Fix for codegen crash on multibit bool bitfield initialization
<rdar://problem/6078606>
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53737 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index fe11a5f..813bcfb 100644
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -145,6 +145,13 @@
while (offset < (fieldOffset & -8))
offset += CGM.getTypes().getTargetData().getTypeStoreSizeInBits(Elts[i++]->getType());
+ // Promote the size of V if necessary
+ // FIXME: This should never occur, but currently it can because
+ // initializer constants are cast to bool, and because clang is
+ // not enforcing bitfield width limits.
+ if (bitFieldInfo.Size > V.getBitWidth())
+ V.zext(bitFieldInfo.Size);
+
// Insert the bits into the struct
// FIXME: This algorthm is only correct on X86!
// FIXME: THis algorthm assumes bit-fields only have byte-size elements!