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| author | Xavier Leroy <xavier.leroy@inria.fr> | 2018-06-01 16:52:02 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavier.leroy@inria.fr> | 2018-06-01 16:52:02 +0200 |
| commit | c58b421571b0354eea602adbdae674bd1f4847e3 (patch) | |
| tree | 8c83d3d7428097523d8af00b9abdcf117532be30 /arm/Asmgenproof.v | |
| parent | 24951d885fbadb8f2fa96ea44a6d3b2a397eab00 (diff) | |
| download | compcert-kvx-c58b421571b0354eea602adbdae674bd1f4847e3.tar.gz compcert-kvx-c58b421571b0354eea602adbdae674bd1f4847e3.zip | |
Model external calls as destroying all caller-save registers
The semantics of external function calls in LTL, Linear, Mach and Asm
now consider that all caller-save registers are set to Vundef by the call.
This models that fact that the external function can modify those registers
arbitrarily.
Update the proofs of the Allocation, Tunneling, Stacking and Asmgen passes
accordingly.
Diffstat (limited to 'arm/Asmgenproof.v')
| -rw-r--r-- | arm/Asmgenproof.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arm/Asmgenproof.v b/arm/Asmgenproof.v index abec6815..2c001f45 100644 --- a/arm/Asmgenproof.v +++ b/arm/Asmgenproof.v @@ -926,8 +926,8 @@ Opaque loadind. apply plus_one. eapply exec_step_external; eauto. eapply external_call_symbols_preserved; eauto. apply senv_preserved. econstructor; eauto. - apply agree_set_other; auto with asmgen. - eapply agree_set_pair; eauto. + unfold loc_external_result. apply agree_set_other; auto. apply agree_set_pair; auto. + apply agree_undef_caller_save_regs; auto. - (* return *) inv STACKS. simpl in *. |