Index: llvm/lib/Transforms/Utils/MetaRenamer.cpp
===================================================================
--- llvm/lib/Transforms/Utils/MetaRenamer.cpp
+++ llvm/lib/Transforms/Utils/MetaRenamer.cpp
@@ -115,7 +115,7 @@
 
     for (auto &I : BB)
       if (!I.getType()->isVoidTy())
-        I.setName("inst");
+        I.setName(I.getOpcodeName());
   }
 }
 
Index: llvm/test/Transforms/MetaRenamer/opcodes.ll
===================================================================
--- /dev/null
+++ llvm/test/Transforms/MetaRenamer/opcodes.ll
@@ -0,0 +1,45 @@
+; RUN: opt -passes=metarenamer -S < %s | FileCheck %s
+
+define void @opcodes(ptr %p, ptr %arr) {
+; CHECK-LABEL: bb:
+; CHECK:         %load = load i32, ptr %arg, align 4
+; CHECK:         br label %bb2
+; CHECK-LABEL: bb2:                                              ; preds = %bb5, %bb
+; CHECK:         %phi = phi i32 [ %load, %bb ], [ %sub, %bb5 ]
+; CHECK:         %icmp = icmp eq i32 %phi, 0
+; CHECK:         br i1 %icmp, label %bb8, label %bb3
+; CHECK-LABEL: bb3:                                              ; preds = %bb2
+; CHECK:         %sub = sub i32 %phi, 1
+; CHECK:         %icmp4 = icmp ult i32 %sub, %load
+; CHECK:         br i1 %icmp4, label %bb5, label %bb9
+; CHECK-LABEL: bb5:                                              ; preds = %bb3
+; CHECK:         %getelementptr = getelementptr i32, ptr %arg, i32 %phi
+; CHECK:         %load6 = load i32, ptr %getelementptr, align 4
+; CHECK:         %icmp7 = icmp eq i32 %load6, 0
+; CHECK:         br i1 %icmp7, label %bb2, label %bb8
+preheader:
+  %len = load i32, ptr %p
+  br label %loop
+
+loop:
+  %iv = phi i32 [%len, %preheader], [%iv.next, %backedge]
+  %zero_cond = icmp eq i32 %iv, 0
+  br i1 %zero_cond, label %exit, label %range_check_block
+
+range_check_block:
+  %iv.next = sub i32 %iv, 1
+  %range_check = icmp ult i32 %iv.next, %len
+  br i1 %range_check, label %backedge, label %fail
+
+backedge:
+  %el.ptr = getelementptr i32, ptr %p, i32 %iv
+  %el = load i32, ptr %el.ptr
+  %loop.cond = icmp eq i32 %el, 0
+  br i1 %loop.cond, label %loop, label %exit
+
+exit:
+  ret void
+
+fail:
+  unreachable
+}