This bug was fixed in the package gcc-4.8 - 4.8.5-2ubuntu1
---------------
gcc-4.8 (4.8.5-2ubuntu1) xenial; urgency=medium
* Merge with Debian; remaining changes:
- Build from the upstream source.
gcc-4.8 (4.8.5-2) unstable; urgency=medium
* Update the Linaro support to the 4.8-2015.07 release.
* Adjust setting DH_COMPAT for dh_movefiles with updated debhelper supporting
globbing of arguments. Closes: #800248.
* Fix PR libstdc++/56158, taken from the trunk.
Addresses: #804521. LP: #1514309.
* Backport fixes to allow building with cloog-0.18.4 and isl-0.15.
* Backport PR target/67281 from the trunk (HTM fixes). LP: #1517093.
* Fix auto-loading of gdb pretty printers. LP: #1446828.
-- Matthias Klose <d...@ubuntu.com> Wed, 18 Nov 2015 19:57:42 +0100
** Changed in: gcc-4.8 (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1517093
Title:
HTM builtins aren't treated as compiler barriers on powerpc
Status in gcc-4.8 package in Ubuntu:
Fix Released
Status in gcc-5 package in Ubuntu:
Fix Released
Status in gcc-4.8 source package in Trusty:
Confirmed
Bug description:
---Problem Description---
HTM builtins aren't treated as compiler barriers on powerpc
Contact Information = berg...@us.ibm.com
---Steps to Reproduce---
This bug is a mirror of the (fixed) upstream FSF bugzilla
https://gcc.gnu.org/PR67281
All relevant information regarding the bug and the fix can be found there.
This bugzilla is to track backporting of the fix to the GCC 4.8, 4.9 and 5
based compilers.
Userspace tool common name: GCC
Userspace rpm: gcc-4.8, gcc-4.9 and gcc-5
== Comment: #1
The fix for the FSF GCC 5 branch was committed with:
r228846 | bergner | 2015-10-15 11:38:47 -0500 (Thu, 15 Oct 2015) | 16
lines
Backport from mainline
2015-10-14 Peter Bergner <berg...@vnet.ibm.com>
Torvald Riegel <trie...@redhat.com>
PR target/67281
* config/rs6000/htm.md (UNSPEC_HTM_FENCE): New.
(tabort, tabort<wd>c, tabort<wd>ci, tbegin, tcheck, tend,
trechkpt, treclaim, tsr, ttest): Rename define_insns from this...
(*tabort, *tabort<wd>c, *tabort<wd>ci, *tbegin, *tcheck, *tend,
*trechkpt, *treclaim, *tsr, *ttest): ...to this. Add memory barrier.
(tabort, tabort<wd>c, tabort<wd>ci, tbegin, tcheck, tend,
trechkpt, treclaim, tsr, ttest): New define_expands.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Define
__TM_FENCE__ for htm.
* doc/extend.texi: Update documentation for htm builtins.
== Comment: #2
The fix for the FSF GCC 4.9 branch was committed with:
r228847 | bergner | 2015-10-15 11:40:14 -0500 (Thu, 15 Oct 2015) | 16
lines
Backport from mainline
2015-10-14 Peter Bergner <berg...@vnet.ibm.com>
Torvald Riegel <trie...@redhat.com>
PR target/67281
* config/rs6000/htm.md (UNSPEC_HTM_FENCE): New.
(tabort, tabort<wd>c, tabort<wd>ci, tbegin, tcheck, tend,
trechkpt, treclaim, tsr, ttest): Rename define_insns from this...
(*tabort, *tabort<wd>c, *tabort<wd>ci, *tbegin, *tcheck, *tend,
*trechkpt, *treclaim, *tsr, *ttest): ...to this. Add memory barrier.
(tabort, tabort<wd>c, tabort<wd>ci, tbegin, tcheck, tend,
trechkpt, treclaim, tsr, ttest): New define_expands.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Define
__TM_FENCE__ for htm.
* doc/extend.texi: Update documentation for htm builtins.
== Comment: #3
Since the FSF 4.8 branch is closed, here is a backport of the fix along with
another
simple HTM wrong code bug to GCC 4.8.
Backport from mainline
2015-10-14 Peter Bergner <berg...@vnet.ibm.com>
Torvald Riegel <trie...@redhat.com>
PR target/67281
* config/rs6000/htm.md (UNSPEC_HTM_FENCE): New.
(tabort, tabort<wd>c, tabort<wd>ci, tbegin, tcheck, tend,
trechkpt, treclaim, tsr, ttest): Rename define_insns from this...
(*tabort, *tabort<wd>c, *tabort<wd>ci, *tbegin, *tcheck, *tend,
*trechkpt, *treclaim, *tsr, *ttest): ...to this. Add memory barrier.
(tabort, tabort<wd>c, tabort<wd>ci, tbegin, tcheck, tend,
trechkpt, treclaim, tsr, ttest): New define_expands.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Define
__TM_FENCE__ for htm.
* doc/extend.texi: Update documentation for htm builtins.
Backport from mainline:
2015-08-03 Peter Bergner <berg...@vnet.ibm.com>
* config/rs6000/htm.md (tabort.): Restrict the source operand to
using a base register.
Acceptance creterium: No regressions in the testsuite, and the new
test passes.
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