[flang][cuda] Downgrade allocate pinned error to a warning

[clementval]

To be in accordance with the reference compiler.

[llvmbot]

@llvm/pr-subscribers-flang-semantics

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

Changes

To be in accordance with the reference compiler.

---

Full diff: https://github.com/llvm/llvm-project/pull/121589.diff

2 Files Affected:

• (modified) flang/lib/Semantics/check-allocate.cpp (+4-2)
• (modified) flang/test/Semantics/cuf07.cuf (+1-1)

diff --git a/flang/lib/Semantics/check-allocate.cpp b/flang/lib/Semantics/check-allocate.cpp
index 1e5412324916d6..223bee6eb6f118 100644
--- a/flang/lib/Semantics/check-allocate.cpp
+++ b/flang/lib/Semantics/check-allocate.cpp
@@ -616,9 +616,11 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
   }
   if (allocateInfo_.gotPinned) {
     std::optional<common::CUDADataAttr> cudaAttr{GetCUDADataAttr(ultimate_)};
-    if (!cudaAttr || *cudaAttr != common::CUDADataAttr::Pinned) {
+    if ((!cudaAttr || *cudaAttr != common::CUDADataAttr::Pinned) &&
+        context.languageFeatures().ShouldWarn(
+            common::UsageWarning::CUDAUsage)) {
       context.Say(name_.source,
-          "Object in ALLOCATE must have PINNED attribute when PINNED option is specified"_err_en_US);
+          "Object in ALLOCATE should have PINNED attribute when PINNED option is specified"_warn_en_US);
     }
   }
   if (allocateInfo_.gotStream) {
diff --git a/flang/test/Semantics/cuf07.cuf b/flang/test/Semantics/cuf07.cuf
index c48abb5adf0d41..56b2164532ae25 100644
--- a/flang/test/Semantics/cuf07.cuf
+++ b/flang/test/Semantics/cuf07.cuf
@@ -28,7 +28,7 @@ module m
     integer, allocatable, device :: ia(:)
     logical :: plog
 
-    !ERROR: Object in ALLOCATE must have PINNED attribute when PINNED option is specified
+    !WARNING: Object in ALLOCATE should have PINNED attribute when PINNED option is specified
     allocate(ia(100), pinned = plog)
   end subroutine
 

[klausler]

LGTM; thanks.