[NFC] [MTE] make test more robust by not hardcoding %1

Author: fmayer

llvm/test/CodeGen/AArch64/stack-tagging-prologue.ll

@@ -25,7 +25,7 @@ entry:
 ; INSTR:  [[BASE:%.*]] = call ptr @llvm.aarch64.irg.sp(i64 0)
 ; INSTR:  [[TLS:%.*]] = call ptr @llvm.thread.pointer()
 ; INSTR:  [[TLS_SLOT:%.*]] = getelementptr i8, ptr [[TLS]], i32 -24
-; INSTR:  [[TLS_VALUE:%.*]] = load i64, ptr %1, align 8
+; INSTR:  [[TLS_VALUE:%.*]] = load i64, ptr [[TLS_SLOT]], align 8
 ; INSTR:  [[FP:%.*]] = call ptr @llvm.frameaddress.p0(i32 0)
 ; INSTR:  [[FP_INT:%.*]] = ptrtoint ptr [[FP]] to i64
 ; INSTR:  [[BASE_INT:%.*]] = ptrtoint ptr [[BASE]] to i64