Verifier: Check wchar_size module flag.
Differential Revision: https://reviews.llvm.org/D32974
llvm-svn: 303460
diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 3b68d63..4b9bdcf 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -1317,6 +1317,15 @@
Assert(Inserted,
"module flag identifiers must be unique (or of 'require' type)", ID);
}
+
+ if (ID->getString() == "wchar_size") {
+ ConstantInt *Value
+ = mdconst::dyn_extract_or_null<ConstantInt>(Op->getOperand(2));
+ Assert(Value, "wchar_size metadata requires constant integer argument");
+ uint64_t WCharSize = Value->getZExtValue();
+ Assert(WCharSize == 0 || WCharSize == 2 || WCharSize == 4,
+ "wchar_size should be 0, 2 or 4");
+ }
}
/// Return true if this attribute kind only applies to functions.