[flang-commits] [flang] [Flang][OpenMP] Add Semantics support for Nested OpenMPLoopConstructs (PR #145917)

[Jack Styles via flang-commits]

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+! Testing the Semantics of nested Loop Transformation Constructs
+
+!RUN: %python %S/../test_errors.py %s %flang -fopenmp -fopenmp-version=51
+
+subroutine loop_transformation_construct1
+  implicit none
+
+  !$omp do
+  !ERROR: A DO loop must follow the UNROLL directive
+  !$omp unroll
+end subroutine
+
+subroutine loop_transformation_construct2
+  implicit none
+  integer :: i = 5
+  integer :: y
+  integer :: v(i)
+
+  !$omp do
+  !$omp tile
+  do x = 1, i
+    v(x) = x(x) * 2
+  end do
+  !$omp end tile
+  !$omp end do
+  !ERROR: The END TILE directive must follow the DO loop associated with the loop construct
+  !$omp end tile
+end subroutine
+
+subroutine loop_transformation_construct2
+  implicit none
+  integer :: i = 5
+  integer :: y
+  integer :: v(i)
+
+  !$omp do
+  !ERROR: Only Loop Transformation Constructs or Loop Nests can be nested within Loop Constructs
+  !$omp parallel do
+  do x = 1, i
+    v(x) = x(x) * 2
+  end do
+end subroutine
+
+subroutine loop_transformation_construct3
+  implicit none
+  integer :: i = 5
+  integer :: y
+  integer :: v(i)
+
+  !$omp do
+  do x = 1, i
+    v(x) = x(x) * 2
+  end do
+  !ERROR: A DO loop must follow the TILE directive
+  !$omp tile
+end subroutine
+
+subroutine loop_transformation_construct4
+  implicit none
+  integer :: i = 5
+  integer :: y
+  integer :: v(i)
+
+  !$omp do
+  !$omp unroll full
+  !ERROR: If a loop construct has been fully unrolled, it cannot then be tiled
+  !$omp tile
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Stylie777 wrote:

Done

https://github.com/llvm/llvm-project/pull/145917