diff --git a/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-1.ll b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-1.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-1.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2 | FileCheck %s --check-prefixes=A,B
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --allow-unused-prefixes=true --check-prefixes=C,A,UNUSED
+
+declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
+; A: declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
+
+define <2 x i64> @fold_v2i64() {
+entry:
+  %r = call <2 x i64> @llvm.bswap.v2i64(<2 x i64> <i64 255, i64 -1>)
+  ret <2 x i64> %r
+}
diff --git a/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-2.ll b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-2.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-2.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2 | FileCheck %s --check-prefixes=A,B
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefixes=C,A
+
+declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
+; A: declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
+
+define <2 x i64> @fold_v2i64() {
+entry:
+  %r = call <2 x i64> @llvm.bswap.v2i64(<2 x i64> <i64 255, i64 -1>)
+  ret <2 x i64> %r
+}
diff --git a/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-3.ll b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-3.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/common-label-different-bodies-3.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2 | FileCheck %s --check-prefixes=A,B
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefixes=A,C
+
+declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
+; A: declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
+
+define <2 x i64> @fold_v2i64() {
+entry:
+  %r = call <2 x i64> @llvm.bswap.v2i64(<2 x i64> <i64 255, i64 -1>)
+  ret <2 x i64> %r
+}
diff --git a/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/common-label-different-bodies.test b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/common-label-different-bodies.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/UpdateTestChecks/update_llc_test_checks/common-label-different-bodies.test
@@ -0,0 +1,14 @@
+# REQUIRES: x86-registered-target
+
+# RUN: cp -f %S/Inputs/common-label-different-bodies-1.ll %t-1.ll
+# RUN: cp -f %S/Inputs/common-label-different-bodies-2.ll %t-2.ll
+# RUN: cp -f %S/Inputs/common-label-different-bodies-3.ll %t-3.ll
+# RUN: %update_llc_test_checks %t-1.ll
+# RUN: %update_llc_test_checks %t-2.ll
+# RUN: %update_llc_test_checks %t-3.ll
+# RUN: FileCheck --input-file=%t-1.ll %s
+# RUN: FileCheck --input-file=%t-2.ll %s
+# RUN: FileCheck --input-file=%t-3.ll %s
+
+# CHECK: B-LABEL: fold_v2i64
+# CHECK-NOT: A-LABEL: fold_v2i64
\ No newline at end of file
diff --git a/llvm/utils/UpdateTestChecks/common.py b/llvm/utils/UpdateTestChecks/common.py
--- a/llvm/utils/UpdateTestChecks/common.py
+++ b/llvm/utils/UpdateTestChecks/common.py
@@ -293,11 +293,8 @@
             func_dict[prefix][func].args_and_sig = args_and_sig
             continue
           else:
-            if prefix == prefixes[-1]:
-              warn('Found conflicting asm under the same prefix: %r!' % (prefix,))
-            else:
-              func_dict[prefix][func] = None
-              continue
+            func_dict[prefix][func] = None
+            continue
 
       func_dict[prefix][func] = function_body(scrubbed_body, scrubbed_extra, args_and_sig, attrs)
       func_order[prefix].append(func)