[clang] Add getSignedSizeType method

C11 standard refers to the signed counterpart of the type size_t in
the paragraph 7.21.6.1 where it defines d, i, o, u, x, or x conversion specifiers
(in printf format string).
In Clang there is a FIXME (in lib/Analysis/PrintfFormatString.cpp) for this case
(which is not handled correctly at the moment).
This diff adds getSignedSizeType method to TargetInfo and exposes it
in ASTContext similarly to how it is done for getSizeType.
lib/Analysis/PrintfFormatString.cpp will be changed in a separate commit.

Differential revision: https://reviews.llvm.org/D35378

Test plan: make check-all

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@308037 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/AST/ASTContext.h b/include/clang/AST/ASTContext.h
index 3b46d31458ceecc21f737a4d3d0e0f7a25f9e78c..703f588c5663513dcb2cde0db07e188af3badd8b 100644 (file)
--- a/include/clang/AST/ASTContext.h
+++ b/include/clang/AST/ASTContext.h
@@ -1441,6 +1441,10 @@ public:
   /// The sizeof operator requires this (C99 6.5.3.4p4).
   CanQualType getSizeType() const;
 
+  /// \brief Return the unique signed counterpart of 
+  /// the integer type corresponding to size_t.
+  CanQualType getSignedSizeType() const;
+
   /// \brief Return the unique type for "intmax_t" (C99 7.18.1.5), defined in
   /// <stdint.h>.
   CanQualType getIntMaxType() const;

diff --git a/include/clang/Basic/TargetInfo.h b/include/clang/Basic/TargetInfo.h
index 5885532b91db68a22972ba919410cdd92d582f96..d1a9ea85dbe969c5fa420eaaf9e9ce7e3d4bf2a6 100644 (file)
--- a/include/clang/Basic/TargetInfo.h
+++ b/include/clang/Basic/TargetInfo.h
@@ -226,6 +226,20 @@ protected:
 
 public:
   IntType getSizeType() const { return SizeType; }
+  IntType getSignedSizeType() const {
+    switch (SizeType) {
+    case UnsignedShort:
+      return SignedShort;
+    case UnsignedInt:
+      return SignedInt;
+    case UnsignedLong:
+      return SignedLong;
+    case UnsignedLongLong:
+      return SignedLongLong;
+    default:
+      llvm_unreachable("Invalid SizeType");
+    }
+  }
   IntType getIntMaxType() const { return IntMaxType; }
   IntType getUIntMaxType() const {
     return getCorrespondingUnsignedType(IntMaxType);

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index fd9723298fca96db29e2e03bbbdeea3a87fb4bcc..c60373c5a90a4f54de70561a818f0b87996bc0bd 100644 (file)
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -4525,6 +4525,12 @@ CanQualType ASTContext::getSizeType() const {
   return getFromTargetType(Target->getSizeType());
 }
 
+/// Return the unique signed counterpart of the integer type 
+/// corresponding to size_t.
+CanQualType ASTContext::getSignedSizeType() const {
+  return getFromTargetType(Target->getSignedSizeType());
+}
+
 /// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5).
 CanQualType ASTContext::getIntMaxType() const {
   return getFromTargetType(Target->getIntMaxType());