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On some targets (ia32 for an example), sizeof long double is not a power of 2, this means you can't create a vector of it. So let's disable this testcase for non power of 2 sizeof long double. This needs to be done via a preprocessor macro as vector_size would cause an error otherwise. Committed as obvious after a test on x86_64 with -m32. gcc/testsuite/ChangeLog: * c-c++-common/torture/pr124086-1.c: Only enable for power of 2 long double.
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