[llvm-commits] CVS: llvm/utils/TableGen/CodeGenTarget.cpp

[Evan Cheng]

Changes in directory llvm/utils/TableGen:

CodeGenTarget.cpp updated: 1.70 -> 1.71
---
Log message:

Tied-to constraint must be op_with_larger_idx = op_with_smaller_idx or else throw an exception.

---
Diffs of the changes:  (+3 -0)

 CodeGenTarget.cpp |    3 +++
 1 files changed, 3 insertions(+)


Index: llvm/utils/TableGen/CodeGenTarget.cpp
diff -u llvm/utils/TableGen/CodeGenTarget.cpp:1.70 llvm/utils/TableGen/CodeGenTarget.cpp:1.71
--- llvm/utils/TableGen/CodeGenTarget.cpp:1.70	Tue Oct 31 18:27:05 2006
+++ llvm/utils/TableGen/CodeGenTarget.cpp	Wed Nov  1 17:03:11 2006
@@ -280,6 +280,7 @@
   assert(pos != std::string::npos && "Unrecognized constraint");
   std::string Name = CStr.substr(1, pos); // Skip '$'
 
+  // TIED_TO: $src1 = $dst
   const std::string delims(" \t");
   std::string::size_type wpos = Name.find_first_of(delims);
   if (wpos != std::string::npos)
@@ -291,6 +292,8 @@
   if (wpos != std::string::npos)
     Name = Name.substr(wpos+1);
   unsigned TIdx = I->getOperandNamed(Name);
+  if (TIdx >= FIdx)
+    throw "Illegal tied-to operand constraint '" + CStr + "'";
   return std::make_pair(FIdx, (TIdx << 16) | 1);
 }