misched: Allow subtargets to enable misched and dependent options.
This allows me to begin enabling (or backing out) misched by default
for one subtarget at a time. To run misched we typically want to:
- Disable SelectionDAG scheduling (use the source order scheduler)
- Enable more aggressive coalescing (until we decide to always run the coalescer this way)
- Enable MachineScheduler pass itself.
Disabling PostRA sched may follow for some subtargets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167826 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 4ea21d4..ee6e283 100644
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -22,6 +22,7 @@
#include "llvm/CodeGen/RegAllocRegistry.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Support/CommandLine.h"
@@ -241,7 +242,9 @@
disablePass(&EarlyIfConverterID);
// Temporarily disable experimental passes.
- substitutePass(&MachineSchedulerID, 0);
+ const TargetSubtargetInfo &ST = TM->getSubtarget<TargetSubtargetInfo>();
+ if (!ST.enableMachineScheduler())
+ disablePass(&MachineSchedulerID);
}
/// Insert InsertedPassID pass after TargetPassID.