Enable getting non-boxed LLVM type from Julia Type (#56890)

The current method :jl_type_to_llvm takes a pointer-to-bool parameter
isboxed, which if non-null, is set to true if the Julia Type requires
boxing. However, one may want to know the julia type without boxing and
there is no mechanism for doing so. Now there is `julia_struct_to_llvm`.

(cherry picked from commit 85f1b8c)

Author: wsmoses

src/cgutils.cpp

@@ -622,13 +622,13 @@ static Value *emit_struct_gep(jl_codectx_t &ctx, Type *lty, Value *base, unsigne
 
 static Type *_julia_struct_to_llvm(jl_codegen_params_t *ctx, LLVMContext &ctxt, jl_value_t *jt, bool *isboxed, bool llvmcall=false);
 
-static Type *_julia_type_to_llvm(jl_codegen_params_t *ctx, LLVMContext &ctxt, jl_value_t *jt, bool *isboxed)
+static Type *_julia_type_to_llvm(jl_codegen_params_t *ctx, LLVMContext &ctxt, jl_value_t *jt, bool *isboxed, bool no_boxing)
 {
     // this function converts a Julia Type into the equivalent LLVM type
     if (isboxed) *isboxed = false;
     if (jt == (jl_value_t*)jl_bottom_type)
         return getVoidTy(ctxt);
-    if (jl_is_concrete_immutable(jt)) {
+    if (jl_is_concrete_immutable(jt) || no_boxing) {
         if (jl_datatype_nbits(jt) == 0)
             return getVoidTy(ctxt);
         Type *t = _julia_struct_to_llvm(ctx, ctxt, jt, isboxed);
@@ -641,13 +641,20 @@ static Type *_julia_type_to_llvm(jl_codegen_params_t *ctx, LLVMContext &ctxt, jl
 
 static Type *julia_type_to_llvm(jl_codectx_t &ctx, jl_value_t *jt, bool *isboxed)
 {
-    return _julia_type_to_llvm(&ctx.emission_context, ctx.builder.getContext(), jt, isboxed);
+    return _julia_type_to_llvm(&ctx.emission_context, ctx.builder.getContext(), jt, isboxed, false);
 }
 
 extern "C" JL_DLLEXPORT_CODEGEN
 Type *jl_type_to_llvm_impl(jl_value_t *jt, LLVMContextRef ctxt, bool *isboxed)
 {
-    return _julia_type_to_llvm(NULL, *unwrap(ctxt), jt, isboxed);
+    return _julia_type_to_llvm(NULL, *unwrap(ctxt), jt, isboxed, false);
+}
+
+
+extern "C" JL_DLLEXPORT_CODEGEN
+Type *jl_struct_to_llvm_impl(jl_value_t *jt, LLVMContextRef ctxt, bool *isboxed)
+{
+    return _julia_type_to_llvm(NULL, *unwrap(ctxt), jt, isboxed, true);
 }
 
 

src/codegen-stubs.c

@@ -97,6 +97,8 @@ JL_DLLEXPORT LLVMOrcThreadSafeModuleRef jl_get_llvm_module_fallback(void *native
 
 JL_DLLEXPORT void *jl_type_to_llvm_fallback(jl_value_t *jt, LLVMContextRef llvmctxt, bool_t *isboxed) UNAVAILABLE
 
+JL_DLLEXPORT void *jl_struct_to_llvm_fallback(jl_value_t *jt, LLVMContextRef llvmctxt, bool_t *isboxed) UNAVAILABLE
+
 JL_DLLEXPORT jl_value_t *jl_get_libllvm_fallback(void) JL_NOTSAFEPOINT
 {
     return jl_nothing;

src/jl_exported_funcs.inc

@@ -550,6 +550,7 @@
     YY(jl_dump_llvm_opt) \
     YY(jl_dump_fptr_asm) \
     YY(jl_get_function_id) \
+    YY(jl_struct_to_llvm) \
     YY(jl_type_to_llvm) \
     YY(jl_getUnwindInfo) \
     YY(jl_get_libllvm) \