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Fix bug: LowerSwitch/2003-08-23-EmptySwitch.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8087 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-23 22:54:34 +00:00
parent 4d34adad67
commit 44bb541c01
1 changed files with 7 additions and 0 deletions
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7
lib/Transforms/Utils/LowerSwitch.cpp
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@ -63,6 +63,13 @@ void LowerSwitch::processSwitchInst(SwitchInst *SI) {
// Unlink the switch instruction from it's block. // Unlink the switch instruction from it's block.
CurBlock->getInstList().remove(SI); CurBlock->getInstList().remove(SI);
// If there is only the default destination, don't bother with the code below.
if (SI->getNumOperands() == 2) {
CurBlock->getInstList().push_back(new BranchInst(SI->getDefaultDest()));
delete SI;
return;
}
// Expand comparisons for all of the non-default cases... // Expand comparisons for all of the non-default cases...
for (unsigned i = 2, e = SI->getNumOperands(); i != e; i += 2) { for (unsigned i = 2, e = SI->getNumOperands(); i != e; i += 2) {
// Insert a new basic block after the current one... // Insert a new basic block after the current one...