[SPIR-V] Add test with windows mangling

Signed-off-by: Victor Lomuller <victor@codeplay.com>

Author: Naghasan

clang/test/CodeGenSPIRV/spirv-builtin-lookup-win.cpp

@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -triple x86_64-windows-msvc -fdeclare-spirv-builtins -fsyntax-only -emit-llvm %s -o - | FileCheck %s
+
+float acos(float val) {
+  // CHECK: @"?acos@@YAMM@Z"
+  // CHECK: call float @"?__spirv_ocl_acos@@YAMM@Z"
+  return __spirv_ocl_acos(val);
+}
+
+// CHECK: declare dso_local float @"?__spirv_ocl_acos@@YAMM@Z"(float)
+
+double acos(double val) {
+  // CHECK: @"?acos@@YANN@Z"
+  // CHECK: call double @"?__spirv_ocl_acos@@YANN@Z"
+  return __spirv_ocl_acos(val);
+}
+
+// CHECK: declare dso_local double @"?__spirv_ocl_acos@@YANN@Z"(double)

clang/test/CodeGenSPIRV/spirv-builtin-lookup.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fdeclare-spirv-builtins -fsyntax-only -emit-llvm %s -o - | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fdeclare-spirv-builtins -fsyntax-only -emit-llvm %s -o - | FileCheck %s
 
 float acos(float val) {
   // CHECK: @_Z4acosf