Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/opt/alias1.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// Test that type punning using an anonymous union works with strict aliasing. // { dg-do run } // { dg-options "-O2 -fstrict-aliasing" } extern "C" void abort (); void f (long i) { union { long ui; float uf[20]; }; ui = i; if (uf[0] != 42.0) abort (); } int main () { union U { long i; float f[20]; } u; u.f[0] = 42.0; f (u.i); }