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| author | Martin Sebor <msebor@redhat.com> | 2021-11-19 09:44:31 -0700 |
|---|---|---|
| committer | Martin Sebor <msebor@redhat.com> | 2021-11-19 09:47:57 -0700 |
| commit | 16137fbb9256ef365dd498d39024eb33de1a4cd8 (patch) | |
| tree | 27fd0ecb6e5cdf0b6d36a242539bfbbcd4a73df1 /gcc/c | |
| parent | ee448a523d377f9ed882dac806d2f5001bfa2432 (diff) | |
| download | gcc-16137fbb9256ef365dd498d39024eb33de1a4cd8.zip gcc-16137fbb9256ef365dd498d39024eb33de1a4cd8.tar.gz gcc-16137fbb9256ef365dd498d39024eb33de1a4cd8.tar.bz2 | |
Restore ancient -Waddress for weak symbols [PR33925].
Resolves:
PR c/33925 - gcc -Waddress lost some useful warnings
PR c/102867 - -Waddress from macro expansion in readelf.c
gcc/c-family/ChangeLog:
PR c++/33925
PR c/102867
* c-common.c (decl_with_nonnull_addr_p): Call maybe_nonzero_address
and improve handling tof defined symbols.
gcc/c/ChangeLog:
PR c++/33925
PR c/102867
* c-typeck.c (maybe_warn_for_null_address): Suppress warnings for
code resulting from macro expansion.
gcc/cp/ChangeLog:
PR c++/33925
PR c/102867
* typeck.c (warn_for_null_address): Suppress warnings for code
resulting from macro expansion.
gcc/ChangeLog:
PR c++/33925
PR c/102867
* doc/invoke.texi (-Waddress): Update.
gcc/testsuite/ChangeLog:
PR c++/33925
PR c/102867
* g++.dg/warn/Walways-true-2.C: Adjust to avoid a valid warning.
* c-c++-common/Waddress-5.c: New test.
* c-c++-common/Waddress-6.c: New test.
* g++.dg/warn/Waddress-7.C: New test.
* gcc.dg/Walways-true-2.c: Adjust to avoid a valid warning.
* gcc.dg/weak/weak-3.c: Expect a warning.
Diffstat (limited to 'gcc/c')
| -rw-r--r-- | gcc/c/c-typeck.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c index 782414f..50d7010 100644 --- a/gcc/c/c-typeck.c +++ b/gcc/c/c-typeck.c @@ -11588,7 +11588,10 @@ build_vec_cmp (tree_code code, tree type, static void maybe_warn_for_null_address (location_t loc, tree op, tree_code code) { - if (!warn_address || warning_suppressed_p (op, OPT_Waddress)) + /* Prevent warnings issued for macro expansion. */ + if (!warn_address + || warning_suppressed_p (op, OPT_Waddress) + || from_macro_expansion_at (loc)) return; if (TREE_CODE (op) == NOP_EXPR) |