diff options
Diffstat (limited to 'llvm/test/Transforms/GVN/br-identical.ll')
| -rw-r--r-- | llvm/test/Transforms/GVN/br-identical.ll | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/llvm/test/Transforms/GVN/br-identical.ll b/llvm/test/Transforms/GVN/br-identical.ll index 9997e01..5266889 100644 --- a/llvm/test/Transforms/GVN/br-identical.ll +++ b/llvm/test/Transforms/GVN/br-identical.ll @@ -1,8 +1,32 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6 ; RUN: opt -passes=gvn -S -o - %s | FileCheck %s ; If a branch has two identical successors, we cannot declare either dead. - define void @widget(i1 %p) { +; CHECK-LABEL: define void @widget( +; CHECK-SAME: i1 [[P:%.*]]) { +; CHECK-NEXT: [[ENTRY:.*]]: +; CHECK-NEXT: br label %[[BB2:.*]] +; CHECK: [[BB2]]: +; CHECK-NEXT: [[T1:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[T2:%.*]], %[[BB7:.*]] ] +; CHECK-NEXT: [[T2]] = add i64 [[T1]], 1 +; CHECK-NEXT: [[T3:%.*]] = icmp ult i64 0, [[T2]] +; CHECK-NEXT: br i1 [[T3]], label %[[BB3:.*]], label %[[BB4:.*]] +; CHECK: [[BB3]]: +; CHECK-NEXT: [[T4:%.*]] = call i64 @f() +; CHECK-NEXT: br label %[[BB4]] +; CHECK: [[BB4]]: +; CHECK-NEXT: [[FOO:%.*]] = phi i64 [ [[T4]], %[[BB3]] ], [ 0, %[[BB2]] ] +; CHECK-NEXT: br i1 [[P]], label %[[BB5:.*]], label %[[BB6:.*]] +; CHECK: [[BB5]]: +; CHECK-NEXT: br i1 true, label %[[BB7]], label %[[BB7]] +; CHECK: [[BB6]]: +; CHECK-NEXT: br i1 true, label %[[BB7]], label %[[BB7]] +; CHECK: [[BB7]]: +; CHECK-NEXT: br i1 [[P]], label %[[BB2]], label %[[BB8:.*]] +; CHECK: [[BB8]]: +; CHECK-NEXT: ret void +; entry: br label %bb2 @@ -17,7 +41,6 @@ bb3: br label %bb4 bb4: - ; CHECK-NOT: phi {{.*}} undef %foo = phi i64 [ %t4, %bb3 ], [ 0, %bb2 ] br i1 %p, label %bb5, label %bb6 |