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