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[wasm] Enable Liftoff everywhere

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We rely on Liftoff for debugging, hence enable it everywhere by default.
This follows a chromium finch experiment and a CL to enable it
everywhere in chrome: https://crrev.com/c/2252100

R=ecmziegler@chromium.org

Bug: chromium:1040030
Change-Id: I3abbf915515883e6eb1f37501466290def57862d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2252196
Reviewed-by: Emanuel Ziegler <ecmziegler@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68431}
This commit is contained in:
Clemens Backes 2020-06-19 10:10:02 +02:00 committed by Commit Bot
parent b45f718692
commit c6642b5112
1 changed files with 0 additions and 8 deletions
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8
src/flags/flag-definitions.h
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@ -723,16 +723,8 @@ DEFINE_DEBUG_BOOL(trace_wasm_streaming, false,
DEFINE_INT(trace_wasm_ast_start, 0,
"start function for wasm AST trace (inclusive)")
DEFINE_INT(trace_wasm_ast_end, 0, "end function for wasm AST trace (exclusive)")
// Enable Liftoff by default on ia32 and x64. More architectures will follow
// once they are implemented and sufficiently tested.
#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64
DEFINE_BOOL(liftoff, true,
"enable Liftoff, the baseline compiler for WebAssembly")
#else
DEFINE_BOOL(liftoff, false,
"enable Liftoff, the baseline compiler for WebAssembly")
DEFINE_IMPLICATION(future, liftoff)
#endif
// We can't tier up (from Liftoff to TurboFan) in single-threaded mode, hence
// disable Liftoff in that configuration for now. The alternative is disabling
// TurboFan, which would reduce peak performance considerably.