fixup! add test

Author: Michael137

llvm/test/tools/dsymutil/AArch64/dummy-debug-map-arm64.map

@@ -11,9 +11,13 @@ objects:
   - filename: 1.o
     symbols:
       - { sym: _bar, objAddr: 0x0, binAddr: 0x10000, size: 0x10 }
+      - { sym: __Z13lib1_internalv, objAddr: 0x0, binAddr: 0x10020, size: 0x20 }
+      - { sym: __ZN3Foo4funcIZ13lib1_internalvE3$_0EEvv, objAddr: 0x0, binAddr: 0x10040, size: 0x20 }
   - filename: 2.o
     symbols:
       - { sym: __Z3foov, objAddr: 0x0, binAddr: 0x20000, size: 0x10 }
+      - { sym: __Z13lib1_internalv, objAddr: 0x0, binAddr: 0x20020, size: 0x20 }
+      - { sym: __ZN3Foo4funcIZ13lib1_internalvE3$_0EEvv, objAddr: 0x0, binAddr: 0x20040, size: 0x20 }
   - filename: 3.o
     symbols:
       - { sym: __Z3foov, objAddr: 0x0, binAddr: 0x30000, size: 0x10 }

llvm/test/tools/dsymutil/AArch64/odr-uniquing-DW_AT_name-conflict.test

@@ -0,0 +1,28 @@
+# Tests the case where a DW_TAG_subprogram for a method declaration
+# got uniqued into a DW_TAG_subprogram with the same linkage name (but
+# different DW_AT_name). Make sure the DW_TAG_subprogram DIE for the
+# definition, which previously pointed to the now de-deduplicated declaration,
+# gets inserted into the .debug_names table using the DW_AT_name of the canonical
+# declaration DW_TAG_subprogram.
+#
+# Object files compiled as follows:
+#   clang -g -c -o 1.o Inputs/odr-uniquing-DW_AT_name-conflict/lib1.cpp
+#   clang -g -c -o 2.o Inputs/odr-uniquing-DW_AT_name-conflict/lib2.cpp
+
+# RUN: dsymutil -f -oso-prepend-path=%p/../Inputs/odr-uniquing-DW_AT_name-conflict -y %p/dummy-debug-map-arm64.map -o - \
+# RUN:     | llvm-dwarfdump --verify - | FileCheck %s
+
+# RUN: dsymutil --linker parallel -f -oso-prepend-path=%p/../Inputs/odr-uniquing-DW_AT_name-conflict -y %p/dummy-debug-map-arm64.map -o - \
+# RUN:     | not llvm-dwarfdump --verify - | FileCheck %s --check-prefix=PARALLEL-ODR
+
+# RUN: dsymutil -f -oso-prepend-path=%p/../Inputs/odr-uniquing-DW_AT_name-conflict -y %p/dummy-debug-map-arm64.map -no-odr -o - \
+# RUN:     | llvm-dwarfdump --verify - | FileCheck %s
+
+# RUN: dsymutil --linker parallel -f -oso-prepend-path=%p/../Inputs/odr-uniquing-DW_AT_name-conflict -y %p/dummy-debug-map-arm64.map -no-odr -o - \
+# RUN:     | llvm-dwarfdump --verify - | FileCheck %s
+
+# CHECK: No errors.
+
+# FIXME: parallel DWARFLinker uses wrong DW_AT_name when inserting uniqued subprogram into .debug_names
+# PARALLEL-ODR:      Verifying .debug_names...
+# PARALLEL-ODR-NEXT: error: Name Index {{.*}} mismatched Name of DIE

llvm/test/tools/dsymutil/Inputs/odr-uniquing-DW_AT_name-conflict/1.o

@@ -0,0 +1,5 @@
+#include "lib1.h"
+
+[[gnu::weak]] void lib1_internal() {
+  Foo{}.func<decltype([]{})>();
+}

llvm/test/tools/dsymutil/Inputs/odr-uniquing-DW_AT_name-conflict/2.o

@@ -0,0 +1,3 @@
+struct Foo {
+  template<typename T> void func() {}
+};

llvm/test/tools/dsymutil/Inputs/odr-uniquing-DW_AT_name-conflict/lib1.cpp

@@ -0,0 +1,5 @@
+#include "lib1.h"
+
+[[gnu::weak]] void lib1_internal() {
+  Foo{}.func<decltype([]{})>();
+}

llvm/test/tools/dsymutil/Inputs/odr-uniquing-DW_AT_name-conflict/lib1.h

@@ -0,0 +1,6 @@
+[[gnu::weak]] void lib1_internal();
+
+int main() {
+    lib1_internal();
+    __builtin_debugtrap();
+}