clang/test/CodeGen/auto.c

   1 // RUN: %clang_cc1 -std=c2x -emit-llvm %s -o - | FileCheck %s
   2
   3 void basic_types(void) {
   4   auto nb = 4;          // CHECK: alloca i32
   5   auto dbl = 4.3;       // CHECK: alloca double
   6   auto lng = 4UL;       // CHECK: alloca i{{32|64}}
   7   auto bl = true;       // CHECK: alloca i8
   8   auto chr = 'A';       // CHECK: alloca i{{8|32}}
   9   auto str = "Test";    // CHECK: alloca ptr
  10   auto str2[] = "Test"; // CHECK: alloca [5 x i8]
  11   auto nptr = nullptr;  // CHECK: alloca ptr
  12 }
  13
  14 void misc_declarations(void) {
  15   // FIXME: this should end up being rejected when we implement underspecified
  16   // declarations in N3006.
  17   auto strct_ptr = (struct { int a; } *)0;  // CHECK: alloca ptr
  18   auto int_cl = (int){13};                  // CHECK: alloca i32
  19   auto double_cl = (double){2.5};           // CHECK: alloca double
  20
  21   auto se = ({      // CHECK: alloca i32
  22     auto snb = 12;  // CHECK: alloca i32
  23     snb;
  24   });
  25 }
  26
  27 void loop(void) {
  28   auto j = 4;                       // CHECK: alloca i32
  29   for (auto i = j; i < 2 * j; i++); // CHECK: alloca i32
  30 }
  31
  32 #define AUTO_MACRO(_NAME, ARG, ARG2, ARG3) auto _NAME = ARG + (ARG2 / ARG3);
  33
  34 #define AUTO_INT_MACRO(_NAME, ARG, ARG2, ARG3) auto _NAME = (ARG ^ ARG2) & ARG3;
  35
  36 int macros(int in_int) {
  37   auto a = in_int + 1;             // CHECK: alloca i32
  38   AUTO_MACRO(b, 1.3, 2.5f, 3);     // CHECK: alloca double
  39   AUTO_INT_MACRO(c, 64, 23, 0xff); // CHECK: alloca i32
  40   return (a + (int)b) - c;         // CHECK: ret i32 %{{.*}}
  41 }