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From: Aldy Hernandez <aldyh@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-5695] range-ops: Handle undefined ranges in frange op[12]_range [PR108647] Date: Fri, 3 Feb 2023 20:31:04 +0000 (GMT) [thread overview] Message-ID: <20230203203104.DE1853858C5F@sourceware.org> (raw) https://gcc.gnu.org/g:10bd26d6efe88a8cf03a6a325351bc470a910cab commit r13-5695-g10bd26d6efe88a8cf03a6a325351bc470a910cab Author: Aldy Hernandez <aldyh@redhat.com> Date: Fri Feb 3 17:28:52 2023 +0100 range-ops: Handle undefined ranges in frange op[12]_range [PR108647] This patch gracefully handles undefined operand ranges for the floating point op[12]_range operators. This is very low risk, as we would have ICEd otherwise. We don't have a testcase that ICEs for floating point ranges, but it's only a matter of time. Besides, this dovetails nicely with the integer versions Jakub is testing. gcc/ChangeLog: PR tree-optimization/108647 * range-op-float.cc (foperator_lt::op1_range): Handle undefined ranges. (foperator_lt::op2_range): Same. (foperator_le::op1_range): Same. (foperator_le::op2_range): Same. (foperator_gt::op1_range): Same. (foperator_gt::op2_range): Same. (foperator_ge::op1_range): Same. (foperator_ge::op2_range): Same. (foperator_unordered_lt::op1_range): Same. (foperator_unordered_lt::op2_range): Same. (foperator_unordered_le::op1_range): Same. (foperator_unordered_le::op2_range): Same. (foperator_unordered_gt::op1_range): Same. (foperator_unordered_gt::op2_range): Same. (foperator_unordered_ge::op1_range): Same. (foperator_unordered_ge::op2_range): Same. Diff: --- gcc/range-op-float.cc | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc index 2db83aeb2fc..ff42b95de4f 100644 --- a/gcc/range-op-float.cc +++ b/gcc/range-op-float.cc @@ -866,6 +866,8 @@ foperator_lt::op1_range (frange &r, // The TRUE side of x < NAN is unreachable. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_lt (r, type, op2)) { r.clear_nan (); @@ -901,6 +903,8 @@ foperator_lt::op2_range (frange &r, // The TRUE side of NAN < x is unreachable. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_gt (r, type, op1)) { r.clear_nan (); @@ -982,6 +986,8 @@ foperator_le::op1_range (frange &r, // The TRUE side of x <= NAN is unreachable. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_le (r, type, op2)) r.clear_nan (); break; @@ -1013,6 +1019,8 @@ foperator_le::op2_range (frange &r, // The TRUE side of NAN <= x is unreachable. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_ge (r, type, op1)) r.clear_nan (); break; @@ -1021,6 +1029,8 @@ foperator_le::op2_range (frange &r, // On the FALSE side of NAN <= x, we know nothing about x. if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_lt (r, type, op1); break; @@ -1090,6 +1100,8 @@ foperator_gt::op1_range (frange &r, // The TRUE side of x > NAN is unreachable. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_gt (r, type, op2)) { r.clear_nan (); @@ -1102,6 +1114,8 @@ foperator_gt::op1_range (frange &r, // On the FALSE side of x > NAN, we know nothing about x. if (op2.known_isnan ()) r.set_varying (type); + else if (op2.undefined_p ()) + return false; else build_le (r, type, op2); break; @@ -1125,6 +1139,8 @@ foperator_gt::op2_range (frange &r, // The TRUE side of NAN > x is unreachable. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_lt (r, type, op1)) { r.clear_nan (); @@ -1137,6 +1153,8 @@ foperator_gt::op2_range (frange &r, // On The FALSE side of NAN > x, we know nothing about x. if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_ge (r, type, op1); break; @@ -1206,6 +1224,8 @@ foperator_ge::op1_range (frange &r, // The TRUE side of x >= NAN is unreachable. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_ge (r, type, op2)) r.clear_nan (); break; @@ -1214,6 +1234,8 @@ foperator_ge::op1_range (frange &r, // On the FALSE side of x >= NAN, we know nothing about x. if (op2.known_isnan ()) r.set_varying (type); + else if (op2.undefined_p ()) + return false; else build_lt (r, type, op2); break; @@ -1236,6 +1258,8 @@ foperator_ge::op2_range (frange &r, tree type, // The TRUE side of NAN >= x is unreachable. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_le (r, type, op1)) r.clear_nan (); break; @@ -1244,6 +1268,8 @@ foperator_ge::op2_range (frange &r, tree type, // On the FALSE side of NAN >= x, we know nothing about x. if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_gt (r, type, op1); break; @@ -1592,6 +1618,8 @@ foperator_unordered_lt::op1_range (frange &r, tree type, case BRS_TRUE: if (op2.known_isnan ()) r.set_varying (type); + else if (op2.undefined_p ()) + return false; else build_lt (r, type, op2); break; @@ -1601,6 +1629,8 @@ foperator_unordered_lt::op1_range (frange &r, tree type, // impossible for op2 to be a NAN. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_ge (r, type, op2)) r.clear_nan (); break; @@ -1622,6 +1652,8 @@ foperator_unordered_lt::op2_range (frange &r, tree type, case BRS_TRUE: if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_gt (r, type, op1); break; @@ -1631,6 +1663,8 @@ foperator_unordered_lt::op2_range (frange &r, tree type, // impossible for op1 to be a NAN. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_le (r, type, op1)) r.clear_nan (); break; @@ -1686,6 +1720,8 @@ foperator_unordered_le::op1_range (frange &r, tree type, case BRS_TRUE: if (op2.known_isnan ()) r.set_varying (type); + else if (op2.undefined_p ()) + return false; else build_le (r, type, op2); break; @@ -1717,6 +1753,8 @@ foperator_unordered_le::op2_range (frange &r, case BRS_TRUE: if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_ge (r, type, op1); break; @@ -1726,6 +1764,8 @@ foperator_unordered_le::op2_range (frange &r, // impossible for op1 to be a NAN. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_lt (r, type, op1)) r.clear_nan (); break; @@ -1783,6 +1823,8 @@ foperator_unordered_gt::op1_range (frange &r, case BRS_TRUE: if (op2.known_isnan ()) r.set_varying (type); + else if (op2.undefined_p ()) + return false; else build_gt (r, type, op2); break; @@ -1792,6 +1834,8 @@ foperator_unordered_gt::op1_range (frange &r, // impossible for op2 to be a NAN. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_le (r, type, op2)) r.clear_nan (); break; @@ -1814,6 +1858,8 @@ foperator_unordered_gt::op2_range (frange &r, case BRS_TRUE: if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_lt (r, type, op1); break; @@ -1823,6 +1869,8 @@ foperator_unordered_gt::op2_range (frange &r, // impossible for op1 to be a NAN. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_ge (r, type, op1)) r.clear_nan (); break; @@ -1880,6 +1928,8 @@ foperator_unordered_ge::op1_range (frange &r, case BRS_TRUE: if (op2.known_isnan ()) r.set_varying (type); + else if (op2.undefined_p ()) + return false; else build_ge (r, type, op2); break; @@ -1889,6 +1939,8 @@ foperator_unordered_ge::op1_range (frange &r, // impossible for op2 to be a NAN. if (op2.known_isnan ()) r.set_undefined (); + else if (op2.undefined_p ()) + return false; else if (build_lt (r, type, op2)) r.clear_nan (); break; @@ -1910,6 +1962,8 @@ foperator_unordered_ge::op2_range (frange &r, tree type, case BRS_TRUE: if (op1.known_isnan ()) r.set_varying (type); + else if (op1.undefined_p ()) + return false; else build_le (r, type, op1); break; @@ -1919,6 +1973,8 @@ foperator_unordered_ge::op2_range (frange &r, tree type, // impossible for op1 to be a NAN. if (op1.known_isnan ()) r.set_undefined (); + else if (op1.undefined_p ()) + return false; else if (build_gt (r, type, op1)) r.clear_nan (); break;
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