| Issue |
176655
|
| Summary |
[GVN] Missing store to load forwarding for memset.pattern
|
| Labels |
llvm:optimizations,
missed-optimization
|
| Assignees |
|
| Reporter |
nikic
|
https://llvm.godbolt.org/z/GzehrjsxW
```llvm
define <8 x i32> @test_pattern(ptr %p) {
call void @llvm.experimental.memset.pattern.p0.i32.i64(ptr %p, i32 42, i64 8, i1 false)
%load = load <8 x i32>, ptr %p
ret <8 x i32> %load
}
define <8 x i32> @test_plain(ptr %p) {
call void @llvm.memset.pattern.p0.i64(ptr %p, i8 42, i64 32, i1 false)
%load = load <8 x i32>, ptr %p
ret <8 x i32> %load
}
```
The latter case forwards, the former does not.
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
