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