move FlattenVariants out of AsmMatcherEmitter into a shared

CodeGenInstruction::FlattenAsmStringVariants method.  Use it
to simplify the code in AsmWriterInst, which now no longer 
needs to worry about variants.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117886 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index e895361d69..93d1ce1ddf 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -23,6 +23,7 @@ namespace llvm {
   class Record;
   class DagInit;
   class CodeGenTarget;
+  class StringRef;
 
   class CodeGenInstruction {
   public:
@@ -201,6 +202,12 @@ namespace llvm {
     /// MVT::Other.
     MVT::SimpleValueType
       HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const;
+    
+    
+    /// FlattenAsmStringVariants - Flatten the specified AsmString to only
+    /// include text from the specified variant, returning the new string.
+    static std::string FlattenAsmStringVariants(StringRef AsmString,
+                                                unsigned Variant);
   };
 }