Testsuite: Fix and enhance cond-add-vec tests.
Adjustments to conditional add vector tests ensure that the correct transformations are applied, especially when using AVX-512.
The vector conditional add tests cond-add-vec-1.C and cond-add-vec-2.C were updated to correctly handle cases where VEC_COND_EXPR is transformed into a COND_ADD instruction, which occurs with -march=cascadelake or -mavx512f. The tests now check for both VEC_COND_EXPR and COND_ADD to ensure the expected behavior.
In Details
These C++ test cases exercise vectorization of conditional expressions using VEC_COND_EXPR. The issue is that, with certain architecture flags, the compiler transforms VEC_COND_EXPR into COND_ADD. The fix modifies the tests to account for this transformation, ensuring the tests remain valid.
For Context
This commit modifies compiler test cases that check the behavior of vector conditional expressions, which are used to perform operations on multiple data elements simultaneously. The changes account for specific instruction set extensions (like AVX-512 on Intel CPUs) that can alter how these expressions are compiled, ensuring the tests remain accurate and reliable.