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With cost comparison and MMX-with-SSE vector width available we prefer to use V2SImode over V4SImode with shuffles, rightfully so I think. The following adds variants with explicit cost compare enabled and disabled and adjusts the cost comparison variant accordingly. * gcc.target/i386/vect-strided-1.c: Disable vector cost comparison. * gcc.target/i386/vect-strided-2.c: Likewise. * gcc.target/i386/vect-strided-3.c: Likewise. * gcc.target/i386/vect-strided-4.c: Likewise. * gcc.target/i386/vect-strided-1b.c: Copy of gcc.target/i386/vect-strided-1.c, enable vector cost comparison and adjust expected code generation. * gcc.target/i386/vect-strided-2b.c: Likewise. * gcc.target/i386/vect-strided-3b.c: Likewise. * gcc.target/i386/vect-strided-4b.c: Likewise.
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