diff options
Diffstat (limited to 'llvm/test/Transforms/IRCE/not-likely-taken.ll')
| -rw-r--r-- | llvm/test/Transforms/IRCE/not-likely-taken.ll | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IRCE/not-likely-taken.ll b/llvm/test/Transforms/IRCE/not-likely-taken.ll new file mode 100644 index 00000000000..3b28ae14f9f --- /dev/null +++ b/llvm/test/Transforms/IRCE/not-likely-taken.ll @@ -0,0 +1,43 @@ +; RUN: opt -verify-loop-info -irce-print-changed-loops -irce < %s 2>&1 | FileCheck %s +; +; TODO: new-pm version should be enabled after we decide on branch-probability handling for loop passes +; TODO: opt -verify-loop-info -irce-print-changed-loops -passes='require<branch-prob>,loop(irce)' < %s 2>&1 | FileCheck %s + +; CHECK-NOT: constrained Loop + +define void @multiple_access_no_preloop( + i32* %arr_a, i32* %a_len_ptr, i32* %arr_b, i32* %b_len_ptr, i32 %n) { + + entry: + %len.a = load i32, i32* %a_len_ptr, !range !0 + %len.b = load i32, i32* %b_len_ptr, !range !0 + %first.itr.check = icmp sgt i32 %n, 0 + br i1 %first.itr.check, label %loop, label %exit + + loop: + %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds.b ] + %idx.next = add i32 %idx, 1 + %abc.a = icmp slt i32 %idx, %len.a + br i1 %abc.a, label %in.bounds.a, label %out.of.bounds, !prof !1 + + in.bounds.a: + %addr.a = getelementptr i32, i32* %arr_a, i32 %idx + store i32 0, i32* %addr.a + %abc.b = icmp slt i32 %idx, %len.b + br i1 %abc.b, label %in.bounds.b, label %out.of.bounds, !prof !1 + + in.bounds.b: + %addr.b = getelementptr i32, i32* %arr_b, i32 %idx + store i32 -1, i32* %addr.b + %next = icmp slt i32 %idx.next, %n + br i1 %next, label %loop, label %exit + + out.of.bounds: + ret void + + exit: + ret void +} + +!0 = !{i32 0, i32 2147483647} +!1 = !{!"branch_weights", i32 1, i32 1} |
