SPV: Implement Vulkan 1.1 features and extensions.

Test/findFunction.frag

@@ -0,0 +1,46 @@
+#version 450
+
+#extension GL_KHX_shader_explicit_arithmetic_types: enable
+
+int64_t func(int8_t a, int16_t b, int16_t c)
+{
+    return int64_t(a | b + c);
+}
+
+int64_t func(int8_t a, int16_t b, int32_t c)
+{
+    return int64_t(a | b - c);
+}
+
+int64_t func(int32_t a, int32_t b, int32_t c)
+{
+    return int64_t(a / b + c);
+}
+
+int64_t func(float16_t a, float16_t b, float32_t c)
+{
+    return int64_t(a - b * c);
+}
+
+int64_t func(float16_t a, int16_t b, float32_t c)
+{
+    return int64_t(a - b * c);
+}
+
+void main()
+{
+    int8_t  x;
+    int16_t y;
+    int32_t z;
+    int64_t w;
+    float16_t f16;
+    float64_t f64;
+    int64_t b1 = func(x, y, z);
+    int64_t b2 = func(y, y, z); // tie
+    int64_t b3 = func(y, y, w); // No match
+    int64_t b4 = func(y, z, f16); // No match
+    int64_t b5 = func(y, y, f16);
+    int64_t b7 = func(f16, f16, y);
+    int64_t b8 = func(f16, f16, f64); // No match
+    int64_t b9 = func(f16, x, f16); // tie
+}