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Allow targets to specify register classes whose member registers should not be renamed to break anti-dependencies.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86628 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Goodwin
2009-11-10 00:15:47 +00:00
parent 210c5d4880
commit 0855dee564
6 changed files with 37 additions and 11 deletions
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lib/CodeGen/PostRASchedulerList.cpp
+3 -2
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@@ -216,13 +216,14 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
// Check for explicit enable/disable of post-ra scheduling.
TargetSubtarget::AntiDepBreakMode AntiDepMode = TargetSubtarget::ANTIDEP_NONE;
TargetSubtarget::ExcludedRCVector ExcludedRCs;
if (EnablePostRAScheduler.getPosition() > 0) {
if (!EnablePostRAScheduler)
return false;
} else {
// Check that post-RA scheduling is enabled for this target.
const TargetSubtarget &ST = Fn.getTarget().getSubtarget<TargetSubtarget>();
if (!ST.enablePostRAScheduler(OptLevel, AntiDepMode))
if (!ST.enablePostRAScheduler(OptLevel, AntiDepMode, ExcludedRCs))
return false;
}
@@ -243,7 +244,7 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
(ScheduleHazardRecognizer *)new SimpleHazardRecognizer();
AntiDepBreaker *ADB =
((AntiDepMode == TargetSubtarget::ANTIDEP_ALL) ?
(AntiDepBreaker *)new AggressiveAntiDepBreaker(Fn) :
(AntiDepBreaker *)new AggressiveAntiDepBreaker(Fn, ExcludedRCs) :
((AntiDepMode == TargetSubtarget::ANTIDEP_CRITICAL) ?
(AntiDepBreaker *)new CriticalAntiDepBreaker(Fn) : NULL));