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LLVM: add DLL export attribute

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This was present in stage1 but missing from self-hosted.
This commit is contained in:
Andrew Kelley 2022-08-18 10:49:09 -07:00
parent 35f62bc7ae
commit 437311756d
4 changed files with 17 additions and 1 deletions
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2
src/Compilation.zig
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@ -1231,7 +1231,7 @@ pub fn create(gpa: Allocator, options: InitOptions) !*Compilation {
break :blk lm;
} else default_link_mode;
const dll_export_fns = if (options.dll_export_fns) |explicit| explicit else is_dyn_lib or options.rdynamic;
const dll_export_fns = options.dll_export_fns orelse (is_dyn_lib or options.rdynamic);
const libc_dirs = try detectLibCIncludeDirs(
arena,

4
src/Module.zig
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@ -6529,3 +6529,7 @@ pub fn addGlobalAssembly(mod: *Module, decl_index: Decl.Index, source: []const u
mod.global_assembly.putAssumeCapacityNoClobber(decl_index, duped_source);
}
pub fn wantDllExports(mod: Module) bool {
return mod.comp.bin_file.options.dll_export_fns and mod.getTarget().os.tag == .windows;
}

3
src/codegen/llvm.zig
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@ -1103,6 +1103,7 @@ pub const Object = struct {
}
llvm_global.setUnnamedAddr(.False);
llvm_global.setLinkage(.External);
if (module.wantDllExports()) llvm_global.setDLLStorageClass(.Default);
if (self.di_map.get(decl)) |di_node| {
if (try decl.isFunction()) {
const di_func = @ptrCast(*llvm.DISubprogram, di_node);
@ -1128,6 +1129,7 @@ pub const Object = struct {
const exp_name = exports[0].options.name;
llvm_global.setValueName2(exp_name.ptr, exp_name.len);
llvm_global.setUnnamedAddr(.False);
if (module.wantDllExports()) llvm_global.setDLLStorageClass(.DLLExport);
if (self.di_map.get(decl)) |di_node| {
if (try decl.isFunction()) {
const di_func = @ptrCast(*llvm.DISubprogram, di_node);
@ -1187,6 +1189,7 @@ pub const Object = struct {
defer module.gpa.free(fqn);
llvm_global.setValueName2(fqn.ptr, fqn.len);
llvm_global.setLinkage(.Internal);
if (module.wantDllExports()) llvm_global.setDLLStorageClass(.Default);
llvm_global.setUnnamedAddr(.True);
if (decl.val.castTag(.variable)) |variable| {
const single_threaded = module.comp.bin_file.options.single_threaded;

9
src/codegen/llvm/bindings.zig
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@ -223,6 +223,9 @@ pub const Value = opaque {
pub const setInitializer = LLVMSetInitializer;
extern fn LLVMSetInitializer(GlobalVar: *const Value, ConstantVal: *const Value) void;
pub const setDLLStorageClass = LLVMSetDLLStorageClass;
extern fn LLVMSetDLLStorageClass(Global: *const Value, Class: DLLStorageClass) void;
pub const addCase = LLVMAddCase;
extern fn LLVMAddCase(Switch: *const Value, OnVal: *const Value, Dest: *const BasicBlock) void;
@ -1482,6 +1485,12 @@ pub const CallAttr = enum(c_int) {
AlwaysInline,
};
pub const DLLStorageClass = enum(c_uint) {
Default,
DLLImport,
DLLExport,
};
pub const address_space = struct {
pub const default: c_uint = 0;