[Bug target/79905] ICE in canonical types differ for identical types __vector(4) int and V4i {aka __vector(4) int}

[pthaugen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79905

Pat Haugen <pthaugen at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pthaugen at gcc dot gnu.org

--- Comment #2 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
Reduced testcase.

pthaugen@pike:~/temp/creduce$ cat junk.cpp
typedef int V4i __attribute__((vector_size(16)));
void a(V4i ) {
  vector int b;
  a(b);
}

pthaugen@pike:~/temp/creduce$ ~/install/gcc/trunk/bin/g++ -S junk.cpp
junk.cpp: In function ‘void a(V4i)’:
junk.cpp:4:6: internal compiler error: canonical types differ for identical
types __vector(4) int and V4i {aka __vector(4) int}
   a(b);
      ^
0x1038318b comptypes(tree_node*, tree_node*, int)
        /home/pthaugen/src/gcc/trunk/gcc/gcc/cp/typeck.c:1433
0x1019524f standard_conversion
        /home/pthaugen/src/gcc/trunk/gcc/gcc/cp/call.c:1187
0x101a6af3 implicit_conversion
        /home/pthaugen/src/gcc/trunk/gcc/gcc/cp/call.c:1839
...