clang/test/CodeGen/2002-02-14-EntryNodePreds.c

   1 // RUN: %clang_cc1 -emit-llvm %s  -o /dev/null
   2
   3 /* GCC Used to generate code that contained a branch to the entry node of
   4  * the do_merge function.  This is illegal LLVM code.  To fix this, GCC now
   5  * inserts an entry node regardless of whether or not it has to insert allocas.
   6  */
   7
   8 struct edge_rec
   9 {
  10   struct VERTEX *v;
  11   struct edge_rec *next;
  12   int wasseen;
  13   int more_data;
  14 };
  15
  16 typedef struct edge_rec *QUAD_EDGE;
  17
  18 typedef struct {
  19   QUAD_EDGE left, right;
  20 } EDGE_PAIR;
  21
  22 struct EDGE_STACK {
  23     int ptr;
  24     QUAD_EDGE *elts;
  25     int stack_size;
  26 };
  27
  28 int do_merge(QUAD_EDGE ldo, QUAD_EDGE rdo) {
  29   int lvalid;
  30   QUAD_EDGE basel,rcand;
  31   while (1) {
  32     if (!lvalid) {
  33       return (int)basel->next;
  34     }
  35   }
  36 }
  37