[llvm] r257620 - [WebAssemly] Invalidate liveness in CFG stackifier

[Derek Schuff via llvm-commits]

Author: dschuff
Date: Wed Jan 13 11:10:28 2016
New Revision: 257620

URL: http://llvm.org/viewvc/llvm-project?rev=257620&view=rev
Log:
[WebAssemly] Invalidate liveness in CFG stackifier

WebAssemblyCFGStackify does not track liveness for EXPR_STACK, causing
verifier failure if liveness has not already been invalidated.

Modified:
    llvm/trunk/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp

Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp?rev=257620&r1=257619&r2=257620&view=diff
==============================================================================
--- llvm/trunk/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp (original)
+++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp Wed Jan 13 11:10:28 2016
@@ -34,6 +34,7 @@
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineLoopInfo.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
@@ -475,7 +476,9 @@ bool WebAssemblyCFGStackify::runOnMachin
 
   const auto &MLI = getAnalysis<MachineLoopInfo>();
   auto &MDT = getAnalysis<MachineDominatorTree>();
+  // Liveness is not tracked for EXPR_STACK physreg.
   const auto &TII = *MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();
+  MF.getRegInfo().invalidateLiveness();
 
   // RPO sorting needs all loops to be single-entry.
   EliminateMultipleEntryLoops(MF, MLI);