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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/194858">194858</a></dd>
<dt>Author</dt> <dd>ossy@webkit.org</dd>
<dt>Date</dt> <dd>2016-01-11 10:13:36 -0800 (Mon, 11 Jan 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>[B3] Fix control reaches end of non-void function GCC warnings on Linux
https://bugs.webkit.org/show_bug.cgi?id=152887

Reviewed by Mark Lam.

* b3/B3LowerToAir.cpp:
(JSC::B3::Air::LowerToAir::createBranch):
(JSC::B3::Air::LowerToAir::createCompare):
(JSC::B3::Air::LowerToAir::createSelect):
* b3/B3Type.h:
(JSC::B3::sizeofType):
* b3/air/AirArg.cpp:
(JSC::B3::Air::Arg::isRepresentableAs):
* b3/air/AirArg.h:
(JSC::B3::Air::Arg::isAnyUse):
(JSC::B3::Air::Arg::isColdUse):
(JSC::B3::Air::Arg::isEarlyUse):
(JSC::B3::Air::Arg::isLateUse):
(JSC::B3::Air::Arg::isAnyDef):
(JSC::B3::Air::Arg::isEarlyDef):
(JSC::B3::Air::Arg::isLateDef):
(JSC::B3::Air::Arg::isZDef):
(JSC::B3::Air::Arg::widthForB3Type):
(JSC::B3::Air::Arg::isGP):
(JSC::B3::Air::Arg::isFP):
(JSC::B3::Air::Arg::isType):
(JSC::B3::Air::Arg::isValidForm):
* b3/air/AirCode.h:
(JSC::B3::Air::Code::newTmp):
(JSC::B3::Air::Code::numTmps):</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreb3B3LowerToAircpp">trunk/Source/JavaScriptCore/b3/B3LowerToAir.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreb3B3Typeh">trunk/Source/JavaScriptCore/b3/B3Type.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreb3airAirArgcpp">trunk/Source/JavaScriptCore/b3/air/AirArg.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreb3airAirArgh">trunk/Source/JavaScriptCore/b3/air/AirArg.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreb3airAirCodeh">trunk/Source/JavaScriptCore/b3/air/AirCode.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (194857 => 194858)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog        2016-01-11 17:39:25 UTC (rev 194857)
+++ trunk/Source/JavaScriptCore/ChangeLog        2016-01-11 18:13:36 UTC (rev 194858)
</span><span class="lines">@@ -1,3 +1,36 @@
</span><ins>+2016-01-11  Csaba Osztrogonác  &lt;ossy@webkit.org&gt;
+
+        [B3] Fix control reaches end of non-void function GCC warnings on Linux
+        https://bugs.webkit.org/show_bug.cgi?id=152887
+
+        Reviewed by Mark Lam.
+
+        * b3/B3LowerToAir.cpp:
+        (JSC::B3::Air::LowerToAir::createBranch):
+        (JSC::B3::Air::LowerToAir::createCompare):
+        (JSC::B3::Air::LowerToAir::createSelect):
+        * b3/B3Type.h:
+        (JSC::B3::sizeofType):
+        * b3/air/AirArg.cpp:
+        (JSC::B3::Air::Arg::isRepresentableAs):
+        * b3/air/AirArg.h:
+        (JSC::B3::Air::Arg::isAnyUse):
+        (JSC::B3::Air::Arg::isColdUse):
+        (JSC::B3::Air::Arg::isEarlyUse):
+        (JSC::B3::Air::Arg::isLateUse):
+        (JSC::B3::Air::Arg::isAnyDef):
+        (JSC::B3::Air::Arg::isEarlyDef):
+        (JSC::B3::Air::Arg::isLateDef):
+        (JSC::B3::Air::Arg::isZDef):
+        (JSC::B3::Air::Arg::widthForB3Type):
+        (JSC::B3::Air::Arg::isGP):
+        (JSC::B3::Air::Arg::isFP):
+        (JSC::B3::Air::Arg::isType):
+        (JSC::B3::Air::Arg::isValidForm):
+        * b3/air/AirCode.h:
+        (JSC::B3::Air::Code::newTmp):
+        (JSC::B3::Air::Code::numTmps):
+
</ins><span class="cx"> 2016-01-11  Filip Pizlo  &lt;fpizlo@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Make it easier to introduce exotic instructions to Air
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreb3B3LowerToAircpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/b3/B3LowerToAir.cpp (194857 => 194858)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/b3/B3LowerToAir.cpp        2016-01-11 17:39:25 UTC (rev 194857)
+++ trunk/Source/JavaScriptCore/b3/B3LowerToAir.cpp        2016-01-11 18:13:36 UTC (rev 194858)
</span><span class="lines">@@ -52,6 +52,11 @@
</span><span class="cx"> #include &quot;B3ValueInlines.h&quot;
</span><span class="cx"> #include &lt;wtf/ListDump.h&gt;
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored &quot;-Wreturn-type&quot;
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> namespace JSC { namespace B3 {
</span><span class="cx"> 
</span><span class="cx"> using namespace Air;
</span><span class="lines">@@ -1338,6 +1343,7 @@
</span><span class="cx">                     }
</span><span class="cx">                     return Inst();
</span><span class="cx">                 }
</span><ins>+                ASSERT_NOT_REACHED();
</ins><span class="cx">             },
</span><span class="cx">             [this] (
</span><span class="cx">                 Arg::Width width, const Arg&amp; resCond,
</span><span class="lines">@@ -1367,6 +1373,7 @@
</span><span class="cx">                     }
</span><span class="cx">                     return Inst();
</span><span class="cx">                 }
</span><ins>+                ASSERT_NOT_REACHED();
</ins><span class="cx">             },
</span><span class="cx">             [this] (Arg doubleCond, const ArgPromise&amp; left, const ArgPromise&amp; right) -&gt; Inst {
</span><span class="cx">                 if (isValidForm(BranchDouble, Arg::DoubleCond, left.kind(), right.kind())) {
</span><span class="lines">@@ -1413,6 +1420,7 @@
</span><span class="cx">                     }
</span><span class="cx">                     return Inst();
</span><span class="cx">                 }
</span><ins>+                ASSERT_NOT_REACHED();
</ins><span class="cx">             },
</span><span class="cx">             [this] (
</span><span class="cx">                 Arg::Width width, const Arg&amp; resCond,
</span><span class="lines">@@ -1436,6 +1444,7 @@
</span><span class="cx">                     }
</span><span class="cx">                     return Inst();
</span><span class="cx">                 }
</span><ins>+                ASSERT_NOT_REACHED();
</ins><span class="cx">             },
</span><span class="cx">             [this] (const Arg&amp; doubleCond, const ArgPromise&amp; left, const ArgPromise&amp; right) -&gt; Inst {
</span><span class="cx">                 if (isValidForm(CompareDouble, Arg::DoubleCond, left.kind(), right.kind(), Arg::Tmp)) {
</span><span class="lines">@@ -1495,6 +1504,7 @@
</span><span class="cx">                     }
</span><span class="cx">                     return Inst();
</span><span class="cx">                 }
</span><ins>+                ASSERT_NOT_REACHED();
</ins><span class="cx">             },
</span><span class="cx">             [&amp;] (
</span><span class="cx">                 Arg::Width width, const Arg&amp; resCond,
</span><span class="lines">@@ -1521,6 +1531,7 @@
</span><span class="cx">                     }
</span><span class="cx">                     return Inst();
</span><span class="cx">                 }
</span><ins>+                ASSERT_NOT_REACHED();
</ins><span class="cx">             },
</span><span class="cx">             [&amp;] (Arg doubleCond, const ArgPromise&amp; left, const ArgPromise&amp; right) -&gt; Inst {
</span><span class="cx">                 if (isValidForm(config.moveConditionallyDouble, Arg::DoubleCond, left.kind(), right.kind(), Arg::Tmp, Arg::Tmp)) {
</span><span class="lines">@@ -2298,5 +2309,8 @@
</span><span class="cx"> 
</span><span class="cx"> } } // namespace JSC::B3
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic pop
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> #endif // ENABLE(B3_JIT)
</span><del>-
</del></span></pre></div>
<a id="trunkSourceJavaScriptCoreb3B3Typeh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/b3/B3Type.h (194857 => 194858)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/b3/B3Type.h        2016-01-11 17:39:25 UTC (rev 194857)
+++ trunk/Source/JavaScriptCore/b3/B3Type.h        2016-01-11 18:13:36 UTC (rev 194858)
</span><span class="lines">@@ -31,6 +31,11 @@
</span><span class="cx"> #include &quot;B3Common.h&quot;
</span><span class="cx"> #include &lt;wtf/StdLibExtras.h&gt;
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored &quot;-Wreturn-type&quot;
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> namespace JSC { namespace B3 {
</span><span class="cx"> 
</span><span class="cx"> enum Type : int8_t {
</span><span class="lines">@@ -70,6 +75,7 @@
</span><span class="cx">     case Double:
</span><span class="cx">         return 8;
</span><span class="cx">     }
</span><ins>+    ASSERT_NOT_REACHED();
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> } } // namespace JSC::B3
</span><span class="lines">@@ -82,7 +88,10 @@
</span><span class="cx"> 
</span><span class="cx"> } // namespace WTF
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic pop
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> #endif // ENABLE(B3_JIT)
</span><span class="cx"> 
</span><span class="cx"> #endif // B3Type_h
</span><del>-
</del></span></pre></div>
<a id="trunkSourceJavaScriptCoreb3airAirArgcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/b3/air/AirArg.cpp (194857 => 194858)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/b3/air/AirArg.cpp        2016-01-11 17:39:25 UTC (rev 194857)
+++ trunk/Source/JavaScriptCore/b3/air/AirArg.cpp        2016-01-11 18:13:36 UTC (rev 194858)
</span><span class="lines">@@ -31,6 +31,11 @@
</span><span class="cx"> #include &quot;AirSpecial.h&quot;
</span><span class="cx"> #include &quot;AirStackSlot.h&quot;
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored &quot;-Wreturn-type&quot;
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> namespace JSC { namespace B3 { namespace Air {
</span><span class="cx"> 
</span><span class="cx"> bool Arg::isRepresentableAs(Width width, Signedness signedness) const
</span><span class="lines">@@ -59,6 +64,7 @@
</span><span class="cx">             return isRepresentableAs&lt;uint64_t&gt;();
</span><span class="cx">         }
</span><span class="cx">     }
</span><ins>+    ASSERT_NOT_REACHED();
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void Arg::dump(PrintStream&amp; out) const
</span><span class="lines">@@ -257,4 +263,8 @@
</span><span class="cx"> 
</span><span class="cx"> } // namespace WTF
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic pop
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> #endif // ENABLE(B3_JIT)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreb3airAirArgh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/b3/air/AirArg.h (194857 => 194858)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/b3/air/AirArg.h        2016-01-11 17:39:25 UTC (rev 194857)
+++ trunk/Source/JavaScriptCore/b3/air/AirArg.h        2016-01-11 18:13:36 UTC (rev 194858)
</span><span class="lines">@@ -33,6 +33,11 @@
</span><span class="cx"> #include &quot;B3Type.h&quot;
</span><span class="cx"> #include &lt;wtf/Optional.h&gt;
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored &quot;-Wreturn-type&quot;
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> namespace JSC { namespace B3 { namespace Air {
</span><span class="cx"> 
</span><span class="cx"> class Special;
</span><span class="lines">@@ -194,6 +199,7 @@
</span><span class="cx">         case EarlyDef:
</span><span class="cx">             return false;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     static bool isColdUse(Role role)
</span><span class="lines">@@ -213,6 +219,7 @@
</span><span class="cx">         case EarlyDef:
</span><span class="cx">             return false;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     static bool isWarmUse(Role role)
</span><span class="lines">@@ -238,6 +245,7 @@
</span><span class="cx">         case EarlyDef:
</span><span class="cx">             return false;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Returns true if the Role implies that the Inst will Use the Arg after doing everything else.
</span><span class="lines">@@ -258,6 +266,7 @@
</span><span class="cx">         case EarlyDef:
</span><span class="cx">             return false;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Returns true if the Role implies that the Inst will Def the Arg.
</span><span class="lines">@@ -278,6 +287,7 @@
</span><span class="cx">         case Scratch:
</span><span class="cx">             return true;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Returns true if the Role implies that the Inst will Def the Arg before start of execution.
</span><span class="lines">@@ -298,6 +308,7 @@
</span><span class="cx">         case Scratch:
</span><span class="cx">             return true;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Returns true if the Role implies that the Inst will Def the Arg after the end of execution.
</span><span class="lines">@@ -318,6 +329,7 @@
</span><span class="cx">         case UseZDef:
</span><span class="cx">             return true;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Returns true if the Role implies that the Inst will ZDef the Arg.
</span><span class="lines">@@ -338,6 +350,7 @@
</span><span class="cx">         case UseZDef:
</span><span class="cx">             return true;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     static Type typeForB3Type(B3::Type type)
</span><span class="lines">@@ -370,6 +383,7 @@
</span><span class="cx">         case Double:
</span><span class="cx">             return Width64;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     static Width conservativeWidth(Type type)
</span><span class="lines">@@ -760,6 +774,7 @@
</span><span class="cx">         case Invalid:
</span><span class="cx">             return false;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Tells us if this Arg can be used in a position that requires a FP value.
</span><span class="lines">@@ -782,6 +797,7 @@
</span><span class="cx">         case Tmp:
</span><span class="cx">             return isFPTmp();
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     bool hasType() const
</span><span class="lines">@@ -810,6 +826,7 @@
</span><span class="cx">         case FP:
</span><span class="cx">             return isFP();
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     bool isGPR() const
</span><span class="lines">@@ -955,6 +972,7 @@
</span><span class="cx">         case Special:
</span><span class="cx">             return true;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     template&lt;typename Functor&gt;
</span><span class="lines">@@ -1161,6 +1179,10 @@
</span><span class="cx"> 
</span><span class="cx"> } // namespace WTF
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic pop
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> #endif // ENABLE(B3_JIT)
</span><span class="cx"> 
</span><span class="cx"> #endif // AirArg_h
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreb3airAirCodeh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/b3/air/AirCode.h (194857 => 194858)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/b3/air/AirCode.h        2016-01-11 17:39:25 UTC (rev 194857)
+++ trunk/Source/JavaScriptCore/b3/air/AirCode.h        2016-01-11 18:13:36 UTC (rev 194858)
</span><span class="lines">@@ -39,6 +39,11 @@
</span><span class="cx"> 
</span><span class="cx"> class Procedure;
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored &quot;-Wreturn-type&quot;
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> namespace Air {
</span><span class="cx"> 
</span><span class="cx"> class CCallSpecial;
</span><span class="lines">@@ -76,6 +81,7 @@
</span><span class="cx">         case Arg::FP:
</span><span class="cx">             return Tmp::fpTmpForIndex(m_numFPTmps++);
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     unsigned numTmps(Arg::Type type)
</span><span class="lines">@@ -86,6 +92,7 @@
</span><span class="cx">         case Arg::FP:
</span><span class="cx">             return m_numFPTmps;
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     unsigned callArgAreaSize() const { return m_callArgAreaSize; }
</span><span class="lines">@@ -335,6 +342,10 @@
</span><span class="cx"> 
</span><span class="cx"> } } } // namespace JSC::B3::Air
</span><span class="cx"> 
</span><ins>+#if COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+#pragma GCC diagnostic pop
+#endif // COMPILER(GCC) &amp;&amp; ASSERT_DISABLED
+
</ins><span class="cx"> #endif // ENABLE(B3_JIT)
</span><span class="cx"> 
</span><span class="cx"> #endif // AirCode_h
</span></span></pre>
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