SmallVectorize.

[oota-llvm.git] / include / llvm / Analysis / InstructionSimplify.h

diff --git a/include/llvm/Analysis/InstructionSimplify.h b/include/llvm/Analysis/InstructionSimplify.h
index bb5c811fe2e20a3209c91dcd1f186c260569a6b5..913fd77da3c57a386e1d35f16764548816159860 100644 (file)
--- a/include/llvm/Analysis/InstructionSimplify.h
+++ b/include/llvm/Analysis/InstructionSimplify.h
@@ -20,6 +20,11 @@ namespace llvm {
   class Instruction;
   class Value;
   class TargetData;
+
+  /// SimplifyAddInst - Given operands for an Add, see if we can
+  /// fold the result.  If not, this returns null.
+  Value *SimplifyAddInst(Value *LHS, Value *RHS, bool isNSW, bool isNUW,
+                         const TargetData *TD = 0);
   
   /// SimplifyAndInst - Given operands for an And, see if we can
   /// fold the result.  If not, this returns null.
@@ -41,7 +46,16 @@ namespace llvm {
   Value *SimplifyFCmpInst(unsigned Predicate, Value *LHS, Value *RHS,
                           const TargetData *TD = 0);
   
+  /// SimplifySelectInst - Given operands for a SelectInst, see if we can fold
+  /// the result.  If not, this returns null.
+  Value *SimplifySelectInst(Value *Cond, Value *TrueVal, Value *FalseVal,
+                            const TargetData *TD = 0);
 
+  /// SimplifyGEPInst - Given operands for an GetElementPtrInst, see if we can
+  /// fold the result.  If not, this returns null.
+  Value *SimplifyGEPInst(Value * const *Ops, unsigned NumOps,
+                         const TargetData *TD = 0);
+  
   //=== Helper functions for higher up the class hierarchy.
   
   
@@ -57,8 +71,19 @@ namespace llvm {
   
   /// SimplifyInstruction - See if we can compute a simplified version of this
   /// instruction.  If not, this returns null.
+  /// WARNING: If called on unreachable code, an instruction may be reported
+  /// to simplify to itself.
   Value *SimplifyInstruction(Instruction *I, const TargetData *TD = 0);
   
+  
+  /// ReplaceAndSimplifyAllUses - Perform From->replaceAllUsesWith(To) and then
+  /// delete the From instruction.  In addition to a basic RAUW, this does a
+  /// recursive simplification of the updated instructions.  This catches
+  /// things where one simplification exposes other opportunities.  This only
+  /// simplifies and deletes scalar operations, it does not change the CFG.
+  ///
+  void ReplaceAndSimplifyAllUses(Instruction *From, Value *To,
+                                 const TargetData *TD = 0);
 } // end namespace llvm
 
 #endif