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      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 // CHECK: @a = global [5 x i8] c"asdf\00"
      8 
      9 char a2[2][5] = { "asdf" };
     10 // CHECK: @a2 = global [2 x [5 x i8]] {{\[}}[5 x i8] c"asdf\00", [5 x i8] zeroinitializer]
     11 
     12 // Double-implicit-conversions of array/functions (not legal C, but
     13 // clang accepts it for gcc compat).
     14 intptr_t b = a; // expected-warning {{incompatible pointer to integer conversion}}
     15 int c();
     16 void *d = c;
     17 intptr_t e = c; // expected-warning {{incompatible pointer to integer conversion}}
     18 
     19 int f, *g = __extension__ &f, *h = (1 != 1) ? &f : &f;
     20 
     21 union s2 {
     22   struct {
     23     struct { } *f0;
     24   } f0;
     25 };
     26 
     27 int g0 = (int)(&(((union s2 *) 0)->f0.f0) - 0);
     28 
     29 // CHECK: @g1x = global { double, double } { double 1.000000e+00{{[0]*}}, double 0.000000e+00{{[0]*}} }
     30 _Complex double g1x = 1.0f;
     31 // CHECK: @g1y = global { double, double } { double 0.000000e+00{{[0]*}}, double 1.000000e+00{{[0]*}} }
     32 _Complex double g1y = 1.0fi;
     33 // CHECK: @g1 = global { i8, i8 } { i8 1, i8 10 }
     34 _Complex char g1 = (char) 1 + (char) 10 * 1i;
     35 // CHECK: @g2 = global { i32, i32 } { i32 1, i32 10 }
     36 _Complex int g2 = 1 + 10i;
     37 // CHECK: @g3 = global { float, float } { float 1.000000e+00{{[0]*}}, float 1.000000e+0{{[0]*}}1 }
     38 _Complex float g3 = 1.0 + 10.0i;
     39 // CHECK: @g4 = global { double, double } { double 1.000000e+00{{[0]*}}, double 1.000000e+0{{[0]*}}1 }
     40 _Complex double g4 = 1.0 + 10.0i;
     41 // CHECK: @g5 = global { i32, i32 } zeroinitializer
     42 _Complex int g5 = (2 + 3i) == (5 + 7i);
     43 // CHECK: @g6 = global { double, double } { double -1.100000e+0{{[0]*}}1, double 2.900000e+0{{[0]*}}1 }
     44 _Complex double g6 = (2.0 + 3.0i) * (5.0 + 7.0i);
     45 // CHECK: @g7 = global i32 1
     46 int g7 = (2 + 3i) * (5 + 7i) == (-11 + 29i);
     47 // CHECK: @g8 = global i32 1
     48 int g8 = (2.0 + 3.0i) * (5.0 + 7.0i) == (-11.0 + 29.0i);
     49 // CHECK: @g9 = global i32 0
     50 int g9 = (2 + 3i) * (5 + 7i) != (-11 + 29i);
     51 // CHECK: @g10 = global i32 0
     52 int g10 = (2.0 + 3.0i) * (5.0 + 7.0i) != (-11.0 + 29.0i);
     53 
     54 // PR5108
     55 // CHECK: @gv1 = global %struct.anon <{ i32 0, i8 7 }>, align 1
     56 struct {
     57   unsigned long a;
     58   unsigned long b:3;
     59 } __attribute__((__packed__)) gv1  = { .a = 0x0, .b = 7,  };
     60 
     61 // PR5118
     62 // CHECK: @gv2 = global %struct.anon.0 <{ i8 1, i8* null }>, align 1
     63 struct {
     64   unsigned char a;
     65   char *b;
     66 } __attribute__((__packed__)) gv2 = { 1, (void*)0 };
     67 
     68 // Global references
     69 // CHECK: @g11.l0 = internal global i32 ptrtoint (i32 ()* @g11 to i32)
     70 long g11() {
     71   static long l0 = (long) g11;
     72   return l0;
     73 }
     74 
     75 // CHECK: @g12 = global i32 ptrtoint (i8* @g12_tmp to i32)
     76 static char g12_tmp;
     77 long g12 = (long) &g12_tmp;
     78 
     79 // CHECK: @g13 = global [1 x %struct.g13_s0] [%struct.g13_s0 { i32 ptrtoint (i8* @g12_tmp to i32) }]
     80 struct g13_s0 {
     81    long a;
     82 };
     83 struct g13_s0 g13[] = {
     84    { (long) &g12_tmp }
     85 };
     86 
     87 // CHECK: @g14 = global i8* inttoptr (i64 100 to i8*)
     88 void *g14 = (void*) 100;
     89 
     90 // CHECK: @g15 = global i32 -1
     91 int g15 = (int) (char) ((void*) 0 + 255);
     92 
     93 // CHECK: @g16 = global i64 4294967295
     94 long long g16 = (long long) ((void*) 0xFFFFFFFF);
     95 
     96 // CHECK: @g17 = global i32* @g15
     97 int *g17 = (int *) ((long) &g15);
     98 
     99 // CHECK: @g18.p = internal global [1 x i32*] [i32* @g19]
    100 void g18(void) {
    101   extern int g19;
    102   static int *p[] = { &g19 };
    103 }
    104 
    105 // CHECK: @g20.l0 = internal global %struct.g20_s1 { %struct.g20_s0* null, %struct.g20_s0** getelementptr inbounds (%struct.g20_s1, %struct.g20_s1* @g20.l0, i32 0, i32 0) }
    106 struct g20_s0;
    107 struct g20_s1 {
    108   struct g20_s0 *f0, **f1;
    109 };
    110 void *g20(void) {
    111   static struct g20_s1 l0 = { ((void*) 0), &l0.f0 };
    112   return l0.f1;
    113 }
    114 
    115 // PR4108
    116 struct g21 {int g21;};
    117 const struct g21 g21 = (struct g21){1};
    118 
    119 // PR5474
    120 struct g22 {int x;} __attribute((packed));
    121 struct g23 {char a; short b; char c; struct g22 d;};
    122 struct g23 g24 = {1,2,3,4};
    123 
    124 // CHECK: @g25.g26 = internal global i8* getelementptr inbounds ([4 x i8], [4 x i8]* @__func__.g25, i32 0, i32 0)
    125 // CHECK: @__func__.g25 = private unnamed_addr constant [4 x i8] c"g25\00"
    126 int g25() {
    127   static const char *g26 = __func__;
    128   return *g26;
    129 }
    130 
    131 // CHECK: @g27.x = internal global i8* bitcast (i8** @g27.x to i8*), align 4
    132 void g27() { // PR8073
    133   static void *x = &x;
    134 }
    135 
    136 void g28() {
    137   typedef long long v1i64 __attribute((vector_size(8)));
    138   typedef short v12i16 __attribute((vector_size(24)));
    139   typedef long double v2f80 __attribute((vector_size(24)));
    140   // CHECK: @g28.a = internal global <1 x i64> <i64 10>
    141   // CHECK: @g28.b = internal global <12 x i16> <i16 0, i16 0, i16 0, i16 -32768, i16 16383, i16 0, i16 0, i16 0, i16 0, i16 -32768, i16 16384, i16 0>
    142   // CHECK: @g28.c = internal global <2 x x86_fp80> <x86_fp80 0xK3FFF8000000000000000, x86_fp80 0xK40008000000000000000>, align 32
    143   static v1i64 a = (v1i64)10LL;
    144   static v12i16 b = (v2f80){1,2};
    145   static v2f80 c = (v12i16){0,0,0,-32768,16383,0,0,0,0,-32768,16384,0};
    146 }
    147 
    148 // PR13643
    149 void g29() {
    150   typedef char DCC_PASSWD[2];
    151   typedef struct
    152   {
    153       DCC_PASSWD passwd;
    154   } DCC_SRVR_NM;
    155   // CHECK: @g29.a = internal global %struct.DCC_SRVR_NM { [2 x i8] c"@\00" }, align 1
    156   // CHECK: @g29.b = internal global [1 x i32] [i32 ptrtoint ([5 x i8]* @.str to i32)], align 4
    157   // CHECK: @g29.c = internal global [1 x i32] [i32 97], align 4
    158   static DCC_SRVR_NM a = { {"@"} };
    159   static int b[1] = { "asdf" }; // expected-warning {{incompatible pointer to integer conversion initializing 'int' with an expression of type 'char [5]'}}
    160   static int c[1] = { L"a" };
    161 }
    162 
    163 // PR21300
    164 void g30() {
    165 #pragma pack(1)
    166   static struct {
    167     int : 1;
    168     int x;
    169   } a = {};
    170   // CHECK: @g30.a = internal global %struct.anon.1 <{ i8 undef, i32 0 }>, align 1
    171 #pragma pack()
    172 }
    173 
    174 void g31() {
    175 #pragma pack(4)
    176   static struct {
    177     short a;
    178     long x;
    179     short z;
    180   } a = {23122, -12312731, -312};
    181 #pragma pack()
    182   // CHECK: @g31.a = internal global %struct.anon.2 { i16 23122, i32 -12312731, i16 -312 }, align 4
    183 }
    184