Have SPU backend use the external TCE scheduler, if the library is loaded as a

module.

Patch by Pekka Jääskeläinen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138037 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/Target/CellSPU/SPUTargetMachine.cpp b/lib/Target/CellSPU/SPUTargetMachine.cpp
index ea59a80e87..2c7c89eca0 100644
--- a/lib/Target/CellSPU/SPUTargetMachine.cpp
+++ b/lib/Target/CellSPU/SPUTargetMachine.cpp
@@ -17,6 +17,7 @@
 #include "llvm/CodeGen/RegAllocRegistry.h"
 #include "llvm/CodeGen/SchedulerRegistry.h"
 #include "llvm/Target/TargetRegistry.h"
+#include "llvm/Support/DynamicLibrary.h"
 
 using namespace llvm;
 
@@ -59,6 +60,16 @@ bool SPUTargetMachine::addInstSelector(PassManagerBase &PM,
 bool SPUTargetMachine::
 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel) 
 {
+
+  // load the TCE instruction scheduler, if available via
+  // loaded plugins
+  typedef llvm::FunctionPass* (*BuilderFunc)(const char*);
+  BuilderFunc schedulerCreator = 
+      (BuilderFunc)llvm::sys::DynamicLibrary::SearchForAddressOfSymbol(
+          "createTCESchedulerPass");
+  if (schedulerCreator != NULL)
+      PM.add(schedulerCreator("cellspu"));
+
   //align instructions with nops/lnops for dual issue
   PM.add(createSPUNopFillerPass(*this));
   return true;