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omit prefix data for async functions sometimes

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When `@frameSize` is never called, and `@asyncCall` on a runtime-known
pointer is never used, no prefix data for async functions is needed.

Related: #3160
This commit is contained in:
Andrew Kelley
2019-09-02 21:22:35 -04:00
parent 00d82e34df
commit d74b8567cf
3 changed files with 8 additions and 1 deletions
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5
src/codegen.cpp
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@@ -3775,6 +3775,7 @@ static void render_async_var_decls(CodeGen *g, Scope *scope) {
}
static LLVMValueRef gen_frame_size(CodeGen *g, LLVMValueRef fn_val) {
assert(g->need_frame_size_prefix_data);
LLVMTypeRef usize_llvm_type = g->builtin_types.entry_usize->llvm_type;
LLVMTypeRef ptr_usize_llvm_type = LLVMPointerType(usize_llvm_type, 0);
LLVMValueRef casted_fn_val = LLVMBuildBitCast(g->builder, fn_val, ptr_usize_llvm_type, "");
@@ -7208,7 +7209,9 @@ static void do_code_gen(CodeGen *g) {
LLVMTypeRef usize_type_ref = g->builtin_types.entry_usize->llvm_type;
LLVMValueRef size_val = LLVMConstInt(usize_type_ref, fn_table_entry->frame_type->abi_size, false);
ZigLLVMFunctionSetPrefixData(fn_table_entry->llvm_value, size_val);
if (g->need_frame_size_prefix_data) {
ZigLLVMFunctionSetPrefixData(fn_table_entry->llvm_value, size_val);
}
if (!g->strip_debug_symbols) {
AstNode *source_node = fn_table_entry->proto_node;