[foozzie] Update existing configs for liftoff

Instead of having a separate liftoff config, which is tested against
the default (which currently means tier-up from liftoff to turbofan),
just choose reasonable liftoff configs for the existing configs.
'ignition' now implies pure liftoff execution.
'ignition_turbo_opt' always compiles with turbofan.
Other configs use the default (tier up).

R=machenbach@chromium.org

Bug: chromium:824098, v8:6600
Change-Id: I92c008fc1b1fa54d3161fb5695a095127d6ac263
Reviewed-on: https://chromium-review.googlesource.com/1141731Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54548}

tools/clusterfuzz/testdata/failure_output.txt

@@ -9,7 +9,7 @@
 # Compared x64,ignition with x64,ignition_turbo
 #
 # Flags of x64,ignition:
---abort_on_stack_or_string_length_overflow --expose-gc --allow-natives-syntax --invoke-weak-callbacks --omit-quit --es-staging --wasm-num-compilation-tasks=0 --random-seed 12345 --turbo-filter=~ --noopt --suppress-asm-messages
+--abort_on_stack_or_string_length_overflow --expose-gc --allow-natives-syntax --invoke-weak-callbacks --omit-quit --es-staging --wasm-num-compilation-tasks=0 --random-seed 12345 --turbo-filter=~ --noopt --suppress-asm-messages --liftoff --no-wasm-tier-up
 # Flags of x64,ignition_turbo:
 --abort_on_stack_or_string_length_overflow --expose-gc --allow-natives-syntax --invoke-weak-callbacks --omit-quit --es-staging --wasm-num-compilation-tasks=0 --random-seed 12345 --suppress-asm-messages --stress-scavenge=100
 #

tools/clusterfuzz/v8_foozzie.py

@@ -28,6 +28,8 @@ CONFIGS = dict(
     '--turbo-filter=~',
     '--noopt',
     '--suppress-asm-messages',
+    '--liftoff',
+    '--no-wasm-tier-up',
   ],
   ignition_asm=[
     '--turbo-filter=~',
@@ -49,6 +51,8 @@ CONFIGS = dict(
   ignition_turbo_opt=[
     '--always-opt',
     '--suppress-asm-messages',
+    '--no-liftoff',
+    '--no-wasm-tier-up',
   ],
   ignition_turbo_opt_eager=[
     '--always-opt',
@@ -56,11 +60,6 @@ CONFIGS = dict(
     '--no-lazy-inner-functions',
     '--suppress-asm-messages',
   ],
-  liftoff=[
-    '--liftoff',
-    '--no-wasm-tier-up',
-    '--suppress-asm-messages',
-  ],
   slow_path=[
     '--force-slow-path',
     '--suppress-asm-messages',

tools/clusterfuzz/v8_foozzie_test.py

@@ -39,7 +39,7 @@ class ConfigTest(unittest.TestCase):
     self.assertEqual(
         [
           '--first-config=ignition',
-          '--second-config=ignition_turbo_opt',
+          '--second-config=ignition_turbo',
           '--second-d8=d8',
         ],
         v8_fuzz_config.Config('foo', Rng()).choose_foozzie_flags(),

tools/clusterfuzz/v8_fuzz_config.py

@@ -13,15 +13,13 @@ FOOZZIE_EXPERIMENTS = [
   [5, 'ignition', 'trusted_opt', 'd8'],
   [10, 'ignition', 'slow_path', 'd8'],
   [5, 'ignition', 'slow_path_opt', 'd8'],
-  [20, 'ignition', 'ignition_turbo', 'd8'],
+  [25, 'ignition', 'ignition_turbo', 'd8'],
   [20, 'ignition', 'ignition_turbo_opt', 'd8'],
-  [4, 'ignition_turbo_opt', 'ignition_turbo_opt', 'clang_x86/d8'],
-  [4, 'ignition_turbo', 'ignition_turbo', 'clang_x86/d8'],
-  [4, 'ignition', 'ignition', 'clang_x86/d8'],
+  [5, 'ignition_turbo_opt', 'ignition_turbo_opt', 'clang_x86/d8'],
+  [5, 'ignition_turbo', 'ignition_turbo', 'clang_x86/d8'],
+  [5, 'ignition', 'ignition', 'clang_x86/d8'],
   [5, 'ignition', 'ignition', 'clang_x64_v8_arm64/d8'],
   [5, 'ignition', 'ignition', 'clang_x86_v8_arm/d8'],
-  [5, 'ignition', 'liftoff', 'd8'],
-  [3, 'liftoff', 'liftoff', 'clang_x86/d8'],
 ]
 
 class Config(object):