Patch to issue error when target of MacOS and iOS
does not support large load/store of atomic objects.
// rdar://13973577
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@182781 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index f5e4b42..946d3df 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -8030,3 +8030,17 @@
"ParmIndices lacks entry set by ParmVarDecl");
return I->second;
}
+
+bool ASTContext::AtomicUsesUnsupportedLibcall(const AtomicExpr *E) const {
+ const llvm::Triple &T = getTargetInfo().getTriple();
+ if (!T.isOSDarwin())
+ return false;
+
+ QualType AtomicTy = E->getPtr()->getType()->getPointeeType();
+ CharUnits sizeChars = getTypeSizeInChars(AtomicTy);
+ uint64_t Size = sizeChars.getQuantity();
+ CharUnits alignChars = getTypeAlignInChars(AtomicTy);
+ unsigned Align = alignChars.getQuantity();
+ unsigned MaxInlineWidthInBits = getTargetInfo().getMaxAtomicInlineWidth();
+ return (Size != Align || toBits(sizeChars) > MaxInlineWidthInBits);
+}