Testcases for 54503. One derived from PR 2533, the

other from Python.

llvm-svn: 54505

llvm/test/FrontendC/2008-08-07-AlignPadding1.c

@@ -0,0 +1,29 @@
+/* RUN: %llvmgcc %s -m64 -S -o - -emit-llvm -O0 | grep zeroinitializer | count 6
+
+The FE must generate padding here both at the end of each PyG_Head and
+between array elements.  Reduced from Python. */
+
+typedef union _gc_head {
+  struct {
+    union _gc_head *gc_next;
+    union _gc_head *gc_prev;
+    long gc_refs;
+  } gc;
+  int dummy __attribute__((aligned(16)));
+} PyGC_Head;
+
+struct gc_generation {
+  PyGC_Head head;
+  int threshold;
+  int count;
+};
+
+#define GEN_HEAD(n) (&generations[n].head)
+
+/* linked lists of container objects */
+static struct gc_generation generations[3] = {
+        /* PyGC_Head,                           threshold,      count */
+        {{{GEN_HEAD(0), GEN_HEAD(0), 0}},       700,            0},
+        {{{GEN_HEAD(1), GEN_HEAD(1), 0}},       10,             0},
+        {{{GEN_HEAD(2), GEN_HEAD(2), 0}},       10,             0},
+};

llvm/test/FrontendC/2008-08-07-AlignPadding2.c

@@ -0,0 +1,18 @@
+/* RUN: %llvmgcc %s -m64 -S -o - -emit-llvm -O0 | grep zeroinitializer | count 1
+
+The FE must not generate padding here between array elements.  PR 2533. */
+
+typedef struct {
+ const char *name;
+ int flags;
+ union {
+   int x;
+ } u;
+} OptionDef;
+
+const OptionDef options[] = {
+ /* main options */
+ { "a", 0, {3} },
+ { "b", 0, {4} },
+ { 0, },
+};