diff options
| author | Marc Glisse <marc.glisse@inria.fr> | 2013-10-03 18:13:54 +0200 |
|---|---|---|
| committer | Marc Glisse <glisse@gcc.gnu.org> | 2013-10-03 16:13:54 +0000 |
| commit | 2284b03444d6845ce6402db37f4ec43f6c755f77 (patch) | |
| tree | 626a1783dbadedeb04e9dc7b74807b9ad23cc8c7 /gcc/fold-const.c | |
| parent | 0609bdf2114919b570e7a3c4ab273fdf16262a4b (diff) | |
| download | gcc-2284b03444d6845ce6402db37f4ec43f6c755f77.zip gcc-2284b03444d6845ce6402db37f4ec43f6c755f77.tar.gz gcc-2284b03444d6845ce6402db37f4ec43f6c755f77.tar.bz2 | |
re PR c++/19476 (Missed null checking elimination with new)
2013-10-03 Marc Glisse <marc.glisse@inria.fr>
PR c++/19476
gcc/c-family/
* c.opt (fcheck-new): Move to common.opt.
gcc/
* common.opt (fcheck-new): Moved from c.opt. Make it 'Common'.
* calls.c (alloca_call_p): Use get_callee_fndecl.
* fold-const.c (tree_expr_nonzero_warnv_p): Handle operator new.
* tree-vrp.c (gimple_stmt_nonzero_warnv_p, stmt_interesting_for_vrp):
Likewise.
(vrp_visit_stmt): Remove duplicated code.
gcc/testsuite/
* g++.dg/tree-ssa/pr19476-1.C: New file.
* g++.dg/tree-ssa/pr19476-2.C: Likewise.
* g++.dg/tree-ssa/pr19476-3.C: Likewise.
* g++.dg/tree-ssa/pr19476-4.C: Likewise.
From-SVN: r203163
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index fc29291..03d62f5 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -16222,7 +16222,15 @@ tree_expr_nonzero_warnv_p (tree t, bool *strict_overflow_p) strict_overflow_p); case CALL_EXPR: - return alloca_call_p (t); + { + tree fndecl = get_callee_fndecl (t); + if (!fndecl) return false; + if (flag_delete_null_pointer_checks && !flag_check_new + && DECL_IS_OPERATOR_NEW (fndecl) + && !TREE_NOTHROW (fndecl)) + return true; + return alloca_call_p (t); + } default: break; |