diff options
author | Artem Dergachev <artem.dergachev@gmail.com> | 2017-11-08 17:27:58 +0000 |
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committer | Artem Dergachev <artem.dergachev@gmail.com> | 2017-11-08 17:27:58 +0000 |
commit | a9a85a6f7686a079146debf56cec182ed6c884f7 (patch) | |
tree | d439fd76a1a1e840400cbfefd67f2f057a5e88c6 /test/Analysis | |
parent | dae5d856a417d34cf39731e2604d644e4108bdfc (diff) |
[analyzer] Fix a crash on logical operators with vectors.
Do not crash when trying to compute x && y or x || y where x and y are
of a vector type.
For now we do not seem to properly model operations with vectors. In particular,
operations && and || on a pair of vectors are not short-circuit, unlike regular
logical operators, so even our CFG is incorrect.
Avoid the crash, add respective FIXME tests for later.
Differential Revision: https://reviews.llvm.org/D39682
rdar://problem/34317663
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@317700 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Analysis')
-rw-r--r-- | test/Analysis/vector.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/Analysis/vector.c b/test/Analysis/vector.c new file mode 100644 index 0000000000..32b568f6b0 --- /dev/null +++ b/test/Analysis/vector.c @@ -0,0 +1,28 @@ +// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -verify %s + +typedef int __attribute__((ext_vector_type(2))) V; + +void clang_analyzer_numTimesReached(); +void clang_analyzer_eval(int); + +int flag; + +V pass_through_and_set_flag(V v) { + flag = 1; + return v; +} + +V dont_crash_and_dont_split_state(V x, V y) { + flag = 0; + V z = x && pass_through_and_set_flag(y); + clang_analyzer_eval(flag); // expected-warning{{TRUE}} + // FIXME: For now we treat vector operator && as short-circuit, + // but in fact it is not. It should always evaluate + // pass_through_and_set_flag(). It should not split state. + // Now we also get FALSE on the other path. + // expected-warning@-5{{FALSE}} + + // FIXME: Should be 1 since we should not split state. + clang_analyzer_numTimesReached(); // expected-warning{{2}} + return z; +} |