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Add a subtarget hook: enablePostMachineScheduler.

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As requested by AArch64 subtargets.

Note that this will have no effect until the
AArch64 target actually enables the pass like this:
substitutePass(&PostRASchedulerID, &PostMachineSchedulerID);

As soon as armv7 switches over, PostMachineScheduler will become the
default postRA scheduler, so this won't be necessary any more.
Targets using the old postRA schedule would then do:
substitutePass(&PostMachineSchedulerID, &PostRASchedulerID);

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210167 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2014-06-04 07:06:27 +00:00
parent 0c83424556
commit 5f22dd7858
6 changed files with 30 additions and 3 deletions
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lib/CodeGen/MachineScheduler.cpp
+6
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@@ -333,6 +333,12 @@ bool PostMachineScheduler::runOnMachineFunction(MachineFunction &mf) {
if (skipOptnoneFunction(*mf.getFunction()))
return false;
const TargetSubtargetInfo &ST =
mf.getTarget().getSubtarget<TargetSubtargetInfo>();
if (!ST.enablePostMachineScheduler()) {
DEBUG(dbgs() << "Subtarget disables post-MI-sched.\n");
return false;
}
DEBUG(dbgs() << "Before post-MI-sched:\n"; mf.print(dbgs()));
// Initialize the context of the pass.