Fix bad length argument to substr calls. Apparently I'm the first one to

attempt more than 2 constraints on an instruction.

llvm-svn: 80169

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/utils/TableGen/CodeGenInstruction.cpp b/llvm/utils/TableGen/CodeGenInstruction.cpp
index 4650b88fd51..b7968a0e9cd 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.cpp
+++ b/llvm/utils/TableGen/CodeGenInstruction.cpp
@@ -22,7 +22,7 @@ static void ParseConstraint(const std::string &CStr, CodeGenInstruction *I) {
   std::string::size_type pos = CStr.find_first_of('=');
   assert(pos != std::string::npos && "Unrecognized constraint");
   std::string::size_type start = CStr.find_first_not_of(" \t");
-  std::string Name = CStr.substr(start, pos);
+  std::string Name = CStr.substr(start, pos - start);
   
   // TIED_TO: $src1 = $dst
   std::string::size_type wpos = Name.find_first_of(" \t");
@@ -70,7 +70,7 @@ static void ParseConstraints(const std::string &CStr, CodeGenInstruction *I) {
     if (eidx == std::string::npos)
       eidx = CStr.length();
     
-    ParseConstraint(CStr.substr(bidx, eidx), I);
+    ParseConstraint(CStr.substr(bidx, eidx - bidx), I);
     bidx = CStr.find_first_not_of(delims, eidx);
   }
 }