#include "llvm/ADT/Statistic.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/raw_ostream.h"
#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Assembly/Writer.h"
#define DEBUG_TYPE "region"
#include "llvm/Support/Debug.h"
STATISTIC(numRegions, "The # of regions");
STATISTIC(numSimpleRegions, "The # of simple regions");
-//===----------------------------------------------------------------------===//
-/// PrintStyle - Print region in difference ways.
-enum PrintStyle { PrintNone, PrintBB, PrintRN };
-
-cl::opt<enum PrintStyle> printStyle("print-region-style", cl::Hidden,
+static cl::opt<enum Region::PrintStyle> printStyle("print-region-style",
+ cl::Hidden,
cl::desc("style of printing regions"),
cl::values(
- clEnumValN(PrintNone, "none", "print no details"),
- clEnumValN(PrintBB, "bb", "print regions in detail with block_iterator"),
- clEnumValN(PrintRN, "rn", "print regions in detail with element_iterator"),
+ clEnumValN(Region::PrintNone, "none", "print no details"),
+ clEnumValN(Region::PrintBB, "bb",
+ "print regions in detail with block_iterator"),
+ clEnumValN(Region::PrintRN, "rn",
+ "print regions in detail with element_iterator"),
clEnumValEnd));
//===----------------------------------------------------------------------===//
/// Region Implementation
return outermostLoopInRegion(L);
}
-bool Region::isSimple() const {
- bool isSimple = true;
- bool found = false;
-
- BasicBlock *entry = getEntry(), *exit = getExit();
-
- // TopLevelRegion
- if (!exit)
- return false;
+BasicBlock *Region::getEnteringBlock() const {
+ BasicBlock *entry = getEntry();
+ BasicBlock *Pred;
+ BasicBlock *enteringBlock = 0;
for (pred_iterator PI = pred_begin(entry), PE = pred_end(entry); PI != PE;
++PI) {
- BasicBlock *Pred = *PI;
+ Pred = *PI;
if (DT->getNode(Pred) && !contains(Pred)) {
- if (found) {
- isSimple = false;
- break;
- }
- found = true;
+ if (enteringBlock)
+ return 0;
+
+ enteringBlock = Pred;
}
}
- found = false;
+ return enteringBlock;
+}
+
+BasicBlock *Region::getExitingBlock() const {
+ BasicBlock *exit = getExit();
+ BasicBlock *Pred;
+ BasicBlock *exitingBlock = 0;
+
+ if (!exit)
+ return 0;
for (pred_iterator PI = pred_begin(exit), PE = pred_end(exit); PI != PE;
- ++PI)
- if (contains(*PI)) {
- if (found) {
- isSimple = false;
- break;
- }
- found = true;
+ ++PI) {
+ Pred = *PI;
+ if (contains(Pred)) {
+ if (exitingBlock)
+ return 0;
+
+ exitingBlock = Pred;
}
+ }
- return isSimple;
+ return exitingBlock;
+}
+
+bool Region::isSimple() const {
+ return !isTopLevelRegion() && getEnteringBlock() && getExitingBlock();
}
std::string Region::getNameStr() const {
raw_string_ostream OS(entryName);
WriteAsOperand(OS, getEntry(), false);
- entryName = OS.str();
} else
- entryName = getEntry()->getNameStr();
+ entryName = getEntry()->getName();
if (getExit()) {
if (getExit()->getName().empty()) {
raw_string_ostream OS(exitName);
WriteAsOperand(OS, getExit(), false);
- exitName = OS.str();
} else
- exitName = getExit()->getNameStr();
+ exitName = getExit()->getName();
} else
exitName = "<Function Return>";
return Depth;
}
-void Region::print(raw_ostream &OS, bool print_tree, unsigned level) const {
+Region *Region::getExpandedRegion() const {
+ unsigned NumSuccessors = exit->getTerminator()->getNumSuccessors();
+
+ if (NumSuccessors == 0)
+ return NULL;
+
+ for (pred_iterator PI = pred_begin(getExit()), PE = pred_end(getExit());
+ PI != PE; ++PI)
+ if (!DT->dominates(getEntry(), *PI))
+ return NULL;
+
+ Region *R = RI->getRegionFor(exit);
+
+ if (R->getEntry() != exit) {
+ if (exit->getTerminator()->getNumSuccessors() == 1)
+ return new Region(getEntry(), *succ_begin(exit), RI, DT);
+ else
+ return NULL;
+ }
+
+ while (R->getParent() && R->getParent()->getEntry() == exit)
+ R = R->getParent();
+
+ if (!DT->dominates(getEntry(), R->getExit()))
+ for (pred_iterator PI = pred_begin(getExit()), PE = pred_end(getExit());
+ PI != PE; ++PI)
+ if (!DT->dominates(R->getExit(), *PI))
+ return NULL;
+
+ return new Region(getEntry(), R->getExit(), RI, DT);
+}
+
+void Region::print(raw_ostream &OS, bool print_tree, unsigned level,
+ enum PrintStyle Style) const {
if (print_tree)
OS.indent(level*2) << "[" << level << "] " << getNameStr();
else
OS << "\n";
- if (printStyle != PrintNone) {
+ if (Style != PrintNone) {
OS.indent(level*2) << "{\n";
OS.indent(level*2 + 2);
- if (printStyle == PrintBB) {
+ if (Style == PrintBB) {
for (const_block_iterator I = block_begin(), E = block_end(); I!=E; ++I)
OS << **I << ", "; // TODO: remove the last ","
- } else if (printStyle == PrintRN) {
+ } else if (Style == PrintRN) {
for (const_element_iterator I = element_begin(), E = element_end(); I!=E; ++I)
OS << **I << ", "; // TODO: remove the last ",
}
if (print_tree)
for (const_iterator RI = begin(), RE = end(); RI != RE; ++RI)
- (*RI)->print(OS, print_tree, level+1);
+ (*RI)->print(OS, print_tree, level+1, Style);
- if (printStyle != PrintNone)
+ if (Style != PrintNone)
OS.indent(level*2) << "} \n";
}
void Region::dump() const {
- print(dbgs(), true, getDepth());
+ print(dbgs(), true, getDepth(), printStyle.getValue());
}
void Region::clearNodeCache() {
// Free the cached nodes.
for (BBNodeMapT::iterator I = BBNodeMap.begin(),
- IE = BBNodeMap.end(); I != IE; ++IE)
+ IE = BBNodeMap.end(); I != IE; ++I)
delete I->second;
BBNodeMap.clear();
}
RegionInfo::RegionInfo() : FunctionPass(ID) {
+ initializeRegionInfoPass(*PassRegistry::getPassRegistry());
TopLevelRegion = 0;
}
void RegionInfo::print(raw_ostream &OS, const Module *) const {
OS << "Region tree:\n";
- TopLevelRegion->print(OS, true, 0);
+ TopLevelRegion->print(OS, true, 0, printStyle.getValue());
OS << "End region tree\n";
}
return ret;
}
+void RegionInfo::splitBlock(BasicBlock* NewBB, BasicBlock *OldBB)
+{
+ Region *R = getRegionFor(OldBB);
+
+ setRegionFor(NewBB, R);
+
+ while (R->getEntry() == OldBB && !R->isTopLevelRegion()) {
+ R->replaceEntry(NewBB);
+ R = R->getParent();
+ }
+
+ setRegionFor(OldBB, R);
+}
+
char RegionInfo::ID = 0;
INITIALIZE_PASS_BEGIN(RegionInfo, "regions",
"Detect single entry single exit regions", true, true)
projects / oota-llvm.git / blobdiff