| ; RUN: opt -irce-print-range-checks -irce-print-changed-loops -verify-loop-info -passes=irce < %s 2>&1 | FileCheck %s |
| ; RUN: opt -irce-print-range-checks -irce-print-changed-loops -verify-loop-info -passes='require<branch-prob>,irce' < %s 2>&1 | FileCheck %s |
| |
| ; CHECK: irce: loop has 1 inductive range checks: |
| ; CHECK-NEXT: InductiveRangeCheck: |
| ; CHECK-NEXT: Begin: (-1 + %n) Step: -1 End: 2147483647 |
| ; CHECK-NEXT: CheckUse: br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 Operand: 0 |
| ; CHECK-NEXT: irce: in function only_lower_check: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| |
| define void @only_lower_check(ptr %arr, ptr %a_len_ptr, i32 %n) { |
| entry: |
| %len = load i32, ptr %a_len_ptr, !range !0 |
| %first.itr.check = icmp sgt i32 %n, 0 |
| %start = sub i32 %n, 1 |
| br i1 %first.itr.check, label %loop, label %exit |
| |
| loop: |
| %idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ] |
| %idx.dec = sub i32 %idx, 1 |
| %abc = icmp sge i32 %idx, 0 |
| br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 |
| |
| in.bounds: |
| %addr = getelementptr i32, ptr %arr, i32 %idx |
| store i32 0, ptr %addr |
| %next = icmp sgt i32 %idx.dec, -1 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| !0 = !{i32 0, i32 2147483647} |
| !1 = !{!"branch_weights", i32 64, i32 4} |