Add -verify-arm-pseudo-expand.
This hidden llc option runs the machine code verifier after expanding
ARM pseudo-instructions, but before if-conversion.
The machine code verifier is much better at pointing out liveness errors
that can trip up the register scavenger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136439 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMExpandPseudoInsts.cpp b/lib/Target/ARM/ARMExpandPseudoInsts.cpp
index d400ceb..a4fcfd5 100644
--- a/lib/Target/ARM/ARMExpandPseudoInsts.cpp
+++ b/lib/Target/ARM/ARMExpandPseudoInsts.cpp
@@ -26,9 +26,14 @@
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h" // FIXME: for debug only. remove!
using namespace llvm;
+cl::opt<bool>
+VerifyARMPseudo("verify-arm-pseudo-expand", cl::Hidden,
+ cl::desc("Verify machine code after expanding ARM pseudos"));
+
namespace {
class ARMExpandPseudo : public MachineFunctionPass {
public:
@@ -1328,6 +1333,8 @@
for (MachineFunction::iterator MFI = MF.begin(), E = MF.end(); MFI != E;
++MFI)
Modified |= ExpandMBB(*MFI);
+ if (VerifyARMPseudo)
+ MF.verify(this, "After expanding ARM pseudo instructions.");
return Modified;
}