6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-24 23:28:41 +00:00
Code Issues Projects Releases Wiki Activity

If succ has succ itself as one of the predecessors then do

Browse Source 
not merge current bb and succ even if bb's terminator is
unconditional branch to succ.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45305 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2007-12-22 01:32:53 +00:00
parent 889ac61113
commit 01666bf74b
2 changed files with 62 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
lib/Transforms/Utils/SimplifyCFG.cpp
View File

@@ -110,10 +110,10 @@ static bool CanPropagatePredecessorsForPHIs(BasicBlock *BB, BasicBlock *Succ) {
// update the PHI nodes correctly.
if (!isa<PHINode>(BB->begin()) || Succ->getSinglePredecessor()) return true;
// If the predecessors of Succ are only BB and Succ itself, handle it.
// If the predecessors of Succ are only BB, handle it.
bool IsSafe = true;
for (pred_iterator PI = pred_begin(Succ), E = pred_end(Succ); PI != E; ++PI)
if (*PI != Succ && *PI != BB) {
if (*PI != BB) {
IsSafe = false;
break;
}