Added end-to-end test.

Author: vzakhari

flang/test/Integration/cold_array_repacking.f90

@@ -0,0 +1,30 @@
+! Check that the branch weights used by the array repacking
+! are propagated all the way to LLVM IR:
+! RUN: %flang_fc1 -frepack-arrays -emit-llvm %s -o - | FileCheck %s
+
+! CHECK-LABEL: define void @test_(
+! CHECK-SAME:      ptr [[TMP0:%.*]]) {
+! CHECK:    [[TMP4:%.*]] = ptrtoint ptr [[TMP0]] to i64
+! CHECK:    [[TMP5:%.*]] = icmp ne i64 [[TMP4]], 0
+! CHECK:    br i1 [[TMP5]], label %[[BB6:.*]], label %[[BB46:.*]]
+! CHECK:  [[BB6]]:
+! CHECK:    [[TMP7:%.*]] = call i1 @_FortranAIsContiguous(ptr [[TMP0]])
+! CHECK:    [[TMP8:%.*]] = icmp eq i1 [[TMP7]], false
+! CHECK:    [[TMP13:%.*]] = and i1 [[TMP8]], [[TMP12:.*]]
+! CHECK:    br i1 [[TMP13]], label %[[BB14:.*]], label %[[BB46]], !prof [[PROF2:![0-9]+]]
+! CHECK:  [[BB14]]:
+! CHECK:    call void @_FortranAShallowCopyDirect
+! CHECK:    br label %[[BB46]]
+! CHECK:  [[BB46]]:
+! CHECK:    br i1 [[TMP5]], label %[[BB48:.*]], label %[[BB57:.*]]
+! CHECK:  [[BB48]]:
+! CHECK:    br i1 [[TMP55:.*]], label %[[BB56:.*]], label %[[BB57]], !prof [[PROF2]]
+! CHECK:  [[BB56]]:
+! CHECK:    call void @_FortranAShallowCopyDirect
+! CHECK:    br label %[[BB57]]
+! CHECK:  [[BB57]]:
+! CHECK:    ret void
+! CHECK: [[PROF2]] = !{!"branch_weights", i32 0, i32 1}
+subroutine test(x)
+  real :: x(:)
+end subroutine test