diff --git a/src/abg-writer.cc b/src/abg-writer.cc
index 03959bdc..8aa95948 100644
--- a/src/abg-writer.cc
+++ b/src/abg-writer.cc
@@ -2211,7 +2211,7 @@ write_canonical_types_of_scope(const scope_decl	&scope,
     {
       if (is_member_type)
 	write_member_type(*i, ctxt, indent);
-      else
+      else if (!ctxt.type_is_emitted(*i))
 	write_type(*i, ctxt, indent);
     }
 
diff --git a/tests/data/test-annotate/test14-pr18893.so.abi b/tests/data/test-annotate/test14-pr18893.so.abi
index 19be6587..fa106219 100644
--- a/tests/data/test-annotate/test14-pr18893.so.abi
+++ b/tests/data/test-annotate/test14-pr18893.so.abi
@@ -6327,8 +6327,6 @@
     </array-type-def>
     <!-- unnamed&#45;enum&#45;underlying&#45;type&#45;32 -->
     <type-decl name='unnamed-enum-underlying-type-32' is-anonymous='yes' size-in-bits='32' alignment-in-bits='32' id='type-id-12'/>
-    <!-- unsigned long int -->
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-3'/>
     <!-- unsigned long int[16] -->
     <array-type-def dimensions='1' type-id='type-id-3' size-in-bits='1024' id='type-id-388'>
       <!-- <anonymous range>[16] -->
diff --git a/tests/data/test-annotate/test15-pr18892.so.abi b/tests/data/test-annotate/test15-pr18892.so.abi
index e64f0ff7..a4c34ee5 100644
--- a/tests/data/test-annotate/test15-pr18892.so.abi
+++ b/tests/data/test-annotate/test15-pr18892.so.abi
@@ -7067,8 +7067,6 @@
     <typedef-decl name='uintptr_t' type-id='type-id-117' filepath='/usr/include/stdint.h' line='123' column='1' id='type-id-23'/>
     <!-- __sanitizer::LibbacktraceSymbolizer* const -->
     <qualified-type-def type-id='type-id-308' const='yes' id='type-id-309'/>
-    <!-- backtrace_state* -->
-    <pointer-type-def type-id='type-id-10' size-in-bits='64' id='type-id-22'/>
     <!-- int (void*, typedef uintptr_t, const char*, int, const char*)* -->
     <pointer-type-def type-id='type-id-30' size-in-bits='64' id='type-id-306'/>
     <!-- void (const char*, typedef size_t, void*)* -->
@@ -7439,8 +7437,6 @@
     <type-decl name='unnamed-enum-underlying-type-32' is-anonymous='yes' size-in-bits='32' alignment-in-bits='32' id='type-id-54'/>
     <!-- unsigned int -->
     <type-decl name='unsigned int' size-in-bits='32' id='type-id-147'/>
-    <!-- unsigned long int -->
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-117'/>
     <!-- void -->
     <type-decl name='void' id='type-id-25'/>
     <!-- __tsan::SyncClock* -->
@@ -9213,8 +9209,6 @@
     <pointer-type-def type-id='type-id-1187' size-in-bits='64' id='type-id-808'/>
     <!-- int (void*, void ()*)* -->
     <pointer-type-def type-id='type-id-1188' size-in-bits='64' id='type-id-846'/>
-    <!-- int (void*, void*)* -->
-    <pointer-type-def type-id='type-id-29' size-in-bits='64' id='type-id-13'/>
     <!-- int (void*, void**)* -->
     <pointer-type-def type-id='type-id-1189' size-in-bits='64' id='type-id-817'/>
     <!-- int (void*, void**, SIZE_T*)* -->
@@ -23305,8 +23299,6 @@
     </function-type>
   </abi-instr>
   <abi-instr address-size='64' path='../../.././libsanitizer/tsan/tsan_interface.cc' comp-dir-path='/tmp/legendre/spack-stage/spack-stage-ImG4Cf/gcc-4.9.2/x86_64-unknown-linux-gnu/libsanitizer/tsan' language='LANG_C_plus_plus'>
-    <!-- unsigned short int -->
-    <type-decl name='unsigned short int' size-in-bits='16' id='type-id-195'/>
     <!-- typedef __sanitizer::u16 uu16 -->
     <typedef-decl name='uu16' type-id='type-id-1271' filepath='../../.././libsanitizer/sanitizer_common/sanitizer_internal_defs.h' line='171' column='1' id='type-id-1274'/>
     <!-- typedef __sanitizer::u32 uu32 -->
diff --git a/tests/data/test-annotate/test19-pr19023-libtcmalloc_and_profiler.so.abi b/tests/data/test-annotate/test19-pr19023-libtcmalloc_and_profiler.so.abi
index 131b8078..a494418e 100644
--- a/tests/data/test-annotate/test19-pr19023-libtcmalloc_and_profiler.so.abi
+++ b/tests/data/test-annotate/test19-pr19023-libtcmalloc_and_profiler.so.abi
@@ -15691,15 +15691,11 @@
     </array-type-def>
     <!-- unsigned int -->
     <type-decl name='unsigned int' size-in-bits='32' id='type-id-1310'/>
-    <!-- unsigned long int -->
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-5'/>
     <!-- unsigned long int[65536] -->
     <array-type-def dimensions='1' type-id='type-id-5' size-in-bits='4194304' id='type-id-1502'>
       <!-- <anonymous range>[65536] -->
       <subrange length='65536' type-id='type-id-5' id='type-id-1503'/>
     </array-type-def>
-    <!-- unsigned short int -->
-    <type-decl name='unsigned short int' size-in-bits='16' id='type-id-22'/>
     <!-- variadic parameter type -->
     <type-decl name='variadic parameter type' id='type-id-1504'/>
     <!-- void -->
diff --git a/tests/data/test-annotate/test21-pr19092.so.abi b/tests/data/test-annotate/test21-pr19092.so.abi
index c742d7e4..6f769379 100644
--- a/tests/data/test-annotate/test21-pr19092.so.abi
+++ b/tests/data/test-annotate/test21-pr19092.so.abi
@@ -10448,85 +10448,6 @@
         <var-decl name='system_microseconds' type-id='type-id-28' visibility='default' filepath='../.././libiberty/../include/libiberty.h' line='564' column='1'/>
       </data-member>
     </class-decl>
-    <!-- struct pex_obj -->
-    <class-decl name='pex_obj' size-in-bits='1152' is-struct='yes' visibility='default' filepath='../.././libiberty/pex-common.h' line='54' column='1' id='type-id-130'>
-      <data-member access='public' layout-offset-in-bits='0'>
-        <!-- int pex_obj::flags -->
-        <var-decl name='flags' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='57' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='64'>
-        <!-- const char* pex_obj::pname -->
-        <var-decl name='pname' type-id='type-id-15' visibility='default' filepath='../.././libiberty/pex-common.h' line='59' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='128'>
-        <!-- const char* pex_obj::tempbase -->
-        <var-decl name='tempbase' type-id='type-id-15' visibility='default' filepath='../.././libiberty/pex-common.h' line='61' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='192'>
-        <!-- int pex_obj::next_input -->
-        <var-decl name='next_input' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='63' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='256'>
-        <!-- char* pex_obj::next_input_name -->
-        <var-decl name='next_input_name' type-id='type-id-33' visibility='default' filepath='../.././libiberty/pex-common.h' line='65' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='320'>
-        <!-- int pex_obj::next_input_name_allocated -->
-        <var-decl name='next_input_name_allocated' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='67' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='352'>
-        <!-- int pex_obj::stderr_pipe -->
-        <var-decl name='stderr_pipe' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='69' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='384'>
-        <!-- int pex_obj::count -->
-        <var-decl name='count' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='71' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='448'>
-        <!-- pid_t* pex_obj::children -->
-        <var-decl name='children' type-id='type-id-145' visibility='default' filepath='../.././libiberty/pex-common.h' line='73' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='512'>
-        <!-- int* pex_obj::status -->
-        <var-decl name='status' type-id='type-id-58' visibility='default' filepath='../.././libiberty/pex-common.h' line='75' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='576'>
-        <!-- pex_time* pex_obj::time -->
-        <var-decl name='time' type-id='type-id-146' visibility='default' filepath='../.././libiberty/pex-common.h' line='77' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='640'>
-        <!-- int pex_obj::number_waited -->
-        <var-decl name='number_waited' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='79' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='704'>
-        <!-- FILE* pex_obj::input_file -->
-        <var-decl name='input_file' type-id='type-id-75' visibility='default' filepath='../.././libiberty/pex-common.h' line='81' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='768'>
-        <!-- FILE* pex_obj::read_output -->
-        <var-decl name='read_output' type-id='type-id-75' visibility='default' filepath='../.././libiberty/pex-common.h' line='83' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='832'>
-        <!-- FILE* pex_obj::read_err -->
-        <var-decl name='read_err' type-id='type-id-75' visibility='default' filepath='../.././libiberty/pex-common.h' line='85' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='896'>
-        <!-- int pex_obj::remove_count -->
-        <var-decl name='remove_count' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='87' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='960'>
-        <!-- char** pex_obj::remove -->
-        <var-decl name='remove' type-id='type-id-123' visibility='default' filepath='../.././libiberty/pex-common.h' line='90' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='1024'>
-        <!-- const pex_funcs* pex_obj::funcs -->
-        <var-decl name='funcs' type-id='type-id-147' visibility='default' filepath='../.././libiberty/pex-common.h' line='92' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='1088'>
-        <!-- void* pex_obj::sysdep -->
-        <var-decl name='sysdep' type-id='type-id-14' visibility='default' filepath='../.././libiberty/pex-common.h' line='94' column='1'/>
-      </data-member>
-    </class-decl>
     <!-- struct pex_funcs -->
     <class-decl name='pex_funcs' size-in-bits='576' is-struct='yes' visibility='default' filepath='../.././libiberty/pex-common.h' line='99' column='1' id='type-id-479'>
       <data-member access='public' layout-offset-in-bits='0'>
diff --git a/tests/data/test-read-dwarf/test14-pr18893.so.abi b/tests/data/test-read-dwarf/test14-pr18893.so.abi
index cbfc0e19..03ef4898 100644
--- a/tests/data/test-read-dwarf/test14-pr18893.so.abi
+++ b/tests/data/test-read-dwarf/test14-pr18893.so.abi
@@ -4182,7 +4182,6 @@
       <subrange length='8' type-id='type-id-3' id='type-id-387'/>
     </array-type-def>
     <type-decl name='unnamed-enum-underlying-type-32' is-anonymous='yes' size-in-bits='32' alignment-in-bits='32' id='type-id-12'/>
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-3'/>
     <array-type-def dimensions='1' type-id='type-id-3' size-in-bits='1024' id='type-id-388'>
       <subrange length='16' type-id='type-id-3' id='type-id-389'/>
     </array-type-def>
diff --git a/tests/data/test-read-dwarf/test15-pr18892.so.abi b/tests/data/test-read-dwarf/test15-pr18892.so.abi
index 358000f0..6edc2e0e 100644
--- a/tests/data/test-read-dwarf/test15-pr18892.so.abi
+++ b/tests/data/test-read-dwarf/test15-pr18892.so.abi
@@ -3938,7 +3938,6 @@
     <typedef-decl name='backtrace_syminfo_callback' type-id='type-id-307' filepath='../../.././libsanitizer/../libbacktrace/backtrace.h' line='175' column='1' id='type-id-28'/>
     <typedef-decl name='uintptr_t' type-id='type-id-117' filepath='/usr/include/stdint.h' line='123' column='1' id='type-id-23'/>
     <qualified-type-def type-id='type-id-308' const='yes' id='type-id-309'/>
-    <pointer-type-def type-id='type-id-10' size-in-bits='64' id='type-id-22'/>
     <pointer-type-def type-id='type-id-30' size-in-bits='64' id='type-id-306'/>
     <pointer-type-def type-id='type-id-83' size-in-bits='64' id='type-id-304'/>
     <pointer-type-def type-id='type-id-31' size-in-bits='64' id='type-id-305'/>
@@ -4173,7 +4172,6 @@
     <type-decl name='sizetype' size-in-bits='64' id='type-id-44'/>
     <type-decl name='unnamed-enum-underlying-type-32' is-anonymous='yes' size-in-bits='32' alignment-in-bits='32' id='type-id-54'/>
     <type-decl name='unsigned int' size-in-bits='32' id='type-id-147'/>
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-117'/>
     <type-decl name='void' id='type-id-25'/>
     <pointer-type-def type-id='type-id-340' size-in-bits='64' id='type-id-341'/>
     <pointer-type-def type-id='type-id-342' size-in-bits='64' id='type-id-343'/>
@@ -5177,7 +5175,6 @@
     <pointer-type-def type-id='type-id-1186' size-in-bits='64' id='type-id-941'/>
     <pointer-type-def type-id='type-id-1187' size-in-bits='64' id='type-id-808'/>
     <pointer-type-def type-id='type-id-1188' size-in-bits='64' id='type-id-846'/>
-    <pointer-type-def type-id='type-id-29' size-in-bits='64' id='type-id-13'/>
     <pointer-type-def type-id='type-id-1189' size-in-bits='64' id='type-id-817'/>
     <pointer-type-def type-id='type-id-1190' size-in-bits='64' id='type-id-674'/>
     <pointer-type-def type-id='type-id-1191' size-in-bits='64' id='type-id-787'/>
@@ -12961,7 +12958,6 @@
     </function-type>
   </abi-instr>
   <abi-instr address-size='64' path='../../.././libsanitizer/tsan/tsan_interface.cc' comp-dir-path='/tmp/legendre/spack-stage/spack-stage-ImG4Cf/gcc-4.9.2/x86_64-unknown-linux-gnu/libsanitizer/tsan' language='LANG_C_plus_plus'>
-    <type-decl name='unsigned short int' size-in-bits='16' id='type-id-195'/>
     <typedef-decl name='uu16' type-id='type-id-1271' filepath='../../.././libsanitizer/sanitizer_common/sanitizer_internal_defs.h' line='171' column='1' id='type-id-1274'/>
     <typedef-decl name='uu32' type-id='type-id-204' filepath='../../.././libsanitizer/sanitizer_common/sanitizer_internal_defs.h' line='172' column='1' id='type-id-1275'/>
     <typedef-decl name='uu64' type-id='type-id-131' filepath='../../.././libsanitizer/sanitizer_common/sanitizer_internal_defs.h' line='173' column='1' id='type-id-1276'/>
diff --git a/tests/data/test-read-dwarf/test16-pr18904.so.abi b/tests/data/test-read-dwarf/test16-pr18904.so.abi
index 8ee54646..efca4645 100644
--- a/tests/data/test-read-dwarf/test16-pr18904.so.abi
+++ b/tests/data/test-read-dwarf/test16-pr18904.so.abi
@@ -11234,7 +11234,6 @@
     <type-decl name='char' size-in-bits='8' id='type-id-166'/>
     <type-decl name='long int' size-in-bits='64' id='type-id-222'/>
     <type-decl name='long long int' size-in-bits='64' id='type-id-212'/>
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-6'/>
     <type-decl name='void' id='type-id-154'/>
     <class-decl name='Marshaller' size-in-bits='256' visibility='default' filepath='../../../gcc/liboffloadmic/runtime/offload_common.h' line='388' column='1' id='type-id-285'>
       <data-member access='private' layout-offset-in-bits='0'>
@@ -18092,7 +18091,6 @@
     <type-decl name='long long unsigned int' size-in-bits='64' id='type-id-3500'/>
     <type-decl name='signed char' size-in-bits='8' id='type-id-52'/>
     <type-decl name='unnamed-enum-underlying-type-32' is-anonymous='yes' size-in-bits='32' alignment-in-bits='32' id='type-id-29'/>
-    <type-decl name='unsigned short int' size-in-bits='16' id='type-id-57'/>
     <type-decl name='variadic parameter type' id='type-id-3501'/>
     <type-decl name='wchar_t' size-in-bits='32' id='type-id-9'/>
     <typedef-decl name='wint_t' type-id='type-id-2' filepath='/export/users/iverbin/gcc_build_host/gcc/include/stddef.h' line='357' column='1' id='type-id-3502'/>
diff --git a/tests/data/test-read-dwarf/test19-pr19023-libtcmalloc_and_profiler.so.abi b/tests/data/test-read-dwarf/test19-pr19023-libtcmalloc_and_profiler.so.abi
index 38fd82e3..781d63e8 100644
--- a/tests/data/test-read-dwarf/test19-pr19023-libtcmalloc_and_profiler.so.abi
+++ b/tests/data/test-read-dwarf/test19-pr19023-libtcmalloc_and_profiler.so.abi
@@ -9542,11 +9542,9 @@
       <subrange length='2169' type-id='type-id-5' id='type-id-1501'/>
     </array-type-def>
     <type-decl name='unsigned int' size-in-bits='32' id='type-id-1310'/>
-    <type-decl name='unsigned long int' size-in-bits='64' id='type-id-5'/>
     <array-type-def dimensions='1' type-id='type-id-5' size-in-bits='4194304' id='type-id-1502'>
       <subrange length='65536' type-id='type-id-5' id='type-id-1503'/>
     </array-type-def>
-    <type-decl name='unsigned short int' size-in-bits='16' id='type-id-22'/>
     <type-decl name='variadic parameter type' id='type-id-1504'/>
     <type-decl name='void' id='type-id-60'/>
     <array-type-def dimensions='1' type-id='type-id-58' size-in-bits='1984' id='type-id-1505'>
diff --git a/tests/data/test-read-dwarf/test21-pr19092.so.abi b/tests/data/test-read-dwarf/test21-pr19092.so.abi
index b4a20a04..77245cd0 100644
--- a/tests/data/test-read-dwarf/test21-pr19092.so.abi
+++ b/tests/data/test-read-dwarf/test21-pr19092.so.abi
@@ -6744,65 +6744,6 @@
         <var-decl name='system_microseconds' type-id='type-id-28' visibility='default' filepath='../.././libiberty/../include/libiberty.h' line='564' column='1'/>
       </data-member>
     </class-decl>
-    <class-decl name='pex_obj' size-in-bits='1152' is-struct='yes' visibility='default' filepath='../.././libiberty/pex-common.h' line='54' column='1' id='type-id-130'>
-      <data-member access='public' layout-offset-in-bits='0'>
-        <var-decl name='flags' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='57' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='64'>
-        <var-decl name='pname' type-id='type-id-15' visibility='default' filepath='../.././libiberty/pex-common.h' line='59' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='128'>
-        <var-decl name='tempbase' type-id='type-id-15' visibility='default' filepath='../.././libiberty/pex-common.h' line='61' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='192'>
-        <var-decl name='next_input' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='63' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='256'>
-        <var-decl name='next_input_name' type-id='type-id-33' visibility='default' filepath='../.././libiberty/pex-common.h' line='65' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='320'>
-        <var-decl name='next_input_name_allocated' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='67' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='352'>
-        <var-decl name='stderr_pipe' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='69' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='384'>
-        <var-decl name='count' type-id='type-id-18' visibility='default' filepath='../.././libiberty/pex-common.h' line='71' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='448'>
-        <var-decl name='children' type-id='type-id-145' visibility='default' filepath='../.././libiberty/pex-common.h' line='73' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='512'>
-        <var-decl name='status' type-id='type-id-58' visibility='default' filepath='../.././libiberty/pex-common.h' line='75' column='1'/>
-      </data-member>
-      <data-member access='public' layout-offset-in-bits='576'>
-        <var-decl name='time' type-id='type-id-146' visibility='default' filepath='../.././libiberty/pex-common.h' line='77' column='1'/>
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-      <data-member access='public' layout-offset-in-bits='640'>
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diff --git a/tests/data/test-read-dwarf/test22-pr19097-libstdc++.so.6.0.17.so.abi b/tests/data/test-read-dwarf/test22-pr19097-libstdc++.so.6.0.17.so.abi
index 1739af09..31342d1c 100644
--- a/tests/data/test-read-dwarf/test22-pr19097-libstdc++.so.6.0.17.so.abi
+++ b/tests/data/test-read-dwarf/test22-pr19097-libstdc++.so.6.0.17.so.abi
@@ -8244,7 +8244,6 @@
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diff --git a/tests/data/test-read-dwarf/test9-pr18818-clang.so.abi b/tests/data/test-read-dwarf/test9-pr18818-clang.so.abi
index 7db018e4..cc3f6554 100644
--- a/tests/data/test-read-dwarf/test9-pr18818-clang.so.abi
+++ b/tests/data/test-read-dwarf/test9-pr18818-clang.so.abi
@@ -4949,24 +4949,6 @@
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