Fix r232466 by adding 'i' to the mappings for inline assembly memory constraints.

It's not completely clear why 'i' has historically been treated as a memory
constraint. According to the documentation, it represents a constant immediate.

llvm-svn: 232470

llvm/include/llvm/IR/InlineAsm.h

@@ -240,6 +240,7 @@ public:
     // constraint codes for all targets.
     Constraint_Unknown = 0,
     Constraint_es,
+    Constraint_i,
     Constraint_m,
     Constraint_o,
     Constraint_v, // Unused at the moment since Constraint_m is always used.

llvm/include/llvm/Target/TargetLowering.h

@@ -2627,7 +2627,9 @@ public:
 
   virtual unsigned
   getInlineAsmMemConstraint(const std::string &ConstraintCode) const {
-    if (ConstraintCode == "m")
+    if (ConstraintCode == "i")
+      return InlineAsm::Constraint_i;
+    else if (ConstraintCode == "m")
       return InlineAsm::Constraint_m;
     return InlineAsm::Constraint_Unknown;
   }

llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp

@@ -194,6 +194,7 @@ namespace {
         errs() << "ConstraintID: " << ConstraintID << "\n";
         llvm_unreachable("Unexpected asm memory constraint");
       case InlineAsm::Constraint_es:
+      case InlineAsm::Constraint_i:
       case InlineAsm::Constraint_m:
       case InlineAsm::Constraint_o:
       case InlineAsm::Constraint_Q: