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From: Richard Biener <rguenth@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r11-10302] middle-end/106027 - fix types in needle folding Date: Tue, 11 Oct 2022 13:04:18 +0000 (GMT) [thread overview] Message-ID: <20221011130418.6CF103851146@sourceware.org> (raw) https://gcc.gnu.org/g:a27e5fc76a49b759d271a828f225899434b537e9 commit r11-10302-ga27e5fc76a49b759d271a828f225899434b537e9 Author: Richard Biener <rguenther@suse.de> Date: Mon Jun 20 13:40:50 2022 +0200 middle-end/106027 - fix types in needle folding The fold_to_nonsharp_ineq_using_bound folding ends up creating invalid typed IL which confuses later foldings. The following fixes that. 2022-06-20 Richard Biener <rguenther@suse.de> PR middle-end/106027 * fold-const.c (fold_to_nonsharp_ineq_using_bound): Use the type of the prevailing comparison for the new comparison type. (fold_binary_loc): Use proper types for the A < X && A + 1 > Y to A < X && A >= Y folding. * gcc.dg/pr106027.c: New testcase. (cherry picked from commit 713f2fd923442b1be620a44240ddf786ae0ab476) Diff: --- gcc/fold-const.c | 10 +++++++--- gcc/testsuite/gcc.dg/pr106027.c | 8 ++++++++ 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 8ce775753f3..901255a18d6 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -7508,7 +7508,7 @@ tree_swap_operands_p (const_tree arg0, const_tree arg1) static tree fold_to_nonsharp_ineq_using_bound (location_t loc, tree ineq, tree bound) { - tree a, typea, type = TREE_TYPE (ineq), a1, diff, y; + tree a, typea, type = TREE_TYPE (bound), a1, diff, y; if (TREE_CODE (bound) == LT_EXPR) a = TREE_OPERAND (bound, 0); @@ -11997,11 +11997,15 @@ fold_binary_loc (location_t loc, enum tree_code code, tree type, { tem = fold_to_nonsharp_ineq_using_bound (loc, arg0, arg1); if (tem && !operand_equal_p (tem, arg0, 0)) - return fold_build2_loc (loc, code, type, tem, arg1); + return fold_convert (type, + fold_build2_loc (loc, code, TREE_TYPE (arg1), + tem, arg1)); tem = fold_to_nonsharp_ineq_using_bound (loc, arg1, arg0); if (tem && !operand_equal_p (tem, arg1, 0)) - return fold_build2_loc (loc, code, type, arg0, tem); + return fold_convert (type, + fold_build2_loc (loc, code, TREE_TYPE (arg0), + arg0, tem)); } if ((tem = fold_truth_andor (loc, code, type, arg0, arg1, op0, op1)) diff --git a/gcc/testsuite/gcc.dg/pr106027.c b/gcc/testsuite/gcc.dg/pr106027.c new file mode 100644 index 00000000000..735205fb252 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr106027.c @@ -0,0 +1,8 @@ +/* { dg-do compile } */ +/* { dg-options "-O" } */ + +int +foo (unsigned int x, int y) +{ + return x <= (((y != y) < 0) ? y < 1 : 0); +}
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