tree-optimization/89505, taken from the gcc-8 branch.
gcc-7 (7.4.0-1ubuntu1) disco; urgency=medium
* Merge with Debian; remaining changes:
- Build from upstream sources.
gcc-7 (7.4.0-1) unstable; urgency=medium
* GCC 7.4.0 release.
* Back-out the gcc-search-prefixed-as-ld patch. See #915194.
gcc-7 (7.3.0-31ubuntu1) disco; urgency=medium
* Merge with Debian; remaining changes:
- Build from upstream sources.
gcc-7 (7.3.0-31) unstable; urgency=medium
* GCC 7.4.0 release candidate 1.
* Update to SVN 20181129 (r266612) from the gcc-7-branch.
- Fix PR libstdc++/88199, PR libstdc++/87822, PR tree-optimization/79351,
PR bootstrap/81033, PR target/81733, PR target/52795,
PR middle-end/87645, PR middle-end/87610, PR tree-optimization/87665,
PR tree-optimization/87745, PR tree-optimization/87665,
PR middle-end/86139, PR middle-end/86076, PR target/88051 (x86),
PR target/82961, PR target/87867 (ARM), PR tree-optimization/84777,
PR rtl-optimization/84003, PR target/87853 (x86), PR target/87928 (x86),
PR rtl-optimization/85925, PR debug/88006, PR debug/87462,
PR middle-end/58372, PR c++/84281, PR c++/87075, PR fortran/88073,
PR fortran/88143, PR fortran/87597.
* Backport the libstdc++ mersenne twister optimization for AArch64, so that
the random header is the same on all architectures (Ubuntu only).
LP: #1799955.
* Fix VCS attribute in the control file. Addresses: #912405.
gcc-7 (7.3.0-30ubuntu1) disco; urgency=medium
* Backport the libstdc++ mersenne twister optimization for AArch64, so that
the random header is the same on all architectures (Ubuntu only).
LP: #1799955.
gcc-7 (7.3.0-30) unstable; urgency=medium
* Update to SVN 20181030 (r265622) from the gcc-7-branch.
- Fix PR middle-end/86542, PR middle-end/86539, PR middle-end/86660,
PR libstdc++/87749, PR libstdc++/87704, PR libstdc++/79433,
PR libstdc++/87641, PR libstdc++/86751, PR libstdc++/78595,
PR libstdc++/87061, PR libstdc++/70966, PR libstdc++/77854,
PR libstdc++/87538, PR tree-optimization/87473, PR middle-end/87623,
PR target/87511 (AArch64), PR target/87550 (x86), PR middle-end/87248,
PR rtl-optimization/87065, PR middle-end/86627, PR middle-end/86542,
PR middle-end/86539, PR middle-end/86660, PR middle-end/87024,
PR middle-end/86505, PR target/87370 (x86), PR target/87517 (x86),
PR target/87522 (x86), PR other/87353, PR target/87467 (x86),
PR target/87033 (PPC), PR debug/86687, PR c++/3698, PR c++/86208,
PR fortran/86421.
* Don't configure native builds with --with-sysroot. Apparently this cannot
be completely overridden with the command line option --sysroot.
* Update VCS attributes in the control file.
gcc-7 (7.3.0-29) unstable; urgency=medium
* Update to SVN 20180904 (r264075) from the gcc-7-branch.
- Fix PR sanitizer/86022, PR tree-optimization/85859, PR target/86662,
PR target/87014 (x86), PR c++/86763.
gcc-7 (7.3.0-28ubuntu1) cosmic; urgency=medium
* Merge with Debian; remaining changes:
- Build from upstream sources.
gcc-7 (7.3.0-28) unstable; urgency=medium
* Update to SVN 20180814 (r264534) from the gcc-7-branch.
- Fix PR libstdc++/86138, PR libstdc++/85672, PR libstdc++/84654,
PR libstdc++/80893, PR libstdc++/80893, PR libstdc++/68519,
PR libstdc++/86292, PR libstdc++/60555, PR libstdc++/86861,
PR libstdc++/86734, PR rtl-optimization/85645, PR rtl-optimization/85645,
PR target/86197 (PPC), PR middle-end/86705, PR c++/86728.
- Fix PR bootstrap/86724. Closes: #905539.
[ Matthias Klose ]
* Add some basic autopkg tests for Ada, C, C++, Go, OpenMP and Fortran.
* Build again using gnat-7.
[ Nicolas Boulenguez ]
* gnat: Improve the ada-gcc-name patch.
gcc-7 (7.3.0-27ubuntu1) cosmic; urgency=medium
* Merge with Debian; remaining changes:
- Build from upstream sources.
-- Matthias Klose <doko at ubuntu.com> Mon, 01 Apr 2019 09:44:57 +0200
--
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https://bugs.launchpad.net/bugs/1815057
Title:
[UBUNTU] GCC Wrong code generate for floating point workloads Ubuntu
18.04
Status in Ubuntu on IBM z Systems:
Fix Committed
Status in gcc-7 package in Ubuntu:
Fix Released
Status in gcc-8 package in Ubuntu:
Fix Released
Status in gcc-7 source package in Bionic:
Fix Released
Status in gcc-8 source package in Bionic:
Fix Released
Status in gcc-7 source package in Cosmic:
Fix Released
Status in gcc-8 source package in Cosmic:
Fix Released
Bug description:
An IBM Z GCC backend problem leads to wrong code being generated for
some floating point workloads.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88856
A patch has been committed to the GCC 7 and 8 upstream branch and
needs to be picked up for the Ubuntu 18.04 compiler.
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=268551
This change might require rebuilding floating point related packages.
Although the actual problem is hard to trigger. I could only reproduce
it in case if conversion introduces load on condition instructions in
the ce2 pass. The testcase I've looked into came from the python scipy
package which builds with -funroll-loops. The load on condition
opportunity in that case was introduced with the RTL loop unrolling.
This made the split1 pass to use the problematic splitter generating
wrong code in the end.
According to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=915738
The patch has been picked up for gcc-8 8.2.0-18 already
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