; RUN: opt %s -instcombine define i32 @f(i32 %theNumber) { entry: %cmp = icmp sgt i32 %theNumber, -1 call void @llvm.assume(i1 %cmp) br i1 true, label %if.then, label %if.end if.then: ; preds = %entry %shl = shl nuw i32 %theNumber, 1 br label %if.end if.end: ; preds = %if.then, %entry %phi = phi i32 [ %shl, %if.then ], [ undef, %entry ] ret i32 %phi } declare void @llvm.assume(i1)