[AArch64] Change int64_t from 'long long int' to 'long int' for AArch64 target.

Most 64-bit targets define int64_t as long int, and AArch64 should
make same definition to follow LP64 model. In GNU tool chain, int64_t
is defined as long int for 64-bit target. So to get consistent with GNU,
it's better Changing int64_t from 'long long int' to 'long int',
otherwise clang will get different name mangling suffix compared with g++.

llvm-svn: 202004

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index a1f2e1f4ab6..f259ea1ceca 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -7526,6 +7526,19 @@ static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context,
       assert(HowLong <= 2 && "Can't have LLLL modifier");
       ++HowLong;
       break;
+    case 'W':
+      // This modifier represents int64 type.
+      assert(HowLong == 0 && "Can't use both 'L' and 'W' modifiers!");
+      switch (Context.getTargetInfo().getInt64Type()) {
+      default:
+        llvm_unreachable("Unexpected integer type");
+      case TargetInfo::SignedLong:
+        HowLong = 1;
+        break;
+      case TargetInfo::SignedLongLong:
+        HowLong = 2;
+        break;
+      }
     }
   }