Index: test/MC/X86/intel-syntax-unsized-memory.s
===================================================================
--- test/MC/X86/intel-syntax-unsized-memory.s
+++ test/MC/X86/intel-syntax-unsized-memory.s
@@ -24,3 +24,6 @@
 
 // CHECK: vaddps (%rax), %zmm1, %zmm1
 vaddps zmm1, zmm1, [rax]
+
+// CHECK: leal 1(%r15d), %r9d
+lea r9d, [r15d+1]
Index: utils/TableGen/AsmMatcherEmitter.cpp
===================================================================
--- utils/TableGen/AsmMatcherEmitter.cpp
+++ utils/TableGen/AsmMatcherEmitter.cpp
@@ -2965,6 +2965,7 @@
   OS << "      continue;\n";
   OS << "    }\n";
   OS << "\n";
+  OS << "    Inst.clear();\n\n";
   OS << "    if (matchingInlineAsm) {\n";
   OS << "      Inst.setOpcode(it->Opcode);\n";
   OS << "      convertToMapAndConstraints(it->ConvertFn, Operands);\n";