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Don't save/restore stack on newStackCall to noreturn function

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This commit is contained in:
Noam Preil 2019-10-26 13:02:32 -04:00 committed by Andrew Kelley
parent ee21bab253
commit b8305b5648
1 changed files with 9 additions and 6 deletions
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15
src/codegen.cpp
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@ -4209,15 +4209,19 @@ static LLVMValueRef ir_render_call(CodeGen *g, IrExecutable *executable, IrInstr
} else if (instruction->modifier == CallModifierAsync) {
zig_panic("TODO @asyncCall of non-async function");
} else {
LLVMValueRef stacksave_fn_val = get_stacksave_fn_val(g);
LLVMValueRef stackrestore_fn_val = get_stackrestore_fn_val(g);
LLVMValueRef new_stack_addr = get_new_stack_addr(g, ir_llvm_value(g, instruction->new_stack));
LLVMValueRef old_stack_ref = LLVMBuildCall(g->builder, stacksave_fn_val, nullptr, 0, "");
LLVMValueRef old_stack_ref;
if (src_return_type->id != ZigTypeIdUnreachable) {
LLVMValueRef stacksave_fn_val = get_stacksave_fn_val(g);
old_stack_ref = LLVMBuildCall(g->builder, stacksave_fn_val, nullptr, 0, "");
}
gen_set_stack_pointer(g, new_stack_addr);
result = ZigLLVMBuildCall(g->builder, fn_val,
gen_param_values.items, (unsigned)gen_param_values.length, llvm_cc, fn_inline, "");
LLVMBuildCall(g->builder, stackrestore_fn_val, &old_stack_ref, 1, "");
if (src_return_type->id != ZigTypeIdUnreachable) {
LLVMValueRef stackrestore_fn_val = get_stackrestore_fn_val(g);
LLVMBuildCall(g->builder, stackrestore_fn_val, &old_stack_ref, 1, "");
}
}
if (src_return_type->id == ZigTypeIdUnreachable) {
@ -10409,4 +10413,3 @@ void codegen_switch_sub_prog_node(CodeGen *g, Stage2ProgressNode *node) {
}
g->sub_progress_node = node;
}