AAPCS compliance - 32-bit wchar_t should be unsigned for both aapcs and aapcs-linux.

Original behaviour of defining wchar_t as signed int has been kept for apcs-gnu as I don't have any spec for this to validate against.

llvm-svn: 145102

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 06e79261e9c..1dcdf93ba70 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -2404,6 +2404,8 @@ public:
   {
     SizeType = UnsignedInt;
     PtrDiffType = SignedInt;
+    // AAPCS 7.1.1, ARM-Linux ABI 2.4: type of wchar_t is unsigned int.
+    WCharType = UnsignedInt;
 
     // {} in inline assembly are neon specifiers, not assembly variant
     // specifiers.
@@ -2442,6 +2444,9 @@ public:
       DoubleAlign = LongLongAlign = LongDoubleAlign = 32;
       SizeType = UnsignedLong;
 
+      // Revert to using SignedInt on apcs-gnu to comply with existing behaviour.
+      WCharType = SignedInt;
+
       // Do not respect the alignment of bit-field types when laying out
       // structures. This corresponds to PCC_BITFIELD_TYPE_MATTERS in gcc.
       UseBitFieldTypeAlignment = false;