https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97939
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Eric Botcazou <ebotca...@gcc.gnu.org>: https://gcc.gnu.org/g:25218e34136fb7f89dd1cbb72b2d920546031bfb commit r10-9092-g25218e34136fb7f89dd1cbb72b2d920546031bfb Author: Eric Botcazou <ebotca...@adacore.com> Date: Sat Nov 28 12:54:48 2020 +0100 Fix PR target/97939 The little dance around 4096 that add/sub instructions do on the SPARC needs to be taken into account for the overflow arithmetic operations. It cannot be done for unsigned overflow, but it can be done for signed overflow. gcc/ChangeLog: PR target/97939 * config/sparc/predicates.md (arith_double_add_operand): Comment. * config/sparc/sparc.md (uaddvdi4): Use arith_double_operand. (addvdi4): Use arith_double_add_operand. (addsi3): Remove useless attributes. (addvsi4): Use arith_add_operand. (*cmp_ccv_plus): Likewise and add second alternative accordingly. (*cmp_ccxv_plus): Likewise. (*cmp_ccv_plus_set): Likewise. (*cmp_ccxv_plus_set): Likewise. (*cmp_ccv_plus_sltu_set): Likewise. (usubvdi4): Use arith_double_operand. (subvdi4): Use arith_double_add_operand. (subsi3): Remove useless attributes. (subvsi4): Use arith_add_operand. (*cmp_ccv_minus): Likewise and add second alternative accordingly. (*cmp_ccxv_minus): Likewise. (*cmp_ccv_minus_set): Likewise. (*cmp_ccxv_minus_set): Likewise. (*cmp_ccv_minus_sltu_set): Likewise. (negsi2): Use register_operand. (unegvsi3): Likewise. (negvsi3) Likewise. (*cmp_ccnz_neg): Likewise. (*cmp_ccxnz_neg): Likewise. (*cmp_ccnz_neg_set): Likewise. (*cmp_ccxnz_neg_set): Likewise. (*cmp_ccc_neg_set): Likewise. (*cmp_ccxc_neg_set): Likewise. (*cmp_ccc_neg_sltu_set): Likewise. (*cmp_ccv_neg): Likewise. (*cmp_ccxv_neg): Likewise. (*cmp_ccv_neg_set): Likewise. (*cmp_ccxv_neg_set): Likewise. (*cmp_ccv_neg_sltu_set): Likewise. gcc/testsuite/ChangeLog: * gcc.target/sparc/overflow-6.c: New test.
