| Issue |
81494
|
| Summary |
[FMV] incorrect codegen when there is no TU-local caller
|
| Labels |
clang:codegen
|
| Assignees |
|
| Reporter |
jroelofs
|
https://clang.godbolt.org/z/heoTnxqz5
Compare:
```
__attribute__((target_version("dotprod+lse")))
int foo(void) { return 1; }
__attribute__((target_version("default")))
int foo(void) { return 0; }
#ifdef HAS_CALLER
int caller(void) { return foo(); }
#endif
```
```
--rtlib=compiler-rt -O2 -DHAS_CALLER=1
```
vs
```
--rtlib=compiler-rt -O2
```
While GCC's version has self-consistent and correct behavior, IMO it would be better to always emit the weak ifunc+resolver along with the definition of the `default` version so you can forward-declare the not-attributed version of the function and call these from any other TU.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
