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