From: Kalle Raiskila <kalle.raiskila@nokia.com>
Date: Fri, 19 Aug 2011 10:50:24 +0000 (+0000)
Subject: Have SPU backend use the external TCE scheduler, if the library is loaded as a
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=67a9b1fcc797e923ad610e741e5ef3ea6b7aabf2;p=oota-llvm.git

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
---

diff --git a/lib/Target/CellSPU/SPUTargetMachine.cpp b/lib/Target/CellSPU/SPUTargetMachine.cpp
index ea59a80e870..2c7c89eca04 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;