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call.c (build_over_call): Set TREE_NO_UNUSED_WARNING too. 

* call.c (build_over_call): Set TREE_NO_UNUSED_WARNING too.
	* cvt.c (convert_to_void): Preserve TREE_NO_UNUSED_WARNING.

	* g++.dg/warn/Wunused-1.C: New test.

From-SVN: r50770
This commit is contained in:
Jakub Jelinek 2002-03-14 15:26:56 +01:00 committed by Jakub Jelinek
parent 6cbcc54138
commit d3f129b340
5 changed files with 26 additions and 0 deletions
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5
gcc/cp/ChangeLog
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@ -1,3 +1,8 @@
2002-03-14 Jakub Jelinek <jakub@redhat.com>
* call.c (build_over_call): Set TREE_NO_UNUSED_WARNING too.
* cvt.c (convert_to_void): Preserve TREE_NO_UNUSED_WARNING.
2002-03-12 Richard Sandiford <rsandifo@redhat.com>
* mangle.c (write_builtin_type): Handle 128-bit integers even if

1
gcc/cp/call.c
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@ -4305,6 +4305,7 @@ build_over_call (cand, args, flags)
Ideally, the notions of having side-effects and of being
useless would be orthogonal. */
TREE_SIDE_EFFECTS (val) = 1;
TREE_NO_UNUSED_WARNING (val) = 1;
}
else
val = build (MODIFY_EXPR, TREE_TYPE (to), to, arg);

1
gcc/cp/cvt.c
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@ -852,6 +852,7 @@ convert_to_void (expr, implicit)
tree t = build (COMPOUND_EXPR, TREE_TYPE (new_op1),
TREE_OPERAND (expr, 0), new_op1);
TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (expr);
TREE_NO_UNUSED_WARNING (t) = TREE_NO_UNUSED_WARNING (expr);
expr = t;
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2002-03-14 Jakub Jelinek <jakub@redhat.com>
* g++.dg/warn/Wunused-1.C: New test.
2002-02-13 Richard Sandiford <rsandifo@redhat.com>
* g++.dg/abi/mangle6.C: New test.

15
gcc/testsuite/g++.dg/warn/Wunused-1.C Normal file
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@ -0,0 +1,15 @@
// Test whether -Wunused handles empty classes the same as non-empty.
// { dg-do compile }
// { dg-options "-Wunused" }
struct A {};
struct B { char c; };
void foo ()
{
struct A a0, a1;
struct B b0, b1 = { 25 };
a0 = a1; // { dg-bogus "value computed is not used" }
b0 = b1;
}