Bug 182389 – -Wreturn-type warning in DFGObjectAllocationSinkingPhase.cpp

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Michael Catanzaro]

-Wreturn-type warning in DFGObjectAllocationSinkingPhase.cpp:

[1296/3695] Building CXX object Source.../unified-sources/UnifiedSource48.cpp.o
In file included from DerivedSources/JavaScriptCore/unified-sources/UnifiedSource48.cpp:2:0:
../../Source/JavaScriptCore/dfg/DFGObjectAllocationSinkingPhase.cpp: In member function ‘JSC::DFG::Node* JSC::DFG::{anonymous}::ObjectAllocationSinkingPhase::createRecovery(JSC::DFG::BasicBlock*, JSC::DFG::PromotedHeapLocation, JSC::DFG::Node*, bool&)’:
../../Source/JavaScriptCore/dfg/DFGObjectAllocationSinkingPhase.cpp:2336:5: warning: control reaches end of non-void function [-Wreturn-type]
     }
     ^

[Michael Catanzaro]

Created attachment 332878 [details]
Patch

[Michael Catanzaro]

Comment on attachment 332878 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=332878&action=review

> Source/JavaScriptCore/dfg/DFGObjectAllocationSinkingPhase.cpp:-1535
> -            break;

I dunno why these breaks were here, but they're right after return statements, so they can never be reached.

It's unrelated to the warning; I can leave them if this is considered desirable code style.

> Source/JavaScriptCore/dfg/DFGObjectAllocationSinkingPhase.cpp:2329
>              DFG_CRASH(m_graph, base, "Bad location kind");
>              break;

Could get rid of this break, too.

> Source/JavaScriptCore/dfg/DFGObjectAllocationSinkingPhase.cpp:2332
> +        RELEASE_ASSERT_NOT_REACHED();

This is what's actually needed to silence the warning.

[Michael Catanzaro]

(In reply to Michael Catanzaro from comment #2)
> This is what's actually needed to silence the warning.

Alternative would be to move the DFG_CRASH() down out of the switch case, but I figure it's a bit more clear this way.

[Yusuke Suzuki]

Comment on attachment 332878 [details]
Patch

r=me

[WebKit Commit Bot]

Comment on attachment 332878 [details]
Patch

Clearing flags on attachment: 332878

Committed r227970: <https://trac.webkit.org/changeset/227970>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/37118957>