1*f4a2713aSLionel Sambuc /* RUN: %clang_cc1 %s -emit-llvm -triple x86_64-apple-darwin -o - | FileCheck %s 2*f4a2713aSLionel Sambuc 3*f4a2713aSLionel Sambuc The FE must generate padding here both at the end of each PyG_Head and 4*f4a2713aSLionel Sambuc between array elements. Reduced from Python. */ 5*f4a2713aSLionel Sambuc 6*f4a2713aSLionel Sambuc typedef union _gc_head { 7*f4a2713aSLionel Sambuc struct { 8*f4a2713aSLionel Sambuc union _gc_head *gc_next; 9*f4a2713aSLionel Sambuc union _gc_head *gc_prev; 10*f4a2713aSLionel Sambuc long gc_refs; 11*f4a2713aSLionel Sambuc } gc; 12*f4a2713aSLionel Sambuc int dummy __attribute__((aligned(16))); 13*f4a2713aSLionel Sambuc } PyGC_Head; 14*f4a2713aSLionel Sambuc 15*f4a2713aSLionel Sambuc struct gc_generation { 16*f4a2713aSLionel Sambuc PyGC_Head head; 17*f4a2713aSLionel Sambuc int threshold; 18*f4a2713aSLionel Sambuc int count; 19*f4a2713aSLionel Sambuc }; 20*f4a2713aSLionel Sambuc 21*f4a2713aSLionel Sambuc #define GEN_HEAD(n) (&generations[n].head) 22*f4a2713aSLionel Sambuc 23*f4a2713aSLionel Sambuc // The idea is that there are 6 undefs in this structure initializer to cover 24*f4a2713aSLionel Sambuc // the padding between elements. 25*f4a2713aSLionel Sambuc // 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]* @generations, i32 0, i32 0, i32 0), %union._gc_head* getelementptr inbounds ([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* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 48) to %union._gc_head*), %union._gc_head* bitcast (i8* getelementptr (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* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 96) to %union._gc_head*), %union._gc_head* bitcast (i8* getelementptr (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*f4a2713aSLionel Sambuc /* linked lists of container objects */ 27*f4a2713aSLionel Sambuc struct gc_generation generations[3] = { 28*f4a2713aSLionel Sambuc /* PyGC_Head, threshold, count */ 29*f4a2713aSLionel Sambuc {{{GEN_HEAD(0), GEN_HEAD(0), 0}}, 700, 0}, 30*f4a2713aSLionel Sambuc {{{GEN_HEAD(1), GEN_HEAD(1), 0}}, 10, 0}, 31*f4a2713aSLionel Sambuc {{{GEN_HEAD(2), GEN_HEAD(2), 0}}, 10, 0}, 32*f4a2713aSLionel Sambuc }; 33