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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - `-Wbitwise-instead-of-logical` is emitted 4 times for a single `&` operator"
href="https://bugs.llvm.org/show_bug.cgi?id=52226">52226</a>
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<th>Summary</th>
<td>`-Wbitwise-instead-of-logical` is emitted 4 times for a single `&` operator
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nicolasweber@gmx.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>% cat test.mm
// objc/objc.h does this based on __OBJC_BOOL_IS_BOOL, which
// clang/lib/Basic/Targets/AArch64.cpp defines by setting
// `UseSignedCharForObjCBool = false;`.
typedef bool BOOL;
#define YES __objc_yes
@interface Foo
@property(nonatomic, assign) BOOL shouldEnableSave;
- (void)foo;
@end
@implementation Foo
@synthesize shouldEnableSave;
- (void)foo {
self.shouldEnableSave = [self checkIfValidSite] & [self
checkIfValidPassword];
}
- (BOOL)checkIfValidSite { return YES; }
- (BOOL)checkIfValidPassword { return YES; }
@end
% out/gn/bin/clang -c test.mm --target=arm64-darwin-macos -Wall
test.mm:15:27: warning: use of bitwise '&' with boolean operands
[-Wbitwise-instead-of-logical]
self.shouldEnableSave = [self checkIfValidSite] & [self
checkIfValidPassword];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&&
test.mm:15:27: note: cast one or both operands to int to silence this warning
test.mm:15:27: warning: use of bitwise '&' with boolean operands
[-Wbitwise-instead-of-logical]
self.shouldEnableSave = [self checkIfValidSite] & [self
checkIfValidPassword];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&&
test.mm:15:27: note: cast one or both operands to int to silence this warning
test.mm:15:27: warning: use of bitwise '&' with boolean operands
[-Wbitwise-instead-of-logical]
self.shouldEnableSave = [self checkIfValidSite] & [self
checkIfValidPassword];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&&
test.mm:15:27: note: cast one or both operands to int to silence this warning
test.mm:15:27: warning: use of bitwise '&' with boolean operands
[-Wbitwise-instead-of-logical]
self.shouldEnableSave = [self checkIfValidSite] & [self
checkIfValidPassword];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&&
test.mm:15:27: note: cast one or both operands to int to silence this warning
This is a great warning, but emitting it once should be sufficient :)</pre>
</div>
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