#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/ScalarEvolutionExpressions.h"
-#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/ADT/STLExtras.h"
INITIALIZE_PASS_END(IVUsers, "iv-users",
"Induction Variable Users", false, true)
-// IVUsers behavior currently depends on this temporary indvars mode. The
-// option must be defined upstream from its uses.
-namespace llvm {
- bool DisableIVRewrite = false;
-}
-cl::opt<bool, true> DisableIVRewriteOpt(
- "disable-iv-rewrite", cl::Hidden, cl::location(llvm::DisableIVRewrite),
- cl::desc("Disable canonical induction variable rewriting"));
-
Pass *llvm::createIVUsersPass() {
return new IVUsers();
}
if (Width > 64 || (TD && !TD->isLegalInteger(Width)))
return false;
- // We expect Sign/Zero extension to be eliminated from the IR before analyzing
- // any downstream uses.
- if (DisableIVRewrite && (isa<SExtInst>(I) || isa<ZExtInst>(I)))
- return false;
-
if (!Processed.insert(I))
return true; // Instruction already handled.
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Support/CFG.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/Local.h"
STATISTIC(NumElimRem , "Number of IV remainder operations eliminated");
STATISTIC(NumElimCmp , "Number of IV comparisons eliminated");
-// DisableIVRewrite mode currently affects IVUsers, so is defined in libAnalysis
-// and referenced here.
-namespace llvm {
- extern bool DisableIVRewrite;
-}
+static cl::opt<bool> DisableIVRewrite(
+ "disable-iv-rewrite", cl::Hidden,
+ cl::desc("Disable canonical induction variable rewriting"));
namespace {
class IndVarSimplify : public LoopPass {
AU.addRequired<ScalarEvolution>();
AU.addRequiredID(LoopSimplifyID);
AU.addRequiredID(LCSSAID);
- AU.addRequired<IVUsers>();
+ if (!DisableIVRewrite)
+ AU.addRequired<IVUsers>();
AU.addPreserved<ScalarEvolution>();
AU.addPreservedID(LoopSimplifyID);
AU.addPreservedID(LCSSAID);