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[build] Introduce build flag to disable turbofan.

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BUG=chromium:682617

Change-Id: I58800e5cf1926fabc684e0f140c2856175877bda
Reviewed-on: https://chromium-review.googlesource.com/451418
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43652}
This commit is contained in:
Michael Achenbach 2017-03-07 15:50:16 +01:00 committed by Commit Bot
parent b23f6a462e
commit 5f00d289f6
2 changed files with 14 additions and 1 deletions
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6
BUILD.gn
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@ -23,6 +23,9 @@ declare_args() {
# Sets -DV8_ENABLE_FUTURE.
v8_enable_future = false
# Sets -DV8_DISABLE_TURBO.
v8_disable_turbo = false
# Sets -DVERIFY_HEAP.
v8_enable_verify_heap = ""
@ -203,6 +206,9 @@ config("features") {
if (v8_enable_future) {
defines += [ "V8_ENABLE_FUTURE" ]
}
if (v8_disable_turbo) {
defines += [ "V8_DISABLE_TURBO" ]
}
if (v8_enable_gdbjit) {
defines += [ "ENABLE_GDB_JIT_INTERFACE" ]
}

9
src/flag-definitions.h
View File

@ -441,7 +441,14 @@ DEFINE_BOOL(omit_map_checks_for_leaf_maps, true,
"deoptimize the optimized code if the layout of the maps changes.")
// Flags for TurboFan.
DEFINE_BOOL(turbo, false, "enable TurboFan compiler")
#ifdef V8_DISABLE_TURBO
// Allow to disable turbofan with a build flag after it's turned on by default.
#define TURBO_BOOL false
#else
// TODO(mvstanton): Turn on turbofan here.
#define TURBO_BOOL false
#endif
DEFINE_BOOL(turbo, TURBO_BOOL, "enable TurboFan compiler")
DEFINE_BOOL(turbo_sp_frame_access, false,
"use stack pointer-relative access to frame wherever possible")
DEFINE_BOOL(turbo_preprocess_ranges, true,