test/CodeGen/const-init.c

   1 // RUN: %clang_cc1 -triple i386-pc-linux-gnu -ffreestanding -verify -emit-llvm -o - %s | FileCheck %s
   2
   3 #include <stdint.h>
   4
   5 // Brace-enclosed string array initializers
   6 char a[] = { "asdf" };
   7
   8 // Double-implicit-conversions of array/functions (not legal C, but
   9 // clang accepts it for gcc compat).
  10 intptr_t b = a; // expected-warning {{incompatible pointer to integer conversion}}
  11 int c();
  12 void *d = c;
  13 intptr_t e = c; // expected-warning {{incompatible pointer to integer conversion}}
  14
  15 int f, *g = __extension__ &f, *h = (1 != 1) ? &f : &f;
  16
  17 union s2 {
  18   struct {
  19     struct { } *f0;
  20   } f0;
  21 };
  22
  23 int g0 = (int)(&(((union s2 *) 0)->f0.f0) - 0);
  24
  25 // CHECK: @g1x = global {{%.}} { double 1.000000e+00{{[0]*}}, double 0.000000e+00{{[0]*}} }
  26 _Complex double g1x = 1.0f;
  27 // CHECK: @g1y = global {{%.}} { double 0.000000e+00{{[0]*}}, double 1.000000e+00{{[0]*}} }
  28 _Complex double g1y = 1.0fi;
  29 // CHECK: @g1 = global {{%.}} { i8 1, i8 10 }
  30 _Complex char g1 = (char) 1 + (char) 10 * 1i;
  31 // CHECK: @g2 = global %2 { i32 1, i32 10 }
  32 _Complex int g2 = 1 + 10i;
  33 // CHECK: @g3 = global {{%.}} { float 1.000000e+00{{[0]*}}, float 1.000000e+0{{[0]*}}1 }
  34 _Complex float g3 = 1.0 + 10.0i;
  35 // CHECK: @g4 = global {{%.}} { double 1.000000e+00{{[0]*}}, double 1.000000e+0{{[0]*}}1 }
  36 _Complex double g4 = 1.0 + 10.0i;
  37 // CHECK: @g5 = global %2 zeroinitializer
  38 _Complex int g5 = (2 + 3i) == (5 + 7i);
  39 // CHECK: @g6 = global {{%.}} { double -1.100000e+0{{[0]*}}1, double 2.900000e+0{{[0]*}}1 }
  40 _Complex double g6 = (2.0 + 3.0i) * (5.0 + 7.0i);
  41 // CHECK: @g7 = global i32 1
  42 int g7 = (2 + 3i) * (5 + 7i) == (-11 + 29i);
  43 // CHECK: @g8 = global i32 1
  44 int g8 = (2.0 + 3.0i) * (5.0 + 7.0i) == (-11.0 + 29.0i);
  45 // CHECK: @g9 = global i32 0
  46 int g9 = (2 + 3i) * (5 + 7i) != (-11 + 29i);
  47 // CHECK: @g10 = global i32 0
  48 int g10 = (2.0 + 3.0i) * (5.0 + 7.0i) != (-11.0 + 29.0i);
  49
  50 // PR5108
  51 // CHECK: @gv1 = global %4 <{ i32 0, i8 7 }>, align 1
  52 struct {
  53   unsigned long a;
  54   unsigned long b:3;
  55 } __attribute__((__packed__)) gv1  = { .a = 0x0, .b = 7,  };
  56
  57 // PR5118
  58 // CHECK: @gv2 = global %5 <{ i8 1, i8* null }>, align 1
  59 struct {
  60   unsigned char a;
  61   char *b;
  62 } __attribute__((__packed__)) gv2 = { 1, (void*)0 };
  63
  64 // Global references
  65 // CHECK: @g11.l0 = internal global i32 ptrtoint (i32 ()* @g11 to i32)
  66 long g11() {
  67   static long l0 = (long) g11;
  68   return l0;
  69 }
  70
  71 // CHECK: @g12 = global i32 ptrtoint (i8* @g12_tmp to i32)
  72 static char g12_tmp;
  73 long g12 = (long) &g12_tmp;
  74
  75 // CHECK: @g13 = global [1 x %struct.g13_s0] [%struct.g13_s0 { i32 ptrtoint (i8* @g12_tmp to i32) }]
  76 struct g13_s0 {
  77    long a;
  78 };
  79 struct g13_s0 g13[] = {
  80    { (long) &g12_tmp }
  81 };
  82
  83 // CHECK: @g14 = global i8* inttoptr (i64 100 to i8*)
  84 void *g14 = (void*) 100;
  85
  86 // CHECK: @g15 = global i32 -1
  87 int g15 = (int) (char) ((void*) 0 + 255);
  88
  89 // CHECK: @g16 = global i64 4294967295
  90 long long g16 = (long long) ((void*) 0xFFFFFFFF);
  91
  92 // CHECK: @g17 = global i32* @g15
  93 int *g17 = (int *) ((long) &g15);
  94
  95 // CHECK: @g18.p = internal global [1 x i32*] [i32* @g19]
  96 void g18(void) {
  97   extern int g19;
  98   static int *p[] = { &g19 };
  99 }
 100
 101 // CHECK: @g20.l0 = internal global %struct.g20_s1 { %struct.g20_s0* null, %struct.g20_s0** getelementptr inbounds (%struct.g20_s1* @g20.l0, i32 0, i32 0) }
 102 struct g20_s0;
 103 struct g20_s1 {
 104   struct g20_s0 *f0, **f1;
 105 };
 106 void *g20(void) {
 107   static struct g20_s1 l0 = { ((void*) 0), &l0.f0 };
 108   return l0.f1;
 109 }
 110
 111 // PR4108
 112 struct g21 {int g21;};
 113 const struct g21 g21 = (struct g21){1};
 114
 115 // PR5474
 116 struct g22 {int x;} __attribute((packed));
 117 struct g23 {char a; short b; char c; struct g22 d;};
 118 struct g23 g24 = {1,2,3,4};
 119
 120 // CHECK: @g25.g26 = internal global i8* getelementptr inbounds ([4 x i8]* @__func__.g25, i32 0, i32 0)
 121 // CHECK: @__func__.g25 = private unnamed_addr constant [4 x i8] c"g25\00"
 122 int g25() {
 123   static const char *g26 = __func__;
 124   return *g26;
 125 }
 126
 127 // CHECK: @g27.x = internal global i8* bitcast (i8** @g27.x to i8*), align 4
 128 void g27() { // PR8073
 129   static void *x = &x;
 130 }