Reviewers: danno,
Description:
Add a 'v8_optimized_debug' option to the build flags
This allows us to do a build with the DEBUG macros enabled and
with all of the compiler optimizations still happening. This provides
a speedup of 3x - 4x when running the layout tests in chromium/blink.
[email protected]
BUG=https://code.google.com/p/chromium/issues/detail?id=254188
Please review this at https://codereview.chromium.org/18431003/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M build/common.gypi
Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index
dbb33a867bfb9abd6aaeb88a542aa69b168c082d..29a3799174f741df61130d0913c2ba90beb4c410
100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -77,6 +77,9 @@
'v8_object_print%': 0,
+ # Turns on compiler optimizations in Debug builds (#defines are
unaffected).
+ 'v8_optimized_debug%': 0,
+
# Enable profiling support. Only required on Windows.
'v8_enable_prof%': 0,
@@ -500,7 +503,6 @@
],
'msvs_settings': {
'VCCLCompilerTool': {
- 'Optimization': '0',
'conditions': [
['OS=="win" and component=="shared_library"', {
@@ -508,6 +510,16 @@
}, {
'RuntimeLibrary': '1', # /MTd
}],
+ ['v8_optimized_debug==1', {
+ 'Optimization': '2',
+ 'InlineFunctionExpansion': '2',
+ 'EnableIntrinsicFunctions': 'true',
+ 'FavorSizeOrSpeed': '0',
+ 'StringPooling': 'true',
+ 'BasicRuntimeChecks': '0',
+ }, {
+ 'Optimization': '0',
+ }],
],
},
'VCLinkerTool': {
@@ -521,6 +533,26 @@
['OS=="linux" or OS=="freebsd" or OS=="openbsd" or
OS=="netbsd"', {
'cflags':
[ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
'-Wnon-virtual-dtor', '-Woverloaded-virtual' ],
+ 'conditions': [
+ ['v8_optimized_debug==1', {
+ 'cflags!': [
+ '-O0',
+ '-O2',
+ '-Os',
+ ],
+ 'cflags': [
+ '-fdata-sections',
+ '-ffunction-sections',
+ '-O3',
+ ],
+ }],
+ ['v8_optimized_debug==1 and gcc_version==44 and clang==0', {
+ 'cflags': [
+ # Avoid crashes with gcc 4.4 in the v8 test suite.
+ '-fno-tree-vrp',
+ ],
+ }],
+ ],
}],
['OS=="linux" and v8_enable_backtrace==1', {
# Support for backtrace_symbols.
@@ -542,7 +574,14 @@
}],
['OS=="mac"', {
'xcode_settings': {
- 'GCC_OPTIMIZATION_LEVEL': '0', # -O0
+ 'conditions': [
+ ['v8_optimized_debug==1', {
+ 'GCC_OPTIMIZATION_LEVEL': '3', # -O3
+ 'GCC_STRICT_ALIASING': 'YES',
+ }, {
+ 'GCC_OPTIMIZATION_LEVEL': '0', # -O0
+ }]
+ ],
},
}],
],
@@ -557,6 +596,7 @@
}],
['OS=="linux" or OS=="freebsd" or OS=="openbsd" or
OS=="netbsd"', {
'cflags!': [
+ '-O0',
'-O2',
'-Os',
],
@@ -576,6 +616,7 @@
}],
['OS=="android"', {
'cflags!': [
+ '-O0',
'-O3',
'-Os',
],
--
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