stage1: back out the broken visibility changes

```
$ valgrind ./zig test ../test/behavior.zig -target powerpc-linux-musl -lc -I../test
==2828778== Invalid read of size 1
==2828778==    at 0x6EA0265: LLVMSetVisibility (in /home/andy/Downloads/zig/build/zig)
==2828778==    by 0x1BCE60B: do_code_gen(CodeGen*) (codegen.cpp:9031)
==2828778==    by 0x1BD51E2: codegen_build_object(CodeGen*) (codegen.cpp:10610)
==2828778==    by 0x1BA5C17: zig_stage1_build_object (stage1.cpp:132)
==2828778==    by 0xE61E24: Module.build_object (stage1.zig:149)
==2828778==    by 0xC3D4CE: Compilation.updateStage1Module (Compilation.zig:5025)
==2828778==    by 0xC3117E: Compilation.performAllTheWork (Compilation.zig:2691)
==2828778==    by 0xC2A3ED: Compilation.update (Compilation.zig:2098)
==2828778==    by 0xBB9D1F: main.updateModule (main.zig:3104)
==2828778==    by 0xB16B75: main.buildOutputType (main.zig:2793)
==2828778==    by 0xAD0526: main.mainArgs (main.zig:225)
==2828778==    by 0xACFCB9: main (stage1.zig:48)
```

Since the plan is to ship stage3 for Zig 0.10.0, the stage1
implementation of this hardly matters.

1 files changed, 0 insertions, 20 deletions

diff --git a/src/stage1/codegen.cpp b/src/stage1/codegen.cpp
index e057a8cc80..d101030c33 100644
--- a/src/stage1/codegen.cpp
+++ b/src/stage1/codegen.cpp
@@ -242,18 +242,6 @@ static LLVMLinkage to_llvm_linkage(GlobalLinkageId id, bool is_extern) {
     zig_unreachable();
 }
 
-static LLVMVisibility to_llvm_visibility(SymbolVisibilityId id) {
-    switch (id) {
-        case SymbolVisibilityIdDefault:
-            return LLVMDefaultVisibility;
-        case SymbolVisibilityIdHidden:
-            return LLVMHiddenVisibility;
-        case SymbolVisibilityIdProtected:
-            return LLVMProtectedVisibility;
-    }
-    zig_unreachable();
-}
-
 struct CalcLLVMFieldIndex {
     uint32_t offset;
     uint32_t field_index;
@@ -412,7 +400,6 @@ static LLVMValueRef make_fn_llvm_value(CodeGen *g, ZigFn *fn) {
     const char *unmangled_name = buf_ptr(&fn->symbol_name);
     const char *symbol_name;
     GlobalLinkageId linkage;
-    SymbolVisibilityId visibility = SymbolVisibilityIdDefault;
     if (fn->body_node == nullptr) {
         symbol_name = unmangled_name;
         linkage = GlobalLinkageIdStrong;
@@ -423,7 +410,6 @@ static LLVMValueRef make_fn_llvm_value(CodeGen *g, ZigFn *fn) {
         GlobalExport *fn_export = &fn->export_list.items[0];
         symbol_name = buf_ptr(&fn_export->name);
         linkage = fn_export->linkage;
-        visibility = fn_export->visibility;
     }
 
     CallingConvention cc = fn->type_entry->data.fn.fn_type_id.cc;
@@ -546,8 +532,6 @@ static LLVMValueRef make_fn_llvm_value(CodeGen *g, ZigFn *fn) {
         LLVMSetUnnamedAddr(llvm_fn, true);
     }
 
-    LLVMSetVisibility(llvm_fn, to_llvm_visibility(visibility));
-
     ZigType *return_type = fn_type->data.fn.fn_type_id.return_type;
     if (return_type->id == ZigTypeIdUnreachable) {
         addLLVMFnAttr(llvm_fn, "noreturn");
@@ -8967,7 +8951,6 @@ static void do_code_gen(CodeGen *g) {
         assert(var->decl_node);
 
         GlobalLinkageId linkage;
-        SymbolVisibilityId visibility = SymbolVisibilityIdDefault;
         const char *unmangled_name = var->name;
         const char *symbol_name;
         if (var->export_list.length == 0) {
@@ -8982,7 +8965,6 @@ static void do_code_gen(CodeGen *g) {
             GlobalExport *global_export = &var->export_list.items[0];
             symbol_name = buf_ptr(&global_export->name);
             linkage = global_export->linkage;
-            visibility = global_export->visibility;
         }
 
         LLVMValueRef global_value;
@@ -9028,8 +9010,6 @@ static void do_code_gen(CodeGen *g) {
             set_global_tls(g, var, global_value);
         }
 
-        LLVMSetVisibility(global_value, to_llvm_visibility(visibility));
-
         var->value_ref = global_value;
 
         for (size_t export_i = 1; export_i < var->export_list.length; export_i += 1) {