Revert r231630 - Run LICM pass after loop unrolling pass.

As it broke llvm bootstrap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231635 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LoopUnroll/runtime-loop4.ll

@@ -1,43 +0,0 @@
-; RUN: opt < %s -S -O2 -unroll-runtime=true | FileCheck %s
-
-; Check runtime unrolling prologue can be promoted by LICM pass.
-
-; CHECK: entry:
-; CHECK: %xtraiter
-; CHECK: %lcmp.mod
-; CHECK: loop1:
-; CHECK: br i1 %lcmp.mod
-; CHECK: loop2.prol:
-
-define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind {
-entry:
-  br label %loop1
-
-loop1:
-  %iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ]
-  %offset1 = getelementptr i32, i32* %addr1, i32 %iv1
-  store i32 %iv1, i32* %offset1, align 4
-  br label %loop2.header
-
-loop2.header:
-  br label %loop2
-
-loop2:
-  %iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ]
-  %offset2 = getelementptr i32, i32* %addr2, i32 %iv2
-  store i32 %iv2, i32* %offset2, align 4
-  %inc2 = add i32 %iv2, 1
-  %exitcnd2 = icmp uge i32 %inc2, %iter
-  br i1 %exitcnd2, label %exit2, label %loop2
-
-exit2:
-  br label %loop1.latch
-
-loop1.latch:
-  %inc1 = add i32 %iv1, 1
-  %exitcnd1 = icmp uge i32 %inc1, 1024
-  br i1 %exitcnd1, label %exit, label %loop1
-
-exit:
-  ret void
-}