fix PR4767, a crash because fp stackifier visited blocks in
depth first order, so it wouldn't process unreachable blocks.
When compiling at -O0, late dead block elimination isn't done
and the bad instructions got to isel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81187 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86FloatingPoint.cpp b/lib/Target/X86/X86FloatingPoint.cpp
index af0da6f..d9a05a8 100644
--- a/lib/Target/X86/X86FloatingPoint.cpp
+++ b/lib/Target/X86/X86FloatingPoint.cpp
@@ -213,6 +213,14 @@
I != E; ++I)
Changed |= processBasicBlock(MF, **I);
+ // Process any unreachable blocks in arbitrary order now.
+ if (MF.size() == Processed.size())
+ return Changed;
+
+ for (MachineFunction::iterator BB = MF.begin(), E = MF.end(); BB != E; ++BB)
+ if (Processed.insert(BB))
+ Changed |= processBasicBlock(MF, *BB);
+
return Changed;
}