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Instead of emitting a JIT stub that looks like this: internal void %l1_main_entry_2E_ce_wrapper(int) { header: %resolver = call sbyte* %getPointerToNamedFunction( sbyte* getelementptr ([20 x sbyte]* %l1_main_entry_2E_ce_name, int 0, int 0) ) ; <sbyte*> [#uses=1] %resolverCast = cast sbyte* %resolver to void (int)* ; <void (int)*> [#uses=1] call void %resolverCast( int %0 ) ret void } Emit one that looks like this: internal void %l1_main_entry_2E_ce_wrapper(int) { Entry: %fpcache = load void (int)** %l1_main_entry_2E_ce.fpcache ; <void (int)*> [#uses=2] %isNull = seteq void (int)* %fpcache, null ; <bool> [#uses=1] br bool %isNull, label %lookupfp, label %usecache usecache: ; preds = %lookupfp, %Entry %fp = phi void (int)* [ %resolverCast, %lookupfp ], [ %fpcache, %Entry ] ; <void (int)*> [#uses=1] call void %fp( int %0 ) ret void lookupfp: ; preds = %Entry %resolver = call sbyte* %getPointerToNamedFunction( sbyte* getelementptr ([20 x sbyte]* %l1_main_entry_2E_ce_name, int 0, int 0) ) ; <sbyte*> [#uses=1] %resolverCast = cast sbyte* %resolver to void (int)* ; <void (int)*> [#uses=2] store void (int)* %resolverCast, void (int)** %l1_main_entry_2E_ce.fpcache br label %usecache } This makes the JIT debugger *MUCH* faster on large programs, as getPointerToNamedFunction takes time linear with the size of the program, and before we would call it every time a function in the text module was called from the safe module (ouch!). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22387 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
BugDriver.cpp | ||
BugDriver.h | ||
bugpoint.cpp | ||
CrashDebugger.cpp | ||
ExecutionDriver.cpp | ||
ExtractFunction.cpp | ||
ListReducer.h | ||
Makefile | ||
Miscompilation.cpp | ||
OptimizerDriver.cpp | ||
TestPasses.cpp | ||
ToolRunner.cpp | ||
ToolRunner.h |