[clang][AIX] Adding Revised xcoff-roptr CodeGen Test Case

https://reviews.llvm.org/D150586 removed a problematic test cases that caused failures on non-ppc buildbots. This patch revises the test case and adds it back.

Reviewed By: hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D150597

clang/test/CodeGen/PowerPC/aix-roptr.c

@@ -0,0 +1,26 @@
+// REQUIRES: powerpc-registered-target
+// RUN: %clang_cc1 -triple=powerpc-ibm-aix-xcoff -mxcoff-roptr -fdata-sections \
+// RUN:     -S <%s | FileCheck %s --check-prefix=CHECK32
+// RUN: %clang_cc1 -triple=powerpc64-ibm-aix-xcoff -mxcoff-roptr -fdata-sections \
+// RUN:     -S <%s | FileCheck %s --check-prefix=CHECK64
+// RUN: not %clang_cc1 -triple=powerpc-ibm-aix-xcoff -mxcoff-roptr \
+// RUN:     -S <%s 2>&1 | FileCheck %s --check-prefix=DATA_SECTION_ERR
+// RUN: not %clang_cc1 -triple=powerpc64-ibm-aix-xcoff -mxcoff-roptr \
+// RUN:     -S <%s 2>&1 | FileCheck %s --check-prefix=DATA_SECTION_ERR
+// RUN: not %clang_cc1 -triple=powerpc64le-unknown-linux-gnu -mxcoff-roptr \
+// RUN:     %s 2>&1 | FileCheck %s --check-prefix=TARGET_ROPTR_ERR
+
+char c1 = 10;
+char* const c1_ptr = &c1;
+// CHECK32:         .csect c1_ptr[RO],2
+// CHECK32-NEXT:	.globl	c1_ptr[RO]
+// CHECK32-NEXT:	.align	2
+// CHECK32-NEXT:	.vbyte	4, c1[RW]
+
+// CHECK64:         .csect c1_ptr[RO],3
+// CHECK64-NEXT:	.globl	c1_ptr[RO]
+// CHECK64-NEXT:	.align	3
+// CHECK64-NEXT:	.vbyte	8, c1[RW]
+
+// DATA_SECTION_ERR: error: -mxcoff-roptr is supported only with -fdata-sections
+// TARGET_ROPTR_ERR: error: unsupported option '-mxcoff-roptr' for target 'powerpc64le-unknown-linux-gnu'