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implement coroutine suspend

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see #727
This commit is contained in:
Andrew Kelley
2018-02-26 02:46:21 -05:00
parent c60496a297
commit 3e86fb500d
4 changed files with 139 additions and 8 deletions
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22
src/codegen.cpp
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@@ -1066,6 +1066,21 @@ static LLVMValueRef get_coro_resume_fn_val(CodeGen *g) {
return g->coro_resume_fn_val;
}
static LLVMValueRef get_coro_save_fn_val(CodeGen *g) {
if (g->coro_save_fn_val)
return g->coro_save_fn_val;
LLVMTypeRef param_types[] = {
LLVMPointerType(LLVMInt8Type(), 0),
};
LLVMTypeRef fn_type = LLVMFunctionType(ZigLLVMTokenTypeInContext(LLVMGetGlobalContext()), param_types, 1, false);
Buf *name = buf_sprintf("llvm.coro.save");
g->coro_save_fn_val = LLVMAddFunction(g->module, buf_ptr(name), fn_type);
assert(LLVMGetIntrinsicID(g->coro_save_fn_val));
return g->coro_save_fn_val;
}
static LLVMValueRef get_return_address_fn_val(CodeGen *g) {
if (g->return_address_fn_val)
return g->return_address_fn_val;
@@ -3954,6 +3969,11 @@ static LLVMValueRef ir_render_coro_resume(CodeGen *g, IrExecutable *executable,
return LLVMBuildCall(g->builder, get_coro_resume_fn_val(g), &awaiter_handle, 1, "");
}
static LLVMValueRef ir_render_coro_save(CodeGen *g, IrExecutable *executable, IrInstructionCoroSave *instruction) {
LLVMValueRef coro_handle = ir_llvm_value(g, instruction->coro_handle);
return LLVMBuildCall(g->builder, get_coro_save_fn_val(g), &coro_handle, 1, "");
}
static void set_debug_location(CodeGen *g, IrInstruction *instruction) {
AstNode *source_node = instruction->source_node;
Scope *scope = instruction->scope;
@@ -4157,6 +4177,8 @@ static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable,
return ir_render_coro_free(g, executable, (IrInstructionCoroFree *)instruction);
case IrInstructionIdCoroResume:
return ir_render_coro_resume(g, executable, (IrInstructionCoroResume *)instruction);
case IrInstructionIdCoroSave:
return ir_render_coro_save(g, executable, (IrInstructionCoroSave *)instruction);
}
zig_unreachable();
}