Constify arguments to methods in LICM. NFC
llvm-svn: 237227
diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp
index 760ce77..1ac15fa 100644
--- a/llvm/lib/Transforms/Scalar/LICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LICM.cpp
@@ -72,21 +72,25 @@
cl::desc("Disable memory promotion in LICM pass"));
static bool inSubLoop(BasicBlock *BB, Loop *CurLoop, LoopInfo *LI);
-static bool isNotUsedInLoop(Instruction &I, Loop *CurLoop);
+static bool isNotUsedInLoop(const Instruction &I, const Loop *CurLoop);
static bool hoist(Instruction &I, BasicBlock *Preheader);
-static bool sink(Instruction &I, LoopInfo *LI, DominatorTree *DT,
- Loop *CurLoop, AliasSetTracker *CurAST );
-static bool isGuaranteedToExecute(Instruction &Inst, DominatorTree *DT,
- Loop *CurLoop, LICMSafetyInfo *SafetyInfo);
-static bool isSafeToExecuteUnconditionally(Instruction &Inst, DominatorTree *DT,
- Loop *CurLoop,
- LICMSafetyInfo *SafetyInfo);
+static bool sink(Instruction &I, const LoopInfo *LI, const DominatorTree *DT,
+ const Loop *CurLoop, AliasSetTracker *CurAST );
+static bool isGuaranteedToExecute(const Instruction &Inst,
+ const DominatorTree *DT,
+ const Loop *CurLoop,
+ const LICMSafetyInfo *SafetyInfo);
+static bool isSafeToExecuteUnconditionally(const Instruction &Inst,
+ const DominatorTree *DT,
+ const Loop *CurLoop,
+ const LICMSafetyInfo *SafetyInfo);
static bool pointerInvalidatedByLoop(Value *V, uint64_t Size,
const AAMDNodes &AAInfo,
AliasSetTracker *CurAST);
-static Instruction *CloneInstructionInExitBlock(Instruction &I,
+static Instruction *CloneInstructionInExitBlock(const Instruction &I,
BasicBlock &ExitBlock,
- PHINode &PN, LoopInfo *LI);
+ PHINode &PN,
+ const LoopInfo *LI);
static bool canSinkOrHoistInst(Instruction &I, AliasAnalysis *AA,
DominatorTree *DT, Loop *CurLoop,
AliasSetTracker *CurAST,
@@ -502,10 +506,10 @@
/// the loop. If this is true, we can sink the instruction to the exit
/// blocks of the loop.
///
-static bool isNotUsedInLoop(Instruction &I, Loop *CurLoop) {
- for (User *U : I.users()) {
- Instruction *UI = cast<Instruction>(U);
- if (PHINode *PN = dyn_cast<PHINode>(UI)) {
+static bool isNotUsedInLoop(const Instruction &I, const Loop *CurLoop) {
+ for (const User *U : I.users()) {
+ const Instruction *UI = cast<Instruction>(U);
+ if (const PHINode *PN = dyn_cast<PHINode>(UI)) {
// A PHI node where all of the incoming values are this instruction are
// special -- they can just be RAUW'ed with the instruction and thus
// don't require a use in the predecessor. This is a particular important
@@ -533,9 +537,10 @@
return true;
}
-static Instruction *CloneInstructionInExitBlock(Instruction &I,
+static Instruction *CloneInstructionInExitBlock(const Instruction &I,
BasicBlock &ExitBlock,
- PHINode &PN, LoopInfo *LI) {
+ PHINode &PN,
+ const LoopInfo *LI) {
Instruction *New = I.clone();
ExitBlock.getInstList().insert(ExitBlock.getFirstInsertionPt(), New);
if (!I.getName().empty()) New->setName(I.getName() + ".le");
@@ -567,8 +572,8 @@
/// This method is guaranteed to remove the original instruction from its
/// position, and may either delete it or move it to outside of the loop.
///
-static bool sink(Instruction &I, LoopInfo *LI, DominatorTree *DT,
- Loop *CurLoop, AliasSetTracker *CurAST ) {
+static bool sink(Instruction &I, const LoopInfo *LI, const DominatorTree *DT,
+ const Loop *CurLoop, AliasSetTracker *CurAST ) {
DEBUG(dbgs() << "LICM sinking instruction: " << I << "\n");
bool Changed = false;
if (isa<LoadInst>(I)) ++NumMovedLoads;
@@ -637,9 +642,10 @@
/// Only sink or hoist an instruction if it is not a trapping instruction
/// or if it is a trapping instruction and is guaranteed to execute.
///
-static bool isSafeToExecuteUnconditionally(Instruction &Inst, DominatorTree *DT,
- Loop *CurLoop,
- LICMSafetyInfo *SafetyInfo) {
+static bool isSafeToExecuteUnconditionally(const Instruction &Inst,
+ const DominatorTree *DT,
+ const Loop *CurLoop,
+ const LICMSafetyInfo *SafetyInfo) {
// If it is not a trapping instruction, it is always safe to hoist.
if (isSafeToSpeculativelyExecute(&Inst))
return true;
@@ -647,8 +653,10 @@
return isGuaranteedToExecute(Inst, DT, CurLoop, SafetyInfo);
}
-static bool isGuaranteedToExecute(Instruction &Inst, DominatorTree *DT,
- Loop *CurLoop, LICMSafetyInfo * SafetyInfo) {
+static bool isGuaranteedToExecute(const Instruction &Inst,
+ const DominatorTree *DT,
+ const Loop *CurLoop,
+ const LICMSafetyInfo * SafetyInfo) {
// We have to check to make sure that the instruction dominates all
// of the exit blocks. If it doesn't, then there is a path out of the loop
@@ -840,11 +848,11 @@
// If there is an non-load/store instruction in the loop, we can't promote
// it.
- if (LoadInst *load = dyn_cast<LoadInst>(UI)) {
+ if (const LoadInst *load = dyn_cast<LoadInst>(UI)) {
assert(!load->isVolatile() && "AST broken");
if (!load->isSimple())
return Changed;
- } else if (StoreInst *store = dyn_cast<StoreInst>(UI)) {
+ } else if (const StoreInst *store = dyn_cast<StoreInst>(UI)) {
// Stores *of* the pointer are not interesting, only stores *to* the
// pointer.
if (UI->getOperand(1) != ASIV)