SpirvShader: Implement GLSLstd450Sin

Bug: b/126873455
Tests: dEQP-VK.glsl.builtin.precision.sin.*
Change-Id: Iec96b2a235534fbc5b76c699a6b62679b75582ca
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28668
Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

src/Reactor/LLVMReactor.cpp

diff --git a/src/Reactor/LLVMReactor.cpp b/src/Reactor/LLVMReactor.cpp
index 55ca049..abe35df 100644
--- a/src/Reactor/LLVMReactor.cpp
+++ b/src/Reactor/LLVMReactor.cpp
@@ -554,6 +554,7 @@
 			func_.emplace("printf", reinterpret_cast<void*>(printf));
 			func_.emplace("puts", reinterpret_cast<void*>(puts));
 			func_.emplace("fmodf", reinterpret_cast<void*>(fmodf));
+			func_.emplace("sinf", reinterpret_cast<void*>(sinf));
 		}
 
 		void *findSymbol(const std::string &name) const
@@ -3063,6 +3064,12 @@
 		}
 	}
 
+	RValue<Float4> Sin(RValue<Float4> v)
+	{
+		auto func = llvm::Intrinsic::getDeclaration(::module, llvm::Intrinsic::sin, { V(v.value)->getType() } );
+		return RValue<Float4>(V(::builder->CreateCall(func, V(v.value))));
+	}
+
 	Type *Float4::getType()
 	{
 		return T(llvm::VectorType::get(T(Float::getType()), 4));

src/Reactor/Reactor.hpp

diff --git a/src/Reactor/Reactor.hpp b/src/Reactor/Reactor.hpp
index bb32a46..41e15c8 100644
--- a/src/Reactor/Reactor.hpp
+++ b/src/Reactor/Reactor.hpp
@@ -2206,6 +2206,10 @@
 	RValue<Float4> Floor(RValue<Float4> x);
 	RValue<Float4> Ceil(RValue<Float4> x);
 
+	// Trigonometric functions
+	// TODO: Currentlhy unimplemented for Subzero.
+	RValue<Float4> Sin(RValue<Float4> x);
+
 	template<class T>
 	class Pointer : public LValue<Pointer<T>>
 	{