Skip contiguous check when ignore_tkr(c) is used

flang/lib/Semantics/check-call.cpp

@@ -1016,7 +1016,8 @@ static void CheckExplicitDataArg(const characteristics::DummyDataObject &dummy,
       }
     }
     if (dummyDataAttr == common::CUDADataAttr::Device &&
-        (dummyIsAssumedShape || dummyIsAssumedRank)) {
+        (dummyIsAssumedShape || dummyIsAssumedRank) &&
+        !dummy.ignoreTKR.test(common::IgnoreTKR::Contiguous)) {
       if (auto contig{evaluate::IsContiguous(actual, foldingContext,
               /*namedConstantSectionsAreContiguous=*/true,
               /*firstDimensionStride1=*/true)}) {

flang/test/Semantics/cuf20.cuf

@@ -0,0 +1,42 @@
+! RUN: %python %S/test_errors.py %s %flang_fc1
+
+! Test case 1: Device arrays with ignore_tkr(c)
+subroutine test_device_arrays()
+  interface bar
+    subroutine bar1(a)
+!dir$ ignore_tkr(c) a
+      real :: a(..)
+!@cuf attributes(device) :: a
+    end subroutine
+  end interface
+
+  integer :: n = 10, k = 2
+  real, device :: a(10), b(10), c(10)
+
+  call bar(a(1:n))     ! Should not warn about contiguity
+  call bar(b(1:n:k))   ! Should not warn about contiguity
+  call bar(c(1:n:2))   ! Should not warn about contiguity
+end subroutine
+
+! Test case 2: Managed arrays with ignore_tkr(c)
+subroutine test_managed_arrays()
+  interface bar
+    subroutine bar1(a)
+!dir$ ignore_tkr(c) a
+      real :: a(..)
+!@cuf attributes(device) :: a
+    end subroutine
+  end interface
+
+  integer :: n = 10, k = 2
+  real, managed :: a(10), b(10), c(10)
+
+  call bar(a(1:n))     ! Should not warn about contiguity
+  call bar(b(1:n:k))   ! Should not warn about contiguity
+  call bar(c(1:n:2))   ! Should not warn about contiguity
+end subroutine
+
+program main
+  call test_device_arrays()
+  call test_managed_arrays()
+end program