1 files changed, 6 insertions, 1 deletions
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 305dc7c6450..95f7d581024 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -1037,6 +1037,9 @@ public:
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble;
     }
+
+    // PPC32 supports atomics up to 4 bytes.
+    MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 32;
   }
 
   virtual BuiltinVaListKind getBuiltinVaListKind() const {
@@ -1065,7 +1068,9 @@ public:
       DescriptionString = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-"
                           "i64:64:64-f32:32:32-f64:64:64-f128:128:128-"
                           "v128:128:128-n32:64";
-    
+
+    // PPC64 supports atomics up to 8 bytes.
+    MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
   }
   virtual BuiltinVaListKind getBuiltinVaListKind() const {
     return TargetInfo::CharPtrBuiltinVaList;