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Modified switch generation so that only the phi values associated with the

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destination basic block are copied.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17212 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
John Criswell 2004-10-25 18:30:09 +00:00
parent 151f8ba364
commit 30cc227fa7
2 changed files with 4 additions and 2 deletions
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3
lib/Target/CBackend/CBackend.cpp
View File

@ -1194,11 +1194,11 @@ void CWriter::visitReturnInst(ReturnInst &I) {
}
void CWriter::visitSwitchInst(SwitchInst &SI) {
printPHICopiesForSuccessors(SI.getParent(), 0);
Out << " switch (";
writeOperand(SI.getOperand(0));
Out << ") {\n default:\n";
printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
Out << ";\n";
for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
@ -1206,6 +1206,7 @@ void CWriter::visitSwitchInst(SwitchInst &SI) {
writeOperand(SI.getOperand(i));
Out << ":\n";
BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
printBranchToBlock(SI.getParent(), Succ, 2);
if (Succ == SI.getParent()->getNext())
Out << " break;\n";

3
lib/Target/CBackend/Writer.cpp
View File

@ -1194,11 +1194,11 @@ void CWriter::visitReturnInst(ReturnInst &I) {
}
void CWriter::visitSwitchInst(SwitchInst &SI) {
printPHICopiesForSuccessors(SI.getParent(), 0);
Out << " switch (";
writeOperand(SI.getOperand(0));
Out << ") {\n default:\n";
printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
Out << ";\n";
for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
@ -1206,6 +1206,7 @@ void CWriter::visitSwitchInst(SwitchInst &SI) {
writeOperand(SI.getOperand(i));
Out << ":\n";
BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
printBranchToBlock(SI.getParent(), Succ, 2);
if (Succ == SI.getParent()->getNext())
Out << " break;\n";