[HardwareLoops] NFC - move loop with irreducible control flow checking logic to isHardwareLoopProfitable()

llvm-svn: 364397

1 files changed, 9 insertions, 1 deletions

diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp
index 8f729dbfb73..5fde3443457 100644
--- a/llvm/lib/Analysis/TargetTransformInfo.cpp
+++ b/llvm/lib/Analysis/TargetTransformInfo.cpp
@@ -18,6 +18,8 @@
 #include "llvm/IR/PatternMatch.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Analysis/CFG.h"
+#include "llvm/Analysis/LoopIterator.h"
 #include <utility>
 
 using namespace llvm;
@@ -216,8 +218,14 @@ bool TargetTransformInfo::isLoweredToCall(const Function *F) const {
 }
 
 bool TargetTransformInfo::isHardwareLoopProfitable(
-  Loop *L, ScalarEvolution &SE, AssumptionCache &AC,
+  Loop *L, LoopInfo &LI, ScalarEvolution &SE, AssumptionCache &AC,
   TargetLibraryInfo *LibInfo, HardwareLoopInfo &HWLoopInfo) const {
+  // If the loop has irreducible control flow, it can not be converted to
+  // Hardware loop.
+  LoopBlocksRPO RPOT(L);  
+  RPOT.perform(&LI);
+  if (containsIrreducibleCFG<const BasicBlock *>(RPOT, LI))
+    return false;
   return TTIImpl->isHardwareLoopProfitable(L, SE, AC, LibInfo, HWLoopInfo);
 }