From: Stefan Schulze Frielinghaus Date: Tue, 5 May 2020 17:44:19 +0000 (+0200) Subject: tree-optimization: Fix use of uninitialized variables warnings [PR94952] X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2c832ffedf06ff614fc36c44ab6c892d84075e08;p=gcc.git tree-optimization: Fix use of uninitialized variables warnings [PR94952] While bootstrapping GCC on S/390 with --enable-checking=release several warnings about use of uninitialized variables bitpos, bitregion_start, and bitregion_end of function pass_store_merging::process_store are raised. According to PR94952 these seem to be false positives which are silenced by initialising the mentioned variables. Bootstrapped on S/390. Ok for master and releases/gcc-10 assuming that regtest succeeds (still running but I don't see a reason why it should fail)? gcc/ChangeLog: 2020-05-18 Stefan Schulze Frielinghaus PR tree-optimization/94952 * gimple-ssa-store-merging.c (pass_store_merging::process_store): Initialize variables bitpos, bitregion_start, and bitregion_end in order to silence warnings about use of uninitialized variables. --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 51b5b6c908d..0a1ff053ffa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2020-05-18 Stefan Schulze Frielinghaus + + PR tree-optimization/94952 + * gimple-ssa-store-merging.c (pass_store_merging::process_store): + Initialize variables bitpos, bitregion_start, and bitregion_end in + order to silence warnings about use of uninitialized variables. + 2020-05-18 Carl Love PR target/94833 diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c index 25753517cc6..c8e1877f540 100644 --- a/gcc/gimple-ssa-store-merging.c +++ b/gcc/gimple-ssa-store-merging.c @@ -4668,8 +4668,8 @@ pass_store_merging::process_store (gimple *stmt) { tree lhs = gimple_assign_lhs (stmt); tree rhs = gimple_assign_rhs1 (stmt); - poly_uint64 bitsize, bitpos; - poly_uint64 bitregion_start, bitregion_end; + poly_uint64 bitsize, bitpos = 0; + poly_uint64 bitregion_start = 0, bitregion_end = 0; tree base_addr = mem_valid_for_store_merging (lhs, &bitsize, &bitpos, &bitregion_start, &bitregion_end);