[libclc] Tighten OpenCL builtin include strategy

This commit continues the work from llvm#146840 and extends it to the
maths, geomtrics, common, and relational directories.

All headers have include guards and, where appropriate, include the
minimal code required for their specific definitions. Implementation
files no longer include the large catch-all header of all OpenCL builtin
declarations.

Author: frasercrmck

libclc/opencl/include/clc/opencl/common/degrees.h

@@ -6,9 +6,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_COMMON_DEGREES_H__
+#define __CLC_OPENCL_COMMON_DEGREES_H__
+
 #define FUNCTION degrees
 #define __CLC_BODY <clc/math/unary_decl.inc>
 
 #include <clc/math/gentype.inc>
 
 #undef FUNCTION
+
+#endif // __CLC_OPENCL_COMMON_DEGREES_H__

libclc/opencl/include/clc/opencl/common/mix.h

@@ -6,5 +6,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_COMMON_MIX_H__
+#define __CLC_OPENCL_COMMON_MIX_H__
+
 #define __CLC_BODY <clc/opencl/common/mix.inc>
 #include <clc/math/gentype.inc>
+
+#endif // __CLC_OPENCL_COMMON_MIX_H__

libclc/opencl/include/clc/opencl/common/radians.h

@@ -6,9 +6,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_COMMON_RADIANS_H__
+#define __CLC_OPENCL_COMMON_RADIANS_H__
+
 #define FUNCTION radians
 #define __CLC_BODY <clc/math/unary_decl.inc>
 
 #include <clc/math/gentype.inc>
 
 #undef FUNCTION
+
+#endif // __CLC_OPENCL_COMMON_RADIANS_H__

libclc/opencl/include/clc/opencl/common/sign.h

@@ -6,7 +6,12 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_COMMON_SIGN_H__
+#define __CLC_OPENCL_COMMON_SIGN_H__
+
 #define FUNCTION sign
 #define __CLC_BODY <clc/math/unary_decl.inc>
 #include <clc/math/gentype.inc>
 #undef FUNCTION
+
+#endif // __CLC_OPENCL_COMMON_SIGN_H__

libclc/opencl/include/clc/opencl/common/smoothstep.h

@@ -6,5 +6,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_COMMON_SMOOTHSTEP_H__
+#define __CLC_OPENCL_COMMON_SMOOTHSTEP_H__
+
 #define __CLC_BODY <clc/opencl/common/smoothstep.inc>
 #include <clc/math/gentype.inc>
+
+#endif // __CLC_OPENCL_COMMON_SMOOTHSTEP_H__

libclc/opencl/include/clc/opencl/common/step.h

@@ -6,5 +6,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_COMMON_STEP_H__
+#define __CLC_OPENCL_COMMON_STEP_H__
+
 #define __CLC_BODY <clc/opencl/common/step.inc>
 #include <clc/math/gentype.inc>
+
+#endif // __CLC_OPENCL_COMMON_STEP_H__

libclc/opencl/include/clc/opencl/geometric/cross.h

@@ -6,10 +6,15 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_GEOMETRIC_CROSS_H__
+#define __CLC_OPENCL_GEOMETRIC_CROSS_H__
+
 _CLC_OVERLOAD _CLC_DECL float3 cross(float3 p0, float3 p1);
 _CLC_OVERLOAD _CLC_DECL float4 cross(float4 p0, float4 p1);
 
 #ifdef cl_khr_fp64
 _CLC_OVERLOAD _CLC_DECL double3 cross(double3 p0, double3 p1);
 _CLC_OVERLOAD _CLC_DECL double4 cross(double4 p0, double4 p1);
 #endif
+
+#endif // __CLC_OPENCL_GEOMETRIC_CROSS_H__

libclc/opencl/include/clc/opencl/geometric/distance.h

@@ -6,9 +6,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_GEOMETRIC_DISTANCE_H__
+#define __CLC_OPENCL_GEOMETRIC_DISTANCE_H__
+
 #define FUNCTION distance
 #define __CLC_BODY <clc/geometric/binary_decl.inc>
 
 #include <clc/math/gentype.inc>
 
 #undef FUNCTION
+
+#endif // __CLC_OPENCL_GEOMETRIC_DISTANCE_H__

libclc/opencl/include/clc/opencl/geometric/dot.h

@@ -6,9 +6,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_GEOMETRIC_DOT_H__
+#define __CLC_OPENCL_GEOMETRIC_DOT_H__
+
 #define FUNCTION dot
 #define __CLC_BODY <clc/geometric/binary_decl.inc>
 
 #include <clc/math/gentype.inc>
 
 #undef FUNCTION
+
+#endif // __CLC_OPENCL_GEOMETRIC_DOT_H__

libclc/opencl/include/clc/opencl/geometric/fast_distance.h

@@ -6,10 +6,15 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __CLC_OPENCL_GEOMETRIC_FAST_DISTANCE_H__
+#define __CLC_OPENCL_GEOMETRIC_FAST_DISTANCE_H__
+
 #define __FLOAT_ONLY
 #define FUNCTION fast_distance
 #define __CLC_BODY <clc/geometric/binary_decl.inc>
 
 #include <clc/math/gentype.inc>
 
 #undef FUNCTION
+
+#endif // __CLC_OPENCL_GEOMETRIC_FAST_DISTANCE_H__