[Vulkan] Added conversion from bool to float. (#3513)

* Added bool to float conversion support to spirv ir builder.

* Added unittest for vulkan bool conversion.

* Typo fix.

src/codegen/spirv/ir_builder.cc

@@ -462,6 +462,9 @@ Value IRBuilder::Cast(const SType& dst_type, spirv::Value value) {
       return Select(value, IntImm(dst_type, 1), IntImm(dst_type, 0));
     } else if (to.is_uint()) {
       return Select(value, UIntImm(dst_type, 1), UIntImm(dst_type, 0));
+    } else if (to.is_float()) {
+      return MakeValue(spv::OpConvertUToF, dst_type,
+                       Select(value, UIntImm(t_uint32_, 1), UIntImm(t_uint32_, 0)));
     } else {
       LOG(FATAL) << "cannot cast from " << from << " to " << to;
       return Value();

src/runtime/vulkan/vulkan_device_api.cc

@@ -683,7 +683,7 @@ void VulkanWorkspace::Init() {
   try {
     instance_ = CreateInstance();
     context_ = GetContext(instance_);
-    LOG(INFO) << "Initialzie Vulkan with " << context_.size() << " devices..";
+    LOG(INFO) << "Initialize Vulkan with " << context_.size() << " devices..";
     for (size_t i = 0; i < context_.size(); ++i) {
       LOG(INFO) << "vulkan(" << i
                 <<  ")=\'" << context_[i].phy_device_prop.deviceName

tests/python/unittest/test_codegen_bool.py

@@ -24,7 +24,8 @@ def test_cmp_load_store():
     A = tvm.placeholder((n,), name='A')
     B = tvm.placeholder((n,), name='B')
     C = tvm.compute(A.shape, lambda *i: A(*i) > B(*i), name='C')
-    D = tvm.compute(C.shape, lambda *i: tvm.all(C(*i), A(*i) > 1), name="D")
+    D = tvm.compute(C.shape, lambda *i: tvm.all(C(*i),
+                                                A(*i) > 1).astype('float32'), name="D")
 
 
     def check_llvm():
@@ -43,7 +44,7 @@ def test_cmp_load_store():
         d = tvm.nd.array(np.zeros(n, dtype=D.dtype), ctx)
         f(a, b, d)
         np.testing.assert_equal(
-            d.asnumpy(), np.logical_and(a.asnumpy()> b.asnumpy(), a.asnumpy() > 1))
+            d.asnumpy(), np.logical_and(a.asnumpy() > b.asnumpy(), a.asnumpy() > 1).astype('float32'))
 
     def check_device(device):
         ctx = tvm.context(device, 0)
@@ -61,7 +62,7 @@ def test_cmp_load_store():
         d = tvm.nd.array(np.zeros(n, dtype=D.dtype), ctx)
         f(a, b, d)
         np.testing.assert_equal(
-            d.asnumpy(), np.logical_and(a.asnumpy()> b.asnumpy(), a.asnumpy() > 1))
+            d.asnumpy(), np.logical_and(a.asnumpy() > b.asnumpy(), a.asnumpy() > 1).astype('float32'))
 
 
     check_llvm()