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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/Passes.cpp
+3 -3
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@@ -92,9 +92,9 @@ PrintMachineInstrs("print-machineinstrs", cl::ValueOptional,
// Temporary option to allow experimenting with MachineScheduler as a post-RA
// scheduler. Targets can "properly" enable this with
// substitutePass(&PostRASchedulerID, &MachineSchedulerID); Ideally it wouldn't
// be part of the standard pass pipeline, and the target would just add a PostRA
// scheduling pass wherever it wants.
// substitutePass(&PostRASchedulerID, &PostMachineSchedulerID); Ideally it
// wouldn't be part of the standard pass pipeline, and the target would just add
// a PostRA scheduling pass wherever it wants.
static cl::opt<bool> MISchedPostRA("misched-postra", cl::Hidden,
cl::desc("Run MachineScheduler post regalloc (independent of preRA sched)"));