[Feature #19579] Remove !USE_RVARGC code (#7655)

Remove !USE_RVARGC code

[Feature #19579]

The Variable Width Allocation feature was turned on by default in Ruby
3.2. Since then, we haven't received bug reports or backports to the
non-Variable Width Allocation code paths, so we assume that nobody is
using it. We also don't plan on maintaining the non-Variable Width
Allocation code, so we are going to remove it.

1 files changed, 5 insertions, 0 deletions

diff --git a/rjit_c.rb b/rjit_c.rb
index 843ee53295..ae79788356 100644
--- a/rjit_c.rb
+++ b/rjit_c.rb
@@ -857,6 +857,11 @@ module RubyVM::RJIT # :nodoc: all
             shared: self.VALUE,
           ), Primitive.cexpr!("OFFSETOF(((struct RString *)NULL)->as.heap, aux)")],
         ),
+        embed: CType::Struct.new(
+          "", Primitive.cexpr!("SIZEOF(((struct RString *)NULL)->as.embed)"),
+          len: [CType::Immediate.parse("long"), Primitive.cexpr!("OFFSETOF(((struct RString *)NULL)->as.embed, len)")],
+          ary: [CType::Pointer.new { CType::Immediate.parse("char") }, Primitive.cexpr!("OFFSETOF(((struct RString *)NULL)->as.embed, ary)")],
+        ),
       ), Primitive.cexpr!("OFFSETOF((*((struct RString *)NULL)), as)")],
     )
   end