CBE pass 2 invalidates proc points
The attached file is from reduced from NoFib's spectral/integer
.
When I compile this with -O2 -fllvm
, I get the following panic on HEAD:
ghc-stage2.exe: panic! (the 'impossible' happened)
(GHC version 8.5.20180329 for x86_64-unknown-mingw32):
Each block should be reachable from only one ProcPoint
FWIW, I don't have the LLVM toolchain installed, but this is still in GHC's backend.
Trac metadata
Trac field | Value |
---|---|
Version | 8.5 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Windows |
Architecture |