GlobalISel: improve translation fallback for constants.

Returning 0 (NoReg) from getOrCreateVReg leads to unexpected situations later
in the translation. It's better to return a valid (if undefined) register and
let the rest of the instruction carry on as planned.

llvm-svn: 288709

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index e8d1ce0586d..a580e745171 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -74,7 +74,7 @@ unsigned IRTranslator::getOrCreateVReg(const Value &Val) {
         if (!TPC->isGlobalISelAbortEnabled()) {
           MIRBuilder.getMF().getProperties().set(
               MachineFunctionProperties::Property::FailedISel);
-          return 0;
+          return VReg;
         }
         reportTranslationError(Val, "unable to translate constant");
       }