Add getUnrollingPreferences to TTI
Allow targets to customize the default behavior of the generic loop unrolling
transformation. This will be used by the PowerPC backend when targeting the A2
core (which is in-order with a deep pipeline), and using more aggressive
defaults is important.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189565 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/TargetTransformInfo.cpp b/lib/Analysis/TargetTransformInfo.cpp
index 8c6005b..b587ff2 100644
--- a/lib/Analysis/TargetTransformInfo.cpp
+++ b/lib/Analysis/TargetTransformInfo.cpp
@@ -96,6 +96,11 @@
return PrevTTI->isLoweredToCall(F);
}
+bool TargetTransformInfo::getUnrollingPreferences(
+ UnrollingPreferences &UP) const {
+ return PrevTTI->getUnrollingPreferences(UP);
+}
+
bool TargetTransformInfo::isLegalAddImmediate(int64_t Imm) const {
return PrevTTI->isLegalAddImmediate(Imm);
}
@@ -469,6 +474,10 @@
return true;
}
+ virtual bool getUnrollingPreferences(UnrollingPreferences &) const {
+ return false;
+ }
+
bool isLegalAddImmediate(int64_t Imm) const {
return false;
}