[llvm-branch-commits] [llvm-branch] r81268 - in /llvm/branches/release_26: lib/Target/X86/X86FloatingPoint.cpp test/CodeGen/X86/fp-stack-O0-crash.ll

[Tanya Lattner]

Author: tbrethou
Date: Tue Sep  8 18:19:21 2009
New Revision: 81268

URL: http://llvm.org/viewvc/llvm-project?rev=81268&view=rev
Log:
Merge 81187 from mainline.
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.

Added:
    llvm/branches/release_26/test/CodeGen/X86/fp-stack-O0-crash.ll
      - copied unchanged from r81187, llvm/trunk/test/CodeGen/X86/fp-stack-O0-crash.ll
Modified:
    llvm/branches/release_26/lib/Target/X86/X86FloatingPoint.cpp

Modified: llvm/branches/release_26/lib/Target/X86/X86FloatingPoint.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/release_26/lib/Target/X86/X86FloatingPoint.cpp?rev=81268&r1=81267&r2=81268&view=diff

==============================================================================
--- llvm/branches/release_26/lib/Target/X86/X86FloatingPoint.cpp (original)
+++ llvm/branches/release_26/lib/Target/X86/X86FloatingPoint.cpp Tue Sep  8 18:19:21 2009
@@ -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;
 }