1*67e74705SXin Li /* RUN: %clang_cc1 %s -emit-llvm -triple x86_64-apple-darwin -o - | FileCheck %s 2*67e74705SXin Li 3*67e74705SXin Li The FE must generate padding here both at the end of each PyG_Head and 4*67e74705SXin Li between array elements. Reduced from Python. */ 5*67e74705SXin Li 6*67e74705SXin Li typedef union _gc_head { 7*67e74705SXin Li struct { 8*67e74705SXin Li union _gc_head *gc_next; 9*67e74705SXin Li union _gc_head *gc_prev; 10*67e74705SXin Li long gc_refs; 11*67e74705SXin Li } gc; 12*67e74705SXin Li int dummy __attribute__((aligned(16))); 13*67e74705SXin Li } PyGC_Head; 14*67e74705SXin Li 15*67e74705SXin Li struct gc_generation { 16*67e74705SXin Li PyGC_Head head; 17*67e74705SXin Li int threshold; 18*67e74705SXin Li int count; 19*67e74705SXin Li }; 20*67e74705SXin Li 21*67e74705SXin Li #define GEN_HEAD(n) (&generations[n].head) 22*67e74705SXin Li 23*67e74705SXin Li // The idea is that there are 6 undefs in this structure initializer to cover 24*67e74705SXin Li // the padding between elements. 25*67e74705SXin Li // CHECK: @generations = global [3 x %struct.gc_generation] [%struct.gc_generation { %union._gc_head { %struct.anon { %union._gc_head* getelementptr inbounds ([3 x %struct.gc_generation], [3 x %struct.gc_generation]* @generations, i32 0, i32 0, i32 0), %union._gc_head* getelementptr inbounds ([3 x %struct.gc_generation], [3 x %struct.gc_generation]* @generations, i32 0, i32 0, i32 0), i64 0 }, [8 x i8] undef }, i32 700, i32 0, [8 x i8] undef }, %struct.gc_generation { %union._gc_head { %struct.anon { %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 48) to %union._gc_head*), %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 48) to %union._gc_head*), i64 0 }, [8 x i8] undef }, i32 10, i32 0, [8 x i8] undef }, %struct.gc_generation { %union._gc_head { %struct.anon { %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 96) to %union._gc_head*), %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 96) to %union._gc_head*), i64 0 }, [8 x i8] undef }, i32 10, i32 0, [8 x i8] undef }] 26*67e74705SXin Li /* linked lists of container objects */ 27*67e74705SXin Li struct gc_generation generations[3] = { 28*67e74705SXin Li /* PyGC_Head, threshold, count */ 29*67e74705SXin Li {{{GEN_HEAD(0), GEN_HEAD(0), 0}}, 700, 0}, 30*67e74705SXin Li {{{GEN_HEAD(1), GEN_HEAD(1), 0}}, 10, 0}, 31*67e74705SXin Li {{{GEN_HEAD(2), GEN_HEAD(2), 0}}, 10, 0}, 32*67e74705SXin Li }; 33