werat added a comment.
In D113498#3139112 <https://reviews.llvm.org/D113498#3139112>, @shafik wrote:
> On the other hand this is a well-formed constant expression:
>
> static const int x =0;
> constexpr const int* ip1 = &x + 1;
>
> Does that get you the test case you need?
This expression seems to be similar to what I have in the test case now.
(lldb) p static const int x = 0; constexpr const int* ip1 = &x + 1;
...
; Function Attrs: convergent noinline nounwind optnone
define dso_local void @"?$__lldb_expr@@YAXPEAX@Z"(i8* %"$__lldb_arg") #0 {
entry:
%"$__lldb_arg.addr" = alloca i8*, align 8, !clang.decl.ptr !9
%ip1 = alloca i32*, align 8, !clang.decl.ptr !10
store i8* %"$__lldb_arg", i8** %"$__lldb_arg.addr", align 8
store i32* bitcast (i8* getelementptr (i8, i8* bitcast (i32*
@"?x@?1??$__lldb_expr@@YAXPEAX@Z@4HB" to i8*), i64 4) to i32*), i32** %ip1,
align 8
ret void
}
As far as I understand, `getelementptr (i8, i8* bitcast (i32*
@"?x@?1??$__lldb_expr@@YAXPEAX@Z@4HB" to i8*), i64 4)` is a well-formed
constant expression, however it has `GlobalVariableVal` as one of it's operand.
Even though `GlobalVariableVal` is `Constant`, I think it's not always possible
to resolve its value (please correct me if that's not true, not very familiar
with IR). Even if there's a way, it's not currently implemented in the
IRInterpreter -- `CanResolveConstant` will return false when it sees
`GlobalVariableVal`.
Repository:
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CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D113498/new/
https://reviews.llvm.org/D113498
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