From: Hal Finkel <hfinkel@anl.gov>
Date: Sun, 1 Apr 2012 19:22:57 +0000 (+0000)
Subject: Use full anti-dep. breaking with post-ra sched. on the embedded ppc cores.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=97c9d4c64c870c1eceb1d6264f2457273e6e0738;p=oota-llvm.git

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

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).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153843 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
index fa54a440294..f405b4711a5 100644
--- a/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -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())