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re PR c++/19190 (warning "value computed is not used" emitted too often)

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PR c++/19190
	* cvt.c (convert_to_void): Do not use STRIP_NOPs.

	PR c++/19190
	* g++.dg/warn/Wunused-10.C: New test.

From-SVN: r92721
This commit is contained in:
Mark Mitchell 2004-12-30 00:31:00 +00:00 committed by Mark Mitchell
parent d98fd13429
commit d9fa123367
4 changed files with 23 additions and 2 deletions
gcc
cp
ChangeLogcvt.c
testsuite
ChangeLog
g++.dg/warn
Wunused-10.C

5
gcc/cp/ChangeLog

@ -1,3 +1,8 @@
2004-12-29 Mark Mitchell <mark@codesourcery.com>
PR c++/19190
* cvt.c (convert_to_void): Do not use STRIP_NOPs.
2004-12-28 Richard Henderson <rth@redhat.com>
PR inline-asm/15740

7
gcc/cp/cvt.c

@ -929,8 +929,11 @@ convert_to_void (tree expr, const char *implicit)
turned into a call to "__builtin_memcpy", with a
conversion of the return value to an appropriate
type.) So, to avoid false positives, we strip
conversions. */
STRIP_NOPS (e);
conversions. Do not use STRIP_NOPs because it will
not strip conversions to "void", as that is not a
mode-preserving conversion. */
while (TREE_CODE (e) == NOP_EXPR)
e = TREE_OPERAND (e, 0);
code = TREE_CODE (e);
class = TREE_CODE_CLASS (code);

5
gcc/testsuite/ChangeLog

@ -1,3 +1,8 @@
2004-12-29 Mark Mitchell <mark@codesourcery.com>
PR c++/19190
* g++.dg/warn/Wunused-10.C: New test.
2004-12-28 Richard Henderson <rth@redhat.com>
* objc.dg/stabs-1.m: Disable for alpha.

8
gcc/testsuite/g++.dg/warn/Wunused-10.C Normal file

@ -0,0 +1,8 @@
// PR c++/19190
// { dg-options "-Wunused" }
struct breakme
{
void setAction( unsigned char a ) { act = a; }
unsigned int act:8;
};