Alexandre Julliard : widl: Pass 16-byte structures by value on ARM64.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9cda4233df1e970251d0f5595f77b1bc95d6763f
URL:    https://gitlab.winehq.org/wine/wine/-/commit/9cda4233df1e970251d0f5595f77b1b...

Author: Alexandre Julliard 
Date:   Mon Apr 15 12:04:56 2024 +0200

widl: Pass 16-byte structures by value on ARM64.

---

tools/widl/typegen.c | 13 ++++++++++++-
 tools/widl/widl.c    |  2 +-
 tools/widl/widl.h    |  1 +
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/tools/widl/typegen.c b/tools/widl/typegen.c
index 917f4b40a21..52874b717fe 100644
--- a/tools/widl/typegen.c
+++ b/tools/widl/typegen.c
@@ -431,7 +431,18 @@ static unsigned int get_stack_size( const var_t *var, int *by_value )
     case TGT_UNION:
     case TGT_USER_TYPE:
         stack_size = type_memsize( var->declspec.type );
-        by_val = (pointer_size < 8 || stack_size <= pointer_size); /* FIXME: should be platform-specific */
+        switch (target.cpu)
+        {
+        case CPU_x86_64:
+            by_val = (stack_size <= pointer_size);
+            break;
+        case CPU_ARM64:
+            by_val = (stack_size <= 2 * pointer_size);
+            break;
+        default:
+            by_val = 1;
+            break;
+        }
         break;
     default:
         by_val = 0;
diff --git a/tools/widl/widl.c b/tools/widl/widl.c
index 6d7dd46c33e..30907eca69b 100644
--- a/tools/widl/widl.c
+++ b/tools/widl/widl.c
@@ -89,7 +89,7 @@ static const char usage[] =
 static const char version_string[] = "Wine IDL Compiler version " PACKAGE_VERSION "\n"
    		"Copyright 2002 Ove Kaaven\n";

-static struct target target;
+struct target target = { 0 };

int debuglevel = DEBUGLEVEL_NONE;
 int parser_debug, yy_flex_debug;
diff --git a/tools/widl/widl.h b/tools/widl/widl.h
index c5ccc140b36..31bb2c83694 100644
--- a/tools/widl/widl.h
+++ b/tools/widl/widl.h
@@ -71,6 +71,7 @@ extern const char *prefix_client;
 extern const char *prefix_server;
 extern unsigned int packing;
 extern unsigned int pointer_size;
+extern struct target target;
 extern time_t now;

extern int open_typelib( const char *name );