1 ; RUN: opt -irce-print-range-checks -irce-print-changed-loops -verify-loop-info -irce < %s 2>&1 | FileCheck %s 2 ; RUN: opt -irce-print-range-checks -irce-print-changed-loops -verify-loop-info -passes='require<branch-prob>,loop(irce)' < %s 2>&1 | FileCheck %s 3 4 ; CHECK: irce: loop has 1 inductive range checks: 5 ; CHECK-NEXT: InductiveRangeCheck: 6 ; CHECK-NEXT: Kind: RANGE_CHECK_LOWER 7 ; CHECK-NEXT: Begin: (-1 + %n) Step: -1 End: 2147483647 8 ; CHECK-NEXT: CheckUse: br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 Operand: 0 9 ; CHECK-NEXT: irce: in function only_lower_check: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> 10 11 define void @only_lower_check(i32 *%arr, i32 *%a_len_ptr, i32 %n) { 12 entry: 13 %len = load i32, i32* %a_len_ptr, !range !0 14 %first.itr.check = icmp sgt i32 %n, 0 15 %start = sub i32 %n, 1 16 br i1 %first.itr.check, label %loop, label %exit 17 18 loop: 19 %idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ] 20 %idx.dec = sub i32 %idx, 1 21 %abc = icmp sge i32 %idx, 0 22 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 23 24 in.bounds: 25 %addr = getelementptr i32, i32* %arr, i32 %idx 26 store i32 0, i32* %addr 27 %next = icmp sgt i32 %idx.dec, -1 28 br i1 %next, label %loop, label %exit 29 30 out.of.bounds: 31 ret void 32 33 exit: 34 ret void 35 } 36 37 !0 = !{i32 0, i32 2147483647} 38 !1 = !{!"branch_weights", i32 64, i32 4} 39
