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1; RUN: opt < %s -passes=deadargelim -S | FileCheck %s2 3declare void @llvm.va_start(ptr)4 5define internal i32 @va_func(i32 %a, i32 %b, ...) {6 %valist = alloca i87 call void @llvm.va_start(ptr %valist)8 9 ret i32 %b10}11 12; Function derived from AArch64 ABI, where 8 integer arguments go in13; registers but the 9th goes on the stack. We really don't want to put14; just 7 args in registers and then start on the stack since any15; va_arg implementation already present in va_func won't be expecting16; it.17define i32 @call_va(i32 %in) {18 %stacked = alloca i3219 store i32 42, ptr %stacked20 %res = call i32(i32, i32, ...) @va_func(i32 %in, i32 %in, [6 x i32] poison, ptr byval(i32) %stacked)21 ret i32 %res22; CHECK: call i32 (i32, i32, ...) @va_func(i32 poison, i32 %in, [6 x i32] poison, ptr byval(i32) %stacked)23}24 25define internal i32 @va_deadret_func(i32 %a, i32 %b, ...) {26 %valist = alloca i827 call void @llvm.va_start(ptr %valist)28 29 ret i32 %a30}31 32define void @call_deadret(i32 %in) {33 %stacked = alloca i3234 store i32 42, ptr %stacked35 call i32 (i32, i32, ...) @va_deadret_func(i32 poison, i32 %in, [6 x i32] poison, ptr byval(i32) %stacked)36 ret void37; CHECK: call void (i32, i32, ...) @va_deadret_func(i32 poison, i32 poison, [6 x i32] poison, ptr byval(i32) %stacked)38}39