1 files changed, 117 insertions, 0 deletions
diff --git a/clang/test/Frontend/dump-minimization-hints-cpp20-modules.cpp b/clang/test/Frontend/dump-minimization-hints-cpp20-modules.cpp
new file mode 100644
index 0000000..a28acba
--- /dev/null
+++ b/clang/test/Frontend/dump-minimization-hints-cpp20-modules.cpp
@@ -0,0 +1,117 @@
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: split-file %s %t
+// RUN: %clang_cc1 -std=c++20 %t/foo.cppm -emit-module-interface -o %t/foo.pcm
+// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/use.cpp -dump-minimization-hints=%t/decls
+// RUN: cat %t/decls
+// RUN: cat %t/decls | FileCheck -check-prefix=RANGE %s
+// RANGE:{
+// RANGE-NEXT:"required_ranges": [
+// RANGE-NEXT:  {
+// RANGE-NEXT:    "file": "{{.+}}foo.cppm",
+// RANGE-NEXT:    "range": [
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 3,
+// RANGE-NEXT:          "column": 1
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 3,
+// RANGE-NEXT:          "column": 22
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 4,
+// RANGE-NEXT:          "column": 3
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 4,
+// RANGE-NEXT:          "column": 9
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 4,
+// RANGE-NEXT:          "column": 10
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 4,
+// RANGE-NEXT:          "column": 43
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 6,
+// RANGE-NEXT:          "column": 1
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 6,
+// RANGE-NEXT:          "column": 2
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 8,
+// RANGE-NEXT:          "column": 1
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 8,
+// RANGE-NEXT:          "column": 7
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 8,
+// RANGE-NEXT:          "column": 8
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 8,
+// RANGE-NEXT:          "column": 25
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 9,
+// RANGE-NEXT:          "column": 3
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 9,
+// RANGE-NEXT:          "column": 36
+// RANGE-NEXT:        }
+// RANGE-NEXT:      },
+// RANGE-NEXT:      {
+// RANGE-NEXT:        "from": {
+// RANGE-NEXT:          "line": 11,
+// RANGE-NEXT:          "column": 1
+// RANGE-NEXT:        },
+// RANGE-NEXT:        "to": {
+// RANGE-NEXT:          "line": 11,
+// RANGE-NEXT:          "column": 2
+// RANGE-NEXT:        }
+// RANGE-NEXT:      }
+// RANGE-NEXT:    ]
+// RANGE-NEXT:  }
+// RANGE-NEXT:]
+// RANGE-NEXT:}
+
+//--- foo.cppm
+export module foo;
+
+namespace piecemeal { // line 3
+  export int used(int n) { return n + 1; }
+  export int unused(int n) { return n + 2; }
+}
+
+export namespace whole { // line 8
+  int used(int n) { return n + 1; }
+  int unused(int n) { return n + 3; }
+} // line 11
+
+//--- use.cpp
+import foo;
+
+int main() {
+  piecemeal::used(4);  // only one of the functions used from each namespace.
+  whole::used(4);
+}