RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-24 03:33:20 +01:00
Code Issues Projects Releases Wiki Activity

Fix Bug: LowerSwitch/2003-05-01-PHIProblem.ll

Browse Source 
llvm-svn: 5979
This commit is contained in:
Chris Lattner 2003-05-01 22:21:21 +00:00
parent 0d81b37efc
commit f13fe891d1
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/Transforms/Scalar/LowerSwitch.cpp
View File

@ -84,7 +84,7 @@ void LowerSwitch::processSwitchInst(SwitchInst *SI) {
Instruction *Br = new BranchInst(Succ, NextBlock, Comp);
CurBlock->getInstList().push_back(Br);
// If there were any PHI nodes in this success, rewrite one entry from
// If there were any PHI nodes in this successor, rewrite one entry from
// OrigBlock to come from CurBlock.
for (BasicBlock::iterator I = Succ->begin();
PHINode *PN = dyn_cast<PHINode>(I); ++I) {
@ -93,10 +93,20 @@ void LowerSwitch::processSwitchInst(SwitchInst *SI) {
PN->setIncomingBlock((unsigned)BlockIdx, CurBlock);
}
if (i == e-2) { // Is this looking at the default destination?
// If there is an entry in any PHI nodes for the default edge, make sure
// to update them as well.
for (BasicBlock::iterator I = NextBlock->begin();
PHINode *PN = dyn_cast<PHINode>(I); ++I) {
int BlockIdx = PN->getBasicBlockIndex(OrigBlock);
assert(BlockIdx != -1 && "Switch didn't go to this successor??");
PN->setIncomingBlock((unsigned)BlockIdx, CurBlock);
}
}
CurBlock = NextBlock; // Move on to the next condition
}
// We are now done with the switch instruction, delete it.
delete SI;
}