Print symbolic SubRegIndex names on machine operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104628 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/include/llvm/Target/TargetRegisterInfo.h b/include/llvm/Target/TargetRegisterInfo.h
index 053168a..695d5ef 100644
--- a/include/llvm/Target/TargetRegisterInfo.h
+++ b/include/llvm/Target/TargetRegisterInfo.h
@@ -268,6 +268,7 @@ public:
   typedef const TargetRegisterClass * const * regclass_iterator;
 private:
   const TargetRegisterDesc *Desc;             // Pointer to the descriptor array
+  const char *const *SubRegIndexNames;        // Names of subreg indexes.
   unsigned NumRegs;                           // Number of entries in the array
 
   regclass_iterator RegClassBegin, RegClassEnd;   // List of regclasses
@@ -278,6 +279,7 @@ protected:
   TargetRegisterInfo(const TargetRegisterDesc *D, unsigned NR,
                      regclass_iterator RegClassBegin,
                      regclass_iterator RegClassEnd,
+                     const char *const *subregindexnames,
                      int CallFrameSetupOpcode = -1,
                      int CallFrameDestroyOpcode = -1,
                      const unsigned* subregs = 0,
@@ -378,6 +380,13 @@ public:
     return NumRegs;
   }
 
+  /// getSubRegIndexName - Return the human-readable symbolic target-specific
+  /// name for the specified SubRegIndex.
+  const char *getSubRegIndexName(unsigned SubIdx) const {
+    assert(SubIdx && "This is not a subregister index");
+    return SubRegIndexNames[SubIdx-1];
+  }
+
   /// regsOverlap - Returns true if the two registers are equal or alias each
   /// other. The registers may be virtual register.
   bool regsOverlap(unsigned regA, unsigned regB) const {