llvm-6502/test/CodeGen/X86/GC/argpromotion.ll

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; RUN: opt < %s -argpromotion
declare void @llvm.gcroot(i8**, i8*)
define i32 @g() {
entry:
%var = alloca i32
store i32 1, i32* %var
%x = call i32 @f(i32* %var)
ret i32 %x
}
define internal i32 @f(i32* %xp) gc "example" {
entry:
%var = alloca i8*
call void @llvm.gcroot(i8** %var, i8* null)
%x = load i32* %xp
ret i32 %x
}