warn-range-loop-analysis-trivially-copyable.cpp
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// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wloop-analysis -verify %s
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wrange-loop-analysis -verify %s
void test_POD_64_bytes() {
struct Record {
char a[64];
};
Record records[8];
for (const auto r : records)
(void)r;
}
void test_POD_65_bytes() {
struct Record {
char a[65];
};
// expected-warning@+3 {{loop variable 'r' of type 'const Record' creates a copy from type 'const Record'}}
// expected-note@+2 {{use reference type 'const Record &' to prevent copying}}
Record records[8];
for (const auto r : records)
(void)r;
}
void test_TriviallyCopyable_64_bytes() {
struct Record {
Record() {}
char a[64];
};
Record records[8];
for (const auto r : records)
(void)r;
}
void test_TriviallyCopyable_65_bytes() {
struct Record {
Record() {}
char a[65];
};
// expected-warning@+3 {{loop variable 'r' of type 'const Record' creates a copy from type 'const Record'}}
// expected-note@+2 {{use reference type 'const Record &' to prevent copying}}
Record records[8];
for (const auto r : records)
(void)r;
}
void test_NonTriviallyCopyable() {
struct Record {
Record() {}
~Record() {}
volatile int a;
int b;
};
// expected-warning@+3 {{loop variable 'r' of type 'const Record' creates a copy from type 'const Record'}}
// expected-note@+2 {{use reference type 'const Record &' to prevent copying}}
Record records[8];
for (const auto r : records)
(void)r;
}
void test_TrivialABI_64_bytes() {
struct [[clang::trivial_abi]] Record {
Record() {}
~Record() {}
char a[64];
};
Record records[8];
for (const auto r : records)
(void)r;
}
void test_TrivialABI_65_bytes() {
struct [[clang::trivial_abi]] Record {
Record() {}
~Record() {}
char a[65];
};
// expected-warning@+3 {{loop variable 'r' of type 'const Record' creates a copy from type 'const Record'}}
// expected-note@+2 {{use reference type 'const Record &' to prevent copying}}
Record records[8];
for (const auto r : records)
(void)r;
}