Add continuing validation tests. (#3314)

This CL adds validation tests for the `continuing` block.

src/webgpu/listing_meta.json

@@ -2102,6 +2102,7 @@
   "webgpu:shader,execution,expression,call,builtin,bitcast:ai_to_f32:*": { "subcaseMS": 0 },
   "webgpu:shader,execution,expression,call,builtin,bitcast:ai_to_vec2f16:*": { "subcaseMS": 0 },
   "webgpu:shader,execution,expression,call,builtin,bitcast:vec2ai_to_vec4f16:*": { "subcaseMS": 0 },
+  "webgpu:shader,validation,parse,continuing:placement:*": { "subcaseMS": 0 },
   "webgpu:shader,validation,parse,break_if:placement:*": { "subcaseMS": 0 },
   "webgpu:shader,validation,parse,break_if:non_bool_param:*": { "subcaseMS": 0 },
   "webgpu:shader,validation,expression,call,builtin,arrayLength:bool_type:*": { "subcaseMS": 0 },

src/webgpu/shader/validation/parse/continuing.spec.ts

@@ -0,0 +1,185 @@
+export const description = `Validation tests for continuing`;
+
+import { makeTestGroup } from '../../../../common/framework/test_group.js';
+import { keysOf } from '../../../../common/util/data_tables.js';
+import { ShaderValidationTest } from '../shader_validation_test.js';
+
+export const g = makeTestGroup(ShaderValidationTest);
+
+const kTests = {
+  continuing_break_if: {
+    src: 'loop { continuing { break if true; } }',
+    pass: true,
+  },
+  continuing_empty: {
+    src: 'loop { if a == 4 { break; } continuing { } }',
+    pass: true,
+  },
+  continuing_break_if_parens: {
+    src: 'loop { continuing { break if (true); } }',
+    pass: true,
+  },
+  continuing_discard: {
+    src: 'loop { if a == 4 { break; } continuing { discard; } }',
+    pass: true,
+  },
+  continuing_continue_nested: {
+    src: 'loop { if a == 4 { break; } continuing { loop { if a == 4 { break; } continue; } } }',
+    pass: true,
+  },
+  continuing_continue: {
+    src: 'loop { if a == 4 { break; } continuing { continue; } }',
+    pass: false,
+  },
+  continuing_break: {
+    src: 'loop { continuing { break; } }',
+    pass: false,
+  },
+  continuing_for: {
+    src: 'loop { if a == 4 { break; } continuing { for(;a < 4;) { } } }',
+    pass: true,
+  },
+  continuing_for_break: {
+    src: 'loop { if a == 4 { break; } continuing { for(;;) { break; } } }',
+    pass: true,
+  },
+  continuing_while: {
+    src: 'loop { if a == 4 { break; } continuing { while a < 4 { } } }',
+    pass: true,
+  },
+  continuing_while_break: {
+    src: 'loop { if a == 4 { break; } continuing { while true { break; } } }',
+    pass: true,
+  },
+  continuing_semicolon: {
+    src: 'loop { if a == 4 { break; } continuing { ; } }',
+    pass: true,
+  },
+  continuing_functionn_call: {
+    src: 'loop { if a == 4 { break; } continuing { _ = b(); } }',
+    pass: true,
+  },
+  continuing_let: {
+    src: 'loop { if a == 4 { break; } continuing { let c = b(); } }',
+    pass: true,
+  },
+  continuing_var: {
+    src: 'loop { if a == 4 { break; } continuing { var a = b(); } }',
+    pass: true,
+  },
+  continuing_const: {
+    src: 'loop { if a == 4 { break; } continuing { const a = 1; } }',
+    pass: true,
+  },
+  continuing_block: {
+    src: 'loop { if a == 4 { break; } continuing { { } } }',
+    pass: true,
+  },
+  continuing_const_assert: {
+    src: 'loop { if a == 4 { break; } continuing { const_assert(1 != 2); } }',
+    pass: true,
+  },
+  continuing_loop: {
+    src: 'loop { if a == 4 { break; } continuing { loop { break; } } }',
+    pass: true,
+  },
+  continuing_if: {
+    src: 'loop { if a == 4 { break; } continuing { if true { } else if false { } else { } } }',
+    pass: true,
+  },
+  continuing_switch: {
+    src: 'loop { if a == 4 { break; } continuing { switch 2 { default: { } } } }',
+    pass: true,
+  },
+  continuing_switch_break: {
+    src: 'loop { if a == 4 { break; } continuing { switch 2 { default: { break; } } } }',
+    pass: true,
+  },
+  continuing_loop_nested_continuing: {
+    src: 'loop { if a == 4 { break; } continuing { loop { if a == 4 { break; } continuing { } } } }',
+    pass: true,
+  },
+  continuing_inc: {
+    src: 'loop { if a == 4 { break; } continuing { a += 1; } }',
+    pass: true,
+  },
+  continuing_dec: {
+    src: 'loop { if a == 4 { break; } continuing { a -= 1; } }',
+    pass: true,
+  },
+  while: {
+    src: 'while a < 4 { continuing { break if true; } }',
+    pass: false,
+  },
+  for: {
+    src: 'for (;a < 4;) { continuing { break if true; } }',
+    pass: false,
+  },
+  switch_case: {
+    src: 'switch(1) { default: { continuing { break if true; } } }',
+    pass: false,
+  },
+  switch: {
+    src: 'switch(1) { continuing { break if true; } }',
+    pass: false,
+  },
+  continuing: {
+    src: 'continuing { break if true; }',
+    pass: false,
+  },
+  return: {
+    src: 'return continuing { break if true; }',
+    pass: false,
+  },
+  if_body: {
+    src: 'if true { continuing { break if true; } }',
+    pass: false,
+  },
+  if: {
+    src: 'if true { } continuing { break if true; } }',
+    pass: false,
+  },
+  if_else: {
+    src: 'if true { } else { } continuing { break if true; } }',
+    pass: false,
+  },
+  continuing_continuing: {
+    src: 'loop { if a == 4 { break; } continuing { continuing { break if true; } } }',
+    pass: false,
+  },
+  no_body: {
+    src: 'loop { if a == 4 { break; } continuing }',
+    pass: false,
+  },
+  return_in_continue: {
+    src: 'loop { if a == 4 { break; } continuing { return vec4f(2); } }',
+    pass: false,
+  },
+  return_if_nested_in_continue: {
+    src: 'loop { if a == 4 { break; } continuing { if true { return vec4f(2); } } }',
+    pass: false,
+  },
+  return_for_nested_in_continue: {
+    src: 'loop { if a == 4 { break; } continuing { for(;a < 4;) { return vec4f(2); } } }',
+    pass: false,
+  },
+};
+
+g.test('placement')
+  .desc('Test that continuing placement is validated correctly')
+  .params(u => u.combine('stmt', keysOf(kTests)))
+  .fn(t => {
+    const code = `
+fn b() -> i32 {
+  return 1;
+}
+
+@fragment
+fn frag() -> @location(0) vec4f {
+  var a = 0;
+  ${kTests[t.params.stmt].src}
+  return vec4f(1);
+}
+    `;
+    t.expectCompileResult(kTests[t.params.stmt].pass, code);
+  });