Allowing individual targets to determine whether a given calling convention is allowed or ignored with warning. This allows for correct name mangling for x64 targets on Windows, which in turn allows for linking against the Win32 APIs.
Fixes PR13782
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165015 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index b09ec08..5671a0f 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -3638,6 +3638,13 @@
default: llvm_unreachable("unexpected attribute kind");
}
+ const TargetInfo &TI = Context.getTargetInfo();
+ TargetInfo::CallingConvCheckResult A = TI.checkCallingConvention(CC);
+ if (A == TargetInfo::CCCR_Warning) {
+ Diag(attr.getLoc(), diag::warn_cconv_ignored) << attr.getName();
+ CC = TI.getDefaultCallingConv();
+ }
+
return false;
}