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Bug 1502794

Summary:	Backport a few wrong-code fixes
Product:	Red Hat Enterprise Linux 7	Reporter:	Marek Polacek <mpolacek>
Component:	gcc	Assignee:	Marek Polacek <mpolacek>
Status:	CLOSED ERRATA	QA Contact:	Michael Petlan <mpetlan>
Severity:	unspecified	Docs Contact:	Vladimír Slávik <vslavik>
Priority:	unspecified
Version:	7.5	CC:	jakub, mcermak, mpolacek, ohudlick, vslavik
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	gcc-4.8.5-22.el7	Doc Type:	No Doc Update
Doc Text:	undefined	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-10 15:09:27 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Marek Polacek 2017-10-16 17:16:36 UTC

This is a BZ to track several backports from the gcc-5-branch.

Preliminary list:
r253734 - PR82274, libgcc parts
r252926 - PR80362, PR68528, PR64516 (fold-const.c parts)
r249707 - PR80692
r248662 - PR80129
r248635 - PR77767
r248626 - PR78416
r248623 - PR78378 (minus formatting)

Comment 2 Marek Polacek 2017-10-16 17:50:46 UTC

Also r248608.

Comment 7 Michael Petlan 2018-02-20 13:29:17 UTC

All related tests passed with gcc-4.8.5-28.el7, except that on aarch64, there were the following FAILs:

FAIL: g++.dg/torture/pr68184.C  -O2 -flto -flto-partition=none  (test for excess errors)
UNRESOLVED: g++.dg/torture/pr68184.C  -O2 -flto -flto-partition=none  compilation failed to produce executable
FAIL: g++.dg/torture/pr68184.C  -O2 -flto  (test for excess errors)
UNRESOLVED: g++.dg/torture/pr68184.C  -O2 -flto  compilation failed to produce executable

gcc.sum:FAIL: gcc.dg/torture/pr80362.c  -O2 -flto -flto-partition=none  (test for excess errors)
gcc.sum:UNRESOLVED: gcc.dg/torture/pr80362.c  -O2 -flto -flto-partition=none  compilation failed to produce executable
gcc.sum:FAIL: gcc.dg/torture/pr80362.c  -O2 -flto  (test for excess errors)
gcc.sum:UNRESOLVED: gcc.dg/torture/pr80362.c  -O2 -flto  compilation failed to produce executable

gcc.sum:FAIL: gcc.dg/torture/pr78416.c  -O2 -flto -flto-partition=none  (test for excess errors)
gcc.sum:UNRESOLVED: gcc.dg/torture/pr78416.c  -O2 -flto -flto-partition=none  compilation failed to produce executable
gcc.sum:FAIL: gcc.dg/torture/pr78416.c  -O2 -flto  (test for excess errors)
gcc.sum:UNRESOLVED: gcc.dg/torture/pr78416.c  -O2 -flto  compilation failed to produce executable

gcc.sum:FAIL: gcc.c-torture/execute/pr77767.c compilation,  -O2 -flto -flto-partition=none
gcc.sum:UNRESOLVED: gcc.c-torture/execute/pr77767.c execution,  -O2 -flto -flto-partition=none
gcc.sum:FAIL: gcc.c-torture/execute/pr77767.c compilation,  -O2 -flto 
gcc.sum:UNRESOLVED: gcc.c-torture/execute/pr77767.c execution,  -O2 -flto

gcc.sum:FAIL: gcc.c-torture/execute/pr78378.c compilation,  -O2 -flto -flto-partition=none
gcc.sum:UNRESOLVED: gcc.c-torture/execute/pr78378.c execution,  -O2 -flto -flto-partition=none
gcc.sum:FAIL: gcc.c-torture/execute/pr78378.c compilation,  -O2 -flto
gcc.sum:UNRESOLVED: gcc.c-torture/execute/pr78378.c execution,  -O2 -flto 

g++.sum:FAIL: g++.dg/torture/pr80129.C  -O2 -flto -flto-partition=none  (test for excess errors)
g++.sum:UNRESOLVED: g++.dg/torture/pr80129.C  -O2 -flto -flto-partition=none  compilation failed to produce executable
g++.sum:FAIL: g++.dg/torture/pr80129.C  -O2 -flto  (test for excess errors)
g++.sum:UNRESOLVED: g++.dg/torture/pr80129.C  -O2 -flto  compilation failed to produce executable

All of the above fails look like the following:

Executing on host: /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/xgcc -B/mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8
.5-20150702/obj-aarch64-redhat-linux/gcc/ /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/gcc/testsuite/gcc.c-torture/execute/pr78378.c  -fno-diagnostics-show-caret -fdiagnostics-color=never  -w  -O2 -flto -flto-partition=none   -lm   -o /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/testsuite/gcc3/pr78378.x7    (timeout = 300)
spawn -ignore SIGHUP /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/xgcc -B/mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/ /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/gcc/testsuite/gcc.c-torture/execute/pr78378.c -fno-diagnostics-show-caret -fdiagnostics-color=never -w -O2 -flto -flto-partition=none -lm -o /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/testsuite/gcc3/pr78378.x7
/usr/bin/ld: /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/liblto_plugin.so: error loading plugin: /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/liblto_plugin.so: cannot restore segment prot after reloc: Permission denied
collect2: error: ld returned 1 exit status
compiler exited with status 1
output is:
/usr/bin/ld: /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/liblto_plugin.so: error loading plugin: /mnt/tests/tools/gcc/Sanity/upstream-suite2/TMP/my_rpmbuild/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/gcc/liblto_plugin.so: cannot restore segment prot after reloc: Permission denied
collect2: error: ld returned 1 exit status

In my opinion they are not a big deal, however pasting it here to not lose it. In case the fails might be a problem, let's file another bug for it.

I think we can move this to VERIFIED.

Comment 10 errata-xmlrpc 2018-04-10 15:09:27 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:0849