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| author | Marek Polacek <polacek@redhat.com> | 2023-01-19 17:12:34 -0500 |
|---|---|---|
| committer | Marek Polacek <polacek@redhat.com> | 2023-01-23 16:41:48 -0500 |
| commit | e3585e6acdfd5c1793f877476647d2521620c95c (patch) | |
| tree | be03840369b1fc4e087b3b97fed693bce71e861d /gcc/cp/init.cc | |
| parent | 72e46b3c7ad5e3d2c69868a510c00707c356106a (diff) | |
| download | gcc-e3585e6acdfd5c1793f877476647d2521620c95c.zip gcc-e3585e6acdfd5c1793f877476647d2521620c95c.tar.gz gcc-e3585e6acdfd5c1793f877476647d2521620c95c.tar.bz2 | |
c++: Quash bogus -Wunused-value with new [PR107797]
We shouldn't emit "right operand of comma operator has no effect"
when that comma operator was created by the compiler for "new int{}".
convert_to_void/COMPOUND_EXPR already checks warning_suppressed_p so
we can just suppress -Wunused-value.
PR c++/107797
gcc/cp/ChangeLog:
* cvt.cc (ocp_convert): copy_warning when creating a new
COMPOUND_EXPR.
* init.cc (build_new_1): Suppress -Wunused-value on
compiler-generated COMPOUND_EXPRs.
gcc/testsuite/ChangeLog:
* g++.dg/warn/Wunused-value-1.C: New test.
Diffstat (limited to 'gcc/cp/init.cc')
| -rw-r--r-- | gcc/cp/init.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/cp/init.cc b/gcc/cp/init.cc index f816c47..52e96fb 100644 --- a/gcc/cp/init.cc +++ b/gcc/cp/init.cc @@ -3800,6 +3800,8 @@ build_new_1 (vec<tree, va_gc> **placement, tree type, tree nelts, if (cookie_expr) rval = build2 (COMPOUND_EXPR, TREE_TYPE (rval), cookie_expr, rval); + suppress_warning (rval, OPT_Wunused_value); + if (rval == data_addr && TREE_CODE (alloc_expr) == TARGET_EXPR) /* If we don't have an initializer or a cookie, strip the TARGET_EXPR and return the call (which doesn't need to be adjusted). */ |