================
@@ -126,4 +126,61 @@ PPC_LNX_CPU("power10",47)
#undef PPC_LNX_DEFINE_OFFSETS
#undef PPC_LNX_FEATURE
#undef PPC_LNX_CPU
+
+// Definition of the following values are found in the AIX header
+// file: </usr/include/sys/systemcfg.h>.
+#ifndef AIX_POWERPC_USE_SYS_CONF
+ #define AIX_POWERPC_USE_SYS_CONF
+ #define AIX_SYSCON_IMPL_IDX 1
+ #define AIX_PPC7_VALUE 0x00008000
+ #define AIX_PPC8_VALUE 0x00010000
+ #define AIX_PPC9_VALUE 0x00020000
+ #define AIX_PPC10_VALUE 0x00040000
+
+ // Supported SUPPORT_METHOD values.
+ #define AIX_BUILTIN_PPC_TRUE 1
+ #define AIX_BUILTIN_PPC_FALSE 0
+ #define USE_SYS_CONF 2
+
+ // Supported COMPARE_OP values.
+ #define COMP_EQ 0
+
+#endif
+
+// The value of SUPPORT_METHOD can be AIX_BUILTIN_PPC_TRUE,
+// AIX_BUILTIN_PPC_FALSE, Or USE_SYS_CONF.
----------------
amy-kwan wrote:
```suggestion
// AIX_BUILTIN_PPC_FALSE, or USE_SYS_CONF.
```
https://github.com/llvm/llvm-project/pull/80069
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