[PowerPC] Add test to show wrong target flags printed at MO_TLSGDM_FLAG operand. NFC.

Author: Kai Luo

llvm/test/CodeGen/PowerPC/aix-tls-gd-target-flags.ll

@@ -0,0 +1,28 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 3
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-ibm-aix \
+; RUN:   -stop-after=finalize-isel < %s | FileCheck %s
+
+@a = external thread_local local_unnamed_addr global i32, align 4
+@b = external thread_local local_unnamed_addr global i32, align 4
+
+define signext i32 @foo() {
+  ; CHECK-LABEL: name: foo
+  ; CHECK: bb.0.entry:
+  ; CHECK-NEXT:   [[LDtoc:%[0-9]+]]:g8rc = LDtoc target-flags(ppc-lo) @a, $x2 :: (load (s64) from got)
+  ; CHECK-NEXT:   [[LDtoc1:%[0-9]+]]:g8rc = LDtoc target-flags(ppc-tlsgd) @a, $x2 :: (load (s64) from got)
+  ; CHECK-NEXT:   [[TLSGDAIX8_:%[0-9]+]]:g8rc_and_g8rc_nox0 = TLSGDAIX8 killed [[LDtoc1]], killed [[LDtoc]]
+  ; CHECK-NEXT:   [[LWZ:%[0-9]+]]:gprc = LWZ 0, killed [[TLSGDAIX8_]] :: (dereferenceable load (s32) from @a)
+  ; CHECK-NEXT:   [[LDtoc2:%[0-9]+]]:g8rc = LDtoc target-flags(ppc-lo) @b, $x2 :: (load (s64) from got)
+  ; CHECK-NEXT:   [[LDtoc3:%[0-9]+]]:g8rc = LDtoc target-flags(ppc-tlsgd) @b, $x2 :: (load (s64) from got)
+  ; CHECK-NEXT:   [[TLSGDAIX8_1:%[0-9]+]]:g8rc_and_g8rc_nox0 = TLSGDAIX8 killed [[LDtoc3]], killed [[LDtoc2]]
+  ; CHECK-NEXT:   [[LWZ1:%[0-9]+]]:gprc = LWZ 0, killed [[TLSGDAIX8_1]] :: (dereferenceable load (s32) from @b)
+  ; CHECK-NEXT:   [[ADD4_:%[0-9]+]]:gprc = nsw ADD4 killed [[LWZ1]], killed [[LWZ]]
+  ; CHECK-NEXT:   [[EXTSW_32_64_:%[0-9]+]]:g8rc = EXTSW_32_64 killed [[ADD4_]]
+  ; CHECK-NEXT:   $x3 = COPY [[EXTSW_32_64_]]
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm, implicit $x3
+entry:
+  %0 = load i32, i32* @a, align 4
+  %1 = load i32, i32* @b, align 4
+  %add = add nsw i32 %1, %0
+  ret i32 %add
+}