diff options
Diffstat (limited to 'test/Transforms/IRCE/only-lower-check.ll')
| -rw-r--r-- | test/Transforms/IRCE/only-lower-check.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/IRCE/only-lower-check.ll b/test/Transforms/IRCE/only-lower-check.ll new file mode 100644 index 0000000..69abc89 --- /dev/null +++ b/test/Transforms/IRCE/only-lower-check.ll @@ -0,0 +1,37 @@ +; RUN: opt -irce-print-range-checks -irce-print-changed-loops -irce < %s 2>&1 | FileCheck %s + +; CHECK: irce: loop has 1 inductive range checks: +; CHECK-NEXT: InductiveRangeCheck: +; CHECK-NEXT: Kind: RANGE_CHECK_LOWER +; CHECK-NEXT: Offset: (-1 + %n) Scale: -1 Length: (null) +; CHECK-NEXT: Branch: br i1 %abc, label %in.bounds, label %out.of.bounds +; 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(i32 *%arr, i32 *%a_len_ptr, i32 %n) { + entry: + %len = load i32, i32* %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, i32* %arr, i32 %idx + store i32 0, i32* %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} |