[flang][cuda] Allow STOP in device context

[clementval]

STOP statement is allowed in device procedure

[llvmbot]

@llvm/pr-subscribers-flang-semantics

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

Changes

STOP statement is allowed in device procedure

---

Full diff: https://github.com/llvm/llvm-project/pull/120625.diff

2 Files Affected:

• (modified) flang/lib/Semantics/check-cuda.cpp (+7)
• (modified) flang/test/Semantics/cuf09.cuf (+5)

diff --git a/flang/lib/Semantics/check-cuda.cpp b/flang/lib/Semantics/check-cuda.cpp
index bec3969c7a26b7..ba519a4f37d308 100644
--- a/flang/lib/Semantics/check-cuda.cpp
+++ b/flang/lib/Semantics/check-cuda.cpp
@@ -82,6 +82,10 @@ struct DeviceExprChecker
           }
         }
       }
+      // c_devloc is inlined in lowering.
+      if (x.GetName().compare("c_devloc") == 0) {
+        return {};
+      }
     } else if (x.GetSpecificIntrinsic()) {
       // TODO(CUDA): Check for unsupported intrinsics here
       return {};
@@ -350,6 +354,9 @@ template <bool IsCUFKernelDo> class DeviceContextChecker {
   void Check(const parser::ActionStmt &stmt, const parser::CharBlock &source) {
     common::visit(
         common::visitors{
+            [&](const common::Indirection<parser::StopStmt> &) {
+              return;
+            },
             [&](const common::Indirection<parser::PrintStmt> &) {},
             [&](const common::Indirection<parser::WriteStmt> &x) {
               if (x.value().format) { // Formatted write to '*' or '6'
diff --git a/flang/test/Semantics/cuf09.cuf b/flang/test/Semantics/cuf09.cuf
index b45ca6d7d1a9d7..3307e2a8626729 100644
--- a/flang/test/Semantics/cuf09.cuf
+++ b/flang/test/Semantics/cuf09.cuf
@@ -49,6 +49,11 @@ module m
     i = threadIdx%x
     a(i) = c(10) ! ok, a is device and c is constant
   end subroutine
+
+  attributes(global) subroutine stoptest()
+    print*,threadIdx%x
+    stop ! ok
+  end subroutine
 end
 
 program main

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.