Add AIX Target Info

[andusy]

Summary

A first pass over platform-specific properties of the C API/ABI on AIX for both 32-bit and 64-bit modes. This is a continuation of D18360 by Andrew Paprocki and further work by Wu Zhao.

[hubert.reinterpretcast]

clang/lib/Basic/Targets/OSTargets.h

626

Comments should be full sentences (with periods). Please update throughout this patch.

629

@rsmith suggested that having a -fno-long-long option to disable support for long long would be preferable to having an -maix-no-long-long that just controls the AIX binary-compatibility aspects. Perhaps the FIXME should be updated to mention checking -fno-long-long.

637

Suggestion for the comment text:
Define _WCHAR_T when it is a fundamental type (i.e., for C++ without -fno-wchar).

641

D18360 sets _THREAD_SAFE to 1 when -pthread is specified. I believe that to be correct. I believe whether or not -pthread is taken to be the default on the platform is a separate consideration.

651

Can we have a test for this?

[apaprocki]

clang/lib/Basic/Targets/OSTargets.h

626

I do not think it is realistic to support an AIX target prior to 7.1, so should this unconditionally define up to and including _AIX71 similar to D18360 did (it was written earlier and defined up to _AIX61 unconditionally) and leave a FIXME to determine when to emit _AIX72 or any other later versions?

clang/test/Preprocessor/init.c

6420

XL on AIX emits #define _LP64 1 in 64-bit mode and #define _ILP32 1 in 32-bit mode in the pre-defined macros. Is that important to capture?

[hubert.reinterpretcast]

clang/lib/Basic/Targets/OSTargets.h

626

I agree with your assessment re: older versions of AIX in terms of having a full solution for modern C++. Nevertheless, we can leave room open for hobby builds targeting older versions where the immediate cost is not high. Cross compiling to an older AIX target will probably be entirely possible for C.

clang/test/Preprocessor/init.c

6420

I think so. The v16.1 XL compiler's xlclang also produces these.

#define __LP64__ 1
#define _LP64 1

#define __ILP32__ 1
#define _ILP32 1

[hubert.reinterpretcast]

clang/test/Preprocessor/init.c

6420

It seems GCC on AIX only defines the macros for 64-bit, and not the 32-bit versions. The system headers do not appear to depend on the 32-bit versions. It makes sense to start with the common intersection between the GCC and XL predefined macros first. We can add __LP64__ and _LP64 with this patch. I think we can leave more macros for later.

[sfertile]

clang/test/Preprocessor/init.c

6420

It makes sense to start with the common intersection between the GCC and XL predefined macros first

Agreed

[andusy]

• Updated comments
• Added testing for UseZeroLengthBitfieldAlignment
• Defined _THREAD_SAFE when -pthread is enabled
• Check for definition of __LP64__ and _LP64 macros

[andusy]

clang/lib/Basic/Targets/OSTargets.h

641

I've added a test in clang/test/Preprocessor/init.c to check if the macro is defined when -pthread is enabled.

[andusy]

clang/test/CodeGen/arm-aapcs-zerolength-bitfield.c

5 ↗

(On Diff #189890)

This file is pending a name change.

[hubert.reinterpretcast]

clang/lib/Basic/Targets/OSTargets.h

640

Line is longer than 80 characters. Please split it.

clang/test/CodeGen/arm-aapcs-zerolength-bitfield.c

1 ↗

(On Diff #189890)

Given the requirement for arm-registered-target, is the file actually run whenever we intend it to be? Also, a note re: the existing test: This does not seem to be a CodeGen test; indeed, it is effective even with -fsyntax-only. It seems this should be moved to clang/test/Sema.

However, not all of the cases are common anyway. We will later need to post changes that implement AIX's 4-byte storage units for bit-fields. I think we should leave this file alone for the purposes of this patch.

clang/test/Preprocessor/init.c

7025

Add a check that _LP64 is not defined under the 32-bit mode. Similarly for __LP64__ and __64BIT__. Other targets also check for the presence or absence of _ILP32 and __ILP32__, so we probably should do the same.

[andusy]

• Fixed comment.
• Checked that _LP64, __LP64__, and __64BIT__ aren't defined in 32 bit mode.
• Checked that _ILP32 and __ILP32__ aren't defined in 64 bit mode.

[hubert.reinterpretcast]

I think all comments have been addressed or otherwise responded to.
@jasonliu: Since this patch is dependent on D58930, I would suggest that you commit it after D58930. A friendly reminder to include the patch attribution for @andusy. @apaprocki, and @WuZhao. Thanks.

[jasonliu]

I'm seeing some build bot failures because of the newly added test case: max_align.c.
So I reverted the previous committed change.
Please fix the test case and let me know so that I can help you commit again.

[hubert.reinterpretcast]

test/Headers/max_align.c

1 ↗

(On Diff #190425)

We may need to explicitly specify C11. It also seems that we should XFAIL Windows targets.

[lebedev.ri]

test/Headers/max_align.c

1 ↗

(On Diff #190425)

Does this need an explicit -triple=??? ?

[hubert.reinterpretcast]

test/Headers/max_align.c

1 ↗

(On Diff #190425)

I don't think this test is target-specific, I read the specifications (as opposed to the implementations) of max_align_t and __BIGGEST_ALIGNMENT__ as saying that _Alignof(max_align_t) should be the same as __BIGGEST_ALIGNMENT__.

Granted, it seems max_align_t on Windows does not match __BIGGEST_ALIGNMENT__. So, a custom malloc implementation querying on one might not align sufficiently based on the other.

clang/lib/Basic/Targets.cpp

case llvm::Triple::ppc:
     case llvm::Triple::FreeBSD:
       return new FreeBSDTargetInfo<PPC32TargetInfo>(Triple, Opts);
     case llvm::Triple::NetBSD:
       return new NetBSDTargetInfo<PPC32TargetInfo>(Triple, Opts);
     case llvm::Triple::OpenBSD:
       return new OpenBSDTargetInfo<PPC32TargetInfo>(Triple, Opts);
     case llvm::Triple::RTEMS:
       return new RTEMSTargetInfo<PPC32TargetInfo>(Triple, Opts);
+    case llvm::Triple::AIX:
+      return new AIXPPC32TargetInfo(Triple, Opts);
     default:
       return new PPC32TargetInfo(Triple, Opts);
     }
 
   case llvm::Triple::ppc64:
     if (Triple.isOSDarwin())
       return new DarwinPPC64TargetInfo(Triple, Opts);
     switch (os) {
     case llvm::Triple::Linux:
       return new LinuxTargetInfo<PPC64TargetInfo>(Triple, Opts);
     case llvm::Triple::Lv2:
       return new PS3PPUTargetInfo<PPC64TargetInfo>(Triple, Opts);
     case llvm::Triple::FreeBSD:
       return new FreeBSDTargetInfo<PPC64TargetInfo>(Triple, Opts);
     case llvm::Triple::NetBSD:
       return new NetBSDTargetInfo<PPC64TargetInfo>(Triple, Opts);
+    case llvm::Triple::AIX:
+      return new AIXPPC64TargetInfo(Triple, Opts);
     default:
       return new PPC64TargetInfo(Triple, Opts);
     }
 
   case llvm::Triple::ppc64le:
     switch (os) {
     case llvm::Triple::Linux:
       return new LinuxTargetInfo<PPC64TargetInfo>(Triple, Opts);

clang/lib/Basic/Targets/OSTargets.h

SolarisTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
     case llvm::Triple::x86:
     case llvm::Triple::x86_64:
       this->HasFloat128 = true;
       break;
     }
   }
 };
 
+// AIX Target
+template <typename Target>
+class AIXTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("_IBMR2");
+    Builder.defineMacro("_POWER");
+    
+    // FIXME: Define AIX OS-Version Macros
+    Builder.defineMacro("_AIX");
+   
+    // FIXME: Determine the proper way for users to select the no-long-long 
+    // version of the standard library
+    Builder.defineMacro("_LONG_LONG");
+
+    if (this->PointerWidth == 64) {
+      Builder.defineMacro("__64BIT__");
+    }
+
+    // Define _WCHAR_T only for C++
+    if (Opts.CPlusPlus && Opts.WChar) {
+      Builder.defineMacro("_WCHAR_T");
+    }
+  }
+
+public:
+  AIXTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    if (this->PointerWidth == 64) {
+      this->WCharType = this->UnsignedInt;
+    } else {
+      this->WCharType = this->UnsignedShort;
+    }
+    this->UseZeroLengthBitfieldAlignment = true;
+  }
+ 
+  // AIX sets FLT_EVAL_METHOD to be 1
+  unsigned getFloatEvalMethod() const override { return 1; }
+  bool hasInt128Type() const override { return false; }
+};
+
 // Windows target
 template <typename Target>
 class LLVM_LIBRARY_VISIBILITY WindowsTargetInfo : public OSTargetInfo<Target> {
 protected:
   void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
                     MacroBuilder &Builder) const override {
     Builder.defineMacro("_WIN32");
     if (Triple.isArch64Bit())

clang/lib/Basic/Targets/PPC.h

PPC32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
     switch (getTriple().getOS()) {
     case llvm::Triple::Linux:
     case llvm::Triple::FreeBSD:
     case llvm::Triple::NetBSD:
       SizeType = UnsignedInt;
       PtrDiffType = SignedInt;
       IntPtrType = SignedInt;
       break;
+    case llvm::Triple::AIX:
+      SizeType = UnsignedLong;
+      PtrDiffType = SignedLong;
+      IntPtrType = SignedLong;
+      SuitableAlign = 64;
+      break;
     default:
       break;
     }
 
     switch (getTriple().getOS()) {
     case llvm::Triple::FreeBSD:
     case llvm::Triple::NetBSD:
     case llvm::Triple::OpenBSD:
+    // FIXME: -mlong-double-128 is not yet supported on AIX.
+    case llvm::Triple::AIX:
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble();
       break;
     default:
       break;
     }
 
     // PPC32 supports atomics up to 4 bytes.
if ((Triple.getArch() == llvm::Triple::ppc64le)) {
       ABI = "elfv1";
     }
 
     switch (getTriple().getOS()) {
     case llvm::Triple::FreeBSD:
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble();
       break;
+    case llvm::Triple::AIX:
+      // FIXME: -mlong-double-128 is not yet supported on AIX.
+      LongDoubleWidth = LongDoubleAlign = 64;
+      LongDoubleFormat = &llvm::APFloat::IEEEdouble();
+      SuitableAlign = 64;
+      break;
     default:
       break;
     }
 
     // PPC64 supports atomics up to 8 bytes.
     MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
   }
 

 public:
   DarwinPPC64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : DarwinTargetInfo<PPC64TargetInfo>(Triple, Opts) {
     HasAlignMac68kSupport = true;
     resetDataLayout("E-m:o-i64:64-n32:64");
   }
 };
 
+class LLVM_LIBRARY_VISIBILITY AIXPPC32TargetInfo :
+  public AIXTargetInfo<PPC32TargetInfo> {
+public:
+  using AIXTargetInfo::AIXTargetInfo;
+  BuiltinVaListKind getBuiltinVaListKind() const override {
+    return TargetInfo::CharPtrBuiltinVaList;
+  }
+};
+
+class LLVM_LIBRARY_VISIBILITY AIXPPC64TargetInfo :
+  public AIXTargetInfo<PPC64TargetInfo> {
+public:
+  using AIXTargetInfo::AIXTargetInfo;
+};
+
 } // namespace targets
 } // namespace clang
 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_PPC_H

clang/lib/Basic/Targets/PPC.cpp

void PPCTargetInfo::getTargetDefines(const LangOptions &Opts,
 
   // This typically is only for a new enough linker (bfd >= 2.16.2 or gold), but
   // our support post-dates this and it should work on all 64-bit ppc linux
   // platforms. It is guaranteed to work on all elfv2 platforms.
   if (getTriple().getOS() == llvm::Triple::Linux && PointerWidth == 64)
     Builder.defineMacro("_CALL_LINUX", "1");
 
   // Subtarget options.
+  if (!getTriple().isOSAIX()){
     Builder.defineMacro("__NATURAL_ALIGNMENT__");
+  }
   Builder.defineMacro("__REGISTER_PREFIX__", "");
 
   // FIXME: Should be controlled by command line option.
   if (LongDoubleWidth == 128) {
     Builder.defineMacro("__LONG_DOUBLE_128__");
     Builder.defineMacro("__LONGDOUBLE128");
   }
 

clang/test/Driver/types.c

 // Check whether __int128_t and __uint128_t are supported.
 
 // RUN: not %clang -c --target=riscv32-unknown-linux-gnu -fsyntax-only %s \
 // RUN: 2>&1 | FileCheck %s
 
 // RUN: %clang -c --target=riscv32-unknown-linux-gnu -fsyntax-only %s \
 // RUN: -fno-force-enable-int128 -fforce-enable-int128
 
 // RUN: not %clang -c --target=riscv32-unknown-linux-gnu -fsyntax-only %s \
 // RUN: -fforce-enable-int128 -fno-force-enable-int128
 
+// RUN: not %clang -c --target=powerpc-ibm-aix -fsyntax-only %s \
+// RUN: 2>&1 | FileCheck %s
+
+// RUN: not %clang -c --target=powerpc64-ibm-aix -fsyntax-only %s \
+// RUN: 2>&1 | FileCheck %s
+
 void a() {
   __int128_t s;
   __uint128_t t;
 }
 
 // CHECK: error: use of undeclared identifier '__int128_t'
 // CHECK: error: use of undeclared identifier '__uint128_t'

clang/test/Headers/max_align.c

+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// expected-no-diagnostics
+
+#ifndef __BIGGEST_ALIGNMENT__
+#error __BIGGEST_ALIGNMENT__ not defined
+#endif
+
+#include <stddef.h>
+
+_Static_assert(__BIGGEST_ALIGNMENT__ == _Alignof(max_align_t), "");

clang/test/Preprocessor/init.c

 // PPCPOWER9:#define _ARCH_PWR6 1
 // PPCPOWER9-NOT:#define _ARCH_PWR6X 1
 // PPCPOWER9:#define _ARCH_PWR7 1
 // PPCPOWER9:#define _ARCH_PWR9 1
 //
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc64-none-none -target-feature +float128 -target-cpu power9 -fno-signed-char < /dev/null | FileCheck -check-prefix PPC-FLOAT128 %s
 // PPC-FLOAT128:#define __FLOAT128__ 1
 //
+// RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc64-ibm-aix7.1.0.0 -fno-signed-char < /dev/null | FileCheck -match-full-lines -check-prefix PPC64-AIX %s
+//
+// PPC64-AIX:#define _AIX 1
+// PPC64-AIX:#define _ARCH_PPC 1
+// PPC64-AIX:#define _ARCH_PPC64 1
+// PPC64-AIX:#define _BIG_ENDIAN 1
+// PPC64-AIX:#define _IBMR2 1
+// PPC64-AIX:#define _LONG_LONG 1
+// PPC64-AIX:#define _POWER 1
+// PPC64-AIX:#define __64BIT__ 1
+// PPC64-AIX:#define __BIGGEST_ALIGNMENT__ 8 
+// PPC64-AIX:#define __BIG_ENDIAN__ 1
+// PPC64-AIX:#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__
+// PPC64-AIX:#define __CHAR16_TYPE__ unsigned short
+// PPC64-AIX:#define __CHAR32_TYPE__ unsigned int
+// PPC64-AIX:#define __CHAR_BIT__ 8
+// PPC64-AIX:#define __CHAR_UNSIGNED__ 1
+// PPC64-AIX:#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
+// PPC64-AIX:#define __DBL_DIG__ 15
+// PPC64-AIX:#define __DBL_EPSILON__ 2.2204460492503131e-16
+// PPC64-AIX:#define __DBL_HAS_DENORM__ 1
+// PPC64-AIX:#define __DBL_HAS_INFINITY__ 1
+// PPC64-AIX:#define __DBL_HAS_QUIET_NAN__ 1
+// PPC64-AIX:#define __DBL_MANT_DIG__ 53
+// PPC64-AIX:#define __DBL_MAX_10_EXP__ 308
+// PPC64-AIX:#define __DBL_MAX_EXP__ 1024
+// PPC64-AIX:#define __DBL_MAX__ 1.7976931348623157e+308
+// PPC64-AIX:#define __DBL_MIN_10_EXP__ (-307)
+// PPC64-AIX:#define __DBL_MIN_EXP__ (-1021)
+// PPC64-AIX:#define __DBL_MIN__ 2.2250738585072014e-308
+// PPC64-AIX:#define __DECIMAL_DIG__ __LDBL_DECIMAL_DIG__
+// PPC64-AIX:#define __FLT_DENORM_MIN__ 1.40129846e-45F
+// PPC64-AIX:#define __FLT_DIG__ 6
+// PPC64-AIX:#define __FLT_EPSILON__ 1.19209290e-7F
+// PPC64-AIX:#define __FLT_EVAL_METHOD__ 1  
+// PPC64-AIX:#define __FLT_HAS_DENORM__ 1
+// PPC64-AIX:#define __FLT_HAS_INFINITY__ 1
+// PPC64-AIX:#define __FLT_HAS_QUIET_NAN__ 1
+// PPC64-AIX:#define __FLT_MANT_DIG__ 24
+// PPC64-AIX:#define __FLT_MAX_10_EXP__ 38
+// PPC64-AIX:#define __FLT_MAX_EXP__ 128
+// PPC64-AIX:#define __FLT_MAX__ 3.40282347e+38F
+// PPC64-AIX:#define __FLT_MIN_10_EXP__ (-37)
+// PPC64-AIX:#define __FLT_MIN_EXP__ (-125)
+// PPC64-AIX:#define __FLT_MIN__ 1.17549435e-38F
+// PPC64-AIX:#define __FLT_RADIX__ 2
+// PPC64-AIX:#define __INT16_C_SUFFIX__
+// PPC64-AIX:#define __INT16_FMTd__ "hd"
+// PPC64-AIX:#define __INT16_FMTi__ "hi"
+// PPC64-AIX:#define __INT16_MAX__ 32767
+// PPC64-AIX:#define __INT16_TYPE__ short
+// PPC64-AIX:#define __INT32_C_SUFFIX__
+// PPC64-AIX:#define __INT32_FMTd__ "d"
+// PPC64-AIX:#define __INT32_FMTi__ "i"
+// PPC64-AIX:#define __INT32_MAX__ 2147483647
+// PPC64-AIX:#define __INT32_TYPE__ int
+// PPC64-AIX:#define __INT64_C_SUFFIX__ L
+// PPC64-AIX:#define __INT64_FMTd__ "ld"
+// PPC64-AIX:#define __INT64_FMTi__ "li"
+// PPC64-AIX:#define __INT64_MAX__ 9223372036854775807L
+// PPC64-AIX:#define __INT64_TYPE__ long int
+// PPC64-AIX:#define __INT8_C_SUFFIX__
+// PPC64-AIX:#define __INT8_FMTd__ "hhd"
+// PPC64-AIX:#define __INT8_FMTi__ "hhi"
+// PPC64-AIX:#define __INT8_MAX__ 127
+// PPC64-AIX:#define __INT8_TYPE__ signed char
+// PPC64-AIX:#define __INTMAX_C_SUFFIX__ L
+// PPC64-AIX:#define __INTMAX_FMTd__ "ld"
+// PPC64-AIX:#define __INTMAX_FMTi__ "li"
+// PPC64-AIX:#define __INTMAX_MAX__ 9223372036854775807L
+// PPC64-AIX:#define __INTMAX_TYPE__ long int
+// PPC64-AIX:#define __INTMAX_WIDTH__ 64
+// PPC64-AIX:#define __INTPTR_FMTd__ "ld"
+// PPC64-AIX:#define __INTPTR_FMTi__ "li"
+// PPC64-AIX:#define __INTPTR_MAX__ 9223372036854775807L
+// PPC64-AIX:#define __INTPTR_TYPE__ long int
+// PPC64-AIX:#define __INTPTR_WIDTH__ 64
+// PPC64-AIX:#define __INT_FAST16_FMTd__ "hd"
+// PPC64-AIX:#define __INT_FAST16_FMTi__ "hi"
+// PPC64-AIX:#define __INT_FAST16_MAX__ 32767
+// PPC64-AIX:#define __INT_FAST16_TYPE__ short
+// PPC64-AIX:#define __INT_FAST32_FMTd__ "d"
+// PPC64-AIX:#define __INT_FAST32_FMTi__ "i"
+// PPC64-AIX:#define __INT_FAST32_MAX__ 2147483647
+// PPC64-AIX:#define __INT_FAST32_TYPE__ int
+// PPC64-AIX:#define __INT_FAST64_FMTd__ "ld"
+// PPC64-AIX:#define __INT_FAST64_FMTi__ "li"
+// PPC64-AIX:#define __INT_FAST64_MAX__ 9223372036854775807L
+// PPC64-AIX:#define __INT_FAST64_TYPE__ long int
+// PPC64-AIX:#define __INT_FAST8_FMTd__ "hhd"
+// PPC64-AIX:#define __INT_FAST8_FMTi__ "hhi"
+// PPC64-AIX:#define __INT_FAST8_MAX__ 127
+// PPC64-AIX:#define __INT_FAST8_TYPE__ signed char
+// PPC64-AIX:#define __INT_LEAST16_FMTd__ "hd"
+// PPC64-AIX:#define __INT_LEAST16_FMTi__ "hi"
+// PPC64-AIX:#define __INT_LEAST16_MAX__ 32767
+// PPC64-AIX:#define __INT_LEAST16_TYPE__ short
+// PPC64-AIX:#define __INT_LEAST32_FMTd__ "d"
+// PPC64-AIX:#define __INT_LEAST32_FMTi__ "i"
+// PPC64-AIX:#define __INT_LEAST32_MAX__ 2147483647
+// PPC64-AIX:#define __INT_LEAST32_TYPE__ int
+// PPC64-AIX:#define __INT_LEAST64_FMTd__ "ld"
+// PPC64-AIX:#define __INT_LEAST64_FMTi__ "li"
+// PPC64-AIX:#define __INT_LEAST64_MAX__ 9223372036854775807L
+// PPC64-AIX:#define __INT_LEAST64_TYPE__ long int
+// PPC64-AIX:#define __INT_LEAST8_FMTd__ "hhd"
+// PPC64-AIX:#define __INT_LEAST8_FMTi__ "hhi"
+// PPC64-AIX:#define __INT_LEAST8_MAX__ 127
+// PPC64-AIX:#define __INT_LEAST8_TYPE__ signed char
+// PPC64-AIX:#define __INT_MAX__ 2147483647
+// PPC64-AIX:#define __LDBL_DECIMAL_DIG__ 17
+// PPC64-AIX:#define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L 
+// PPC64-AIX:#define __LDBL_DIG__ 15 
+// PPC64-AIX:#define __LDBL_EPSILON__ 2.2204460492503131e-16L 
+// PPC64-AIX:#define __LDBL_HAS_DENORM__ 1
+// PPC64-AIX:#define __LDBL_HAS_INFINITY__ 1
+// PPC64-AIX:#define __LDBL_HAS_QUIET_NAN__ 1
+// PPC64-AIX:#define __LDBL_MANT_DIG__ 53 
+// PPC64-AIX:#define __LDBL_MAX_10_EXP__ 308
+// PPC64-AIX:#define __LDBL_MAX_EXP__ 1024
+// PPC64-AIX:#define __LDBL_MAX__ 1.7976931348623157e+308L 
+// PPC64-AIX:#define __LDBL_MIN_10_EXP__ (-307)
+// PPC64-AIX:#define __LDBL_MIN_EXP__ (-1021)
+// PPC64-AIX:#define __LDBL_MIN__ 2.2250738585072014e-308L
+// PPC64-AIX:#define __LONG_LONG_MAX__ 9223372036854775807LL
+// PPC64-AIX:#define __LONG_MAX__ 9223372036854775807L
+// PPC64-AIX-NOT:#define __NATURAL_ALIGNMENT__ 1
+// PPC64-AIX:#define __POINTER_WIDTH__ 64
+// PPC64-AIX:#define __POWERPC__ 1
+// PPC64-AIX:#define __PPC64__ 1
+// PPC64-AIX:#define __PPC__ 1
+// PPC64-AIX:#define __PTRDIFF_TYPE__ long int
+// PPC64-AIX:#define __PTRDIFF_WIDTH__ 64
+// PPC64-AIX:#define __REGISTER_PREFIX__
+// PPC64-AIX:#define __SCHAR_MAX__ 127
+// PPC64-AIX:#define __SHRT_MAX__ 32767
+// PPC64-AIX:#define __SIG_ATOMIC_MAX__ 2147483647
+// PPC64-AIX:#define __SIG_ATOMIC_WIDTH__ 32
+// PPC64-AIX:#define __SIZEOF_DOUBLE__ 8
+// PPC64-AIX:#define __SIZEOF_FLOAT__ 4
+// PPC64-AIX:#define __SIZEOF_INT__ 4
+// PPC64-AIX:#define __SIZEOF_LONG_DOUBLE__ 8 
+// PPC64-AIX:#define __SIZEOF_LONG_LONG__ 8
+// PPC64-AIX:#define __SIZEOF_LONG__ 8
+// PPC64-AIX:#define __SIZEOF_POINTER__ 8
+// PPC64-AIX:#define __SIZEOF_PTRDIFF_T__ 8
+// PPC64-AIX:#define __SIZEOF_SHORT__ 2
+// PPC64-AIX:#define __SIZEOF_SIZE_T__ 8
+// PPC64-AIX:#define __SIZEOF_WCHAR_T__ 4
+// PPC64-AIX:#define __SIZEOF_WINT_T__ 4
+// PPC64-AIX:#define __SIZE_MAX__ 18446744073709551615UL
+// PPC64-AIX:#define __SIZE_TYPE__ long unsigned int
+// PPC64-AIX:#define __SIZE_WIDTH__ 64
+// PPC64-AIX:#define __UINT16_C_SUFFIX__
+// PPC64-AIX:#define __UINT16_MAX__ 65535
+// PPC64-AIX:#define __UINT16_TYPE__ unsigned short
+// PPC64-AIX:#define __UINT32_C_SUFFIX__ U
+// PPC64-AIX:#define __UINT32_MAX__ 4294967295U
+// PPC64-AIX:#define __UINT32_TYPE__ unsigned int
+// PPC64-AIX:#define __UINT64_C_SUFFIX__ UL
+// PPC64-AIX:#define __UINT64_MAX__ 18446744073709551615UL
+// PPC64-AIX:#define __UINT64_TYPE__ long unsigned int
+// PPC64-AIX:#define __UINT8_C_SUFFIX__
+// PPC64-AIX:#define __UINT8_MAX__ 255
+// PPC64-AIX:#define __UINT8_TYPE__ unsigned char
+// PPC64-AIX:#define __UINTMAX_C_SUFFIX__ UL
+// PPC64-AIX:#define __UINTMAX_MAX__ 18446744073709551615UL
+// PPC64-AIX:#define __UINTMAX_TYPE__ long unsigned int
+// PPC64-AIX:#define __UINTMAX_WIDTH__ 64
+// PPC64-AIX:#define __UINTPTR_MAX__ 18446744073709551615UL
+// PPC64-AIX:#define __UINTPTR_TYPE__ long unsigned int
+// PPC64-AIX:#define __UINTPTR_WIDTH__ 64
+// PPC64-AIX:#define __UINT_FAST16_MAX__ 65535
+// PPC64-AIX:#define __UINT_FAST16_TYPE__ unsigned short
+// PPC64-AIX:#define __UINT_FAST32_MAX__ 4294967295U
+// PPC64-AIX:#define __UINT_FAST32_TYPE__ unsigned int
+// PPC64-AIX:#define __UINT_FAST64_MAX__ 18446744073709551615UL
+// PPC64-AIX:#define __UINT_FAST64_TYPE__ long unsigned int
+// PPC64-AIX:#define __UINT_FAST8_MAX__ 255
+// PPC64-AIX:#define __UINT_FAST8_TYPE__ unsigned char
+// PPC64-AIX:#define __UINT_LEAST16_MAX__ 65535
+// PPC64-AIX:#define __UINT_LEAST16_TYPE__ unsigned short
+// PPC64-AIX:#define __UINT_LEAST32_MAX__ 4294967295U
+// PPC64-AIX:#define __UINT_LEAST32_TYPE__ unsigned int
+// PPC64-AIX:#define __UINT_LEAST64_MAX__ 18446744073709551615UL
+// PPC64-AIX:#define __UINT_LEAST64_TYPE__ long unsigned int
+// PPC64-AIX:#define __UINT_LEAST8_MAX__ 255
+// PPC64-AIX:#define __UINT_LEAST8_TYPE__ unsigned char
+// PPC64-AIX:#define __USER_LABEL_PREFIX__
+// PPC64-AIX:#define __WCHAR_MAX__ 4294967295U
+// PPC64-AIX:#define __WCHAR_TYPE__ unsigned int
+// PPC64-AIX:#define __WCHAR_WIDTH__ 32
+// PPC64-AIX:#define __WINT_TYPE__ int
+// PPC64-AIX:#define __WINT_WIDTH__ 32
+// PPC64-AIX:#define __powerpc64__ 1
+// PPC64-AIX:#define __powerpc__ 1
+// PPC64-AIX:#define __ppc64__ 1
+// PPC64-AIX:#define __ppc__ 1
+//
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc64-unknown-linux-gnu -fno-signed-char < /dev/null | FileCheck -match-full-lines -check-prefix PPC64-LINUX %s
 //
 // PPC64-LINUX:#define _ARCH_PPC 1
 // PPC64-LINUX:#define _ARCH_PPC64 1
 // PPC64-LINUX:#define _BIG_ENDIAN 1
 // PPC64-LINUX:#define _CALL_LINUX 1
 // PPC64-LINUX:#define _LP64 1
 // PPC64-LINUX:#define __BIGGEST_ALIGNMENT__ 16

 // PPC:#define __USER_LABEL_PREFIX__
 // PPC:#define __WCHAR_MAX__ 2147483647
 // PPC:#define __WCHAR_TYPE__ int
 // PPC:#define __WCHAR_WIDTH__ 32
 // PPC:#define __WINT_TYPE__ int
 // PPC:#define __WINT_WIDTH__ 32
 // PPC:#define __ppc__ 1
 //
+// RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc-ibm-aix7.1.0.0 -fno-signed-char < /dev/null | FileCheck -match-full-lines -check-prefix PPC-AIX %s
+//
+// PPC-AIX:#define _AIX 1
+// PPC-AIX:#define _ARCH_PPC 1
+// PPC-AIX:#define _BIG_ENDIAN 1
+// PPC-AIX:#define _IBMR2 1
+// PPC-AIX:#define _LONG_LONG 1
+// PPC-AIX:#define _POWER 1
+// PPC-AIX:#define __BIGGEST_ALIGNMENT__ 8
+// PPC-AIX:#define __BIG_ENDIAN__ 1
+// PPC-AIX:#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__
+// PPC-AIX:#define __CHAR16_TYPE__ unsigned short
+// PPC-AIX:#define __CHAR32_TYPE__ unsigned int
+// PPC-AIX:#define __CHAR_BIT__ 8
+// PPC-AIX:#define __CHAR_UNSIGNED__ 1
+// PPC-AIX:#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
+// PPC-AIX:#define __DBL_DIG__ 15
+// PPC-AIX:#define __DBL_EPSILON__ 2.2204460492503131e-16
+// PPC-AIX:#define __DBL_HAS_DENORM__ 1
+// PPC-AIX:#define __DBL_HAS_INFINITY__ 1
+// PPC-AIX:#define __DBL_HAS_QUIET_NAN__ 1
+// PPC-AIX:#define __DBL_MANT_DIG__ 53
+// PPC-AIX:#define __DBL_MAX_10_EXP__ 308
+// PPC-AIX:#define __DBL_MAX_EXP__ 1024
+// PPC-AIX:#define __DBL_MAX__ 1.7976931348623157e+308
+// PPC-AIX:#define __DBL_MIN_10_EXP__ (-307)
+// PPC-AIX:#define __DBL_MIN_EXP__ (-1021)
+// PPC-AIX:#define __DBL_MIN__ 2.2250738585072014e-308
+// PPC-AIX:#define __DECIMAL_DIG__ __LDBL_DECIMAL_DIG__
+// PPC-AIX:#define __FLT_DENORM_MIN__ 1.40129846e-45F
+// PPC-AIX:#define __FLT_DIG__ 6
+// PPC-AIX:#define __FLT_EPSILON__ 1.19209290e-7F
+// PPC-AIX:#define __FLT_EVAL_METHOD__ 1 
+// PPC-AIX:#define __FLT_HAS_DENORM__ 1
+// PPC-AIX:#define __FLT_HAS_INFINITY__ 1
+// PPC-AIX:#define __FLT_HAS_QUIET_NAN__ 1
+// PPC-AIX:#define __FLT_MANT_DIG__ 24
+// PPC-AIX:#define __FLT_MAX_10_EXP__ 38
+// PPC-AIX:#define __FLT_MAX_EXP__ 128
+// PPC-AIX:#define __FLT_MAX__ 3.40282347e+38F
+// PPC-AIX:#define __FLT_MIN_10_EXP__ (-37)
+// PPC-AIX:#define __FLT_MIN_EXP__ (-125)
+// PPC-AIX:#define __FLT_MIN__ 1.17549435e-38F
+// PPC-AIX:#define __FLT_RADIX__ 2
+// PPC-AIX:#define __INT16_C_SUFFIX__
+// PPC-AIX:#define __INT16_FMTd__ "hd"
+// PPC-AIX:#define __INT16_FMTi__ "hi"
+// PPC-AIX:#define __INT16_MAX__ 32767
+// PPC-AIX:#define __INT16_TYPE__ short
+// PPC-AIX:#define __INT32_C_SUFFIX__
+// PPC-AIX:#define __INT32_FMTd__ "d"
+// PPC-AIX:#define __INT32_FMTi__ "i"
+// PPC-AIX:#define __INT32_MAX__ 2147483647
+// PPC-AIX:#define __INT32_TYPE__ int
+// PPC-AIX:#define __INT64_C_SUFFIX__ LL
+// PPC-AIX:#define __INT64_FMTd__ "lld"
+// PPC-AIX:#define __INT64_FMTi__ "lli"
+// PPC-AIX:#define __INT64_MAX__ 9223372036854775807LL
+// PPC-AIX:#define __INT64_TYPE__ long long int
+// PPC-AIX:#define __INT8_C_SUFFIX__
+// PPC-AIX:#define __INT8_FMTd__ "hhd"
+// PPC-AIX:#define __INT8_FMTi__ "hhi"
+// PPC-AIX:#define __INT8_MAX__ 127
+// PPC-AIX:#define __INT8_TYPE__ signed char
+// PPC-AIX:#define __INTMAX_C_SUFFIX__ LL
+// PPC-AIX:#define __INTMAX_FMTd__ "lld"
+// PPC-AIX:#define __INTMAX_FMTi__ "lli"
+// PPC-AIX:#define __INTMAX_MAX__ 9223372036854775807LL
+// PPC-AIX:#define __INTMAX_TYPE__ long long int
+// PPC-AIX:#define __INTMAX_WIDTH__ 64
+// PPC-AIX:#define __INTPTR_FMTd__ "ld"
+// PPC-AIX:#define __INTPTR_FMTi__ "li"
+// PPC-AIX:#define __INTPTR_MAX__ 2147483647L 
+// PPC-AIX:#define __INTPTR_TYPE__ long int
+// PPC-AIX:#define __INTPTR_WIDTH__ 32 
+// PPC-AIX:#define __INT_FAST16_FMTd__ "hd"
+// PPC-AIX:#define __INT_FAST16_FMTi__ "hi"
+// PPC-AIX:#define __INT_FAST16_MAX__ 32767
+// PPC-AIX:#define __INT_FAST16_TYPE__ short
+// PPC-AIX:#define __INT_FAST32_FMTd__ "d"
+// PPC-AIX:#define __INT_FAST32_FMTi__ "i"
+// PPC-AIX:#define __INT_FAST32_MAX__ 2147483647
+// PPC-AIX:#define __INT_FAST32_TYPE__ int
+// PPC-AIX:#define __INT_FAST64_FMTd__ "lld"
+// PPC-AIX:#define __INT_FAST64_FMTi__ "lli"
+// PPC-AIX:#define __INT_FAST64_MAX__ 9223372036854775807LL
+// PPC-AIX:#define __INT_FAST64_TYPE__ long long int
+// PPC-AIX:#define __INT_FAST8_FMTd__ "hhd"
+// PPC-AIX:#define __INT_FAST8_FMTi__ "hhi"
+// PPC-AIX:#define __INT_FAST8_MAX__ 127
+// PPC-AIX:#define __INT_FAST8_TYPE__ signed char
+// PPC-AIX:#define __INT_LEAST16_FMTd__ "hd"
+// PPC-AIX:#define __INT_LEAST16_FMTi__ "hi"
+// PPC-AIX:#define __INT_LEAST16_MAX__ 32767
+// PPC-AIX:#define __INT_LEAST16_TYPE__ short
+// PPC-AIX:#define __INT_LEAST32_FMTd__ "d"
+// PPC-AIX:#define __INT_LEAST32_FMTi__ "i"
+// PPC-AIX:#define __INT_LEAST32_MAX__ 2147483647
+// PPC-AIX:#define __INT_LEAST32_TYPE__ int
+// PPC-AIX:#define __INT_LEAST64_FMTd__ "lld"
+// PPC-AIX:#define __INT_LEAST64_FMTi__ "lli"
+// PPC-AIX:#define __INT_LEAST64_MAX__ 9223372036854775807LL
+// PPC-AIX:#define __INT_LEAST64_TYPE__ long long int
+// PPC-AIX:#define __INT_LEAST8_FMTd__ "hhd"
+// PPC-AIX:#define __INT_LEAST8_FMTi__ "hhi"
+// PPC-AIX:#define __INT_LEAST8_MAX__ 127
+// PPC-AIX:#define __INT_LEAST8_TYPE__ signed char
+// PPC-AIX:#define __INT_MAX__ 2147483647
+// PPC-AIX:#define __LDBL_DECIMAL_DIG__ 17
+// PPC-AIX:#define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L 
+// PPC-AIX:#define __LDBL_DIG__ 15 
+// PPC-AIX:#define __LDBL_EPSILON__ 2.2204460492503131e-16L 
+// PPC-AIX:#define __LDBL_HAS_DENORM__ 1
+// PPC-AIX:#define __LDBL_HAS_INFINITY__ 1
+// PPC-AIX:#define __LDBL_HAS_QUIET_NAN__ 1
+// PPC-AIX:#define __LDBL_MANT_DIG__ 53 
+// PPC-AIX:#define __LDBL_MAX_10_EXP__ 308
+// PPC-AIX:#define __LDBL_MAX_EXP__ 1024
+// PPC-AIX:#define __LDBL_MAX__ 1.7976931348623157e+308L 
+// PPC-AIX:#define __LDBL_MIN_10_EXP__ (-307)
+// PPC-AIX:#define __LDBL_MIN_EXP__ (-1021)
+// PPC-AIX:#define __LDBL_MIN__ 2.2250738585072014e-308L 
+// PPC-AIX:#define __LONG_LONG_MAX__ 9223372036854775807LL
+// PPC-AIX:#define __LONG_MAX__ 2147483647L
+// PPC-AIX-NOT:#define __NATURAL_ALIGNMENT__ 1
+// PPC-AIX:#define __POINTER_WIDTH__ 32
+// PPC-AIX:#define __POWERPC__ 1
+// PPC-AIX:#define __PPC__ 1
+// PPC-AIX:#define __PTRDIFF_TYPE__ long int
+// PPC-AIX:#define __PTRDIFF_WIDTH__ 32 
+// PPC-AIX:#define __REGISTER_PREFIX__
+// PPC-AIX:#define __SCHAR_MAX__ 127
+// PPC-AIX:#define __SHRT_MAX__ 32767
+// PPC-AIX:#define __SIG_ATOMIC_MAX__ 2147483647
+// PPC-AIX:#define __SIG_ATOMIC_WIDTH__ 32
+// PPC-AIX:#define __SIZEOF_DOUBLE__ 8
+// PPC-AIX:#define __SIZEOF_FLOAT__ 4
+// PPC-AIX:#define __SIZEOF_INT__ 4
+// PPC-AIX:#define __SIZEOF_LONG_DOUBLE__ 8 
+// PPC-AIX:#define __SIZEOF_LONG_LONG__ 8
+// PPC-AIX:#define __SIZEOF_LONG__ 4
+// PPC-AIX:#define __SIZEOF_POINTER__ 4
+// PPC-AIX:#define __SIZEOF_PTRDIFF_T__ 4
+// PPC-AIX:#define __SIZEOF_SHORT__ 2
+// PPC-AIX:#define __SIZEOF_SIZE_T__ 4
+// PPC-AIX:#define __SIZEOF_WCHAR_T__ 2 
+// PPC-AIX:#define __SIZEOF_WINT_T__ 4
+// PPC-AIX:#define __SIZE_MAX__ 4294967295UL 
+// PPC-AIX:#define __SIZE_TYPE__ long unsigned int
+// PPC-AIX:#define __SIZE_WIDTH__ 32
+// PPC-AIX:#define __UINT16_C_SUFFIX__
+// PPC-AIX:#define __UINT16_MAX__ 65535
+// PPC-AIX:#define __UINT16_TYPE__ unsigned short
+// PPC-AIX:#define __UINT32_C_SUFFIX__ U
+// PPC-AIX:#define __UINT32_MAX__ 4294967295U
+// PPC-AIX:#define __UINT32_TYPE__ unsigned int
+// PPC-AIX:#define __UINT64_C_SUFFIX__ ULL
+// PPC-AIX:#define __UINT64_MAX__ 18446744073709551615ULL
+// PPC-AIX:#define __UINT64_TYPE__ long long unsigned int
+// PPC-AIX:#define __UINT8_C_SUFFIX__
+// PPC-AIX:#define __UINT8_MAX__ 255
+// PPC-AIX:#define __UINT8_TYPE__ unsigned char
+// PPC-AIX:#define __UINTMAX_C_SUFFIX__ ULL
+// PPC-AIX:#define __UINTMAX_MAX__ 18446744073709551615ULL
+// PPC-AIX:#define __UINTMAX_TYPE__ long long unsigned int
+// PPC-AIX:#define __UINTMAX_WIDTH__ 64
+// PPC-AIX:#define __UINTPTR_MAX__ 4294967295UL
+// PPC-AIX:#define __UINTPTR_TYPE__ long unsigned int
+// PPC-AIX:#define __UINTPTR_WIDTH__ 32
+// PPC-AIX:#define __UINT_FAST16_MAX__ 65535
+// PPC-AIX:#define __UINT_FAST16_TYPE__ unsigned short
+// PPC-AIX:#define __UINT_FAST32_MAX__ 4294967295U
+// PPC-AIX:#define __UINT_FAST32_TYPE__ unsigned int
+// PPC-AIX:#define __UINT_FAST64_MAX__ 18446744073709551615ULL
+// PPC-AIX:#define __UINT_FAST64_TYPE__ long long unsigned int
+// PPC-AIX:#define __UINT_FAST8_MAX__ 255
+// PPC-AIX:#define __UINT_FAST8_TYPE__ unsigned char
+// PPC-AIX:#define __UINT_LEAST16_MAX__ 65535
+// PPC-AIX:#define __UINT_LEAST16_TYPE__ unsigned short
+// PPC-AIX:#define __UINT_LEAST32_MAX__ 4294967295U
+// PPC-AIX:#define __UINT_LEAST32_TYPE__ unsigned int
+// PPC-AIX:#define __UINT_LEAST64_MAX__ 18446744073709551615ULL
+// PPC-AIX:#define __UINT_LEAST64_TYPE__ long long unsigned int
+// PPC-AIX:#define __UINT_LEAST8_MAX__ 255
+// PPC-AIX:#define __UINT_LEAST8_TYPE__ unsigned char
+// PPC-AIX:#define __USER_LABEL_PREFIX__
+// PPC-AIX:#define __WCHAR_MAX__ 65535
+// PPC-AIX:#define __WCHAR_TYPE__ unsigned short
+// PPC-AIX:#define __WCHAR_WIDTH__ 16
+// PPC-AIX:#define __WINT_TYPE__ int
+// PPC-AIX:#define __WINT_WIDTH__ 32
+// PPC-AIX:#define __powerpc__ 1
+// PPC-AIX:#define __ppc__ 1
+//
+// RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -triple=powerpc-ibm-aix7.1.0.0 -fno-signed-char < /dev/null | FileCheck -match-full-lines -check-prefix PPC-AIX-CXX %s
+//
+// PPC-AIX-CXX:#define _WCHAR_T 1
+//
+// RUN: %clang_cc1 -x c++ -fno-wchar -E -dM -ffreestanding -triple=powerpc-ibm-aix7.1.0.0 < /dev/null | FileCheck -match-full-lines -check-prefix PPC-AIX-NOWCHAR %s
+// RUN: %clang_cc1 -x c -E -dM -ffreestanding -triple=powerpc-ibm-aix7.1.0.0 < /dev/null | FileCheck -match-full-lines -check-prefix PPC-AIX-NOWCHAR %s
+// 
+// PPC-AIX-NOWCHAR-NOT:#define _WCHAR_T 1
+//
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc-unknown-linux-gnu -fno-signed-char < /dev/null | FileCheck -match-full-lines -check-prefix PPC-LINUX %s
 //
 // PPC-LINUX:#define _ARCH_PPC 1
 // PPC-LINUX:#define _BIG_ENDIAN 1
 // PPC-LINUX-NOT:#define _LP64
 // PPC-LINUX:#define __BIGGEST_ALIGNMENT__ 16
 // PPC-LINUX:#define __BIG_ENDIAN__ 1
 // PPC-LINUX:#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__

clang/test/Sema/varargs-aix.c

+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple powerpc-ibm-aix
+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple powerpc64-ibm-aix
+// expected-no-diagnostics
+
+extern __builtin_va_list ap;
+extern char *ap;