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This patch is a follow up to the existing discussions on https://gcc.gnu.org/ml/gcc-patches/2017-07/msg01904.html Bin had earlier submitted this patch to fix the ICE that occurs because of the missing LTGT in aarch64-simd.md. That discussion opened up a new bug report PR81647 for an inconsistent behavior. As discussed earlier on the gcc-patches discussion and on the bug report, PR81647 was occurring because of how UNEQ was handled in aarch64-simd.md rather than LTGT. Since __builtin_islessgreater is guaranteed to not give an FP exception but LTGT might, __builtin_islessgreater gets converted to ~UNEQ very early on in fold_builtin_unordered_cmp. Thus I will post a separate patch for correcting how UNEQ and other unordered comparisons are handled in aarch64-simd.md. This patch is only adding the missing LTGT to plug the ICE. Testing done: Checked for regressions on bootstrapped aarch64-none-linux-gnu and added a new compile time test case that gives out LTGT to make sure it doesn't ICE *** gcc/ChangeLog *** 2017-12-14 Sudakshina Das <sudi.das@arm.com> Bin Cheng <bin.cheng@arm.com> PR target/81228 * config/aarch64/aarch64.c (aarch64_select_cc_mode): Move LTGT to CCFPEmode. * config/aarch64/aarch64-simd.md (vec_cmp<mode><v_int_equiv>): Add LTGT. *** gcc/testsuite/ChangeLog *** 2017-12-14 Sudakshina Das <sudi.das@arm.com> PR target/81228 * gcc.dg/pr81228.c: New. Co-Authored-By: Bin Cheng <bin.cheng@arm.com> From-SVN: r255625
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