Here we crash because we attempt to % by 0. Thus fixed. While at it, I've moved the -Wclass-memaccess tests into warn/. I've checked that the # of expected passes is the same before/after the move.
Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk? PR c++/105634 gcc/cp/ChangeLog: * call.cc (maybe_warn_class_memaccess): Avoid % by zero. gcc/testsuite/ChangeLog: * g++.dg/Wclass-memaccess-2.C: Moved to... * g++.dg/warn/Wclass-memaccess-2.C: ...here. * g++.dg/Wclass-memaccess-3.C: Moved to... * g++.dg/warn/Wclass-memaccess-3.C: ...here. * g++.dg/Wclass-memaccess-4.C: Moved to... * g++.dg/warn/Wclass-memaccess-4.C: ...here. * g++.dg/Wclass-memaccess-5.C: Moved to... * g++.dg/warn/Wclass-memaccess-5.C: ...here. * g++.dg/Wclass-memaccess-6.C: Moved to... * g++.dg/warn/Wclass-memaccess-6.C: ...here. * g++.dg/Wclass-memaccess.C: Moved to... * g++.dg/warn/Wclass-memaccess.C: ...here. * g++.dg/warn/Wclass-memaccess-7.C: New test. --- gcc/cp/call.cc | 2 ++ .../g++.dg/{ => warn}/Wclass-memaccess-2.C | 0 .../g++.dg/{ => warn}/Wclass-memaccess-3.C | 0 .../g++.dg/{ => warn}/Wclass-memaccess-4.C | 0 .../g++.dg/{ => warn}/Wclass-memaccess-5.C | 0 .../g++.dg/{ => warn}/Wclass-memaccess-6.C | 0 gcc/testsuite/g++.dg/warn/Wclass-memaccess-7.C | 13 +++++++++++++ gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess.C | 0 8 files changed, 15 insertions(+) rename gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess-2.C (100%) rename gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess-3.C (100%) rename gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess-4.C (100%) rename gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess-5.C (100%) rename gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess-6.C (100%) create mode 100644 gcc/testsuite/g++.dg/warn/Wclass-memaccess-7.C rename gcc/testsuite/g++.dg/{ => warn}/Wclass-memaccess.C (100%) diff --git a/gcc/cp/call.cc b/gcc/cp/call.cc index 0240e364324..14c6037729f 100644 --- a/gcc/cp/call.cc +++ b/gcc/cp/call.cc @@ -10329,6 +10329,8 @@ maybe_warn_class_memaccess (location_t loc, tree fndecl, /* Finally, warn on partial copies. */ unsigned HOST_WIDE_INT typesize = tree_to_uhwi (TYPE_SIZE_UNIT (desttype)); + if (typesize == 0) + break; if (unsigned HOST_WIDE_INT partial = tree_to_uhwi (sz) % typesize) warned = warning_at (loc, OPT_Wclass_memaccess, (typesize - partial > 1 diff --git a/gcc/testsuite/g++.dg/Wclass-memaccess-2.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-2.C similarity index 100% rename from gcc/testsuite/g++.dg/Wclass-memaccess-2.C rename to gcc/testsuite/g++.dg/warn/Wclass-memaccess-2.C diff --git a/gcc/testsuite/g++.dg/Wclass-memaccess-3.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-3.C similarity index 100% rename from gcc/testsuite/g++.dg/Wclass-memaccess-3.C rename to gcc/testsuite/g++.dg/warn/Wclass-memaccess-3.C diff --git a/gcc/testsuite/g++.dg/Wclass-memaccess-4.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-4.C similarity index 100% rename from gcc/testsuite/g++.dg/Wclass-memaccess-4.C rename to gcc/testsuite/g++.dg/warn/Wclass-memaccess-4.C diff --git a/gcc/testsuite/g++.dg/Wclass-memaccess-5.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-5.C similarity index 100% rename from gcc/testsuite/g++.dg/Wclass-memaccess-5.C rename to gcc/testsuite/g++.dg/warn/Wclass-memaccess-5.C diff --git a/gcc/testsuite/g++.dg/Wclass-memaccess-6.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-6.C similarity index 100% rename from gcc/testsuite/g++.dg/Wclass-memaccess-6.C rename to gcc/testsuite/g++.dg/warn/Wclass-memaccess-6.C diff --git a/gcc/testsuite/g++.dg/warn/Wclass-memaccess-7.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-7.C new file mode 100644 index 00000000000..7e86b248629 --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wclass-memaccess-7.C @@ -0,0 +1,13 @@ +// PR c++/105634 +// { dg-do compile { target { c++11 } } } +// { dg-options "-Wall" } + +struct s +{ + struct {} a[] = 1.0; // { dg-error "" } + void f (char *c) + { + s s; + __builtin_memcpy (&s, c, sizeof(s)); + } +}; diff --git a/gcc/testsuite/g++.dg/Wclass-memaccess.C b/gcc/testsuite/g++.dg/warn/Wclass-memaccess.C similarity index 100% rename from gcc/testsuite/g++.dg/Wclass-memaccess.C rename to gcc/testsuite/g++.dg/warn/Wclass-memaccess.C base-commit: c9852156dd2fedec130f6d8eb669579ef6237946 -- 2.36.1