[gcc r12-3348] Fix some GC issues in the aarch64 back-end.

[gcc r12-3348] Fix some GC issues in the aarch64 back-end.

[Andrew Pinski]

https://gcc.gnu.org/g:98f1dd0212d57659d1234914791f51ca9f3aba89

commit r12-3348-g98f1dd0212d57659d1234914791f51ca9f3aba89
Author: Andrew Pinski <apinski@marvell.com>
Date:   Fri Sep 3 02:12:29 2021 +0000

    Fix some GC issues in the aarch64 back-end.
    
    I got some ICEs in my latest testsing while running the libstdc++ testsuite.
    I had noticed the problem was connected to types and had just touched the
    builtins code but nothing which could have caused this and I looked for
    some types/variables that were not being marked with GTY.
    
    OK? Bootstrapped and tested on aarch64-linux-gnu with no regressions.
    
    gcc/ChangeLog:
    
            * config/aarch64/aarch64-builtins.c (struct aarch64_simd_type_info):
            Mark with GTY.
            (aarch64_simd_types): Likewise.
            (aarch64_simd_intOI_type_node): Likewise.
            (aarch64_simd_intCI_type_node): Likewise.
            (aarch64_simd_intXI_type_node): Likewise.
            * config/aarch64/aarch64.h (aarch64_fp16_type_node): Likewise.
            (aarch64_fp16_ptr_type_node): Likewise.
            (aarch64_bf16_type_node): Likewise.
            (aarch64_bf16_ptr_type_node): Likewise.

Diff:
---
 gcc/config/aarch64/aarch64-builtins.c | 10 +++++-----
 gcc/config/aarch64/aarch64.h          |  8 ++++----
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/gcc/config/aarch64/aarch64-builtins.c b/gcc/config/aarch64/aarch64-builtins.c
index f6b41d9c200..eef9fc0f444 100644
--- a/gcc/config/aarch64/aarch64-builtins.c
+++ b/gcc/config/aarch64/aarch64-builtins.c
@@ -593,7 +593,7 @@ enum aarch64_simd_type
 };
 #undef ENTRY
 
-struct aarch64_simd_type_info
+struct GTY(()) aarch64_simd_type_info
 {
   enum aarch64_simd_type type;
 
@@ -625,14 +625,14 @@ struct aarch64_simd_type_info
 
 #define ENTRY(E, M, Q, G)  \
   {E, "__" #E, #G "__" #E, NULL_TREE, NULL_TREE, E_##M##mode, qualifier_##Q},
-static struct aarch64_simd_type_info aarch64_simd_types [] = {
+static GTY(()) struct aarch64_simd_type_info aarch64_simd_types [] = {
 #include "aarch64-simd-builtin-types.def"
 };
 #undef ENTRY
 
-static tree aarch64_simd_intOI_type_node = NULL_TREE;
-static tree aarch64_simd_intCI_type_node = NULL_TREE;
-static tree aarch64_simd_intXI_type_node = NULL_TREE;
+static GTY(()) tree aarch64_simd_intOI_type_node = NULL_TREE;
+static GTY(()) tree aarch64_simd_intCI_type_node = NULL_TREE;
+static GTY(()) tree aarch64_simd_intXI_type_node = NULL_TREE;
 
 /* The user-visible __fp16 type, and a pointer to that type.  Used
    across the back-end.  */
diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index bfffbcd6abf..a5ba6c24037 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -1262,13 +1262,13 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
 
 /* This type is the user-visible __fp16, and a pointer to that type.  We
    need it in many places in the backend.  Defined in aarch64-builtins.c.  */
-extern tree aarch64_fp16_type_node;
-extern tree aarch64_fp16_ptr_type_node;
+extern GTY(()) tree aarch64_fp16_type_node;
+extern GTY(()) tree aarch64_fp16_ptr_type_node;
 
 /* This type is the user-visible __bf16, and a pointer to that type.  Defined
    in aarch64-builtins.c.  */
-extern tree aarch64_bf16_type_node;
-extern tree aarch64_bf16_ptr_type_node;
+extern GTY(()) tree aarch64_bf16_type_node;
+extern GTY(()) tree aarch64_bf16_ptr_type_node;
 
 /* The generic unwind code in libgcc does not initialize the frame pointer.
    So in order to unwind a function using a frame pointer, the very first