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Use full anti-dep. breaking with post-ra sched. on the embedded ppc cores.

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Post-RA scheduling gives a significant performance improvement on
the embedded cores, so turn it on. Using full anti-dep. breaking is
important for FP-intensive blocks, so turn it on (just on the
embedded cores for now; this should also be good on the 970s because
post-ra scheduling is all that we have for now, but that should have
more testing first).

llvm-svn: 153843
This commit is contained in:
Hal Finkel 2012-04-01 19:22:57 +00:00
parent fd26145bc6
commit f74994d731
1 changed files with 3 additions and 2 deletions
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5
lib/Target/PowerPC/PPCSubtarget.cpp
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@ -147,9 +147,10 @@ bool PPCSubtarget::enablePostRAScheduler(
TargetSubtargetInfo::AntiDepBreakMode& Mode,
RegClassVector& CriticalPathRCs) const {
if (DarwinDirective == PPC::DIR_440 || DarwinDirective == PPC::DIR_A2)
return false;
Mode = TargetSubtargetInfo::ANTIDEP_ALL;
else
Mode = TargetSubtargetInfo::ANTIDEP_CRITICAL;
Mode = TargetSubtargetInfo::ANTIDEP_CRITICAL;
CriticalPathRCs.clear();
if (isPPC64())