reapply the patches reverted in r149470 that reenable ConstantDataArray,

but with a critical fix to the SelectionDAG code that optimizes copies
from strings into immediate stores: the previous code was stopping reading
string data at the first nul.  Address this by adding a new argument to
llvm::getConstantStringInfo, preserving the behavior before the patch.

llvm-svn: 149800

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index da72ba5faf5..e9e16abddb6 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -2018,7 +2018,8 @@ bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) {
   }
   case lltok::kw_c:  // c "foo"
     Lex.Lex();
-    ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false);
+    ID.ConstantVal = ConstantDataArray::getString(Context, Lex.getStrVal(),
+                                                  false);
     if (ParseToken(lltok::StringConstant, "expected string")) return true;
     ID.Kind = ValID::t_Constant;
     return false;