clang/test/AST/ast-dump-fpfeatures.cpp

   1 // Test without serialization:
   2 // RUN: %clang_cc1 -fsyntax-only -triple x86_64-pc-linux -std=c++11 -ast-dump %s \
   3 // RUN: | FileCheck --strict-whitespace %s
   4
   5 // Test with serialization:
   6 // RUN: %clang_cc1 -triple x86_64-pc-linux -emit-pch -o %t %s
   7 // RUN: %clang_cc1 -x c++ -triple x86_64-pc-linux -include-pch %t -ast-dump-all /dev/null \
   8 // RUN: | sed -e "s/ <undeserialized declarations>//" -e "s/ imported//" \
   9 // RUN: | FileCheck --strict-whitespace %s
  10
  11 float func_01(float x);
  12
  13 template <typename T>
  14 T func_02(T x) {
  15 #pragma STDC FP_CONTRACT ON
  16   return func_01(x);
  17 }
  18
  19 float func_03(float x) {
  20 #pragma STDC FP_CONTRACT OFF
  21   return func_02(x);
  22 }
  23
  24 // CHECK:      FunctionTemplateDecl {{.*}} func_02
  25 // CHECK:        FunctionDecl {{.*}} func_02 'float (float)'
  26 // CHECK-NEXT:     TemplateArgument type 'float'
  27 // CHECK-NEXT:       BuiltinType {{.*}} 'float'
  28 // CHECK-NEXT:     ParmVarDecl {{.*}} x 'float'
  29 // CHECK-NEXT:     CompoundStmt
  30 // CHECK-NEXT:       ReturnStmt
  31 // CHECK-NEXT:         CallExpr {{.*}} FPContractMode=1
  32
  33 // CHECK:      FunctionDecl {{.*}} func_03 'float (float)'
  34 // CHECK-NEXT:   ParmVarDecl {{.*}} x 'float'
  35 // CHECK-NEXT:     CompoundStmt
  36 // CHECK-NEXT:       ReturnStmt
  37 // CHECK-NEXT:         CallExpr {{.*}} FPContractMode=0
  38
  39 int func_04(float x) {
  40 #pragma STDC FP_CONTRACT ON
  41   return x;
  42 }
  43
  44 // CHECK:      FunctionDecl {{.*}} func_04 'int (float)'
  45 // CHECK-NEXT:   ParmVarDecl {{.*}} x 'float'
  46 // CHECK-NEXT:   CompoundStmt
  47 // CHECK-NEXT:     ReturnStmt
  48 // CHECK-NEXT:       ImplicitCastExpr {{.*}} 'int' <FloatingToIntegral> FPContractMode=1
  49
  50 float func_05(double x) {
  51 #pragma STDC FP_CONTRACT ON
  52   return (float)x;
  53 }
  54
  55 // CHECK:      FunctionDecl {{.*}} func_05 'float (double)'
  56 // CHECK-NEXT:   ParmVarDecl {{.*}} x 'double'
  57 // CHECK-NEXT:   CompoundStmt
  58 // CHECK-NEXT:     ReturnStmt
  59 // CHECK-NEXT:       CStyleCastExpr {{.*}} FPContractMode=1
  60
  61 float func_06(double x) {
  62 #pragma STDC FP_CONTRACT ON
  63   return float(x);
  64 }
  65
  66 // CHECK:      FunctionDecl {{.*}} func_06 'float (double)'
  67 // CHECK-NEXT:   ParmVarDecl {{.*}} x 'double'
  68 // CHECK-NEXT:   CompoundStmt
  69 // CHECK-NEXT:     ReturnStmt
  70 // CHECK-NEXT:       CXXFunctionalCastExpr {{.*}} FPContractMode=1
  71
  72 float func_07(double x) {
  73 #pragma STDC FP_CONTRACT ON
  74   return static_cast<float>(x);
  75 }
  76
  77 // CHECK:      FunctionDecl {{.*}} func_07 'float (double)'
  78 // CHECK-NEXT:   ParmVarDecl {{.*}} x 'double'
  79 // CHECK-NEXT:   CompoundStmt
  80 // CHECK-NEXT:     ReturnStmt
  81 // CHECK-NEXT:       CXXStaticCastExpr {{.*}} FPContractMode=1
  82
  83 #pragma STDC FENV_ROUND FE_DOWNWARD
  84
  85 float func_10(float x, float y) {
  86   return x + y;
  87 }
  88
  89 // CHECK-LABEL: FunctionDecl {{.*}} func_10 'float (float, float)'
  90 // CHECK:         BinaryOperator {{.*}} 'float' '+' ConstRoundingMode=downward
  91
  92 float func_11(float x, float y) {
  93   if (x < 0) {
  94     #pragma STDC FENV_ROUND FE_UPWARD
  95     return x + y;
  96   }
  97   return x - y;
  98 }
  99
 100 // CHECK-LABEL: FunctionDecl {{.*}} func_11 'float (float, float)'
 101 // CHECK:         BinaryOperator {{.*}} 'float' '+' ConstRoundingMode=upward
 102 // CHECK:         BinaryOperator {{.*}} 'float' '-' ConstRoundingMode=downward
 103
 104
 105 #pragma STDC FENV_ROUND FE_DYNAMIC
 106
 107 float func_12(float x, float y) {
 108   return x + y;
 109 }
 110
 111 // CHECK-LABEL: FunctionDecl {{.*}} func_12 'float (float, float)'
 112 // CHECK:         BinaryOperator {{.*}} 'float' '+' ConstRoundingMode=dynamic
 113
 114 #pragma STDC FENV_ROUND FE_TONEAREST
 115
 116 float func_13(float x, float y) {
 117   return x + y;
 118 }
 119
 120 // CHECK-LABEL: FunctionDecl {{.*}} func_13 'float (float, float)'
 121 // CHECK:         BinaryOperator {{.*}} 'float' '+' ConstRoundingMode=tonearest
 122
 123
 124 template <typename T>
 125 T func_14(T x, T y) {
 126 #pragma STDC FENV_ROUND FE_TOWARDZERO
 127   return x + y;
 128 }
 129
 130 float func_15(float x, float y) {
 131 #pragma STDC FENV_ROUND FE_DOWNWARD
 132   return func_14(x, y);
 133 }
 134
 135 // CHECK-LABEL: FunctionTemplateDecl {{.*}} func_14
 136 // CHECK:         FunctionDecl {{.*}} func_14 'T (T, T)'
 137 // CHECK:           CompoundStmt
 138 // CHECK-NEXT:        ReturnStmt
 139 // CHECK-NEXT:          BinaryOperator {{.*}} '+' ConstRoundingMode=towardzero
 140 // CHECK:         FunctionDecl {{.*}} func_14 'float (float, float)'
 141 // CHECK:           CompoundStmt
 142 // CHECK-NEXT:        ReturnStmt
 143 // CHECK-NEXT:          BinaryOperator {{.*}} 'float' '+' ConstRoundingMode=towardzero
 144
 145 float func_16(float x, float y) {
 146 #pragma STDC FENV_ROUND FE_TOWARDZERO
 147   if (x < 0) {
 148 #pragma STDC FENV_ROUND FE_UPWARD
 149     return x - y;
 150   }
 151   return x + y;
 152 }
 153
 154 // CHECK-LABEL: FunctionDecl {{.*}} func_16 'float (float, float)'
 155 // CHECK:         CompoundStmt {{.*}} ConstRoundingMode=towardzero
 156 // CHECK:           IfStmt
 157 // CHECK:             CompoundStmt {{.*}} ConstRoundingMode=upward
 158 // CHECK:               ReturnStmt
 159 // CHECK:                 BinaryOperator {{.*}} ConstRoundingMode=upward
 160 // CHECK:           ReturnStmt
 161 // CHECK:             BinaryOperator {{.*}} ConstRoundingMode=towardzero
 162
 163 float func_17(float x, float y) {
 164 #pragma STDC FENV_ROUND FE_TOWARDZERO
 165   if (x < 0) {
 166 #pragma STDC FENV_ROUND FE_TOWARDZERO
 167     return x - y;
 168   }
 169   return x + y;
 170 }
 171
 172 // CHECK-LABEL: FunctionDecl {{.*}} func_17 'float (float, float)'
 173 // CHECK:         CompoundStmt {{.*}} ConstRoundingMode=towardzero
 174 // CHECK:           IfStmt
 175 // CHECK:             CompoundStmt {{.*}}
 176 // CHECK:               ReturnStmt
 177 // CHECK:                 BinaryOperator {{.*}} ConstRoundingMode=towardzero
 178 // CHECK:           ReturnStmt
 179 // CHECK:             BinaryOperator {{.*}} ConstRoundingMode=towardzero
 180
 181 #pragma STDC FENV_ROUND FE_DOWNWARD
 182 float func_18(float x, float y) {
 183   return x + y;
 184 }
 185
 186 // CHECK-LABEL: FunctionDecl {{.*}} func_18 'float (float, float)'
 187 // CHECK:         CompoundStmt {{.*}} ConstRoundingMode=downward
 188 // CHECK:           ReturnStmt
 189 // CHECK:             BinaryOperator {{.*}} ConstRoundingMode=downward