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llvm-project/llvm/lib/Transforms
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Philip Reames e73300b925 [RewriteStatepointsForGC] Move an expensive debugging check to XDEBUG 
The check in question is attempting to help find cases where we haven't relocated a pointer at a safepoint we should have.  It does this by coercing the value to null at any safepoint which doesn't relocate it.  

Unfortunately, this turns out to be rather expensive in terms of memory usage and time.  The number of stores inserted can grow with O(number of values x number of statepoints).  On at least one example I looked at, over half of peak memory usage was coming from this check.  

With this change, the check is no longer enabled by default in Asserts builds.  It is enabled for expensive asserts builds and has a command line option to enable it in both Asserts and non-Asserts builds.  

llvm-svn: 234761
 		2015-04-13 16:41:32 +00:00
..
Hello [CMake] Add LLVM_LINK_COMPONENTS to loadable modules, LLVMHello and BugpointPasses, on Win32. 2014-07-13 13:36:48 +00:00
IPO [CallSite] Make construction from Value* (or Instruction*) explicit. 2015-04-10 14:50:08 +00:00
InstCombine [InstCombine][CodeGenPrep] Create llvm.uadd.with.overflow in CGP. 2015-04-10 21:07:09 +00:00
Instrumentation Mark empty default constructors as =default if it makes the type POD 2015-04-11 18:57:14 +00:00
ObjCARC Remove empty non-virtual destructors or mark them =default when non-public 2015-04-11 15:32:26 +00:00
Scalar [RewriteStatepointsForGC] Move an expensive debugging check to XDEBUG 2015-04-13 16:41:32 +00:00
Utils Fix typo. 2015-04-12 18:18:51 +00:00
Vectorize Reduce dyn_cast<> to isa<> or cast<> where possible. 2015-04-10 11:24:51 +00:00
CMakeLists.txt Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer. 2013-01-28 01:35:51 +00:00
LLVMBuild.txt Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer. 2013-01-28 01:35:51 +00:00
Makefile Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer. 2013-01-28 01:35:51 +00:00