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unreachable code" was issued incorrectly.
Summary:
-Wimplicit-fallthrough: fixed two cases where "fallthrough annotation in unreachable code" was issued incorrectly:
1. In actual unreachable code, but not immediately on a fall-through execution
path "fallthrough annotation does not directly precede switch label" is better;
2. After default: in a switch with covered enum cases. Actually, these shouldn't
be treated as unreachable code for our purpose.
Reviewers: rsmith
Reviewed By: rsmith
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D374
llvm-svn: 174575
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llvm-svn: 174182
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Summary:
A motivating example:
class ClassWithDtor {
public:
~ClassWithDtor() {}
};
void fallthrough3(int n) {
switch (n) {
case 2:
do {
ClassWithDtor temp;
return;
} while (0); // This generates a chain of unreachable CFG blocks.
case 3:
break;
}
}
Reviewers: rsmith, doug.gregor, alexfh
Reviewed By: alexfh
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D330
llvm-svn: 173889
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normal label.
Summary:
It's unlikely that a fallthrough is unintended in the following code:
switch (n) {
...
label:
case 1:
...
goto label;
...
}
Reviewers: rsmith, doug.gregor
Reviewed By: doug.gregor
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D329
llvm-svn: 173486
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multiple case labels.
llvm-svn: 173458
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of CFG, discussion: http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20120507/057370.html)
llvm-svn: 158854
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switch label immediately followed by a 'break;'.
llvm-svn: 157508
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cases in switch statements. Also add a [[clang::fallthrough]] attribute, which
can be used to suppress the warning in the case of intentional fallthrough.
Patch by Alexander Kornienko!
The handling of C++11 attribute namespaces in this patch is temporary, and will
be replaced with a cleaner mechanism in a subsequent patch.
llvm-svn: 156086
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