clang/test/CodeGen/decl.c

   1 // RUN: %clang_cc1 -std=c89 -w -fmerge-all-constants -emit-llvm < %s | FileCheck %s
   2
   3 // CHECK: @test1.x = internal constant [12 x i32] [i32 1
   4 // CHECK: @__const.test2.x = private unnamed_addr constant [13 x i32] [i32 1,
   5 // CHECK: @test5w = {{(dso_local )?}}global { i32, [4 x i8] } { i32 2, [4 x i8] undef }
   6 // CHECK: @test5y = {{(dso_local )?}}global { double } { double 7.300000e+0{{[0]*}}1 }
   7
   8 // CHECK: @__const.test6.x = private unnamed_addr constant %struct.SelectDest { i8 1, i8 2, i32 3, i32 0 }
   9
  10 // CHECK: @test7 = {{(dso_local )?}}global [2 x %struct.test7s] [%struct.test7s { i32 1, i32 2 }, %struct.test7s { i32 4, i32 0 }]
  11
  12 void test1(void) {
  13   // This should codegen as a "@test1.x" global.
  14   const int x[] = { 1, 2, 3, 4, 6, 8, 9, 10, 123, 231, 123,23 };
  15   foo(x);
  16
  17 // CHECK: @test1()
  18 // CHECK: {{call.*@foo.*@test1.x}}
  19 }
  20
  21
  22 // rdar://7346691
  23 void test2(void) {
  24   // This should codegen as a "@test2.x" global + memcpy.
  25   int x[] = { 1, 2, 3, 4, 6, 8, 9, 10, 123, 231, 123,23, 24 };
  26   foo(x);
  27
  28   // CHECK: @test2()
  29   // CHECK: %x = alloca [13 x i32]
  30   // CHECK: call void @llvm.memcpy
  31   // CHECK: call{{.*}}@foo{{.*}}ptr noundef %
  32 }
  33
  34
  35 void test3(void) {
  36   // This should codegen as a memset.
  37   int x[100] = { 0 };
  38   foo(x);
  39
  40   // CHECK: @test3()
  41   // CHECK: %x = alloca [100 x i32]
  42   // CHECK: call void @llvm.memset
  43 }
  44
  45 void test4(void) {
  46   char a[10] = "asdf";
  47   char b[10] = { "asdf" };
  48   // CHECK: @test4()
  49   // CHECK: %a = alloca [10 x i8]
  50   // CHECK: %b = alloca [10 x i8]
  51   // CHECK: call void @llvm.memcpy
  52   // CHECK: call void @llvm.memcpy
  53 }
  54
  55
  56 union test5u { int i; double d; };
  57
  58 void test5(void) {
  59   union test5u ola = (union test5u) 351;
  60   union test5u olb = (union test5u) 1.0;
  61 }
  62
  63 union test5u test5w = (union test5u)2;
  64 union test5u test5y = (union test5u)73.0;
  65
  66
  67
  68 // PR6660 - sqlite miscompile
  69 struct SelectDest {
  70   unsigned char eDest;
  71   unsigned char affinity;
  72   int iParm;
  73   int iMem;
  74 };
  75
  76 void test6(void) {
  77   struct SelectDest x = {1, 2, 3};
  78   test6f(&x);
  79 }
  80
  81 // rdar://7657600
  82 struct test7s { int a; int b; } test7[] = {
  83   {1, 2},
  84   {4},
  85 };
  86
  87 // rdar://7872531
  88 #pragma pack(push, 2)
  89 struct test8s { int f0; char f1; } test8g = {};
  90
  91
  92 // PR7519
  93
  94 struct S {
  95   void (*x) (struct S *);
  96 };
  97
  98 extern struct S *global_dc;
  99 void cp_diagnostic_starter(struct S *);
 100
 101 void init_error(void) {
 102   global_dc->x = cp_diagnostic_starter;
 103 }
 104
 105
 106
 107 // rdar://8147692 - ABI crash in recursive struct-through-function-pointer.
 108 typedef struct {
 109   int x5a;
 110 } x5;
 111
 112 typedef struct x2 *x0;
 113 typedef long (*x1)(x0 x0a, x5 x6);
 114 struct x2 {
 115   x1 x4;
 116 };
 117 long x3(x0 x0a, x5 a) {
 118   return x0a->x4(x0a, a);
 119 }