capture implicit uses and defs in CodeGenInstruction

llvm-svn: 98879

2 files changed, 6 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/CodeGenInstruction.cpp b/llvm/utils/TableGen/CodeGenInstruction.cpp
index 6ab5f06dda7..eea55618721 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.cpp
+++ b/llvm/utils/TableGen/CodeGenInstruction.cpp
@@ -123,6 +123,8 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
   hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq");
   hasOptionalDef = false;
   isVariadic = false;
+  ImplicitDefs = R->getValueAsListOfDefs("Defs");
+  ImplicitUses = R->getValueAsListOfDefs("Uses");
 
   if (neverHasSideEffects + hasSideEffects > 1)
     throw R->getName() + ": multiple conflicting side-effect flags set!";
diff --git a/llvm/utils/TableGen/CodeGenInstruction.h b/llvm/utils/TableGen/CodeGenInstruction.h
index 8e7051bcda2..c369123dd69 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.h
+++ b/llvm/utils/TableGen/CodeGenInstruction.h
@@ -114,6 +114,10 @@ namespace llvm {
     /// type (which is a record).
     std::vector<OperandInfo> OperandList;
 
+    /// ImplicitDefs/ImplicitUses - These are lists of registers that are
+    /// implicitly defined and used by the instruction.
+    std::vector<Record*> ImplicitDefs, ImplicitUses;
+
     // Various boolean values we track for the instruction.
     bool isReturn;
     bool isBranch;