The DFG should be able to tier-up and OSR enter into the FTL
[WebKit-https.git] / Source / JavaScriptCore / dfg / DFGDriver.cpp
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24  */
25
26 #include "config.h"
27 #include "DFGDriver.h"
28
29 #include "JSObject.h"
30 #include "JSString.h"
31
32 #include "CodeBlock.h"
33 #include "DFGJITCode.h"
34 #include "DFGPlan.h"
35 #include "DFGThunks.h"
36 #include "DFGWorklist.h"
37 #include "JITCode.h"
38 #include "Operations.h"
39 #include "Options.h"
40 #include "SamplingTool.h"
41 #include <wtf/Atomics.h>
42
43 #if ENABLE(FTL_JIT)
44 #include "FTLThunks.h"
45 #endif
46
47 namespace JSC { namespace DFG {
48
49 static unsigned numCompilations;
50
51 unsigned getNumCompilations()
52 {
53     return numCompilations;
54 }
55
56 #if ENABLE(DFG_JIT)
57 static CompilationResult compileImpl(
58     VM& vm, CodeBlock* codeBlock, CompilationMode mode, unsigned osrEntryBytecodeIndex,
59     const Operands<JSValue>& mustHandleValues,
60     PassRefPtr<DeferredCompilationCallback> callback, Worklist* worklist)
61 {
62     SamplingRegion samplingRegion("DFG Compilation (Driver)");
63     
64     numCompilations++;
65     
66     ASSERT(codeBlock);
67     ASSERT(codeBlock->alternative());
68     ASSERT(codeBlock->alternative()->jitType() == JITCode::BaselineJIT);
69     
70     if (!Options::useDFGJIT() || !MacroAssembler::supportsFloatingPoint())
71         return CompilationFailed;
72
73     if (!Options::bytecodeRangeToDFGCompile().isInRange(codeBlock->instructionCount()))
74         return CompilationFailed;
75     
76     if (logCompilationChanges())
77         dataLog("DFG(Driver) compiling ", *codeBlock, " with ", mode, ", number of instructions = ", codeBlock->instructionCount(), "\n");
78     
79     // Make sure that any stubs that the DFG is going to use are initialized. We want to
80     // make sure that al JIT code generation does finalization on the main thread.
81     vm.getCTIStub(osrExitGenerationThunkGenerator);
82     vm.getCTIStub(throwExceptionFromCallSlowPathGenerator);
83     vm.getCTIStub(linkCallThunkGenerator);
84     vm.getCTIStub(linkConstructThunkGenerator);
85     vm.getCTIStub(linkClosureCallThunkGenerator);
86     vm.getCTIStub(virtualCallThunkGenerator);
87     vm.getCTIStub(virtualConstructThunkGenerator);
88 #if ENABLE(FTL_JIT)
89     vm.getCTIStub(FTL::osrExitGenerationThunkGenerator);
90 #endif
91     
92     RefPtr<Plan> plan = adoptRef(
93         new Plan(codeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
94     
95     if (worklist) {
96         plan->callback = callback;
97         if (logCompilationChanges())
98             dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist->queueLength(), ".\n");
99         worklist->enqueue(plan);
100         return CompilationDeferred;
101     }
102     
103     plan->compileInThread(*vm.dfgState);
104     return plan->finalizeWithoutNotifyingCallback();
105 }
106 #else // ENABLE(DFG_JIT)
107 static CompilationResult compileImpl(
108     VM&, CodeBlock*, CompilationMode, unsigned, const Operands<JSValue>&,
109     PassRefPtr<DeferredCompilationCallback>, Worklist*)
110 {
111     return CompilationFailed;
112 }
113 #endif // ENABLE(DFG_JIT)
114
115 CompilationResult compile(
116     VM& vm, CodeBlock* codeBlock, CompilationMode mode, unsigned osrEntryBytecodeIndex,
117     const Operands<JSValue>& mustHandleValues,
118     PassRefPtr<DeferredCompilationCallback> passedCallback, Worklist* worklist)
119 {
120     RefPtr<DeferredCompilationCallback> callback = passedCallback;
121     CompilationResult result = compileImpl(
122         vm, codeBlock, mode, osrEntryBytecodeIndex, mustHandleValues, callback, worklist);
123     if (result != CompilationDeferred)
124         callback->compilationDidComplete(codeBlock, result);
125     return result;
126 }
127
128 } } // namespace JSC::DFG