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| author | Jakub Jelinek <jakub@redhat.com> | 2002-01-04 22:03:20 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2002-01-04 22:03:20 +0100 |
| commit | b0832fe1f38ce3553cb4d3b91b4821565c9d0d36 (patch) | |
| tree | 39b333f5be357db96e4a98270b060aeefbef3de7 /gcc/c-semantics.c | |
| parent | 81550d0e5fea4bf706390c9cd84b14d6f8d8fe3e (diff) | |
| download | gcc-b0832fe1f38ce3553cb4d3b91b4821565c9d0d36.tar.gz | |
tree.h (expand_expr_stmt_value): Add maybe_last argument.
* tree.h (expand_expr_stmt_value): Add maybe_last argument.
* c-common.h (genrtl_expr_stmt_value): Likewise.
* stmt.c (expand_expr_stmt): Pass 1 as maybe_last.
(expand_expr_stmt_value): Add maybe_last argument.
Don't warn about statement with no effect if it is the last statement
in expression statement.
* c-semantics.c (genrtl_expr_stmt): Pass 1 as maybe_last.
(genrtl_expr_stmt_value): Add maybe_last argument, pass it down to
expand_expr_stmt_value.
(expand_stmt) [EXPR_STMT]: Pass 1 as maybe_last to
genrtl_expr_stmt_value if t is the last EXPR_STMT in its scope.
* expr.c (expand_expr) [LABELED_BLOCK_EXPR, LOOP_EXPR]: Pass 1
as maybe_last to expand_expr_stmt_value.
* gcc.dg/20020104-1.c: New test.
From-SVN: r48541
Diffstat (limited to 'gcc/c-semantics.c')
| -rw-r--r-- | gcc/c-semantics.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/gcc/c-semantics.c b/gcc/c-semantics.c index ef9ba333751..4bab4d3aaa6 100644 --- a/gcc/c-semantics.c +++ b/gcc/c-semantics.c @@ -313,18 +313,20 @@ void genrtl_expr_stmt (expr) tree expr; { - genrtl_expr_stmt_value (expr, -1); + genrtl_expr_stmt_value (expr, -1, 1); } /* Generate the RTL for EXPR, which is an EXPR_STMT. WANT_VALUE tells whether to (1) save the value of the expression, (0) discard it or (-1) use expr_stmts_for_value to tell. The use of -1 is - deprecated, and retained only for backward compatibility. */ + deprecated, and retained only for backward compatibility. + MAYBE_LAST is non-zero if this EXPR_STMT might be the last statement + in expression statement. */ void -genrtl_expr_stmt_value (expr, want_value) +genrtl_expr_stmt_value (expr, want_value, maybe_last) tree expr; - int want_value; + int want_value, maybe_last; { if (expr != NULL_TREE) { @@ -334,7 +336,7 @@ genrtl_expr_stmt_value (expr, want_value) expand_start_target_temps (); if (expr != error_mark_node) - expand_expr_stmt_value (expr, want_value); + expand_expr_stmt_value (expr, want_value, maybe_last); if (stmts_are_full_exprs_p ()) expand_end_target_temps (); @@ -763,7 +765,10 @@ expand_stmt (t) break; case EXPR_STMT: - genrtl_expr_stmt_value (EXPR_STMT_EXPR (t), TREE_ADDRESSABLE (t)); + genrtl_expr_stmt_value (EXPR_STMT_EXPR (t), TREE_ADDRESSABLE (t), + TREE_CHAIN (t) == NULL + || (TREE_CODE (TREE_CHAIN (t)) == SCOPE_STMT + && TREE_CHAIN (TREE_CHAIN (t)) == NULL)); break; case DECL_STMT: |