1; RUN: opt < %s -deadargelim -S | FileCheck %s
2
3declare void @llvm.va_start(i8*)
4
5define internal i32 @va_func(i32 %a, i32 %b, ...) {
6  %valist = alloca i8
7  call void @llvm.va_start(i8* %valist)
8
9  ret i32 %b
10}
11
12; Function derived from AArch64 ABI, where 8 integer arguments go in
13; registers but the 9th goes on the stack. We really don't want to put
14; just 7 args in registers and then start on the stack since any
15; va_arg implementation already present in va_func won't be expecting
16; it.
17define i32 @call_va(i32 %in) {
18  %stacked = alloca i32
19  store i32 42, i32* %stacked
20  %res = call i32(i32, i32, ...) @va_func(i32 %in, i32 %in, [6 x i32] undef, i32* byval(i32) %stacked)
21  ret i32 %res
22; CHECK: call i32 (i32, i32, ...) @va_func(i32 undef, i32 %in, [6 x i32] undef, i32* byval(i32) %stacked)
23}
24
25define internal i32 @va_deadret_func(i32 %a, i32 %b, ...) {
26  %valist = alloca i8
27  call void @llvm.va_start(i8* %valist)
28
29  ret i32 %a
30}
31
32define void @call_deadret(i32 %in) {
33  %stacked = alloca i32
34  store i32 42, i32* %stacked
35  call i32 (i32, i32, ...) @va_deadret_func(i32 undef, i32 %in, [6 x i32] undef, i32* byval(i32) %stacked)
36  ret void
37; CHECK: call void (i32, i32, ...) @va_deadret_func(i32 undef, i32 undef, [6 x i32] undef, i32* byval(i32) %stacked)
38}
39