[PATCH] Extend the statepoint intrinsic to allow statepoints to be marked as transitions from GC-aware code to code that is not GC-aware.

[Pat Gavlin]

Added a test for GC transition lowering.


http://reviews.llvm.org/D9501

Files:
  docs/Statepoints.rst
  include/llvm/CodeGen/ISDOpcodes.h
  include/llvm/IR/Statepoint.h
  lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
  lib/CodeGen/SelectionDAG/StatepointLowering.cpp
  lib/IR/IRBuilder.cpp
  lib/IR/Verifier.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  lib/Transforms/Scalar/PlaceSafepoints.cpp
  test/Analysis/ValueTracking/memory-dereferenceable.ll
  test/CodeGen/Generic/overloaded-intrinsic-name.ll
  test/CodeGen/X86/statepoint-allocas.ll
  test/CodeGen/X86/statepoint-call-lowering.ll
  test/CodeGen/X86/statepoint-forward.ll
  test/CodeGen/X86/statepoint-gctransition-call-lowering.ll
  test/CodeGen/X86/statepoint-invoke.ll
  test/CodeGen/X86/statepoint-stack-usage.ll
  test/CodeGen/X86/statepoint-stackmap-format.ll
  test/Transforms/CodeGenPrepare/statepoint-relocate.ll
  test/Transforms/InstCombine/gc.relocate.ll
  test/Transforms/InstCombine/statepoint.ll
  test/Transforms/PlaceSafepoints/basic.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-1.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-10.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-2.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-3.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-4.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-5.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-6.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-7.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-8.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers-9.ll
  test/Transforms/RewriteStatepointsForGC/base-pointers.ll
  test/Transforms/RewriteStatepointsForGC/basics.ll
  test/Transforms/RewriteStatepointsForGC/constants.ll
  test/Transforms/RewriteStatepointsForGC/live-vector.ll
  test/Transforms/RewriteStatepointsForGC/liveness-basics.ll
  test/Transforms/RewriteStatepointsForGC/preprocess.ll
  test/Transforms/RewriteStatepointsForGC/relocate_invoke_result.ll
  test/Transforms/RewriteStatepointsForGC/relocation.ll
  test/Verifier/invalid-statepoint2.ll
  test/Verifier/statepoint.ll

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