[PATCH] D111521: [DebugInfo] Mark OpenMP generated functions as artificial

[Alok Kumar Sharma via Phabricator via cfe-commits]

alok created this revision.
alok added reviewers: aprantl, djtodoro, jmorse, dblaikie, jini.susan, jini.susan.george.
alok added a project: debug-info.
Herald added subscribers: guansong, yaxunl.
alok requested review of this revision.
Herald added a reviewer: jdoerfert.
Herald added subscribers: cfe-commits, sstefan1.
Herald added a project: clang.

The OpenMP generates many functions which are not in user program.

Example: "__captured_stmt_debug_", "__captured_stmt", ".omp_outlined._debug__",
 ".omp_task_entry.", ".omp_outlined.", ".omp_outlined..1"

Current patch marks these all as artificial.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D111521

Files:
  clang/lib/CodeGen/CGDebugInfo.cpp
  clang/test/OpenMP/outlined_artificial.c


Index: clang/test/OpenMP/outlined_artificial.c
===================================================================
--- /dev/null
+++ clang/test/OpenMP/outlined_artificial.c
@@ -0,0 +1,63 @@
+// This testcase checks emission of DIFlagArtificial flag for outlined
+// subroutines generated by compiler.
+
+// REQUIRES: x86_64-linux
+
+// RUN: %clang_cc1 -debug-info-kind=constructor -x c -verify -triple x86_64-pc-linux-gnu -fopenmp -emit-llvm %s -o - | FileCheck %s
+// expected-no-diagnostics
+
+#if defined(_WIN32)
+#define __KAI_KMPC_CONVENTION __cdecl
+#else
+#define __KAI_KMPC_CONVENTION
+#endif
+
+extern int printf(const char *, ...);
+extern void __KAI_KMPC_CONVENTION omp_set_num_threads(int);
+extern int __KAI_KMPC_CONVENTION omp_get_thread_num(void);
+
+#define N 10
+
+float f[10];
+void foo_simd(int low, int up) {
+  for (int i = low; i < up; ++i) {
+    f[i] = 0.0;
+#pragma omp ordered simd
+    f[i] = 1.0;
+  }
+}
+
+int main() {
+  int arr[10];
+  int i;
+  omp_set_num_threads(2);
+#pragma omp parallel
+#pragma omp single
+#pragma omp taskloop num_tasks(10)
+  for (i = 0; i < N; i++) {
+    arr[i] = i * i;
+  }
+
+  for (int j = 0; j < N; j++) {
+    printf("%d\n", arr[j]);
+  }
+  return 0;
+}
+
+// CHECK: !DISubprogram(name: "__captured_stmt_debug__"
+// CHECK-SAME: DIFlagArtificial
+
+// CHECK: !DISubprogram(name: "__captured_stmt"
+// CHECK-SAME: DIFlagArtificial
+
+// CHECK: !DISubprogram(name: ".omp_outlined._debug__"
+// CHECK-SAME: DIFlagArtificial
+
+// CHECK: !DISubprogram(linkageName: ".omp_task_entry."
+// CHECK-SAME: DIFlagArtificial
+
+// CHECK: !DISubprogram(name: ".omp_outlined."
+// CHECK-SAME: DIFlagArtificial
+
+// CHECK: !DISubprogram(name: ".omp_outlined..1"
+// CHECK-SAME: DIFlagArtificial
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -4020,7 +4020,8 @@
     Name = Name.substr(1);
 
   if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>() ||
-      (isa<VarDecl>(D) && GD.getDynamicInitKind() != DynamicInitKind::NoStub)) {
+      (isa<VarDecl>(D) && GD.getDynamicInitKind() != DynamicInitKind::NoStub) ||
+      isa<CapturedDecl>(D)) {
     Flags |= llvm::DINode::FlagArtificial;
     // Artificial functions should not silently reuse CurLoc.
     CurLoc = SourceLocation();


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