[flang][cuda] Enforce PINNED attribute when ALLOCATE with PINNED option

[clementval]

When the PINNED option is specified on an ALLOCATE statement, the object must have the PINNED attribute.

[llvmbot]

@llvm/pr-subscribers-flang-semantics

Author: Valentin Clement (バレンタイン クレメン) (clementval)

Changes

When the PINNED option is specified on an ALLOCATE statement, the object must have the PINNED attribute.

---

Full diff: https://github.com/llvm/llvm-project/pull/89455.diff

2 Files Affected:

• (modified) flang/lib/Semantics/check-allocate.cpp (+7)
• (modified) flang/test/Semantics/cuf07.cuf (+8)

diff --git a/flang/lib/Semantics/check-allocate.cpp b/flang/lib/Semantics/check-allocate.cpp
index a7244e1c58330a..7bfd86262b3d62 100644
--- a/flang/lib/Semantics/check-allocate.cpp
+++ b/flang/lib/Semantics/check-allocate.cpp
@@ -611,6 +611,13 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
       return false;
     }
   }
+  if (allocateInfo_.gotPinned) {
+    std::optional<common::CUDADataAttr> cudaAttr{GetCUDADataAttr(ultimate_)};
+    if (!cudaAttr || *cudaAttr != common::CUDADataAttr::Pinned) {
+      context.Say(name_.source,
+          "Object in ALLOCATE must have PINNED attribute when PINNED option is specified"_err_en_US);
+    }
+  }
   return RunCoarrayRelatedChecks(context);
 }
 
diff --git a/flang/test/Semantics/cuf07.cuf b/flang/test/Semantics/cuf07.cuf
index b520b5da51264b..91a78e124c593b 100644
--- a/flang/test/Semantics/cuf07.cuf
+++ b/flang/test/Semantics/cuf07.cuf
@@ -23,4 +23,12 @@ module m
     !BECAUSE: 'ma' is a host-associated allocatable and is not definable in a device subprogram
     deallocate(ma)
   end subroutine
+
+  subroutine hostsub()
+    integer, allocatable, device :: ia(:)
+    logical :: plog
+
+    !ERROR: Object in ALLOCATE must have PINNED attribute when PINNED option is specified
+    allocate(ia(100), pinned = plog)
+  end subroutine
 end module