From 4e91899e7bfc296a959d9d1c62c01d7828e7a6c8 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 27 Nov 2012 02:58:24 +0000
Subject: [PATCH] Fix the definition of the vfork() builtin on Haiku.  PR14378.

llvm-svn: 168674
---
 clang/include/clang/AST/ASTContext.h   | 4 ++++
 clang/include/clang/Basic/Builtins.def | 3 ++-
 clang/include/clang/Basic/TargetInfo.h | 5 +++--
 clang/lib/AST/ASTContext.cpp           | 9 +++++++++
 clang/lib/Basic/TargetInfo.cpp         | 1 +
 clang/lib/Basic/Targets.cpp            | 1 +
 6 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/clang/include/clang/AST/ASTContext.h b/clang/include/clang/AST/ASTContext.h
index 2342813..1503090 100644
--- a/clang/include/clang/AST/ASTContext.h
+++ b/clang/include/clang/AST/ASTContext.h
@@ -1109,6 +1109,10 @@ public:
   /// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
   QualType getPointerDiffType() const;
 
+  /// \brief Return the unique type for "pid_t" defined in
+  /// <sys/types.h>. We need this to compute the correct type for vfork().
+  QualType getProcessIDType() const;
+
   /// \brief Return the C structure type used to represent constant CFStrings.
   QualType getCFConstantStringType() const;
 
diff --git a/clang/include/clang/Basic/Builtins.def b/clang/include/clang/Basic/Builtins.def
index e278137..d48eadc 100644
--- a/clang/include/clang/Basic/Builtins.def
+++ b/clang/include/clang/Basic/Builtins.def
@@ -41,6 +41,7 @@
 //  J -> jmp_buf
 //  SJ -> sigjmp_buf
 //  K -> ucontext_t
+//  p -> pid_t
 //  . -> "...".  This may only occur at the end of the function list.
 //
 // Types may be prefixed with the following modifiers:
@@ -737,7 +738,7 @@ LIBBUILTIN(strcasecmp, "icC*cC*", "f",     "strings.h", ALL_LANGUAGES)
 LIBBUILTIN(strncasecmp, "icC*cC*z", "f",   "strings.h", ALL_LANGUAGES)
 // POSIX unistd.h
 LIBBUILTIN(_exit, "vi",           "fr",    "unistd.h", ALL_LANGUAGES)
-LIBBUILTIN(vfork, "i",            "fj",    "unistd.h", ALL_LANGUAGES)
+LIBBUILTIN(vfork, "p",            "fj",    "unistd.h", ALL_LANGUAGES)
 // POSIX setjmp.h
 
 // In some systems setjmp is a macro that expands to _setjmp. We undefine
diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index a299c40..4a12381 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -172,7 +172,8 @@ public:
 
 protected:
   IntType SizeType, IntMaxType, UIntMaxType, PtrDiffType, IntPtrType, WCharType,
-          WIntType, Char16Type, Char32Type, Int64Type, SigAtomicType;
+          WIntType, Char16Type, Char32Type, Int64Type, SigAtomicType,
+          ProcessIDType;
 
   /// \brief Whether Objective-C's built-in boolean type should be signed char.
   ///
@@ -213,7 +214,7 @@ public:
   IntType getChar32Type() const { return Char32Type; }
   IntType getInt64Type() const { return Int64Type; }
   IntType getSigAtomicType() const { return SigAtomicType; }
-
+  IntType getProcessIDType() const { return ProcessIDType; }
 
   /// \brief Return the width (in bits) of the specified integer type enum.
   ///
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 5a92250..c4dbf5d 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -3534,6 +3534,12 @@ QualType ASTContext::getPointerDiffType() const {
   return getFromTargetType(Target->getPtrDiffType(0));
 }
 
+/// \brief Return the unique type for "pid_t" defined in
+/// <sys/types.h>. We need this to compute the correct type for vfork().
+QualType ASTContext::getProcessIDType() const {
+  return getFromTargetType(Target->getProcessIDType());
+}
+
 //===----------------------------------------------------------------------===//
 //                              Type Operators
 //===----------------------------------------------------------------------===//
@@ -7247,6 +7253,9 @@ static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context,
       return QualType();
     }
     break;
+  case 'p':
+    Type = Context.getProcessIDType();
+    break;
   }
 
   // If there are modifiers and if we're allowed to parse them, go for it.
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 3257526..83d4e2b 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -60,6 +60,7 @@ TargetInfo::TargetInfo(const std::string &T) : TargetOpts(), Triple(T)
   Char32Type = UnsignedInt;
   Int64Type = SignedLongLong;
   SigAtomicType = SignedInt;
+  ProcessIDType = SignedInt;
   UseSignedCharForObjCBool = true;
   UseBitFieldTypeAlignment = true;
   UseZeroLengthBitfieldAlignment = false;
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 2091001..ff7c4d5 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -2781,6 +2781,7 @@ public:
     SizeType = UnsignedLong;
     IntPtrType = SignedLong;
     PtrDiffType = SignedLong;
+    ProcessIDType = SignedLong;
     this->UserLabelPrefix = "";
     this->TLSSupported = false;
   }
-- 
2.7.4