diff options
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/assume.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/assume.ll b/llvm/test/Transforms/InstCombine/assume.ll index 13fa6339e85..7016dfc577f 100644 --- a/llvm/test/Transforms/InstCombine/assume.ll +++ b/llvm/test/Transforms/InstCombine/assume.ll @@ -275,6 +275,23 @@ define i1 @nonnull4(i32** %a) { ret i1 %rval } +; PR35846 - https://bugs.llvm.org/show_bug.cgi?id=35846 + +define i32 @assumption_conflicts_with_known_bits(i32 %a, i32 %b) { +; CHECK-LABEL: @assumption_conflicts_with_known_bits( +; CHECK-NEXT: tail call void @llvm.assume(i1 false) +; CHECK-NEXT: ret i32 0 +; + %and1 = and i32 %b, 3 + %B1 = lshr i32 %and1, %and1 + %B3 = shl nuw nsw i32 %and1, %B1 + %cmp = icmp eq i32 %B3, 1 + tail call void @llvm.assume(i1 %cmp) + %cmp2 = icmp eq i32 %B1, %B3 + tail call void @llvm.assume(i1 %cmp2) + ret i32 %and1 +} + attributes #0 = { nounwind uwtable } attributes #1 = { nounwind } |
