https://bugs.llvm.org/show_bug.cgi?id=41458
Bug ID: 41458
Summary: need to mangle string literal objects in inline
variable initializers
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++'17
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Testcase:
inline const char *const str = "foo";
const char *p = str;
For this, Clang emits:
@.str = private unnamed_addr constant [4 x i8] c"foo\00", align 1
@p = dso_local global i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str,
i32 0, i32 0), align 8
... which is incorrect. 'str' is required to have a single value across
translation units, so the same string literal object must be used as its
initializer in all cases.
We need to give the string literal a mangling in this case. The Itanium ABI
doesn't specify a mangling for this case; I've filed
https://github.com/itanium-cxx-abi/cxx-abi/issues/78 for that.
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