MachineScheduler: Export function to construct "default" scheduler.
This makes the createGenericSchedLive() function that constructs the
default scheduler available for the public API. This should help when
you want to get a scheduler and the default list of DAG mutations.
This also shrinks the list of default DAG mutations:
{Load|Store}ClusterDAGMutation and MacroFusionDAGMutation are no longer
added by default. Targets can easily add them if they need them. It also
makes it easier for targets to add alternative/custom macrofusion or
clustering mutations while staying with the default
createGenericSchedLive(). It also saves the callback back and forth in
TargetInstrInfo::enableClusterLoads()/enableClusterStores().
Differential Revision: https://reviews.llvm.org/D26986
llvm-svn: 288057
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index b398702..6eb96a5 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -18,6 +18,7 @@
#include "X86TargetTransformInfo.h"
#include "llvm/CodeGen/GlobalISel/GISelAccessor.h"
#include "llvm/CodeGen/GlobalISel/IRTranslator.h"
+#include "llvm/CodeGen/MachineScheduler.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/IR/Function.h"
@@ -284,6 +285,13 @@
return getTM<X86TargetMachine>();
}
+ ScheduleDAGInstrs *
+ createMachineScheduler(MachineSchedContext *C) const override {
+ ScheduleDAGMILive *DAG = createGenericSchedLive(C);
+ DAG->addMutation(createMacroFusionDAGMutation(DAG->TII));
+ return DAG;
+ }
+
void addIRPasses() override;
bool addInstSelector() override;
#ifdef LLVM_BUILD_GLOBAL_ISEL