Remove double-def checking from MachineVerifier, so a register does not have to

be killed before being redefined.

These checks are usually disabled, and usually fail when enabled. We de facto
allow live registers to be redefined without a kill, the corresponding
assertions in RegScavenger were removed long ago.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110362 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MachineFunction.h

@@ -266,7 +266,7 @@ public:
 
   /// verify - Run the current MachineFunction through the machine code
   /// verifier, useful for debugger use.
-  void verify(Pass *p=NULL, bool allowDoubleDefs=false) const;
+  void verify(Pass *p=NULL) const;
 
   // Provide accessors for the MachineBasicBlock list...
   typedef BasicBlockListType::iterator iterator;

include/llvm/CodeGen/Passes.h

@@ -188,10 +188,7 @@ namespace llvm {
 
   /// createMachineVerifierPass - This pass verifies cenerated machine code
   /// instructions for correctness.
-  ///
-  /// @param allowDoubleDefs ignore double definitions of
-  ///        registers. Useful before LiveVariables has run.
-  FunctionPass *createMachineVerifierPass(bool allowDoubleDefs);
+  FunctionPass *createMachineVerifierPass();
 
   /// createDwarfEHPass - This pass mulches exception handling code into a form
   /// adapted to code generation.  Required if using dwarf exception handling.