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Last Comment Bug 710581 - set-but-unused warning in PropertyCache::fullTest withh GCC 4.6
: set-but-unused warning in PropertyCache::fullTest withh GCC 4.6
Product: Core
Classification: Components
Component: JavaScript Engine (show other bugs)
: unspecified
: x86_64 Linux
: -- normal (vote)
: mozilla11
Assigned To: Igor Bukanov
: Jason Orendorff [:jorendorff]
Depends on:
  Show dependency treegraph
Reported: 2011-12-14 04:10 PST by Igor Bukanov
Modified: 2011-12-16 05:58 PST (History)
2 users (show)
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Iteration: ---
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fix (831 bytes, patch)
2011-12-14 04:12 PST, Igor Bukanov
bhackett1024: review+
Details | Diff | Splinter Review

Description Igor Bukanov 2011-12-14 04:10:17 PST
For optimized builds GCC 4.6 reports :

.../js/src/jspropertycache.cpp: In member function ‘JSAtom* js::PropertyCache::fullTest(JSContext*, jsbytecode*, JSObject**, JSObject**, js::PropertyCacheEntry*)’:
/home/igor/m/mc/js/src/jspropertycache.cpp:188:15: warning: unused variable ‘script’ [-Wunused-variable]
Comment 1 Igor Bukanov 2011-12-14 04:12:37 PST
Created attachment 581581 [details] [diff] [review]
Comment 2 Igor Bukanov 2011-12-14 04:21:07 PST
The patch uses explicit #ifdef DEBUG and not DebugOnly<JScript *> script = cx->stack.currentScript(). The right-hand side here is rather complex inline function and contains calls to functions defined in other files. So a compiler most likely will not see that the function does not affect the global state and preserve the call.
Comment 4 :Ms2ger (⌚ UTC+1/+2) 2011-12-16 05:58:40 PST

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