Do not count DbgInfoIntrinsic while estimating loop header size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66245 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopRotation.cpp b/lib/Transforms/Scalar/LoopRotation.cpp
index 65b74b4..a088230 100644
--- a/lib/Transforms/Scalar/LoopRotation.cpp
+++ b/lib/Transforms/Scalar/LoopRotation.cpp
@@ -14,7 +14,7 @@
#define DEBUG_TYPE "loop-rotate"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Function.h"
-#include "llvm/Instructions.h"
+#include "llvm/IntrinsicInst.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/Dominators.h"
@@ -161,7 +161,19 @@
// Check size of original header and reject
// loop if it is very big.
- if (OrigHeader->size() > MAX_HEADER_SIZE)
+ unsigned Size = 0;
+
+ // FIXME: Use common api to estimate size.
+ for (BasicBlock::const_iterator OI = OrigHeader->begin(),
+ OE = OrigHeader->end(); OI != OE; ++OI) {
+ if (isa<PHINode>(OI))
+ continue; // PHI nodes don't count.
+ if (isa<DbgInfoIntrinsic>(OI))
+ continue; // Debug intrinsics don't count as size.
+ Size++;
+ }
+
+ if (Size > MAX_HEADER_SIZE)
return false;
// Now, this loop is suitable for rotation.