Added radians to clang

Author: adam-yang

clang/include/clang/Basic/Builtins.td

@@ -4788,6 +4788,12 @@ def HLSLStep: LangBuiltin<"HLSL_LANG"> {
   let Prototype = "void(...)";
 }
 
+def HLSLRadians : LangBuiltin<"HLSL_LANG"> {
+  let Spellings = ["__builtin_hlsl_elementwise_radians"];
+  let Attributes = [NoThrow, Const];
+  let Prototype = "void(...)";
+}
+
 // Builtins for XRay.
 def XRayCustomEvent : Builtin {
   let Spellings = ["__xray_customevent"];

clang/lib/CodeGen/CGBuiltin.cpp

@@ -18852,6 +18852,14 @@ case Builtin::BI__builtin_hlsl_elementwise_isinf: {
         retType, CGM.getHLSLRuntime().getSignIntrinsic(),
         ArrayRef<Value *>{Op0}, nullptr, "hlsl.sign");
   }
+  case Builtin::BI__builtin_hlsl_elementwise_radians: {
+    Value *Op0 = EmitScalarExpr(E->getArg(0));
+    if (!E->getArg(0)->getType()->hasFloatingRepresentation())
+      llvm_unreachable("radians operand must have a float representation");
+    return Builder.CreateIntrinsic(
+        /*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getRadiansIntrinsic(),
+        ArrayRef<Value *>{Op0}, nullptr, "hlsl.radians");
+  }
   }
   return nullptr;
 }

clang/lib/CodeGen/CGHLSLRuntime.h

@@ -82,6 +82,7 @@ class CGHLSLRuntime {
   GENERATE_HLSL_INTRINSIC_FUNCTION(Saturate, saturate)
   GENERATE_HLSL_INTRINSIC_FUNCTION(Sign, sign)
   GENERATE_HLSL_INTRINSIC_FUNCTION(Step, step)
+  GENERATE_HLSL_INTRINSIC_FUNCTION(Radians, radians)
   GENERATE_HLSL_INTRINSIC_FUNCTION(ThreadId, thread_id)
   GENERATE_HLSL_INTRINSIC_FUNCTION(FDot, fdot)
   GENERATE_HLSL_INTRINSIC_FUNCTION(SDot, sdot)

clang/lib/Headers/hlsl/hlsl_intrinsics.h

@@ -2086,5 +2086,35 @@ _HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_sign)
 int3 sign(double3);
 _HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_sign)
 int4 sign(double4);
+
+//===----------------------------------------------------------------------===//
+// radians builtins
+//===----------------------------------------------------------------------===//
+
+/// \fn T radians(T Val)
+/// \brief Converts the specified value from degrees to radians.
+
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+half radians(half);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+half2 radians(half2);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+half3 radians(half3);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+half4 radians(half4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+float radians(float);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+float2 radians(float2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+float3 radians(float3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_radians)
+float4 radians(float4);
+
 } // namespace hlsl
 #endif //_HLSL_HLSL_INTRINSICS_H_

clang/lib/Sema/SemaHLSL.cpp

@@ -1861,6 +1861,7 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
       return true;
     break;
   }
+  case Builtin::BI__builtin_hlsl_elementwise_radians:
   case Builtin::BI__builtin_hlsl_elementwise_rsqrt:
   case Builtin::BI__builtin_hlsl_elementwise_frac: {
     if (CheckFloatOrHalfRepresentations(&SemaRef, TheCall))

clang/test/CodeGenHLSL/builtins/radians.hlsl

@@ -0,0 +1,54 @@
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -fnative-half-type \
+// RUN:   -emit-llvm -disable-llvm-passes -o - | FileCheck %s \ 
+// RUN:   --check-prefixes=CHECK,NATIVE_HALF
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN:   -o - | FileCheck %s --check-prefixes=CHECK,NO_HALF
+
+// NATIVE_HALF: define noundef half @
+// NATIVE_HALF: %{{.*}} = call half @llvm.dx.radians.f16(
+// NATIVE_HALF: ret half %{{.*}}
+// NO_HALF: define noundef float @"?test_radians_half@@YA$halff@$halff@@Z"(
+// NO_HALF: %{{.*}} = call float @llvm.dx.radians.f32(
+// NO_HALF: ret float %{{.*}}
+half test_radians_half(half p0) { return radians(p0); }
+// NATIVE_HALF: define noundef <2 x half> @
+// NATIVE_HALF: %{{.*}} = call <2 x half> @llvm.dx.radians.v2f16
+// NATIVE_HALF: ret <2 x half> %{{.*}}
+// NO_HALF: define noundef <2 x float> @
+// NO_HALF: %{{.*}} = call <2 x float> @llvm.dx.radians.v2f32(
+// NO_HALF: ret <2 x float> %{{.*}}
+half2 test_radians_half2(half2 p0) { return radians(p0); }
+// NATIVE_HALF: define noundef <3 x half> @
+// NATIVE_HALF: %{{.*}} = call <3 x half> @llvm.dx.radians.v3f16
+// NATIVE_HALF: ret <3 x half> %{{.*}}
+// NO_HALF: define noundef <3 x float> @
+// NO_HALF: %{{.*}} = call <3 x float> @llvm.dx.radians.v3f32(
+// NO_HALF: ret <3 x float> %{{.*}}
+half3 test_radians_half3(half3 p0) { return radians(p0); }
+// NATIVE_HALF: define noundef <4 x half> @
+// NATIVE_HALF: %{{.*}} = call <4 x half> @llvm.dx.radians.v4f16
+// NATIVE_HALF: ret <4 x half> %{{.*}}
+// NO_HALF: define noundef <4 x float> @
+// NO_HALF: %{{.*}} = call <4 x float> @llvm.dx.radians.v4f32(
+// NO_HALF: ret <4 x float> %{{.*}}
+half4 test_radians_half4(half4 p0) { return radians(p0); }
+
+// CHECK: define noundef float @
+// CHECK: %{{.*}} = call float @llvm.dx.radians.f32(
+// CHECK: ret float %{{.*}}
+float test_radians_float(float p0) { return radians(p0); }
+// CHECK: define noundef <2 x float> @
+// CHECK: %{{.*}} = call <2 x float> @llvm.dx.radians.v2f32
+// CHECK: ret <2 x float> %{{.*}}
+float2 test_radians_float2(float2 p0) { return radians(p0); }
+// CHECK: define noundef <3 x float> @
+// CHECK: %{{.*}} = call <3 x float> @llvm.dx.radians.v3f32
+// CHECK: ret <3 x float> %{{.*}}
+float3 test_radians_float3(float3 p0) { return radians(p0); }
+// CHECK: define noundef <4 x float> @
+// CHECK: %{{.*}} = call <4 x float> @llvm.dx.radians.v4f32
+// CHECK: ret <4 x float> %{{.*}}
+float4 test_radians_float4(float4 p0) { return radians(p0); }
+

clang/test/SemaHLSL/BuiltIns/radians-errors.hlsl

@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -emit-llvm-only -disable-llvm-passes -verify -verify-ignore-unexpected
+
+float test_too_few_arg() {
+  return __builtin_hlsl_elementwise_radians();
+  // expected-error@-1 {{too few arguments to function call, expected 1, have 0}}
+}
+
+float2 test_too_many_arg(float2 p0) {
+  return __builtin_hlsl_elementwise_radians(p0, p0);
+  // expected-error@-1 {{too many arguments to function call, expected 1, have 2}}
+}
+
+float builtin_bool_to_float_type_promotion(bool p1) {
+  return __builtin_hlsl_elementwise_radians(p1);
+  // expected-error@-1 {passing 'bool' to parameter of incompatible type 'float'}}
+}
+
+float builtin_radians_int_to_float_promotion(int p1) {
+  return __builtin_hlsl_elementwise_radians(p1);
+  // expected-error@-1 {{passing 'int' to parameter of incompatible type 'float'}}
+}
+
+float2 builtin_radians_int2_to_float2_promotion(int2 p1) {
+  return __builtin_hlsl_elementwise_radians(p1);
+  // expected-error@-1 {{passing 'int2' (aka 'vector<int, 2>') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(float)))) float' (vector of 2 'float' values)}}
+}
+