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from 67cd2a40717 PR libstdc++/80675, PR libstdc++/80940 new a0857425eb9 Backported from mainline 2017-06-13 Jakub Jelinek <jaku [...] new 265c0628119 Backported from mainline 2017-06-13 Jakub Jelinek <jaku [...] new bf15ad539cb Backported from mainline 2017-06-20 Jakub Jelinek <jaku [...]

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Summary of changes: gcc/ChangeLog | 31 ++++++++++++ gcc/cp/ChangeLog | 14 ++++++ gcc/cp/cp-gimplify.c | 16 ++++++- gcc/testsuite/ChangeLog | 19 ++++++++ gcc/testsuite/g++.dg/opt/nrv18.C | 12 +++++ .../g++.dg/{cpp1y/pr77739.C => ubsan/pr80973.C} | 5 +- gcc/testsuite/g++.dg/ubsan/pr81111.C | 45 ++++++++++++++++++ gcc/testsuite/g++.dg/ubsan/pr81125.C | 20 ++++++++ gcc/ubsan.c | 55 +++++++++++++++------- gcc/ubsan.h | 13 ++++- 10 files changed, 206 insertions(+), 24 deletions(-) create mode 100644 gcc/testsuite/g++.dg/opt/nrv18.C copy gcc/testsuite/g++.dg/{cpp1y/pr77739.C => ubsan/pr80973.C} (68%) create mode 100644 gcc/testsuite/g++.dg/ubsan/pr81111.C create mode 100644 gcc/testsuite/g++.dg/ubsan/pr81125.C