From 6a777ceb0e975f0efc823d2d82e676346f068151 Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Wed, 30 Mar 2022 16:04:52 +0200 Subject: [PATCH] testsuite: Change pr80334.C testcase to dg-do compile [PR102772] The testcase has UB at runtime, placement new shouldn't construct an object with certain alignment requirements into an unaligned buffer. 2022-03-30 Jakub Jelinek PR tree-optimization/80334 PR target/102772 * g++.dg/torture/pr80334.C: Change from dg-do run to dg-do compile. --- gcc/testsuite/g++.dg/torture/pr80334.C | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/gcc/testsuite/g++.dg/torture/pr80334.C b/gcc/testsuite/g++.dg/torture/pr80334.C index aee1548..d25b677 100644 --- a/gcc/testsuite/g++.dg/torture/pr80334.C +++ b/gcc/testsuite/g++.dg/torture/pr80334.C @@ -1,4 +1,8 @@ -// { dg-do run } +// This used to be dg-do run testcase, but it is invalid at runtime: +// trying to do a placement new of A which is 16-byte sized and aligned +// into a 16-byte buffer at offset 17 bytes from 16-byte aligned address +// is UB. +// { dg-do compile } struct A { alignas(16) char c; }; struct B { A unpacked; char d; } __attribute__((packed)); -- 2.7.4