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3e7549ece7This patch implements constant folding for svlsl. Test cases have been added to check for the following cases: Zero, merge, and don't care predication. Shift by 0. Shift by register width. Overflow shift on signed and unsigned integers. Shift on a negative integer. Maximum possible shift, eg. shift by 7 on an 8-bit integer. The patch was bootstrapped and regtested on aarch64-linux-gnu, no regression. OK for mainline? Signed-off-by: Soumya AR <soumyaa@nvidia.com> gcc/ChangeLog: * config/aarch64/aarch64-sve-builtins-base.cc (svlsl_impl::fold): Try constant folding. * config/aarch64/aarch64-sve-builtins.cc (aarch64_const_binop): Return 0 if shift is out of range. gcc/testsuite/ChangeLog: * gcc.target/aarch64/sve/const_fold_lsl_1.c: New test. |
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