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Print all PHI copies for successor blocks before the terminator, whether it be a conditional branch or switch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13430 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -27,6 +27,7 @@
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#include "llvm/Analysis/ConstantsScanner.h"
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Support/CallSite.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/GetElementPtrTypeIterator.h"
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#include "llvm/Support/InstVisitor.h"
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#include "llvm/Support/Mangler.h"
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@ -162,6 +163,8 @@ namespace {
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void outputLValue(Instruction *I) {
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Out << " " << Mang->getValueName(I) << " = ";
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}
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void printPHICopiesForSuccessors(BasicBlock *CurBlock,
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unsigned Indent);
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void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
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unsigned Indent);
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void printIndexingExpression(Value *Ptr, gep_type_iterator I,
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@ -1035,6 +1038,8 @@ void CWriter::visitReturnInst(ReturnInst &I) {
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}
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void CWriter::visitSwitchInst(SwitchInst &SI) {
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printPHICopiesForSuccessors(SI.getParent(), 0);
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Out << " switch (";
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writeOperand(SI.getOperand(0));
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Out << ") {\n default:\n";
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@ -1061,7 +1066,7 @@ void CWriter::visitUnwindInst(UnwindInst &I) {
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assert(0 && "Lowerinvoke pass didn't work!");
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}
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bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
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static bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
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// If PHI nodes need copies, we need the copy code...
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if (isa<PHINode>(To->front()) ||
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From->getNext() != To) // Not directly successor, need goto
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@ -1071,17 +1076,23 @@ bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
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return false;
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}
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void CWriter::printPHICopiesForSuccessors(BasicBlock *CurBlock,
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unsigned Indent) {
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for (succ_iterator SI = succ_begin(CurBlock), E = succ_end(CurBlock);
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SI != E; ++SI)
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for (BasicBlock::iterator I = SI->begin();
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PHINode *PN = dyn_cast<PHINode>(I); ++I) {
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// now we have to do the printing
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Out << std::string(Indent, ' ');
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Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
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writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBlock)));
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Out << "; /* for PHI node */\n";
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}
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}
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void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
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unsigned Indent) {
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for (BasicBlock::iterator I = Succ->begin();
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PHINode *PN = dyn_cast<PHINode>(I); ++I) {
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// now we have to do the printing
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Out << std::string(Indent, ' ');
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Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
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writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
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Out << "; /* for PHI node */\n";
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}
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if (CurBB->getNext() != Succ ||
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isa<InvokeInst>(CurBB->getTerminator()) ||
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isa<SwitchInst>(CurBB->getTerminator())) {
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@ -1095,6 +1106,8 @@ void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
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// that immediately succeeds the current one.
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//
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void CWriter::visitBranchInst(BranchInst &I) {
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printPHICopiesForSuccessors(I.getParent(), 0);
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if (I.isConditional()) {
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if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
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Out << " if (";
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@ -27,6 +27,7 @@
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#include "llvm/Analysis/ConstantsScanner.h"
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Support/CallSite.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/GetElementPtrTypeIterator.h"
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#include "llvm/Support/InstVisitor.h"
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#include "llvm/Support/Mangler.h"
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@ -162,6 +163,8 @@ namespace {
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void outputLValue(Instruction *I) {
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Out << " " << Mang->getValueName(I) << " = ";
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}
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void printPHICopiesForSuccessors(BasicBlock *CurBlock,
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unsigned Indent);
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void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
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unsigned Indent);
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void printIndexingExpression(Value *Ptr, gep_type_iterator I,
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@ -1035,6 +1038,8 @@ void CWriter::visitReturnInst(ReturnInst &I) {
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}
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void CWriter::visitSwitchInst(SwitchInst &SI) {
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printPHICopiesForSuccessors(SI.getParent(), 0);
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Out << " switch (";
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writeOperand(SI.getOperand(0));
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Out << ") {\n default:\n";
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@ -1061,7 +1066,7 @@ void CWriter::visitUnwindInst(UnwindInst &I) {
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assert(0 && "Lowerinvoke pass didn't work!");
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}
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bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
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static bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
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// If PHI nodes need copies, we need the copy code...
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if (isa<PHINode>(To->front()) ||
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From->getNext() != To) // Not directly successor, need goto
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@ -1071,17 +1076,23 @@ bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
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return false;
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}
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void CWriter::printPHICopiesForSuccessors(BasicBlock *CurBlock,
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unsigned Indent) {
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for (succ_iterator SI = succ_begin(CurBlock), E = succ_end(CurBlock);
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SI != E; ++SI)
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for (BasicBlock::iterator I = SI->begin();
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PHINode *PN = dyn_cast<PHINode>(I); ++I) {
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// now we have to do the printing
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Out << std::string(Indent, ' ');
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Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
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writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBlock)));
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Out << "; /* for PHI node */\n";
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}
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}
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void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
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unsigned Indent) {
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for (BasicBlock::iterator I = Succ->begin();
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PHINode *PN = dyn_cast<PHINode>(I); ++I) {
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// now we have to do the printing
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Out << std::string(Indent, ' ');
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Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
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writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
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Out << "; /* for PHI node */\n";
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}
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if (CurBB->getNext() != Succ ||
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isa<InvokeInst>(CurBB->getTerminator()) ||
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isa<SwitchInst>(CurBB->getTerminator())) {
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@ -1095,6 +1106,8 @@ void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
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// that immediately succeeds the current one.
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//
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void CWriter::visitBranchInst(BranchInst &I) {
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printPHICopiesForSuccessors(I.getParent(), 0);
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if (I.isConditional()) {
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if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
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Out << " if (";
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