Fix crash when using -ffp-accuracy and std:: trigonometric functions. (#11606)

This is to fix a crash in the host compilation when calling any std::
trigonometric function.

Author: zahiraam

clang/lib/CodeGen/CGCall.cpp

@@ -5688,10 +5688,11 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
     if (!getLangOpts().FPAccuracyFuncMap.empty() ||
         !getLangOpts().FPAccuracyVal.empty()) {
       const auto *FD = dyn_cast_if_present<FunctionDecl>(TargetDecl);
-      assert(FD && "expecting a function");
-      CI = EmitFPBuiltinIndirectCall(IRFuncTy, IRCallArgs, CalleePtr, FD);
-      if (CI)
-        return RValue::get(CI);
+      if (FD) {
+        CI = EmitFPBuiltinIndirectCall(IRFuncTy, IRCallArgs, CalleePtr, FD);
+        if (CI)
+          return RValue::get(CI);
+      }
     }
     CI = Builder.CreateCall(IRFuncTy, CalleePtr, IRCallArgs, BundleList);
   } else {

sycl/test/basic_tests/fp-accuracy.cpp

@@ -0,0 +1,18 @@
+// RUN: %clangxx -%fsycl-host-only -c -ffp-accuracy=high -faltmathlib=SVMLAltMathLibrary -fno-math-errno %s
+
+#include <sycl/sycl.hpp>
+using namespace sycl;
+
+int main() {
+  queue deviceQueue;
+  double Value = 5.;
+
+  deviceQueue.submit([&](handler &cgh) {
+    cgh.single_task<class Kernel0>([=]() { double res = std::sin(Value); });
+  });
+
+  deviceQueue.submit([&](handler &cgh) {
+    cgh.single_task<class Kernel1>([=]() { double res = sycl::sin(Value); });
+  });
+  return 0;
+}