================
@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple x86_64-linux-pc -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple x86_64-windows-pc -fsyntax-only -verify -std=c++11
%s
+// RUN: %clang_cc1 -triple i386-linux-pc -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple i386-windows-pc -fsyntax-only -verify -std=c++11 %s
+
+#if __BITINT_MAXWIDTH__ >= 35
+struct {
+ _BitInt(35) i : 33;
+} x;
+struct {
+ _BitInt(35) i : 34;
+} y;
+_BitInt(33) xx{ x.i };
+_BitInt(33) yy{ y.i };
+// expected-error@-1 {{non-constant-expression cannot be narrowed from type
'_BitInt(35)' to '_BitInt(33)' in initializer list}}
+// FIXME-expected-note@-2 {{insert an explicit cast to silence this issue}}
+#endif
+
+#if __BITINT_MAXWIDTH__ >= 3
----------------
AaronBallman wrote:
Same here
https://github.com/llvm/llvm-project/pull/78112
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