diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -118,10 +118,12 @@
   /// Ident_super - IdentifierInfo for "super", to support fast
   /// comparison.
   IdentifierInfo *Ident_super;
-  /// Ident_vector, Ident_bool - cached IdentifierInfos for "vector" and
-  /// "bool" fast comparison.  Only present if AltiVec or ZVector are enabled.
+  /// Ident_vector, Ident_bool, Ident_Bool - cached IdentifierInfos for "vector"
+  /// and "bool" fast comparison.  Only present if AltiVec or ZVector are
+  /// enabled.
   IdentifierInfo *Ident_vector;
   IdentifierInfo *Ident_bool;
+  IdentifierInfo *Ident_Bool;
   /// Ident_pixel - cached IdentifierInfos for "pixel" fast comparison.
   /// Only present if AltiVec enabled.
   IdentifierInfo *Ident_pixel;
@@ -879,6 +881,7 @@
 
     if (Tok.getIdentifierInfo() != Ident_vector &&
         Tok.getIdentifierInfo() != Ident_bool &&
+        Tok.getIdentifierInfo() != Ident_Bool &&
         (!getLangOpts().AltiVec || Tok.getIdentifierInfo() != Ident_pixel))
       return false;
 
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -7334,6 +7334,7 @@
   case tok::kw_float:
   case tok::kw_double:
   case tok::kw_bool:
+  case tok::kw__Bool:
   case tok::kw___bool:
   case tok::kw___pixel:
     Tok.setKind(tok::kw___vector);
@@ -7343,7 +7344,8 @@
       Tok.setKind(tok::kw___vector);
       return true;
     }
-    if (Next.getIdentifierInfo() == Ident_bool) {
+    if (Next.getIdentifierInfo() == Ident_bool ||
+        Next.getIdentifierInfo() == Ident_Bool) {
       Tok.setKind(tok::kw___vector);
       return true;
     }
@@ -7368,6 +7370,7 @@
     case tok::kw_float:
     case tok::kw_double:
     case tok::kw_bool:
+    case tok::kw__Bool:
     case tok::kw___bool:
     case tok::kw___pixel:
       isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
@@ -7377,8 +7380,10 @@
         isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
         return true;
       }
-      if (Next.getIdentifierInfo() == Ident_bool) {
-        isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
+      if (Next.getIdentifierInfo() == Ident_bool ||
+          Next.getIdentifierInfo() == Ident_Bool) {
+        isInvalid =
+            DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
         return true;
       }
       break;
diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -503,10 +503,12 @@
 
   Ident_vector = nullptr;
   Ident_bool = nullptr;
+  Ident_Bool = nullptr;
   Ident_pixel = nullptr;
   if (getLangOpts().AltiVec || getLangOpts().ZVector) {
     Ident_vector = &PP.getIdentifierTable().get("vector");
     Ident_bool = &PP.getIdentifierTable().get("bool");
+    Ident_Bool = &PP.getIdentifierTable().get("_Bool");
   }
   if (getLangOpts().AltiVec)
     Ident_pixel = &PP.getIdentifierTable().get("pixel");
diff --git a/clang/test/Parser/altivec-bool.c b/clang/test/Parser/altivec-bool.c
new file mode 100644
--- /dev/null
+++ b/clang/test/Parser/altivec-bool.c
@@ -0,0 +1,23 @@
+// RUN: %clang_cc1 -triple=powerpc64-unknown-linux-gnu \
+// RUN:            -target-feature +altivec -fsyntax-only %s
+// RUN: %clang_cc1 -triple=powerpc64le-unknown-linux-gnu \
+// RUN:            -target-feature +altivec -fsyntax-only %s
+// RUN: %clang_cc1 -triple=powerpc64-ibm-aix-xcoff \
+// RUN:            -target-feature +altivec -fsyntax-only %s
+// RUN: %clang_cc1 -triple=powerpc-ibm-aix-xcoff \
+// RUN:            -target-feature +altivec -fsyntax-only %s
+// RUN: %clang_cc1 -triple=powerpc-unknown-linux-gnu \
+// RUN:            -target-feature +altivec -fsyntax-only %s
+// RUN: %clang_cc1 -triple=s390x-linux-gnu -target-cpu arch11 \
+// RUN:            -fzvector -fsyntax-only %s
+// RUN: %clang_cc1 -triple=s390x-ibm-zos -target-cpu arch11 \
+// RUN:            -fzvector -fsyntax-only %s
+
+__vector bool char bc;
+__vector bool short bsh;
+__vector bool short int bshi;
+__vector bool int bi;
+__vector _Bool char bc;
+__vector _Bool short bsh;
+__vector _Bool short int bshi;
+__vector _Bool int bi;