Rebase and disable global merge for test case

Author: amy-kwan

llvm/test/CodeGen/PowerPC/mergeable-string-pool-tls.ll

@@ -1,9 +1,9 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff \
-; RUN:     -ppc-asm-full-reg-names < %s | FileCheck %s \
+; RUN:     -ppc-asm-full-reg-names -enable-global-merge=false < %s | FileCheck %s \
 ; RUN:     --check-prefix=CHECK64
 ; RUN: llc -verify-machineinstrs -mtriple powerpc-ibm-aix-xcoff \
-; RUN:     -ppc-asm-full-reg-names < %s | FileCheck %s \
+; RUN:     -ppc-asm-full-reg-names -enable-global-merge=false < %s | FileCheck %s \
 ; RUN:     --check-prefix=CHECK32
 ; RUN: llc -verify-machineinstrs -mtriple powerpc64le-unknown-linux \
 ; RUN:     -ppc-asm-full-reg-names < %s | FileCheck %s \