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| author | Jason Merrill <jason@redhat.com> | 2015-04-15 17:17:29 -0400 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2015-04-15 17:17:29 -0400 |
| commit | 58cc255ca031b2e0f5da7646347021248cc48805 (patch) | |
| tree | 7ece978236340d6784aa4b3997ddc119b2cb5fd1 /gcc/cp/decl.c | |
| parent | efb5e8170a77bb24bab9eb6f3331d815e255c8ee (diff) | |
| download | gcc-58cc255ca031b2e0f5da7646347021248cc48805.zip gcc-58cc255ca031b2e0f5da7646347021248cc48805.tar.gz gcc-58cc255ca031b2e0f5da7646347021248cc48805.tar.bz2 | |
constexpr.c (cxx_eval_store_expression): Ignore clobbers.
* constexpr.c (cxx_eval_store_expression): Ignore clobbers.
(build_constexpr_constructor_member_initializers): Loop to find
the BIND_EXPR.
* decl.c (start_preparsed_function): Clobber the object at the
beginning of a constructor.
From-SVN: r222135
Diffstat (limited to 'gcc/cp/decl.c')
| -rw-r--r-- | gcc/cp/decl.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c index 0538570..965f07c 100644 --- a/gcc/cp/decl.c +++ b/gcc/cp/decl.c @@ -13708,6 +13708,20 @@ start_preparsed_function (tree decl1, tree attrs, int flags) store_parm_decls (current_function_parms); + if (!processing_template_decl + && flag_lifetime_dse && DECL_CONSTRUCTOR_P (decl1)) + { + /* Insert a clobber to let the back end know that the object storage + is dead when we enter the constructor. */ + tree btype = CLASSTYPE_AS_BASE (current_class_type); + tree clobber = build_constructor (btype, NULL); + TREE_THIS_VOLATILE (clobber) = true; + tree bref = build_nop (build_reference_type (btype), current_class_ptr); + bref = convert_from_reference (bref); + tree exprstmt = build2 (MODIFY_EXPR, btype, bref, clobber); + finish_expr_stmt (exprstmt); + } + return true; } |