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| author | Bernhard Schommer <bernhardschommer@gmail.com> | 2016-09-15 12:32:26 +0200 |
|---|---|---|
| committer | Bernhard Schommer <bernhardschommer@gmail.com> | 2016-09-15 12:37:02 +0200 |
| commit | 6f2b5713f8e378e6e074f35a537e86a497c64e35 (patch) | |
| tree | 87d80f8a4dd0de1f0594fc67c48ff26a58c68056 /backend/Regalloc.ml | |
| parent | 9124c9231c11effae6e32d73c6c8af7c4032f928 (diff) | |
| download | compcert-kvx-6f2b5713f8e378e6e074f35a537e86a497c64e35.tar.gz compcert-kvx-6f2b5713f8e378e6e074f35a537e86a497c64e35.zip | |
Add interference for indirect calls.
Avoids problems with overwritting the registe containing the
function address.
Bug 19779
Diffstat (limited to 'backend/Regalloc.ml')
| -rw-r--r-- | backend/Regalloc.ml | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/backend/Regalloc.ml b/backend/Regalloc.ml index 0013d91a..b91bad27 100644 --- a/backend/Regalloc.ml +++ b/backend/Regalloc.ml @@ -657,9 +657,12 @@ let add_interfs_instr g instr live = | Xstore(chunk, addr, args, src) -> add_interfs_destroyed g live (destroyed_by_store chunk addr) | Xcall(sg, vos, args, res) -> + begin match vos with + | Coq_inl v -> List.iter (fun r -> IRC.add_interf g (vmreg r) v) destroyed_at_indirect_call + | _ -> () end; add_interfs_destroyed g (vset_removelist res live) destroyed_at_call | Xtailcall(sg, Coq_inl v, args) -> - List.iter (fun r -> IRC.add_interf g (vmreg r) v) int_callee_save_regs + List.iter (fun r -> IRC.add_interf g (vmreg r) v) (int_callee_save_regs @ destroyed_at_indirect_call) | Xtailcall(sg, Coq_inr id, args) -> () | Xbuiltin(ef, args, res) -> |