1 /* RUN: %clang_cc1 %s -emit-llvm -triple x86_64-apple-darwin -o - | FileCheck %s 2 /* RUN: %clang_cc1 %s -emit-llvm -triple x86_64-apple-darwin -o - -fexperimental-new-constant-interpreter | FileCheck %s 3 4 The FE must generate padding here both at the end of each PyG_Head and 5 between array elements. Reduced from Python. */ 6 7 typedef union _gc_head { 8 struct { 9 union _gc_head *gc_next; 10 union _gc_head *gc_prev; 11 long gc_refs; 12 } gc; 13 int dummy __attribute__((aligned(16))); 14 } PyGC_Head; 15 16 struct gc_generation { 17 PyGC_Head head; 18 int threshold; 19 int count; 20 }; 21 22 #define GEN_HEAD(n) (&generations[n].head) 23 24 // The idea is that there are 6 zeroinitializers in this structure initializer to cover 25 // the padding between elements. 26 // CHECK: @generations ={{.*}} global [3 x %struct.gc_generation] [%struct.gc_generation { %union._gc_head { %struct.anon { ptr @generations, ptr @generations, i64 0 }, [8 x i8] zeroinitializer }, i32 700, i32 0, [8 x i8] zeroinitializer }, %struct.gc_generation { %union._gc_head { %struct.anon { ptr getelementptr (i8, ptr @generations, i64 48), ptr getelementptr (i8, ptr @generations, i64 48), i64 0 }, [8 x i8] zeroinitializer }, i32 10, i32 0, [8 x i8] zeroinitializer }, %struct.gc_generation { %union._gc_head { %struct.anon { ptr getelementptr (i8, ptr @generations, i64 96), ptr getelementptr (i8, ptr @generations, i64 96), i64 0 }, [8 x i8] zeroinitializer }, i32 10, i32 0, [8 x i8] zeroinitializer }] 27 /* linked lists of container objects */ 28 struct gc_generation generations[3] = { 29 /* PyGC_Head, threshold, count */ 30 {{{GEN_HEAD(0), GEN_HEAD(0), 0}}, 700, 0}, 31 {{{GEN_HEAD(1), GEN_HEAD(1), 0}}, 10, 0}, 32 {{{GEN_HEAD(2), GEN_HEAD(2), 0}}, 10, 0}, 33 }; 34