llvm-project/clang/test/CodeGenCXX/cast-to-ref-bool.cpp

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// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
// CHECK-LABEL: main
int main(int argc, char **argv) {
// CHECK: load i8, i8* %
// CHECK-NEXT: trunc i8 %{{.+}} to i1
bool b = (bool &)argv[argc][1];
return b;
}