clang/test/CodeGen/2008-03-24-BitField-And-Alloca.c

   1 // RUN: %clang_cc1 -O2 -emit-llvm %s -o - | not grep alloca
   2 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -O2 -emit-llvm %s -o - | not grep store
   3
   4 enum {
   5  PP_C,
   6  PP_D,
   7  PP_R,
   8  PP_2D,
   9  PP_1D,
  10  PP_SR,
  11  PP_S2D,
  12  PP_S1D,
  13  PP_SC
  14 };
  15
  16 enum {
  17  G_VP,
  18  G_FP,
  19  G_VS,
  20  G_GS,
  21  G_FS
  22 };
  23
  24 enum {
  25  G_NONE,
  26  G_B,
  27  G_R
  28 };
  29
  30 typedef union _Key {
  31  struct {
  32   unsigned int count : 2;
  33   unsigned int Aconst : 1;
  34   unsigned int Bconst : 1;
  35   unsigned int Cconst : 1;
  36   unsigned int Xused : 1;
  37   unsigned int Yused : 1;
  38   unsigned int Zused : 1;
  39   unsigned int Wused : 1;
  40   unsigned int ttype : 3;
  41   unsigned int scalar : 1;
  42   unsigned int AType : 4;
  43   unsigned int BType : 4;
  44   unsigned int CType : 4;
  45   unsigned int RType : 4;
  46   unsigned int Size : 2;
  47   unsigned int prec : 1;
  48
  49   unsigned int ASize : 2;
  50   unsigned int BSize : 2;
  51   unsigned int CSize : 2;
  52   unsigned int tTex : 4;
  53   unsigned int proj : 1;
  54   unsigned int lod : 2;
  55   unsigned int dvts : 1;
  56   unsigned int uipad : 18;
  57  } key_io;
  58  struct {
  59   unsigned int key0;
  60   unsigned int key1;
  61  } key;
  62  unsigned long long lkey;
  63 } Key;
  64
  65 static void foo(const Key iospec, int* ret)
  66 {
  67   *ret=0;
  68  if(((iospec.key_io.lod == G_B) &&
  69   (iospec.key_io.ttype != G_VS) &&
  70   (iospec.key_io.ttype != G_GS) &&
  71   (iospec.key_io.ttype != G_FS)) ||
  72
  73   (((iospec.key_io.tTex == PP_C) ||
  74     (iospec.key_io.tTex == PP_SC)) &&
  75    ((iospec.key_io.tTex == PP_SR) ||
  76     (iospec.key_io.tTex == PP_S2D) ||
  77     (iospec.key_io.tTex == PP_S1D) ||
  78     (iospec.key_io.tTex == PP_SC))))
  79   *ret=1;
  80 }
  81
  82
  83 extern int bar(unsigned long long key_token2)
  84 {
  85  int ret;
  86  __attribute__ ((unused)) Key iospec = (Key) key_token2;
  87  foo(iospec, &ret);
  88  return ret;
  89 }