1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -triple x86_64-apple-darwin13 -Wno-shift-count-overflow -verify=expected,cxx17 -std=c++17 %s
2 // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -triple x86_64-apple-darwin13 -Wno-shift-count-overflow -verify=expected,cxx2a -std=c++2a %s
3 
4 int testNegativeShift(int a) {
5   if (a == -5) {
6     return 1 << a; // expected-warning{{The result of the left shift is undefined because the right operand is negative}}
7   }
8   return 0;
9 }
10 
11 int testNegativeLeftShift(int a) {
12   if (a == -3) {
13     return a << 1; // cxx17-warning{{The result of the left shift is undefined because the left operand is negative}}
14   }
15   return 0;
16 }
17 
18 int testUnrepresentableLeftShift(int a) {
19   if (a == 8)
20     return a << 30; // cxx17-warning{{The result of the left shift is undefined due to shifting '8' by '30', which is unrepresentable in the unsigned version of the return type 'int'}}
21   return 0;
22 }
23