/// too, recursively. Return true if the PHI node is actually deleted.
bool RecursivelyDeleteDeadPHINode(PHINode *PN);
+
+/// SimplifyInstructionsInBlock - Scan the specified basic block and try to
+/// simplify any instructions in it and recursively delete dead instructions.
+///
+/// This returns true if it changed the code, note that it can delete
+/// instructions in other blocks as well in this block.
+bool SimplifyInstructionsInBlock(BasicBlock *BB, const TargetData *TD = 0);
+
//===----------------------------------------------------------------------===//
// Control Flow Graph Restructuring.
//
return Changed;
}
+/// SimplifyInstructionsInBlock - Scan the specified basic block and try to
+/// simplify any instructions in it and recursively delete dead instructions.
+///
+/// This returns true if it changed the code, note that it can delete
+/// instructions in other blocks as well in this block.
+bool llvm::SimplifyInstructionsInBlock(BasicBlock *BB, const TargetData *TD) {
+ bool MadeChange = false;
+ for (BasicBlock::iterator BI = BB->begin(), E = BB->end(); BI != E; ) {
+ Instruction *Inst = BI++;
+
+ if (Value *V = SimplifyInstruction(Inst, TD)) {
+ WeakVH BIHandle(BI);
+ ReplaceAndSimplifyAllUses(Inst, V, TD);
+ MadeChange = true;
+ if (BIHandle == 0)
+ BI = BB->begin();
+ continue;
+ }
+
+ MadeChange |= RecursivelyDeleteTriviallyDeadInstructions(Inst);
+ }
+ return MadeChange;
+}
+
//===----------------------------------------------------------------------===//
// Control Flow Graph Restructuring.
//