diff options
Diffstat (limited to 'llvm/test/Transforms/LoopUnroll/zeroed-branch-weights.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnroll/zeroed-branch-weights.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/zeroed-branch-weights.ll b/llvm/test/Transforms/LoopUnroll/zeroed-branch-weights.ll new file mode 100644 index 0000000..4d378b0 --- /dev/null +++ b/llvm/test/Transforms/LoopUnroll/zeroed-branch-weights.ll @@ -0,0 +1,30 @@ +; Check that zeroed branch weights do not crash or otherwise break basic +; LoopUnroll behavior when it tries to compute a probability from them. + +; RUN: opt < %s -S -unroll-count=2 -passes='loop-unroll' 2>&1 | FileCheck %s + +define void @test() { +entry: + br label %loop + +loop: + br i1 false, label %end, label %loop, !prof !0 + +end: + ret void +} + +!0 = !{!"branch_weights", i32 0, i32 0} + +; CHECK: define void @test() { +; CHECK: entry: +; CHECK: br label %loop +; CHECK: loop: +; CHECK: br i1 false, label %end, label %loop.1, !prof !0 +; CHECK: loop.1: +; CHECK: br i1 false, label %end, label %loop, !prof !0, !llvm.loop !1 +; CHECK-NOT: loop.2 +; CHECK: end: +; CHECK: ret void +; CHECK: } +; CHECK: !0 = !{!"branch_weights", i32 0, i32 0} |