For unnamed structs or unions, C's compatible types rule applies. Two
compatible types in different compilation units can have different
mangled names, meaning the metadata emitted below would incorrectly mark
them as no-alias. Use AnyPtr for such types in both C and C++, as C and
C++ types may be visible when doing LTO.
PR: https://github.com/llvm/llvm-project/pull/116596
This reverts the revert commit bee240367cc48bbc93fe5eb57d537968dfe4419f.
This version includes updates to the tests to use patterns when matching
the pointer argument.
Original commit message:
This patch extends Clang's TBAA generation code to emit distinct tags
for incompatible pointer types.
Pointers with different element types are incompatible if the pointee
types are also incompatible (modulo sugar/modifiers).
Express this in TBAA by generating different tags for pointers based on
the pointer depth and pointee type. To get the TBAA tag for the pointee
type it uses getTypeInfoHelper on the pointee type.
(Moved from https://reviews.llvm.org/D122573)
PR: https://github.com/llvm/llvm-project/pull/76612
This patch extends Clang's TBAA generation code to emit distinct tags
for incompatible pointer types.
Pointers with different element types are incompatible if the pointee
types are also incompatible (modulo sugar/modifiers).
Express this in TBAA by generating different tags for pointers based on
the pointer depth and pointee type. To get the TBAA tag for the pointee
type it uses getTypeInfoHelper on the pointee type.
(Moved from https://reviews.llvm.org/D122573)
PR: https://github.com/llvm/llvm-project/pull/76612
This adds -no-opaque-pointers to clang tests whose output will
change when opaque pointers are enabled by default. This is
intended to be part of the migration approach described in
https://discourse.llvm.org/t/enabling-opaque-pointers-by-default/61322/9.
The patch has been produced by replacing %clang_cc1 with
%clang_cc1 -no-opaque-pointers for tests that fail with opaque
pointers enabled. Worth noting that this doesn't cover all tests,
there's a remaining ~40 tests not using %clang_cc1 that will need
a followup change.
Differential Revision: https://reviews.llvm.org/D123115
