[gcc r15-1602] Adjust DLL import/export implementation for AArch64

[Christophe Lyon via Gcc-cvs]

https://gcc.gnu.org/g:ed20feebd9ea31d58861f61205bd412b0c3febd0

commit r15-1602-ged20feebd9ea31d58861f61205bd412b0c3febd0
Author: Evgeny Karpov <evgeny.kar...@microsoft.com>
Date:   Mon Jun 24 12:46:54 2024 +0000

    Adjust DLL import/export implementation for AArch64
    
    The DLL import/export mingw implementation, originally from ix86,
    requires minor adjustments to be compatible with AArch64.
    
    2024-06-08  Evgeny Karpov <evgeny.kar...@microsoft.com>
    
            gcc/ChangeLog:
            * config/i386/cygming.h
            (PE_COFF_EXTERN_DECL_SHOULD_BE_LEGITIMIZED): Declare whether an
            external declaration should be legitimized.
            (HAVE_64BIT_POINTERS): Define whether the target supports 64-bit
            pointers.
            * config/mingw/mingw32.h (defined): Use the correct
            DllMainCRTStartup entry function.
            * config/mingw/winnt-dll.cc (defined): Exclude ix86-related code.

Diff:
---
 gcc/config/i386/cygming.h     | 5 +++++
 gcc/config/mingw/mingw32.h    | 2 +-
 gcc/config/mingw/winnt-dll.cc | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/gcc/config/i386/cygming.h b/gcc/config/i386/cygming.h
index 4bb8d7f920c..0493b3be875 100644
--- a/gcc/config/i386/cygming.h
+++ b/gcc/config/i386/cygming.h
@@ -472,3 +472,8 @@ do {                                                \
 
 #undef GOT_ALIAS_SET
 #define GOT_ALIAS_SET mingw_GOT_alias_set ()
+
+#define PE_COFF_EXTERN_DECL_SHOULD_BE_LEGITIMIZED \
+  ix86_cmodel == CM_LARGE_PIC || ix86_cmodel == CM_MEDIUM_PIC
+
+#define HAVE_64BIT_POINTERS TARGET_64BIT_DEFAULT
diff --git a/gcc/config/mingw/mingw32.h b/gcc/config/mingw/mingw32.h
index da8e1e8949e..0dfe8e995b6 100644
--- a/gcc/config/mingw/mingw32.h
+++ b/gcc/config/mingw/mingw32.h
@@ -82,7 +82,7 @@ along with GCC; see the file COPYING3.  If not see
 #endif
 
 #undef SUB_LINK_ENTRY
-#if TARGET_64BIT_DEFAULT
+#if HAVE_64BIT_POINTERS
 #define SUB_LINK_ENTRY SUB_LINK_ENTRY64
 #else
 #define SUB_LINK_ENTRY SUB_LINK_ENTRY32
diff --git a/gcc/config/mingw/winnt-dll.cc b/gcc/config/mingw/winnt-dll.cc
index 1354402a959..66c445cba77 100644
--- a/gcc/config/mingw/winnt-dll.cc
+++ b/gcc/config/mingw/winnt-dll.cc
@@ -206,7 +206,7 @@ legitimize_pe_coff_symbol (rtx addr, bool inreg)
        }
     }
 
-  if (ix86_cmodel != CM_LARGE_PIC && ix86_cmodel != CM_MEDIUM_PIC)
+  if (!PE_COFF_EXTERN_DECL_SHOULD_BE_LEGITIMIZED)
     return NULL_RTX;
 
   if (GET_CODE (addr) == SYMBOL_REF