Testsuite: Correctly initialize struct in divide-by-zero test.
Fixes the gcc.dg/analyzer/divide-by-zero-6.c test by ensuring the struct is fully initialized on all architectures.
This commit fixes a test case (gcc.dg/analyzer/divide-by-zero-6.c) that was failing intermittently due to incorrect struct initialization. The test used memset with sizeof (f) where f was a pointer, which only cleared part of the structure on 32-bit architectures, leading to uninitialized values instead of the intended division by zero. The fix uses sizeof (*f) to clear the entire structure.
In Details
The test gcc.dg/analyzer/divide-by-zero-6.c was using __builtin_memset (f, 0, sizeof (f)) to clear a struct, but f was a pointer. This meant that only part of the struct was being cleared on 32-bit targets. The change replaces sizeof (f) with sizeof (*f) to ensure the whole structure is cleared on all architectures.
For Context
Compiler test suites are designed to verify that the compiler correctly identifies and reports errors. This commit fixes a test case that was intended to detect division by zero errors. The test was failing because a structure was not being properly initialized, leading to a different error (use of an uninitialized value) on some systems. The fix ensures that the structure is fully initialized, allowing the test to correctly verify the division by zero detection.