diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/init/string4.C')
-rw-r--r-- | gcc/testsuite/g++.dg/init/string4.C | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/init/string4.C b/gcc/testsuite/g++.dg/init/string4.C new file mode 100644 index 0000000..5df4176 --- /dev/null +++ b/gcc/testsuite/g++.dg/init/string4.C @@ -0,0 +1,60 @@ +// PR tree-optimization/71625 - missing strlen optimization on different +// array initialization style + +// Verify that zero-length array initialization results in the expected +// array sizes and in the expected diagnostics. See init-string-3.c +// for the corresponding C test. + +// { dg-do compile } +// { dg-options "-Wall -Wno-unused-local-typedefs -fpermissive" } + +#define A(expr) typedef char A[-1 + 2 * !!(expr)]; + +const char a[] = { }; + +A (sizeof a == 0); + + +const char b[0] = { }; + +A (sizeof b == 0); + +// Also verify that the error is "too many initializers for +// 'const char [0]'" and not "initializer-string is too long." +const char c[0] = { 1 }; // { dg-error "too many initializers for .const char \\\[0]" } + +A (sizeof c == 0); + + +void test_auto_empty (void) +{ + const char a[] = { }; + + A (sizeof a == 0); +} + +void test_auto_zero_length (void) +{ + const char a[0] = { }; + + A (sizeof a == 0); + + const char b[0] = { 0 }; // { dg-error "too many initializers" } + + A (sizeof b == 0); + + const char c[0] = ""; // { dg-warning "too long" } + + A (sizeof c == 0); +} + + +void test_compound_zero_length (void) +{ + A (sizeof (const char[]){ } == 0); + A (sizeof (const char[0]){ } == 0); + A (sizeof (const char[0]){ 0 } == 0); // { dg-error "too many" } + A (sizeof (const char[0]){ 1 } == 0); // { dg-error "too many" } + A (sizeof (const char[0]){ "" } == 0); // { dg-warning "too long" } + A (sizeof (const char[0]){ "1" } == 0); // { dg-warning "too long" } +} |