spirv: add test for SPIR-V string constants with c constraint

Author: ivanstepanovftw

src/codegen/spirv/Module.zig

@@ -506,15 +506,15 @@ pub fn resolveString(self: *Module, string: []const u8) !Id {
     return id;
 }
 
-pub fn constStringGlobal(self: *Module, str: []const u8) !IdRef {
+pub fn constStringGlobal(self: *Module, str: []const u8) !Id {
     if (self.cache.const_strings.get(str)) |id| return id;
 
     const u8_ty = try self.intType(.unsigned, 8);
     const len = str.len + 1;
     const len_id = try self.constant(try self.intType(.unsigned, 32), .{ .uint32 = @intCast(len) });
     const arr_ty = try self.arrayType(len_id, u8_ty);
 
-    const char_ids = try self.gpa.alloc(IdRef, len);
+    const char_ids = try self.gpa.alloc(Id, len);
     defer self.gpa.free(char_ids);
     for (str, 0..) |c, i| {
         char_ids[i] = try self.constant(u8_ty, .{ .uint32 = c });
@@ -531,15 +531,15 @@ pub fn constStringGlobal(self: *Module, str: []const u8) !IdRef {
     const ptr_ty = self.allocId();
     try self.sections.types_globals_constants.emit(self.gpa, .OpTypePointer, .{
         .id_result = ptr_ty,
-        .storage_class = .UniformConstant,
+        .storage_class = .uniform_constant,
         .type = arr_ty,
     });
 
     const var_id = self.allocId();
     try self.sections.types_globals_constants.emit(self.gpa, .OpVariable, .{
         .id_result_type = ptr_ty,
         .id_result = var_id,
-        .storage_class = .UniformConstant,
+        .storage_class = .uniform_constant,
         .initializer = const_arr_id,
     });
 

test/behavior/asm.zig

@@ -179,3 +179,13 @@ test "asm modifiers (AArch64)" {
     );
     try expectEqual(2 * x, double);
 }
+
+test "SPIR-V string constants with c constraint" {
+    if (builtin.zig_backend != .stage2_spirv) return error.SkipZigTest;
+    if (builtin.target.os.tag != .opencl) return error.SkipZigTest;
+
+    _ = std.gpu.printf("testing printf\n", .{});
+    var a: i32 = -10;
+    _ = &a;
+    _ = std.gpu.printf("a: %d, a + 10: %d\n", .{ a, a + 10 });
+}