fix: get llvm type of global val

Author: LYF1999

compiler/rustc_codegen_llvm/src/consts.rs

@@ -390,7 +390,7 @@ impl<'ll> CodegenCx<'ll, '_> {
             let val_llty = self.val_ty(v);
 
             let g = self.get_static_inner(def_id, val_llty);
-            let llty = self.val_ty(g);
+            let llty = llvm::LLVMRustGetGlobalValType(g);
 
             let g = if val_llty == llty {
                 g

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -974,6 +974,7 @@ extern "C" {
     pub fn LLVMGetAlignment(Global: &Value) -> c_uint;
     pub fn LLVMSetAlignment(Global: &Value, Bytes: c_uint);
     pub fn LLVMSetDLLStorageClass(V: &Value, C: DLLStorageClass);
+    pub fn LLVMRustGetGlobalValType(Global: &Value) -> &Type;
 
     // Operations on global variables
     pub fn LLVMIsAGlobalVariable(GlobalVar: &Value) -> Option<&Value>;

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -1741,6 +1741,11 @@ extern "C" void LLVMRustSetLinkage(LLVMValueRef V,
   LLVMSetLinkage(V, fromRust(RustLinkage));
 }
 
+
+extern "C" LLVMTypeRef LLVMRustGetGlobalValType(LLVMValueRef Global) {
+  return wrap(unwrap<GlobalValue>(Global)->getValueType());
+}
+
 extern "C" bool LLVMRustConstIntGetZExtValue(LLVMValueRef CV, uint64_t *value) {
   auto C = unwrap<llvm::ConstantInt>(CV);
   if (C->getBitWidth() > 64)