[IRInterpreter] Fall back to JIT with 128-bit values.

They're not that common, and falling back is definitely
better than throwing an error instead of the result. If we
feel motivated, we might end up implementing support for these,
but it's unclear whether it's worth the effort/complexity.

Fixes PR38925.

<rdar://problem/44436068>

llvm-svn: 342262

1 files changed, 12 insertions, 0 deletions

diff --git a/lldb/source/Expression/IRInterpreter.cpp b/lldb/source/Expression/IRInterpreter.cpp
index 990646da045..2c08d098b4d 100644
--- a/lldb/source/Expression/IRInterpreter.cpp
+++ b/lldb/source/Expression/IRInterpreter.cpp
@@ -613,6 +613,18 @@ bool IRInterpreter::CanInterpret(llvm::Module &module, llvm::Function &function,
         }
         }
 
+        // The IR interpreter currently doesn't know about
+        // 128-bit integers. As they're not that frequent,
+        // we can just fall back to the JIT rather than
+        // choking.
+        if (operand_type->getPrimitiveSizeInBits() > 64) {
+          if (log)
+            log->Printf("Unsupported operand type: %s",
+                        PrintType(operand_type).c_str());
+          error.SetErrorString(unsupported_operand_error);
+          return false;
+        }
+
         if (Constant *constant = llvm::dyn_cast<Constant>(operand)) {
           if (!CanResolveConstant(constant)) {
             if (log)