f3e09bdaee
This builtin is evaluated in compile time. But in the analyzer we don't yet automagically evaluate all calls that can be evaluated in compile time. Patch by Felix Kostenzer! Differential Revision: https://reviews.llvm.org/D42745 llvm-svn: 324789
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core,debug.ExprInspection %s -std=c++11 -verify
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void clang_analyzer_eval(bool);
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void clang_analyzer_warnIfReached();
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void testAddressof(int x) {
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clang_analyzer_eval(&x == __builtin_addressof(x)); // expected-warning{{TRUE}}
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}
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void testSize() {
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struct {
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int x;
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int y;
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char z;
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} object;
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clang_analyzer_eval(__builtin_object_size(&object.y, 0) == sizeof(object) - sizeof(int)); // expected-warning{{TRUE}}
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// Clang can't actually evaluate these builtin "calls", but importantly they don't actually evaluate the argument expression either.
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int i = 0;
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char buf[10];
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clang_analyzer_eval(__builtin_object_size(&buf[i++], 0) == sizeof(buf)); // expected-warning{{FALSE}}
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clang_analyzer_eval(__builtin_object_size(&buf[++i], 0) == sizeof(buf) - 1); // expected-warning{{FALSE}}
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clang_analyzer_eval(i == 0); // expected-warning{{TRUE}}
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}
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void test_assume_aligned_1(char *p) {
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char *q;
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q = (char*) __builtin_assume_aligned(p, 16);
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clang_analyzer_eval(p == q); // expected-warning{{TRUE}}
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}
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void test_assume_aligned_2(char *p) {
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char *q;
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q = (char*) __builtin_assume_aligned(p, 16, 8);
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clang_analyzer_eval(p == q); // expected-warning{{TRUE}}
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}
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void test_assume_aligned_3(char *p) {
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void *q;
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q = __builtin_assume_aligned(p, 16, 8);
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clang_analyzer_eval(p == q); // expected-warning{{TRUE}}
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}
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void test_assume_aligned_4(char *p) {
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char *q;
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q = (char*) __builtin_assume_aligned(p + 1, 16);
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clang_analyzer_eval(p == q); // expected-warning{{FALSE}}
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}
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void f(int i) {
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__builtin_assume(i < 10);
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clang_analyzer_eval(i < 15); // expected-warning {{TRUE}}
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}
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void g(int i) {
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if (i > 5) {
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__builtin_assume(i < 5);
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clang_analyzer_warnIfReached(); // Assumtion contradicts constraints.
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// We give up the analysis on this path.
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}
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}
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void test_constant_p() {
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int i = 1;
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const int j = 2;
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constexpr int k = 3;
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clang_analyzer_eval(__builtin_constant_p(42) == 1); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(i) == 0); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(j) == 1); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(k) == 1); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(i + 42) == 0); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(j + 42) == 1); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(k + 42) == 1); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(" ") == 1); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(test_constant_p) == 0); // expected-warning {{TRUE}}
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clang_analyzer_eval(__builtin_constant_p(k - 3) == 0); // expected-warning {{FALSE}}
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clang_analyzer_eval(__builtin_constant_p(k - 3) == 1); // expected-warning {{TRUE}}
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}
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