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tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Avoid undesirable warning.

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* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Avoid
	undesirable warning.

From-SVN: r267454
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Martin Sebor 2018-12-28 19:26:14 +00:00 committed by Jeff Law
parent 766d4a5925
commit 3a03bffd48
2 changed files with 12 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2018-12-28 Martin Sebor <msebor@redhat.com>
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Avoid
undesirable warning.
2018-12-28 Thomas Schwinge <thomas@codesourcery.com>
* omp-expand.c (expand_omp_target): Restructure OpenACC vs. OpenMP

7
gcc/tree-ssa-strlen.c
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@ -2114,6 +2114,13 @@ maybe_diag_stxncpy_trunc (gimple_stmt_iterator gsi, tree src, tree cnt)
if (wi::to_wide (dstsize) != cntrange[1])
return false;
/* Avoid warning for strncpy(a, b, N) calls where the following
equalities hold:
N == sizeof a && N == sizeof b */
if (tree srcsize = compute_objsize (src, 1))
if (wi::to_wide (srcsize) == cntrange[1])
return false;
if (cntrange[0] == cntrange[1])
return warning_at (callloc, OPT_Wstringop_truncation,
"%G%qD specified bound %E equals destination size",