clang/test/CodeGenCXX/float16-declarations.cpp

   1 // RUN: %clang -std=c++11 --target=aarch64-none-elf -S -emit-llvm %s -o - | FileCheck %s  --check-prefix=CHECK --check-prefix=CHECK-AARCH64
   2
   3 /*  Various contexts where type _Float16 can appear. */
   4
   5
   6 /*  Namespace */
   7
   8 namespace {
   9   _Float16 f1n;
  10 // CHECK-DAG: @_ZN12_GLOBAL__N_13f1nE = internal global half 0xH0000, align 2
  11
  12   _Float16 f2n = 33.f16;
  13 // CHECK-DAG: @_ZN12_GLOBAL__N_13f2nE = internal global half 0xH5020, align 2
  14
  15   _Float16 arr1n[10];
  16 // CHECK-AARCH64-DAG: @_ZN12_GLOBAL__N_15arr1nE = internal global [10 x half] zeroinitializer, align 2
  17
  18   _Float16 arr2n[] = { 1.2, 3.0, 3.e4 };
  19 // CHECK-DAG: @_ZN12_GLOBAL__N_15arr2nE = internal global [3 x half] [half 0xH3CCD, half 0xH4200, half 0xH7753], align 2
  20
  21   const volatile _Float16 func1n(const _Float16 &arg) {
  22     return arg + f2n + arr1n[4] - arr2n[1];
  23   }
  24 }
  25
  26
  27 /* File */
  28
  29 _Float16 f1f;
  30 // CHECK-AARCH64-DAG: @f1f = dso_local global half 0xH0000, align 2
  31
  32 _Float16 f2f = 32.4;
  33 // CHECK-DAG: @f2f = dso_local global half 0xH500D, align 2
  34
  35 _Float16 arr1f[10];
  36 // CHECK-AARCH64-DAG: @arr1f = dso_local global [10 x half] zeroinitializer, align 2
  37
  38 _Float16 arr2f[] = { -1.2, -3.0, -3.e4 };
  39 // CHECK-DAG: @arr2f = dso_local global [3 x half] [half 0xHBCCD, half 0xHC200, half 0xHF753], align 2
  40
  41 _Float16 func1f(_Float16 arg);
  42
  43
  44 /* Class */
  45
  46 class C1 {
  47   _Float16 f1c;
  48
  49   static const _Float16 f2c;
  50 // CHECK-DAG: @_ZN2C13f2cE = external dso_local constant half, align 2
  51
  52   volatile _Float16 f3c;
  53
  54 public:
  55   C1(_Float16 arg) : f1c(arg), f3c(arg) { }
  56 // Check that we mangle _Float16 to DF16_
  57 // CHECK-DAG: define linkonce_odr dso_local void @_ZN2C1C2EDF16_(ptr{{.*}}, half{{.*}})
  58
  59   _Float16 func1c(_Float16 arg ) {
  60     return f1c + arg;
  61   }
  62 // CHECK-DAG: define linkonce_odr dso_local noundef half @_ZN2C16func1cEDF16_(ptr{{.*}}, half{{.*}})
  63
  64   static _Float16 func2c(_Float16 arg) {
  65     return arg * C1::f2c;
  66   }
  67 // CHECK-DAG: define linkonce_odr dso_local noundef half @_ZN2C16func2cEDF16_(half{{.*}})
  68 };
  69
  70 /*  Template */
  71
  72 template <class C> C func1t(C arg) {
  73   return arg * 2.f16;
  74 }
  75 // CHECK-DAG: define linkonce_odr dso_local noundef half @_Z6func1tIDF16_ET_S0_(half{{.*}})
  76
  77 template <class C> struct S1 {
  78   C mem1;
  79 };
  80
  81 template <> struct S1<_Float16> {
  82   _Float16 mem2;
  83 };
  84
  85
  86 /* Local */
  87
  88 extern int printf (const char *__restrict __format, ...);
  89
  90 int main(void) {
  91   _Float16 f1l = 1e3f16;
  92 // CHECK-DAG: store half 0xH63D0, ptr %{{.*}}, align 2
  93
  94   _Float16 f2l = -0.f16;
  95 // CHECK-DAG: store half 0xH8000, ptr %{{.*}}, align 2
  96
  97   _Float16 f3l = 1.000976562;
  98 // CHECK-DAG: store half 0xH3C01, ptr %{{.*}}, align 2
  99
 100   C1 c1(f1l);
 101 // CHECK-DAG:  [[F1L:%[a-z0-9]+]] = load half, ptr %{{.*}}, align 2
 102 // CHECK-DAG:  call void @_ZN2C1C2EDF16_(ptr {{[^,]*}} %{{.*}}, half noundef %{{.*}})
 103
 104   S1<_Float16> s1 = { 132.f16 };
 105 // CHECK-DAG: @__const.main.s1 = private unnamed_addr constant %struct.S1 { half 0xH5820 }, align 2
 106 // CHECK-DAG: call void @llvm.memcpy.p0.p0.i64(ptr align 2 %{{.*}}, ptr align 2 @__const.main.s1, i64 2, i1 false)
 107
 108   _Float16 f4l = func1n(f1l)  + func1f(f2l) + c1.func1c(f3l) + c1.func2c(f1l) +
 109     func1t(f1l) + s1.mem2 - f1n + f2n;
 110
 111   auto f5l = -1.f16, *f6l = &f2l, f7l = func1t(f3l);
 112 // CHECK-DAG:  store half 0xHBC00, ptr %{{.*}}, align 2
 113 // CHECK-DAG:  store ptr %{{.*}}, ptr %{{.*}}, align 8
 114
 115   _Float16 f8l = f4l++;
 116 // CHECK-DAG:  %{{.*}} = load half, ptr %{{.*}}, align 2
 117 // CHECK-DAG:  [[INC:%[a-z0-9]+]] = fadd half {{.*}}, 0xH3C00
 118 // CHECK-DAG:  store half [[INC]], ptr %{{.*}}, align 2
 119
 120   _Float16 arr1l[] = { -1.f16, -0.f16, -11.f16 };
 121 // CHECK-DAG: @__const.main.arr1l = private unnamed_addr constant [3 x half] [half 0xHBC00, half 0xH8000, half 0xHC980], align 2
 122
 123   float cvtf = f2n;
 124 //CHECK-DAG: [[H2F:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to float
 125 //CHECK-DAG:  store float [[H2F]], ptr %{{.*}}, align 4
 126
 127   double cvtd = f2n;
 128 //CHECK-DAG: [[H2D:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to double
 129 //CHECK-DAG: store double [[H2D]], ptr %{{.*}}, align 8
 130
 131
 132   long double cvtld = f2n;
 133 //CHECK-AARCh64-DAG: [[H2LD:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to fp128
 134 //CHECK-AARCh64-DAG: store fp128 [[H2LD]], ptr %{{.*}}, align 16
 135
 136   _Float16 f2h = 42.0f;
 137 //CHECK-DAG: store half 0xH5140, ptr %{{.*}}, align 2
 138   _Float16 d2h = 42.0;
 139 //CHECK-DAG: store half 0xH5140, ptr %{{.*}}, align 2
 140   _Float16 ld2h = 42.0l;
 141 //CHECK-DAG:store half 0xH5140, ptr %{{.*}}, align 2
 142 }