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015c39882e
Currently, we infer 0 if the divisible of the modulo op is 0: int a = x < 0; // a can be 0 int b = a % y; // b is either 1 % sym or 0 However, we don't when the op is / : int a = x < 0; // a can be 0 int b = a / y; // b is either 1 / sym or 0 / sym This commit fixes the discrepancy. Differential Revision: https://reviews.llvm.org/D99343
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
// RUN: %clang_analyze_cc1 -analyzer-checker=core \
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// RUN: -analyzer-checker=debug.ExprInspection \
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// RUN: -verify %s
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void clang_analyzer_dump(int);
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void test_0_multiplier1(int x, int y) {
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int a = x < 0; // Eagerly bifurcate.
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clang_analyzer_dump(a);
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// expected-warning@-1{{0 S32b}}
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// expected-warning@-2{{1 S32b}}
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int b = a * y;
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clang_analyzer_dump(b);
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// expected-warning@-1{{0 S32b}}
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// expected-warning-re@-2{{reg_${{[[:digit:]]+}}<int y>}}
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}
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void test_0_multiplier2(int x, int y) {
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int a = x < 0; // Eagerly bifurcate.
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clang_analyzer_dump(a);
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// expected-warning@-1{{0 S32b}}
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// expected-warning@-2{{1 S32b}}
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int b = y * a;
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clang_analyzer_dump(b);
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// expected-warning@-1{{0 S32b}}
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// expected-warning-re@-2{{reg_${{[[:digit:]]+}}<int y>}}
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}
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void test_0_modulo(int x, int y) {
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int a = x < 0; // Eagerly bifurcate.
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clang_analyzer_dump(a);
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// expected-warning@-1{{0 S32b}}
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// expected-warning@-2{{1 S32b}}
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int b = a % y;
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clang_analyzer_dump(b);
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// expected-warning@-1{{0 S32b}}
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// expected-warning-re@-2{{1 % (reg_${{[[:digit:]]+}}<int y>)}}
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}
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void test_0_divisible(int x, int y) {
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int a = x < 0; // Eagerly bifurcate.
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clang_analyzer_dump(a);
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// expected-warning@-1{{0 S32b}}
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// expected-warning@-2{{1 S32b}}
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int b = a / y;
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clang_analyzer_dump(b);
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// expected-warning@-1{{0 S32b}}
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// expected-warning-re@-2{{1 / (reg_${{[[:digit:]]+}}<int y>)}}
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}
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