| Issue |
172597
|
| Summary |
[C++20] [Modules] Reduced BMI includes unnecessary internal constants used by inline functions
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TroyKomodo
|
```bash
clang++ -std=c++20 -Brepro --precompile -fmodules-reduced-bmi \
-Wno-builtin-macro-redefined -D__DATE__="" -D__TIME__="" -D__TIMESTAMP__="" \
-fmodule-output=module.reduced.pcm \
-o module.full.pcm module.cppm
```
```c++
export module mymodule;
constexpr int CONSTANT = 1;
namespace mynamespace {
class MyClass {
int x;
public:
MyClass(int x) : x(x) {}
int getX() const { return x + CONSTANT; }
};
}
```
In this example the reduced bmi contains source information so changing the constant (1 -> 2) causes a different reduced bmi forcing recompiling of any dependencies.
Something else to note is on my machine if i change it back (2 -> 1) the file hash of the module interface is different yet dumping it with `llvm-bcanalyzer --dump` is the same.
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
