Add flag to use spvc parser in tests

This also changes the name to be consistent with the option being set
in the spvc API.

BUG=dawn:335

Change-Id: I6f7431095493874e1fef0856e563f7f1225cfc21
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15780
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>

src/dawn_native/ShaderModule.cpp

@@ -180,6 +180,9 @@ namespace dawn_native {
     ShaderModuleBase::ShaderModuleBase(DeviceBase* device, const ShaderModuleDescriptor* descriptor)
         : CachedObject(device), mCode(descriptor->code, descriptor->code + descriptor->codeSize) {
         mFragmentOutputFormatBaseTypes.fill(Format::Other);
+        if (GetDevice()->IsToggleEnabled(Toggle::UseSpvcParser)) {
+            mSpvcContext.SetUseSpvcParser(true);
+        }
     }
 
     ShaderModuleBase::ShaderModuleBase(DeviceBase* device, ObjectBase::ErrorTag tag)

src/dawn_native/Toggles.cpp

@@ -91,8 +91,8 @@ namespace dawn_native {
               "Enable use of spvc for shader compilation, instead of accessing spirv_cross "
               "directly.",
               "https://crbug.com/dawn/288"}},
-            {Toggle::UseSpvcIRGen,
-             {"use_spvc_ir_gen",
+            {Toggle::UseSpvcParser,
+             {"use_spvc_parser",
               "Enable usage of spvc's internal parsing and IR generation code, instead of "
               "spirv_cross's.",
               "https://crbug.com/dawn/288"}},

src/dawn_native/Toggles.h

@@ -34,7 +34,7 @@ namespace dawn_native {
         UseD3D12RenderPass,
         SkipValidation,
         UseSpvc,
-        UseSpvcIRGen,
+        UseSpvcParser,
         VulkanUseD32S8,
 
         EnumCount,

src/tests/DawnTest.cpp

@@ -149,6 +149,13 @@ DawnTestEnvironment::DawnTestEnvironment(int argc, char** argv) {
             continue;
         }
 
+        if (strcmp("--use-spvc-parser", argv[i]) == 0) {
+            mUseSpvc = true;  // It's impossible to use the spvc parser without using spvc, so
+                              // turning on mUseSpvc implicitly.
+            mUseSpvcParser = true;
+            continue;
+        }
+
         constexpr const char kVendorIdFilterArg[] = "--adapter-vendor-id=";
         if (strstr(argv[i], kVendorIdFilterArg) == argv[i]) {
             const char* vendorIdFilter = argv[i] + strlen(kVendorIdFilterArg);
@@ -217,6 +224,9 @@ void DawnTestEnvironment::SetUp() {
                     << "\n"
                        "UseSpvc: "
                     << (mUseSpvc ? "true" : "false")
+                    << "\n"
+                       "UseSpvcParser: "
+                    << (mUseSpvcParser ? "true" : "false")
                     << "\n"
                        "BeginCaptureOnStartup: "
                     << (mBeginCaptureOnStartup ? "true" : "false")
@@ -270,6 +280,10 @@ bool DawnTestEnvironment::IsSpvcBeingUsed() const {
     return mUseSpvc;
 }
 
+bool DawnTestEnvironment::IsSpvcParserBeingUsed() const {
+    return mUseSpvcParser;
+}
+
 dawn_native::Instance* DawnTestEnvironment::GetInstance() const {
     return mInstance.get();
 }
@@ -519,10 +533,19 @@ void DawnTestBase::SetUp() {
     }
 
     static constexpr char kUseSpvcToggle[] = "use_spvc";
+    static constexpr char kUseSpvcParserToggle[] = "use_spvc_parser";
     if (gTestEnv->IsSpvcBeingUsed()) {
         ASSERT(gTestEnv->GetInstance()->GetToggleInfo(kUseSpvcToggle) != nullptr);
         deviceDescriptor.forceEnabledToggles.push_back(kUseSpvcToggle);
+
+        if (gTestEnv->IsSpvcParserBeingUsed()) {
+            ASSERT(gTestEnv->GetInstance()->GetToggleInfo(kUseSpvcParserToggle) != nullptr);
+            deviceDescriptor.forceEnabledToggles.push_back(kUseSpvcParserToggle);
+        }
+
     } else {
+        // Turning on spvc parser should always turn on spvc.
+        ASSERT(!gTestEnv->IsSpvcParserBeingUsed());
         ASSERT(gTestEnv->GetInstance()->GetToggleInfo(kUseSpvcToggle) != nullptr);
         deviceDescriptor.forceDisabledToggles.push_back(kUseSpvcToggle);
     }

src/tests/DawnTest.h

@@ -137,6 +137,7 @@ class DawnTestEnvironment : public testing::Environment {
     bool IsBackendValidationEnabled() const;
     bool IsDawnValidationSkipped() const;
     bool IsSpvcBeingUsed() const;
+    bool IsSpvcParserBeingUsed() const;
     dawn_native::Instance* GetInstance() const;
     bool HasVendorIdFilter() const;
     uint32_t GetVendorIdFilter() const;
@@ -152,6 +153,7 @@ class DawnTestEnvironment : public testing::Environment {
     bool mEnableBackendValidation = false;
     bool mSkipDawnValidation = false;
     bool mUseSpvc = false;
+    bool mUseSpvcParser = false;
     bool mBeginCaptureOnStartup = false;
     bool mHasVendorIdFilter = false;
     uint32_t mVendorIdFilter = 0;