[OpenMP][Bugfix] Move double and float versions of abs under c++ macro

Summary:
This is a fix for the reported bug:

[[ https://bugs.llvm.org/show_bug.cgi?id=41861 | 41861 ]]

abs functions need to be moved under the c++ macro to avoid conflicts with included headers.

Reviewers: tra, jdoerfert, hfinkel, ABataev, caomhin

Reviewed By: jdoerfert

Subscribers: guansong, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D61959

llvm-svn: 360809
diff --git a/clang/lib/Headers/__clang_cuda_cmath.h b/clang/lib/Headers/__clang_cuda_cmath.h
index 65caf02..c570451 100644
--- a/clang/lib/Headers/__clang_cuda_cmath.h
+++ b/clang/lib/Headers/__clang_cuda_cmath.h
@@ -48,9 +48,9 @@
 #if !(defined(_OPENMP) && defined(__cplusplus))
 __DEVICE__ long long abs(long long __n) { return ::llabs(__n); }
 __DEVICE__ long abs(long __n) { return ::labs(__n); }
-#endif
 __DEVICE__ float abs(float __x) { return ::fabsf(__x); }
 __DEVICE__ double abs(double __x) { return ::fabs(__x); }
+#endif
 __DEVICE__ float acos(float __x) { return ::acosf(__x); }
 __DEVICE__ float asin(float __x) { return ::asinf(__x); }
 __DEVICE__ float atan(float __x) { return ::atanf(__x); }
diff --git a/clang/lib/Headers/__clang_cuda_math_forward_declares.h b/clang/lib/Headers/__clang_cuda_math_forward_declares.h
index 1b6ec10..c94c3b7 100644
--- a/clang/lib/Headers/__clang_cuda_math_forward_declares.h
+++ b/clang/lib/Headers/__clang_cuda_math_forward_declares.h
@@ -39,10 +39,10 @@
 #if !(defined(_OPENMP) && defined(__cplusplus))
 __DEVICE__ long abs(long);
 __DEVICE__ long long abs(long long);
-#endif
-__DEVICE__ int abs(int) __NOEXCEPT;
 __DEVICE__ double abs(double);
 __DEVICE__ float abs(float);
+#endif
+__DEVICE__ int abs(int) __NOEXCEPT;
 __DEVICE__ double acos(double);
 __DEVICE__ float acos(float);
 __DEVICE__ double acosh(double);
diff --git a/clang/test/Headers/Inputs/include/cstdlib b/clang/test/Headers/Inputs/include/cstdlib
index f34673e..f038a6d 100644
--- a/clang/test/Headers/Inputs/include/cstdlib
+++ b/clang/test/Headers/Inputs/include/cstdlib
@@ -3,9 +3,11 @@
 #if __cplusplus >= 201703L
 extern int abs (int __x) throw()  __attribute__ ((__const__)) ;
 extern long int labs (long int __x) throw() __attribute__ ((__const__)) ;
+extern float fabs (float __x) throw() __attribute__ ((__const__)) ;
 #else
 extern int abs (int __x) __attribute__ ((__const__)) ;
 extern long int labs (long int __x) __attribute__ ((__const__)) ;
+extern float fabs (float __x) __attribute__ ((__const__)) ;
 #endif
 
 namespace std
diff --git a/clang/test/Headers/nvptx_device_cmath_functions.c b/clang/test/Headers/nvptx_device_cmath_functions.c
index 54e60a1..23265d0 100644
--- a/clang/test/Headers/nvptx_device_cmath_functions.c
+++ b/clang/test/Headers/nvptx_device_cmath_functions.c
@@ -17,5 +17,9 @@
     double l2 = pow(a1, a1);
     // CHECK-YES: call double @__nv_modf(double
     double l3 = modf(a1 + 3.5, &a1);
+    // CHECK-YES: call double @__nv_fabs(double
+    double l4 = fabs(a1);
+    // CHECK-YES: call i32 @__nv_abs(i32
+    double l5 = abs((int)a1);
   }
 }
diff --git a/clang/test/Headers/nvptx_device_cmath_functions.cpp b/clang/test/Headers/nvptx_device_cmath_functions.cpp
index 48795fe..0787b94 100644
--- a/clang/test/Headers/nvptx_device_cmath_functions.cpp
+++ b/clang/test/Headers/nvptx_device_cmath_functions.cpp
@@ -18,5 +18,9 @@
     double l2 = pow(a1, a1);
     // CHECK-YES: call double @__nv_modf(double
     double l3 = modf(a1 + 3.5, &a1);
+    // CHECK-YES: call double @__nv_fabs(double
+    double l4 = fabs(a1);
+    // CHECK-YES: call i32 @__nv_abs(i32
+    double l5 = abs((int)a1);
   }
 }
diff --git a/clang/test/Headers/nvptx_device_cmath_functions_cxx17.cpp b/clang/test/Headers/nvptx_device_cmath_functions_cxx17.cpp
index 89b997a..0b715fe 100644
--- a/clang/test/Headers/nvptx_device_cmath_functions_cxx17.cpp
+++ b/clang/test/Headers/nvptx_device_cmath_functions_cxx17.cpp
@@ -18,5 +18,9 @@
     double l2 = pow(a1, a1);
     // CHECK-YES: call double @__nv_modf(double
     double l3 = modf(a1 + 3.5, &a1);
+    // CHECK-YES: call double @__nv_fabs(double
+    double l4 = fabs(a1);
+    // CHECK-YES: call i32 @__nv_abs(i32
+    double l5 = abs((int)a1);
   }
 }
diff --git a/clang/test/Headers/nvptx_device_math_functions.c b/clang/test/Headers/nvptx_device_math_functions.c
index 22767d0..3cc1be5 100644
--- a/clang/test/Headers/nvptx_device_math_functions.c
+++ b/clang/test/Headers/nvptx_device_math_functions.c
@@ -17,5 +17,9 @@
     double l2 = pow(a1, a1);
     // CHECK-YES: call double @__nv_modf(double
     double l3 = modf(a1 + 3.5, &a1);
+    // CHECK-YES: call double @__nv_fabs(double
+    double l4 = fabs(a1);
+    // CHECK-YES: call i32 @__nv_abs(i32
+    double l5 = abs((int)a1);
   }
 }
diff --git a/clang/test/Headers/nvptx_device_math_functions.cpp b/clang/test/Headers/nvptx_device_math_functions.cpp
index a4f637b..e0f1826 100644
--- a/clang/test/Headers/nvptx_device_math_functions.cpp
+++ b/clang/test/Headers/nvptx_device_math_functions.cpp
@@ -18,5 +18,9 @@
     double l2 = pow(a1, a1);
     // CHECK-YES: call double @__nv_modf(double
     double l3 = modf(a1 + 3.5, &a1);
+    // CHECK-YES: call double @__nv_fabs(double
+    double l4 = fabs(a1);
+    // CHECK-YES: call i32 @__nv_abs(i32
+    double l5 = abs((int)a1);
   }
 }
diff --git a/clang/test/Headers/nvptx_device_math_functions_cxx17.cpp b/clang/test/Headers/nvptx_device_math_functions_cxx17.cpp
index f19d07a..e3c0b12 100644
--- a/clang/test/Headers/nvptx_device_math_functions_cxx17.cpp
+++ b/clang/test/Headers/nvptx_device_math_functions_cxx17.cpp
@@ -18,5 +18,9 @@
     double l2 = pow(a1, a1);
     // CHECK-YES: call double @__nv_modf(double
     double l3 = modf(a1 + 3.5, &a1);
+    // CHECK-YES: call double @__nv_fabs(double
+    double l4 = fabs(a1);
+    // CHECK-YES: call i32 @__nv_abs(i32
+    double l5 = abs((int)a1);
   }
 }